The difference between high aluminum porcelain and low aluminum porcelain

1. Alumina content

High aluminum porcelain: alumina content is usually more than 75%, common 85%, 95%, 99% and other high purity ceramics.

Low aluminum porcelain: alumina content is usually between 30% and 75%, common 45%, 60% and so on.

2. Physical properties

hardness

High aluminum porcelain: higher hardness, better wear resistance.

Low aluminum porcelain: low hardness, relatively poor wear resistance.

density

High aluminum porcelain: higher density, more dense structure.

Low aluminum porcelain: low density, relatively loose structure.

intensity

High aluminum porcelain: higher mechanical strength, better bending strength and compressive strength.

Low aluminum porcelain: low mechanical strength.

3. Thermal performance

High temperature resistance

High aluminum porcelain: excellent high temperature resistance, can be used in high temperature environment above 1600℃.

Low aluminum porcelain: poor high temperature resistance, usually suitable for 1200℃ below the environment.

Thermal shock stability

High aluminum porcelain: thermal shock stability is better, but not as good as low aluminum porcelain.

Low aluminum porcelain: better thermal shock stability, suitable for large temperature change environment.

4. Electrical properties

insulativity

High aluminum porcelain: excellent electrical insulation, suitable for high frequency, high pressure environment.

Low aluminum porcelain: electrical insulation performance is better, but not as good as high aluminum porcelain.

5. Chemical properties

Corrosion resistance

High aluminum porcelain: acid, alkali corrosion resistance is stronger.

Low aluminum porcelain: poor corrosion resistance, but in the general environment can still meet the demand.

6. Processing performance

Processing difficulty

High aluminum porcelain: high hardness, difficult processing, high cost.

Low aluminum porcelain: processing is relatively easy and the cost is low.

7. Cost

High aluminum porcelain: high raw material purity, complex production process, high cost.

Low aluminum porcelain: raw material purity is low, the production process is simple, and the cost is low.

8. Application field

High alumina porcelain

Electronics industry: insulators, substrates, packaging materials.

Machinery industry: wear-resistant parts, cutting tools.

Chemical industry: corrosion resistant pump valve, reactor lining.

Aerospace: High-temperature components, thermal protection materials.

Low-alumina porcelain

Construction industry: ceramic tile, sanitary ware.

Daily necessities: tableware, decorations.

General industry: refractory materials, insulation parts.