Alumina

High melting point, high thermal strength, high hardness and good thermal stability. Adding aluminum oxide into friction materials can effectively improve the friction coefficient at room temperature and high temperature, and has certain effect on reducing the cracking of friction plates caused by heat decay. The amount of aluminum oxide added in the specific formula should not be too much, which is generally controlled within 3% and more than 325 mesh to avoid increased wear and damage to the dual.

Chrome oxide green

Also known as chromium trioxide and chromium oxide, with molecular weight of 151.99. It is hexagonal crystal and green powder. It is insoluble in water, acid and organic solvent, slightly soluble in concentrated sodium hydroxide solution, soluble in hot sodium bromate solution, hot concentrated perchloric acid solution or boiling mixed acid of sulfur and phosphorus. It is extremely stable to light, atmosphere and corrosive gases (H2S, SO2, etc.) and has excellent weather resistance. Stable in case of heat, with melting point of 2265 ℃ and boiling point of 3000 ℃, it is a high-quality refractory material. It is used for smelting metal chromium and chromium carbide, coloring of enamel, ceramics, glass, artificial leather, refractory materials, building materials, catalysts for organic synthesis, special inks for manufacturing light-resistant materials and printing paper money, metal polishing abrasive materials, metal surface chromizing, magnetic materials, etc. Used in coatings, ceramics, rubber, art pigments, and camouflage coatings.

Wollastonite cotton

There are two kinds of wollastonite: needle-shaped wollastonite cotton and wollastonite powder. The needle-shaped wollastonite cotton is resistant to acid and alkali chemical corrosion. Its length-diameter range is 18:1 to 20:1, which has a strengthening effect. The strengthening effect increases with the increase of the length-diameter ratio. Wollastonite powder belongs to calcareous metasilicate minerals, which has a good friction increasing effect. Wollastonite cotton is equivalent to Grade 6 asbestos reinforcement effect in non-asbestos products. Wollastonite cotton and a small amount of fibers with good strength have sufficient friction material products, so it has been widely used by many friction material factories and companies.

Calcined Petroleum Coke

Its characteristics meet the technical indicators of foreign imported products: (1) Small specific gravity, loose texture, porous. (2) It has high carbon content, low volatile and stable physical and chemical properties. (3) With reference to foreign data and product processing and manufacturing, and through strict screening, it has a fixed particle size composition suitable for the application of friction materials. The application of petroleum coke in friction materials can reduce the specific gravity (density) of the product, improve the porosity and compression performance of the product, thus stabilizing the friction performance, improving the brake comfort and process performance, and reducing the brake noise. Recommended dosage: disc brake pad 6-8% drum brake pad 8-12% Eyes: Our company can provide suitable eyes according to the requirements of the demander

Precipitated barium sulfate

Barium sulfate used in the friction material industry is mostly BaSO4 with a content of about 95%. Barium sulfate is a chemically synthesized product, which is made from soluble barium salt and sulfuric acid through repeated decomposition and reaction. Even though it does not contain mineral impurities such as silicon dioxide, it is still often used in products with high friction and brake noise, such as disc brake shoes, which are synthesized by trains, and the brake shoes are conducive to reducing brake noise.