Aluminum oxide ceramic (A203) is a highly wear-resistant precision ceramic material widely used in various industries. The main molding methods for alumina ceramic products include dry pressing, isostatic pressing, injection molding, and casting. Different product shapes, sizes, complex shapes, and precision require different molding methods.

Aluminum oxide ceramics have excellent high-temperature properties and high mechanical strength, and are widely used in many industrial fields such as metallurgy, machinery, chemical industry, electronics, aviation, and national defense. Its main uses include:

1. Aluminum oxide ceramics have properties such as high temperature resistance, corrosion resistance, and high strength, so they are used as sliding nozzles for pouring steel, crucibles and vessels for smelting rare and precious metals, special alloys, high-purity metals, and glass wire drawing; Various high-temperature furnaces, such as refractory materials, ceramics, and the lining (walls and pipes) of ironmaking blast furnaces; Physicochemical vessels, spark plugs, heat-resistant and antioxidant coatings. Low silicon sintered corundum bricks with SiO2 less than 0.5% are specialized furnace linings for carbon black, boron chemical, fertilizer, synthetic ammonia reaction furnaces, and vaporization furnaces.

2. Aluminum oxide ceramics have the characteristics of high hardness, good wear resistance, and high strength. In chemical systems, they are used as components for various reactors, pipelines, and chemical pumps; Produce mechanical components and various molds, such as wire drawing dies, pencil lead extrusion dies, and nozzles; Used as cutting tools, abrasive tools, bulletproof materials, human joints, sealing grinding rings, etc;

3. Aluminum oxide ceramics also have high-temperature insulation properties, so they are used as wire sleeves and protective tubes for thermocouples. The insulation properties used in atomic reactors are still excellent, coupled with low losses and low dielectric constants. They are widely used in the electronic industry for solid integrated electric furnace substrate tube seats, shells, ceramic frames, thin windows, missile radar antenna protective covers, etc;

4. Aluminum oxide is an ionic crystal with a very stable structure. When used at high frequency, high voltage, and high temperature, its insulation performance is still excellent, coupled with low loss and low dielectric constant. It is widely used in the electronic industry for solid extruded circuit substrate sockets, casings, ceramic frames, micro glass windows, missile radar antenna protective covers, etc;

5. Aluminum oxide ceramic products have good airtightness and are tightly airtight even at high temperatures, making them widely used in the electrical field;

6. Aluminum oxide ceramic insulation materials are widely used in the walls and roofs of various high-temperature furnaces, which are both heat-resistant and insulated.

The advantages of alumina ceramics

✔ High wear resistance

Aluminum oxide ceramics have wear resistance, but their hardness is the same as that of corundum, reaching a Mohs hardness of 9, and their wear resistance can rival that of superhard alloys.

✔ Good insulation

Aluminum oxide ceramics have excellent insulation properties, with relatively low high-frequency losses but good high-frequency insulation properties;

✔ High heat resistance

Aluminum oxide ceramics have the characteristics of heat resistance, low coefficient of thermal expansion, high mechanical strength, and good thermal conductivity;

✔ Chemical corrosion resistance

Aluminum oxide ceramics have characteristics such as chemical corrosion resistance and molten metal properties;

✔ Excellent characteristics

Aluminum oxide ceramics have the characteristics of non flammability, rust resistance, and non susceptibility to damage, making them excellent properties that are incomparable to other organic and metal materials;