High purity 99 Al2O3 ceramic insulator

High purity 99 Al2O3 ceramic insulator 1. factory owner 2. high strength 3. resistance to wear 4. electrical insulating

Ceramic insulators are used when electrical insulation is necessary in high heat applications. This makes them useful for supporting electric heating elements in ovens, heaters and furnaces.

 

Ceramics hold their shape and size under pressure. This is important in switching applications where the ceramic is used to open and close electrical contacts in a thermostat or pressure switch.

 

Ceramic parts are very abrasion resistant and offer long life in applications where other materials would wear out quickly.

 

1. Advanced ceramics - Change the world!

low densityhigh hardnesshigh mechanical strengthdimensional stability (specific stiffness)resistance to wearresistance to corrosion (resistance to chemical attack)weathering resistancehigh working temperaturelow or high thermal conductivitygood electrical insulationdielectric and ferroelectric properties2. The properties of the most popular used material Alumina Al2O3 Alumina (Al2O3) is a hard, chemically resistant material and has the ability to withstand very high temperatures in aggressive environments. Innovacera offers Alumina with various purity levels, including 99.8% and 99.0%. The level of purity, grain size, and density required is dependent on the rigors of the application and the component configuration. 

Item	Test Condition	Unit&Symbol	95% Al2O3	99% Al2O3	99.7% Al2O3
The main chemical ingredient			Al2O3	Al2O3	Al2O3
Bulk Density		g/cm3	3.6	3.89	3.96
Maximum Use Temperature			1450°C	1600°C	1650°C
Water absorption		%	0	0	0
ROHS Hardness			≥85	≥89	≥89
Flexural strength	20° C	MPa (psi x 103)	358 (52)	550	550
Compressive Strength	20° C	MPa (psi x 103)	2068 (300)	2600(377)	2600(377)
Fracture Toughness	K(I c)	Mpa m1/2	4 - 5	5.6	6
Coefficient of thermal expansion	25-1000° C	1X 10-6/°C	7.6	7.9	8.2
Coefficient of thermal conductivity	20° C	W/m °K	16	30	30.4
Thermal Shock Resistance	Tc	°C	250	200	200
Dielectricity constant	1MHz.25°C		9	9.7	9.7
Dielectric strength		ac-kV/mm (ac V/mil)	8.3 (210)	8.7 (220)	8.7 (220)
Volume Resistivity	100°C	ohm-cm	> 1013	> 1014	> 1014

High purity 99 Al2O3 ceramic insulator