Alumina Ceramic (Aluminum Oxide）Description:

Alumina is a ceramic material with high thermal conductivity, compressive strength, and thermal shock resistance. It also has a low thermal expansion, making it a suitable material for furnace use in crucible, tube, and thermocouple sheath form.

 Alumina is high hardness and good wear resistance, making it a suitable material for ball valves, piston pumps, and deep drawing tools. In addition, it can be easily combined with metals and other ceramic materials using brazing techniques and metallizing.

Alumina crucibles can be used under high temperature and do not contaminate most melten metals.

 

Alumina Ceramic Applications:

• Used for equipment parts, solar parts, semiconductor parts.

• In traditional industries, alumina ceramics are ideal for products such as injector tubes, gas nozzles and insulators.

• Used as a material for industrial furnaces due to its ability to maintain its hardness at high temperatures.

• Used as protector for high temperature thermal couples.

• Used as a material for chemical industry due to its high corrosion resistance.

Typical properties for common materials of alumina plates

Composition	UNIT	Alumina 95%	Alumina 99.5%	Alumina 99.8%
AL2O3  content	%	96	99.5	99.8
Color		White	Ivory	Ivory
Tensile strength	Kpsi	32	38	36
Flexural strength	Kpsi	52	55	54
Compressive strength	Kpsi	300	377	350
Density	g/cc	3.70	3.90	3.92
Hardness	HV, GPa	13.8	17.2	18
Thermal Conductivity	W/(m K)	25	30	30
Coefficient of thermal expansion	In / In°C (x10^-6)	7.7	7.8	7.8
Working temperature	°C	1500	1650	1750
Dielectric Constant		9.5	9.7	9.8
Volume Resistivity (25°C)	Ohm-cm	>10^14	>10^14	>10^14