White corundum (WA)is a white artificial abrasive made of high-quality alumina as the main raw material, which is melted and crystallized at high temperature in an electric arc furnace. Its main component is α-alumina (Al₂O₃), with a purity of more than 99%. It has significant advantages such as high hardness, good toughness, strong self-sharpening, uniform particles, good thermal stability, and few impurities. It is widely used in grinding and polishing processes in modern manufacturing.
In the polishing process, white corundum is widely used in the surface treatment of various materials such as metals, glass, ceramics, optical devices, and electronic chips due to its excellent physical and chemical properties. It plays an irreplaceable role in industries with high requirements for surface flatness, finish and cleanliness.
1. Surface polishing of metal materialsWhite corundum can be effectively used for surface polishing of metals such as stainless steel, aluminum alloy, titanium alloy, and copper. It has high hardness and strong cutting force, and can quickly remove surface oxide scale, welding spots, oil stains and tiny burrs, making the surface of the workpiece smoother and smoother. At the same time, its particles are pure and it is not easy to produce metal pollution during the polishing process. It is widely used in surface treatment processes in the fields of kitchenware, precision machinery parts, hardware products, metal casings, etc.
2. Fine polishing of non-metallic materials such as glass and ceramicsFor brittle non-metallic materials such as glass and ceramics, white corundum has excellent processing adaptability. On the premise of ensuring the integrity of the workpiece structure, white corundum can achieve efficient and uniform removal and polishing, improve the transparency, finish and visual texture of the material, and is suitable for fine surface treatment of architectural glass, ceramic ornaments, crafts and ceramic substrates.
3. Ultra-fine polishing of precision molds and optical devicesIn the manufacturing process of high-end products such as precision molds, optical lenses, laser devices, etc., there are extremely high requirements for polishing accuracy, surface quality and cleanliness. Micro-powder-grade white corundum (such as F800, F1200, W3.5, etc.) has excellent particle uniformity and cutting stability, and can achieve mirror-level surface effects without causing scratches. It is widely used in terminal polishing in mold manufacturing, optical glass, LED lenses and other fields.
4. Application in semiconductor and electronics industryIn the processing of electronic materials such as semiconductor wafers, sapphire substrates, and silicon carbide substrates, white corundum has become the preferred abrasive in the polishing process of many electronic components due to its high purity, low impurity content, and low residue. Its stable particle morphology and excellent cutting force help to achieve efficient processing and low defect rate, thereby improving product yield and consistency.
SummaryAs a polishing abrasive with stable performance, environmental protection and high efficiency, white corundum plays an important role in metal processing, glass ceramics, precision molds, electronic optics and other fields with itshigh purity, high hardness, good cutting performance and wide applicability. In the future, with the development of intelligent manufacturing and high-end manufacturing, the requirements for the precision and efficiency of surface treatment will continue to increase, and the application prospects of white corundum will be broader.
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