Specifications

Diameter 20mm alumina ceramic insulator tubes
1.High temperature
2.Good insulation
3.High strength
4.Precision Process

Productive  Technology:

  Alumina ceramic is the special corundum ceramic that been sintered under 1800 °C with the  

  main raw material of Al2O3 and flux of rare metal oxide.Using the high strength organic/inorganic 

  bond to felt together, and then grinding to the size as drawing required.

 

Advantages:

   1.High temperature

   2.Good insulation

   3.High strength

   4.Precision Process

 

 

Alumina Ceramics Properties
Alumina Content	Unit	95%	99%
Density	g/cm3	3.6	3.8
Water absorption	%	<0.4	<0.2
Firing temperature	°C	1600	1800
Hardness	HRA	70	80
Coefficient of linear expansion	*10-6/°C	5.5	5.3
Dielectric constant		9	10.5
Volume resistivity	Ω·cm	—	1013
Breakdown voltage	KV/mm	14	15
Breaking strength	Mpa	250	300