White aluminum oxide, thanks to its physical and chemical properties, including high hardness, excellent high-temperature stability, chemical inertness, and good insulation, has become an indispensable material in numerous industrial fields.
White aluminum oxide is used in grinding, surface treatment, refractory materials, chemical electronics, and high-end manufacturing. The following summarizes its core applications and technical features, combining its properties with actual industrial needs:
01 Grinding and Precision Machining
1. Metal Grinding
Due to its high hardness and sharp micro-cutting edge, white aluminum oxide grinding wheels are particularly suitable for efficiently removing surface oxide and work-hardened layers from hard materials such as stainless steel, high-speed steel, and high-carbon steel.
2. Non-metallic Material Grinding
Used for fine polishing of glass, ceramics, and stone, such as the mirror finish on mobile phone back glass.
3. Grinding Tool Manufacturing
White aluminum oxide is used as a core abrasive in the manufacture of grinding tools such as grinding wheels, sandpaper, and cutting discs. It is suitable for both rough grinding and fine polishing of workpieces such as automotive engine blocks and aerospace aluminum alloy components.
02 Surface Treatment Technology
1. Sandblasting
White aluminum oxide utilizes its high hardness and uniform particle size to effectively remove stubborn stains and rust from metal surfaces (such as scale on cast iron parts and welds) and non-metallic surfaces, significantly improving the adhesion of subsequent coatings (such as paint and electroplating). It is widely used in automotive sheet metal repair, ship maintenance, and steel structure pretreatment.
2. Polishing and Beautification
Fine-grained white aluminum oxide is used for surface polishing of jewelry, precision hardware, medical devices, and other products, typically without the need for additional chemical cleaning.
03 Patience and Insulation
1. High-Temperature Furnace Components
White fused alumina is used as the primary raw material in the manufacture of high-grade refractory materials such as corundum bricks and corundum castables. These materials are used in the linings of metallurgical furnaces (such as blast furnaces and ladles). They offer temperature resistance exceeding 1800°C, excellent thermal shock resistance, and can reduce heat loss by 15%-20%.
Processed into lightweight insulating bricks, white fused alumina are used in thermal equipment such as glass melting furnaces, achieving significant energy savings.
2. Industrial Equipment Protection
White fused alumina is used as a protective layer in key areas such as cement rotary kiln linings and power plant boiler fire zones. It effectively resists corrosion from high-temperature acidic and alkaline gases, significantly extending equipment service life by 1-5 years.
04 Other high-end applications
1. Aerospace
Used for manufacturing high-temperature, oxidation-resistant coatings for engine hot-end components (such as turbine blades), helping to improve the engine's thrust-to-weight ratio and reliability.
2. Water Jet Cutting
Added as an abrasive to a high-pressure water jet, white fused alumina is used to cut high-hardness metal sheets (such as titanium alloys and high-strength steel) and composite materials, achieving cutting accuracy of up to ±0.1mm. It is widely used in the machining of complex aerospace components.
3. Precision Engraving
White fused alumina replaces traditional pickling processes and is used for fine etching and engraving of hard and brittle materials such as agate and jade. The process is environmentally friendly and pollution-free.
