Aluminous porcelain (AP): What is Aluminous porcelain (AP)?

Aluminous porcelain is a ceramic material that is used to make protection sheaths, insulators and fish spine beads for temperature sensors. It is also called Pythagoras or Alumina. Aluminous porcelain is very commonly used because it has a good thermal shock resistance, chemical resistance and mechanical strength.


Basic Composition: Al 2O 3 60%
Temperature Limits: 1500 ° C
International Standards: DIN VDE 0335 C610
Density: 2.6 g/cm³
Coefficient of Expansion: 6 x10-6 / ° C
Thermal Conductivity: 2 W/m ° C

When a temperature sensor is in use above 1500 ° C recrystallised alumina is used as it can work up to 1750 ° C.