Ceramic & Construction Materials

Aluminium Hydroxide [Al(OH)₃] is mostly used as a flame retardant filler in the wire and cable, construction and friction industry.

Our grades offer not only technical properties like ultra fine particles, very narrow particle size distributions and platelet-like morphologies, but also high specific surface areas. Often this product is also used in clutch facings, due to its very hygroscopic nature.

Aluminium Hydroxide does not generate toxic or corrosive gases during thermal decomposition. In addition, there is a distinct reduction in smoke density and it is free of halogens. 

There are also silanized grades available for longer durability of this raw material.

Aluminium Nitride (AlN) has a Wurtzite structure. It has a high thermal conductivity and is used in multiple microelectronics, semiconductors, nano-photonic circuits, piezo-electrical and thermo-physical applications as well as many others.

Available in micron- and nano- particle size distributions. 

We offer both calcined as well as fused Aluminium Oxides (Al₂O₃).

Calcined Aluminium Oxides are among the most commonly used abrasives in the friction materials industry and come in two varieties, alpha and gamma oxides. 

While alpha oxides have a high hardness of 8-9 Mohs they are still not overly aggressive towards the brake disc unless a high-calcined grade is chosen. In general, the higher the grade of calcination, the harder and more crystal-like the material.

Gamma oxides on the other hand have a lower hardness of 6-7 Mohs and tend to be less used, mostly for special applications in NAO type friction-formulations only.

We also carry a variety of special grades with very fine particle sizes that have shown to lower disc wear while maintaining friction level, such as NO265. This grade is also recommended to solve metal pick up issues.

Fused Aluminium Oxides, sometimes also referred to as corundum, are widely used raw materials in the abrasives and refractories industry.

Depending on the mix ratio of the base materials, the resulting material is referred to as brown or white fused alumina because of the respective colour.

Its main properties are a high hardness of typically 9 Mohs as well as abrasiveness and temperature stability. It is more often used in heavy duty friction applications where a high load friction coefficient is the major concern.

Aluminium Titanate (Al₂TiO₅) is a technical oxide-ceramics known for its excellent thermal shock resistance behavior, low thermal conductivity and very low thermal expansion coefficient. 

Therefore it is often used for components subject to high thermal stress levels. In addition, the material possesses good corrosion resistance and very low wettability by non-ferrous melts. 

Potential applications can be found in various industries, such as special ceramics, foundry, automotive (cylinder liners, port liner, friction), low-pressure-casting and the production of light metals/alloys.     

Our standard grades are available in different particle size distributions, e.g. 0-10 μm, 0-20 μm and 0-60 μm.

Baryte is a mineral consisting mainly of barium sulfate (BaSO₄). 

We offer natural Barytes as well as precipitated grades.

The Baryte group consists of natural barium sulfate, celestine, anglesite and anhydrite. Baryte itself is generally white or colorless, and is the main source of barium. 

We are able to supply high quality Barytes. Beside standard qualities we can offer also snow white precipitated grades with different sieve analyses. 

All of our Barytes show the following advantages compared to many other Barytes: 

• a low SiO₂ content and
• an extremely low content of heavy metals.

For friction materials "close-cuts" are available, i.e. grades with a reduced content of fines or specified particle size distributions.

The main application is for drilling purposes and also as heavy filler with a density of approx. 4.5 g/cm³ for paints, lacquers, other coatings and many more products. 

Due to its low Mohs hardness (3-3.5) it is giving good lubrication at room temperature. 

Bentonite is a volcanic ash/clay consisting mainly of montmorillonite. Though there are different types, depending on the dominant element (either Al, Ca, K, or Na) we offer the most requested sodium (Na) type only. 

The main application is drilling mud, but it has multiple uses in different industries and also as water adsorbent in agriculture. Dry soil, such as deserts or pure sand, can be used for agricultural crop-growing due to the high water adsorption of the Bentonite, which hinders a fast drying-out of the soil. 

Further uses are e.g. in binders, cosmetics, foundry sand, paints, and coatings.

We offer both DiCalcium Phosphate as well as TriCalcium Phosphate.

• DiCalcium Phosphate

DiCalcium Phosphate is applied as a food supplement for non-ruminant animals.

• TriCalcium Phosphate

This is a natural, white product. For the production of TriCalcium Phosphate only fresh bones approved by the National Inspection Service for Livestock and Meat are used. TriCalcium Phosphate is obtained from crushed, degreased and degelatinized bone chips and calcined at a temperature of 1,100°C. TriCalcium Phosphate is free from organic material, chemically inert and has been obtained from Bone Ash by a special milling and sifting procedure.

TriCalcium Phosphate is used in the non-ferrous casting industry to protect the equipment, e.g. launders for mould coating and as a release agent. In the friction materials industry, it acts as mild abrasive and functional filler, as well as mild anti-corrosive.

Hexagonal Boron Nitride (hBN) has a very good thermal conductivity, good electric insulation, and also a good thermal shock resistance. These properties make it suitable for use in ceramic materials, coming from - for example - a hot pressing process. The material withstands temperatures of up to 2,000°C in non-oxidizing atmospheres and up to approximately 750°C in oxidizing atmospheres. Hexagonal Boron Nitride is not wetted by most molten metals; this is of advantage for some refractory materials in casting processes.

Moreover, Hexagonal Boron Nitride has a low coefficient of friction, so that it is part of some lubricant compositions; it is also called “white graphite” because of a similar crystalline structure.

Calcium Hydroxide is an inorganic compound with the chemical formula Ca(OH)₂. It is a colorless crystal or white powder; when calcium oxide (called lime or quicklime) is slaked with water it reacts to Calcium Hydroxide in an exothermic reaction. It can also be created by mixing an aqueous solution of calcium chloride and an aqueous solution of sodium hydroxide.

An alternative name for Calcium Hydroxide is caustic lime, or Hydrated Lime. If heated, Calcium Hydroxide decomposes into calcium oxide and water.

Applications:

Because of its low toxicity and mild basic properties, Calcium Hydroxide has various uses, such as:

As reagent

• in the tanning industry for neutralization of extra acid,
• in the petroleum refining industry for the manufacture of additives to oils,
• in water/sewage treatment as flocculant,
• in the chemical industry for manufacture of calcium stearate,
• in the food industry for processing water (for alcoholic and soft drinks) and
• for clearing a brine of carbonates of calcium and magnesium in the manufacture of salt for food and pharmacopoeia.

As filler

• in the petrochemical industry for manufacturing solid oil of various types,
• in the production of brake pads,
• in the manufacture of ebonite,
• for preparation of dry mixes for painting and decorating,
• in manufacturing mixes for pesticides, and as
• a dressing in paste form used for anti-microbial effect during a dental root canal procedure.

Our Colemanite is a hydrous calcium borate with the chemical formula 2CaO 3B₂O₃ 5H₂O, belonging to the group of Boron Minerals. Boron Minerals have many applications. 

• Agriculture

In agriculture boron minerals are essential micronutrients for plants, vital to their growth and development. The role of boron minerals is associated with the cell division and development of the growth parts of the plants. They are also needed for a good fertilization, seeding and fruit growth. The use of boron micronutrients in soils with high deficiency can increase productivity around 30%. 

• Ceramics

Due to their strong fluxing action boron minerals are essential ingredients in many ceramic glazes and enamels. 

• Glass

Boron minerals are important ingredients in many glass types like glass wool, fiberglass, optical fiberglass and borosilicate glasses. 

• Detergents

Different forms of borates are used for laundry detergents and cleaners as bleaching agent, enzymes stabilizer, alkaline buffering etc. 

• Metallurgical

In the metallurgical industry, borates are used in the production of steel and non-ferrous metals, alloys, magnets and welding compounds; this is due to their fluxing activity during the smelting process (dissolving impurities and protecting the metal). 

• Rubber and Plastics

In rubber and plastics boron minerals are used as flame retardants and polymer additives. 

• Construction Materials

Colemanite is applied as a flame retardant e.g. in bituminous cardboard roofings. 
In neutron shielding concrete Colemanite is an economic aggregate to enhance the shielding properties.

Beside these main applications there are numerous other uses of boron and boron compounds like wood preservation, polymerization agent, pharmaceutical and cosmetics.

Cordierite has a low shrinkage during sintering and a Cordierite ceramic has a low thermal expansion, so that it withstands thermal shocks relatively well. The operation temperature is up to 1,200°C. Cordierite ceramics are used as heater formers, for kiln furniture or generally in heat engineering.

DiCalcium Phosphate is applied as a food supplement for non-ruminant animals.

We also supply TriCalcium Phosphate.

DiTungsten Pentaboride (W₂B₅) is a synthetic compound of tungsten and boron. Its hardness is similar to cBN, while offering a higher resistance to oxidation than synthetic diamond (at high temperatures). It shows good thermal conductivity as well as electrical conductivity.

DiTungsten Pentaboride is e.g. used for making high-speed cutting tools, drilling tools and composite-sheets. The advantage of DiTungsten Pentaboride-coated tools is that they cannot contaminate the steel with carbon.

Another exemplary application is in high‑temperature oxidation‑resistant refractories.

The density is 15.3 g/cm³, the melting point is 2,365 °C.

Expandable Graphite is deriving from natural flake graphite by incorporating acids during production. 

As soon as Expandable Graphite is heated the intercalations form gases which lead to the expansion, multiplying the space between the layers. This effect is mainly used for the flame retardation of different materials to which Expandable Graphite is added. Depending mainly on the particle size, the amount and type of acid the expansion can start between approx. 130°C-230°C. 

Expandable Graphite prevents a flame progression by both plain volume - which has an insulating effect - and by covering a material which blocks the contact with oxygen to some extent. 

The main use is for graphite foils, which are used for heat and chemical insulation, e.g. in gland packings and chemical protection. Further important uses are insulation of cables or bituminous cardboards as well as foamed materials such as special seats and mattresses, which require flame and fire proof properties. 

Feldspar is a common rock forming mineral. It is a basic material for a variety of silicate ceramics and porcelains.

We provide special, pure qualities low in iron, manganese, mica and dark spots. Our Potassium and Sodium Feldspars can be delivered in lumps or ground to 200 or 300 mesh (75 resp. 56 µm).

We can provide Fluorspar (also called Fluorite) concentrate or metallurgical grade Fluorspar in different particle size distributions and purities. Even high-purity grades with CaF₂ ≥ 99% are available. 

It is the mineral form of calcium fluoride (CaF₂), which is mainly used as flux for smelting, the production of glasses and enamels, and as friction stabilizer as well lubricant (depending on the formulation) in friction materials. 

Hematite (Fe₂O₃) is used as a mild abrasive in friction materials (Mohs hardness 5.5-6.5) and as a red pigment for the underlayer of disc brake pads. Furthermore, it can be used to improve the thermal and electrical conductivity of the friction material, the latter being helpful in case the brake pads run through a corona-style powder coating process (especially in case of NAO formulations).

Our Hydroboracite is a hydrated Calcium Magnesium Borate with the chemical formula 
CaO MgO₃B₂O₃ 6H₂O, and belongs to the group of boron minerals. Boron minerals have many applications, e.g. the below:

• Agriculture

In agriculture boron minerals are essential micronutrients for plants, vital to their growth and development. The role of boron minerals is associated with the cell division and development of the growth parts of the plants. They are also needed for a good fertilization, seeding and fruit growth. The use of boron micronutrients in soils with high deficiency can increase productivity around 30%. 

• Forestry

Coarse Hydroboracite is used as a long-term nutrient in forests.

Iron Oxides are durable products that are widely used in pigments, coatings or paints to produce a range of colors. 

In the friction materials industry the most common application is as non-functional pigments to change the color of underlayers or the friction material itself. 

Magnetite (Fe₃O₄) is a key component in NAO/organic formulations, acting as mild abrasive and supporting corona-style powder coating. 

Alroko supplies specific Iron Oxide grades that are very popular in both NAO/organic formulations and low-steel formulations. Natural and synthetic grades are available in many different particle size distributions. 

Iron Powders have a large number of different applications in various industries. Most notably among them are the foundry/steel industry and for sintered products in the powder metallurgy.

In the friction materials industry, Iron Powders are main constituents in low-steel and semi-met formulations, where they act as mid-level abrasives and help to improve the heat resistance of the friction material.

There are four common variants: Air/water atomized powders; electrolytic powders; carbon-reduced and hydrogen-reduced powders. Each differing in the method of production and final product properties.

Our key products are carbon- and hydrogen-reduced Sponge Iron Powders.

Kaolin is a naturally occurring clay mineral, a sheet silicate, which mainly consists of kaolinite (Al₂Si₂O₅(OH₄)). It is also called china clay. It derives from aluminium silicate minerals, mainly weathered feldspar, and therefore contains other minerals such as quartz and mica as well. Depending on the level of these impurities, the character of Kaolin changes. 

Its appearance is in most deposits white and glossy. The hardness is about 2.5 Mohs and it has a soft and flexible touch, i.e. it is not abrasive. 

More than 50% of the world production is used for the production of paper after muddling (washing out) a major part of the SiO₂. 

We offer the mined raw Kaolin type with approx. 70-75% SiO₂. Its main applications are in many different industries, e.g. ceramics and as filler in rubber, plastics, paints etc.

In the friction materials industry, Kaolin is used as low cost filler in both dry and wet mixes. Different particle sizes are available.

Kyanite is an aluminosilicate mineral. It has needle-like crystals with unique properties making it a valuable raw material in refractories, ceramics and other products.  

Kyanite undergoes an irreversible expansion of approx. 10% when heated up to approx. 1,250°C, which is used by refractory and ceramic manufacturers to reduce shrinkage during initial firing. This makes it possible to produce nearly net shaped green bodies and avoids the forming of shrinkage cracks in the ceramic part. 

In friction materials this expansion can compensate fading. The needle-like crystals lend cold "green" strength and abrasion resistance to the end product. 

The hardness in Mohs is 4 in length and 7 in cross direction.

Magnesite is the mineral, which is processed into many magnesium containing products. It can be used for the production of fertilizers, as a binder material, e.g. in flooring material (so called Magnesite screed), as mineral flame retardant and smoke suppressant in plastics, as catalyst, filler and reinforcing agent in the production of synthetic rubber (e.g. neoprene), in cosmetics and in the preparation of magnesium chemicals. 

High purity grades can also be used as food additive (e.g. prevents table salt from clumping together) which is known as E504. 

We offer different grades of natural, anhydrous (from processing the mineral Magnesite) and synthetic Magnesium Carbonates – light and heavy. 

The product is generally used as precursor for the production of Magnesium Oxide (by calcination), which is an important refractory material used as lining (in form of refractory bricks) in blast furnaces, kilns and incinerators. Please refer to our various Magnesium Oxide products for further information.

We offer different qualities of Magnesium Chloride (hexahydrate), MgCl₂ x 6H₂O - in flake or powder form - ranging from technical over food to pharmaceutical grades.

Magnesium Chloride is mainly used as precursor for the production of solid magnesium by electrolysis. It is also used for dust control/as a suppressant for powders and bulk material. Together with Magnesium Oxide it is used in magnesium oxychloride cements (Sorel cement). 

As catalyst support it is able to increase not only the activity but also stereospecifity of traditional catalysts (Ziegler-Natta) for the production of polyolefines.

Solutions of pharmaceutical grades can be used in the treatment of electrolyte deficiencies and in dialysis solutions. 

Other applications include:

• detergents and treatment of textiles
• animal feed additive and in fertilizer mixtures
• drilling fluids
• as de-icing agent on roads, highways, sidewalks, etc.

We offer different qualities of natural (from processing the mineral brucite) and synthetic Magnesium Hydroxide - also high purity grades, which are suitable for use in pharmaceutical and food applications. 

The product is generally used in various industrial applications, e.g. as mineral flame retardant in the construction and electronic industry, technical ceramics, enamel production, water treatment, flue gas treatment and in agricultural applications. The high purity grades can also be used as raw materials for chemical processes with low residual heavy metal requirements.

Magnesium Oxide is one of the main products used in the friction materials industry to regulate the pH value of a formulation as well as to improve thermal stability of phenolic resins.

Most of the Magnesium Oxides used in friction is derived from a calcination process of Magnesium Carbonate, resulting in a product sometimes also called "caustic calcined Magnesium Oxide". 

Synthetic (or precipitated) Magnesium Oxide is used to a lesser extent, since the overall reactivity tends to be lower than that of the natural material, while being more expensive as well. 

The third type of Magnesium Oxide called Dead Burned Magnesite is not regularly used in friction, since the manufacturing process leaves the material almost inert and non-reactive, which makes it less beneficial for above mentioned purposes. It is therefore only used in such cases where pH regulation is not the reason for using Magnesium Oxide.

Other industries that Magnesium Oxide is used in are floor pavements, heat-resistant kiln furnishings and the feed & food industry.

We can offer a natural black Magnetite of high purity (min. 98.5% Fe₃O₄) with an extremely low content of SiO₂. This material is not chemically treated. The hardness is 5.5 Mohs; various - also micronized - particle size distributions are available.

Main applications: 

• Friction (as mild abrasive and to support corona-style powder coating)
• Magnetic paints 
• Pigments
• VIP (Vacuum Insulation Panels)

We offer Muscovite and Phlogopite Mica (also coated with organo-silicon compounds), dry- and wet-ground, in different particle size distributions, also micronized. 

Mica is a natural lamellar mineral with several unique physical properties. Its ability to form layers which can be easily split or delaminated due to its crystalline structure results in thin sheets which are chemically inert, elastic, flexible, resilient, insulating and dielectric. It is stable during exposure to high temperatures, light, moisture and electricity.

Muscovite Mica is mainly used as thermal and electrical insulation filler material and by the electrical industry e.g. in capacitors (ideal for high and radio frequencies) and for commutators, whereas Phlogopite Mica can be used in higher temperature applications (up to 900°C), due to its increased thermal stability.

Ground Mica in general can be used in a variety of applications, e.g., as filler for shiny paints and also as pigment extender in the paint industry, various plastics, welding rods, cosmetics, additive to drilling fluids in the well-drilling industry, and as lightweight noise insulation and reinforcing material in the automotive sector. 

In the friction materials industry Mica is used due to its outstanding heat resistance properties.

The rubber processing industry uses Mica mainly as separating agent.

Micaceous Iron Oxide is a mineral with a lamellar structure, offering a high chemical resistance; it is used in anti-corrosion paints for high performance, such as those covering metallic structures, oil platforms and refineries.

It is also used in friction materials where it reduces disc wear, provides a higher friction coefficient and improves noise behavior. Various particle size distributions are available.

A catch-all-term for a variety of products whose common feature is their sphericity. Microspheres are available as solid and hollow products and their main use is in products where adding bulk and improving flow characteristics are helpful to the process; such as super abrasives and paint industry.

We carry products whose main components are SiO₂ and Al₂O₃ in various sizes; spheres made from other components are available on request.

We can offer liquid and dry powder Mould Release Agents in highly concentrated qualities.

The liquids are water-soluble, without silicones and can be easily diluted to the desired concentration before application by brush or spray-gun. The agent forms a thin, very resistant film after hardening, which prevents the moulding compound to remain in the mould after pressing/curing. Our Mould Release Agents for demoulding of pressed articles, such as brake pads/linings or clutch facings, work up to approx. 200°C.

For dry Mould Release Agents see Hexagonal Boron Nitride and also Bone Ash, as well as Alumina Papers, which are used as mould release sheets.

Nano Silicon Powder (Si) is a semiconductor material with enhanced properties like a high specific surface area and a high purity (> 98%), and is available in various particle size distributions. 

Nano Si has a wide range of applications. It can be incorporated in rechargeable batteries as the negative electrode material for improved capacity and other properties. It can also be added to lacquers to fill surface cracks and increase gloss.

Nano Silicon Carbide (SiC) powder has high hardness and strength, both higher than corundum. In addition, it shows high chemical stability and high temperature resistance while being a semiconductor material. 

Nano SiC powder can be used for creating nano composites that show ideal properties for the use for electronic and optoelectronic devices, especially with low energy consumption and high temperature resistance. It is expected to be used as field emitter in electronics.

Nano Silicon Dioxide (SiO₂) has a very high specific surface area. Depending on the applied surface treatments it is possible to achieve modifications with hydrophilic or lipophilic properties.  

Nano SiO₂ is used in the paint, rubber and cement & concrete industry, enhancing suspension stability, thixotropy, strength, toughness, wear resistance and aging resistance.

Nano Silicon Nitride (Si₃N₄) has a very high hardness ranging between corundum and diamond as well as a high tensile strength not only at room temperature but also at high temperatures.

Nano Si₃N₄ can be used for treating surfaces of special devices and tools to gain higher stress and temperature resistance. Such devices may be cutting tools, turbine blades, rotors and dies.

Nano Titanium Carbide (TiC) powder shows high hardness and can withstand high temperatures, with a melting point of above 3,100°C. 

Nano TiC can be used for producing high quality grinding devices such as grinding pastes or grinding wheels that show improved grinding efficiency, accuracy as well as surface finish.

Nano Titanium Nitride (TiN) powder is chemically stable and non-toxic, shows good thermal conductivity and good absorption of infrared rays. The average particle size is 20 nm and the purity is higher than 97%. 

Nano TiN is being used for the production of high quality PET-resin for PET-bottles. Such bottles show increased durability, reduced color change due to ageing and the contained liquids remain fresh longer because of the IR absorption.

Nano Zinc Oxide (ZnO) is a white powder with peculiar properties such as screening ultra-violet rays, absorbing infra-red rays, sterilization and health protection, lowering temperature or heat insulation. 

Commonly used in the rubber industry, Nano Zinc Oxide can improve tear resistance, the comprehensive mechanical property and the life span of rubber.

It is also used as an additive in numerous materials and products including different rubber qualities, plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants and first-aid tapes.

We offer different color Pigments, mainly based on metal oxides. The advantage of these compounds is their color stability even in outdoor applications. We have Pigments for black, red, yellow, brown, green and blue, which can be used for the production of cement, lime, ceramics, plastics and paints, as well as to color friction material mixes.

Polyethylene Oxide (PEO) is a high molecular weight, water-soluble, micro-granular powder ranging from a molecular weight of 100,000 g/mol to 9,000,000 g/mol. It can be used in a variety of applications (e.g. water-based adhesives, cosmetics, water-based paints, paper pulps, concrete, batteries, ceramics, etc.). 

Depending on the grade, the transition from dispersing agent to flocculent is fluent. PEO also functions as thickening and lubricating agent and can be generally regarded as processing aid and may offer additional useful effects depending on the application.

As a novelty, we also offer modified PEO with lower crystallization properties or added functional groups which increase solubility with hydrophobic ingredients (e.g. CNT) or functional groups which add a cross-linking effect to PEO.

Rare Earth Powders include a set of seventeen chemical elements, specifically the fifteen lanthanides, as well as scandium and yttrium.

Various powders in different particle size distributions are available. 

Our Amorphous Silica (also Fumed Silica) is available as micro scaled and as nano scaled material. It is for example used for strengthening concretes, or as a filler in plastics or in insulation panels.

Silicon Carbide (SiC), also known as carborundum, is a semiconductor containing silicon and carbon. Grains of Silicon Carbide can be bonded together by sintering to form very hard ceramics that are widely used in applications requiring high endurance, such as brake pads or clutch facings, as well as ceramic plates.

Silicon Carbide is a popular abrasive in modern lapidary due to the durability and low cost of the material. In manufacturing it is used for its hardness in abrasive machining processes such as grinding, honing, water-jet cutting and sandblasting. It is also used for high performance "ceramic" brake discs, as it is able to withstand extreme temperatures.

We can supply green and black Silicon Carbide.

Our synthetic Sintered Mullite is extremely even in quality, especially compared to fused mullites. It is used for all kinds of friction material formulations with great success already. 

For light vehicle disc brake pads particularly the grade K0 (0-0.1 mm) is used. For a higher coefficient of friction, such as in commercial vehicle brake pads and blocks or sintered friction materials, the coarser grade K1 (0-0.5 mm) is mainly used.

Our customers report as follows:

• stabilizes the coefficent of friction μ
• improves the thermo shock resistance
• swelling of the friction material is reduced
• improves performing in corrosive environment

These advantages are mainly caused by the interlocked crystallites (in the μm range) of the mullite. The Mohs hardness is in the range of 6-7. The quantity in the formulation can vary between 2-8%, depending on the requested coefficent of friction. The melting temperature is >1,850°C.

Due to the homogeneous phase constitution and a very low amount of impurities this material offers considerable advantages compared to all other (fused) mullites. Sintered Mullite is also used for different types of ceramics.

Our Zirconia (Zirconium Dioxide = ZrO₂) Sintering Bed Beads can be used in the burning process of ceramics as a substrate on the kiln furniture. The beads hinder ceramic parts to stick to the kiln furniture so that their base faces do not deform during shrinking when they are sintered. Zirconia has a melting point above 2,700°C and a density of 5.68 g/cm³.

A widely used product which finds its application mainly in cosmetics, plastics and pharmaceuticals to name a few, where it is mainly used as a lubricant and filler.

In the friction materials industry, these features make Talc an excellent functional filler that supports wear reduction in some formulations.

We can offer a number of high purity Talc grades without any detectable amounts of asbestos type minerals. Various particle sizes are available. Talc is also used as a raw material for silicate ceramics.

This is a natural, white product. For the production of TriCalcium Phosphate only fresh bones approved by the National Inspection Service for Livestock and Meat are used. TriCalcium Phosphate is obtained from crushed, degreased and degelatinized bone chips and calcined at a temperature of 1,100°C. TriCalcium Phosphate is free from organic material, chemically inert and has been obtained from Bone Ash by a special milling and sifting procedure.

TriCalcium Phosphate is used in the non-ferrous casting industry to protect the equipment, e.g. launders for mould coating and as a release agent. In the friction materials industry, it acts as mild abrasive and functional filler, as well as mild anti-corrosive.

Vermiculite is a mineral formed of certain basaltic minerals, essentially by hydrated aluminium and magnesium silicates, somewhat similar to Mica.

Vermiculite is a raw material used in friction materials due to its low abrasiveness, high thermal resistance, incombustibility and low chemical reactivity.

It is a safe alternative to replace asbestos. It can be used for the production of many different insulations, e.g. in exhausts and joints; and also as functional filler in paints. Another important application is in filters for many kinds of liquids. 

We have Crude and also Exfoliated Vermiculite qualities in different particle size distributions.

Wollastonite is a natural fibrous calcium silicate (CaSiO₃), which is used for reinforcement of composite materials, such as e.g. friction materials, ceramics, plastics and paints. It also helps to modify the friction level of brake pads and linings. 

Wollastonite is insoluble in water, diluted acids as well as hot concentrated sulfuric acid, and offers a high thermal stability. Compared with other fillers it has a relatively high hardness on the Mohs scale (4.5-5) and - depending on the purity - a density between 2.8g/cm³-3.1g/cm³.

Zirconium Aluminium Oxide, also Zirconia Toughened Alumina or ZTA in short, is a common product for the abrasive industry where it is used as one of the major cutting media. It is also used as shot-/sand-blasting media and for engineering ceramics. Zirconium Aluminium Oxide shows significantly improved toughness to the cutting grain compared to alumina grains, improving life. It is largely used in coated abrasives.

The product typically comes in two versions; one with 25% zirconia and another with 40% zirconia content. Various particle size distributions are available.

Zirconium Dioxide is a high temperature stable, mostly non-reactive material, which has its main use in the ceramics industry, where it can be typically found as a compound stabilized with e.g. yttria or calcium oxide. Further uses are in insulations as well as glass manufacturing.

In the friction materials industry, it is used as a friction stabilizer at high temperatures with added abrasive properties.

All of our grades are custom made; low radioactivity grades are also available.

A natural, mined material, which characteristics include high temperature stability as well as corrosion resistance to alkali materials and a certain abrasiveness. Its main uses include e.g. refractory products, ceramics and ceramic glazes as well as friction materials.

In the latter application, it serves as a mid-tier abrasive and friction stabilizer at higher temperatures.

Various particle size distributions are available.

Zirconium Tungstate is a rare material, which shows a negative thermal expansion coefficient. In combination with other components, which show a positive thermal expansion, it can lead to minimize overall thermal expansion of materials or even to neither expansion nor shrinkage.