There are many types of abrasives, and their classification is generally divided according to its hardness. The highest hardness is diamond, there are two kinds of synthetic diamond and natural diamond; followed by carbides, such as black silicon carbide, green silicon carbide, boron carbide and carbon silicon boron; again, corundum with higher hardness, such as brown fused alumina , white corundum, single crystal corundum, chrome corundum, microcrystalline corundum, black corundum, zirconium corundum and sintered corundum; the lowest hardness oxides (also known as high quality chemical abrasives), with chromium oxide, iron oxide, magnesium oxide and oxidation Hey. The following Ceramic Grinding Abrasive manufacturers share the common categories of abrasives.
Boron carbide is a compound obtained by melting a mixture of industrial boric acid and low ash carbon raw material (petroleum coke). The hardness of boron carbide is second only to diamond. The pulverized abrasive grains are almost equal in shape and have sharp edge tips. They are similar to diamond in cutting ability. Because they are cheaper than diamonds, they are often used as substitute abrasives for diamonds. use. Boron carbide is mainly used for grinding workpieces made of cemented carbide, hardened steel, optical glass and gemstone materials, and is particularly suitable for coarse grinding operations with large margins.
Silicon carbide is divided into black silicon carbide and green silicon carbide, which is obtained by heating silica and carbon in an electric resistance furnace. Silicon carbide has good thermal conductivity and a low coefficient of thermal expansion. Compared with green silicon carbide, black silicon carbide has high hardness and low toughness. In addition, they can also be distinguished according to their color, for example, black with a silicon carbide content of 96 to 99%; green with a silicon carbide content of 99% or more. Black silicon carbide is mostly used for grinding brass castings, bronze castings, aluminum castings, castings, marble, granite, ceramics and glass. Green silicon carbide is mostly used for grinding hard alloys and hardened steels.
Chromium oxide is prepared by calcining potassium chromate and sulfur. It is mainly used for the final processing of precision surfaces, especially for the final lapping and polishing of hardened steel parts, such as the polishing of micrometer proofing columns and Morse cone gauges. In practice, in order to improve the cutting ability of chromium oxide to achieve the best process effect, the paste prepared by blending W1~W2 white corundum powder and an appropriate amount of stearic acid is often used for processing.
Iron oxide is a very fine polishing agent that is often used to polish hard and brittle workpieces, such as fine polishing of optical flat and optical glass lenses.
Magnesium oxide and cerium oxide are good polishing agents and are mainly used for polishing hard and brittle materials such as glass and monocrystalline silicon wafers.
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