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.