high ceramic insulator /Alumina Electrical Ceramics/ seamark

Specifications electrical ceramics

Excellent wear and abrasion resistance.

High dielectric properties

high hardness

high ceramic insulator /Alumina Electrical Ceramics/ seamark Material: 95 or 99 alumina ceramic Density: 3.6 or 3.92 g/cm3   We can supply the products according to customer's drawings, samples and performance requirement.  Electronical Alumina ceramic part with below property: 1.high mechanical strength 2.High temperature, Max working temperature: 1700C. 3.good electrical insulation 4.Good chemical corrosion resistance under high temperature. 5.Excellent wear and abrasion resistance 6.Very hardness and Excellent thermal shock 7.Low dielectric loss, high insulation.   Technical Parameter of Alumina.

Material	——	AI-920	AI-950	AI-990	AI-997	AI-999
Texture	——	Al2O3	Al2O3	Al2O3	Al2O3	Al2O3
		>92%	>95%	>99%	>99.7%	>99.9%
Density	g/cm³	3.45	3.50	3.75	3.90	3.92
Bending strength	Mpa	340	300	330	390	390
Compressive strength	Mpa	3600	3400	3800	3900	3900
Elasticity modulus	Gpa	350	350	370	390	390
Impact resistance	Mpam½	4.2	4.0	4.4	5.2	5.5
Weibull Modulus	m	11	10	10	12	12
Vickers Hardness	HV 0.5	1700	1800	1800	2000	2000
Thermal expansion	10^-6K^-1	5.0-8.3	5.0-8.3	5.1-8.3	5.5-8.4	5.5-8.5
Thermal Conductivity	W/mk	18	24	25	28	30
Thermal shock resistance	°C	220	250	250	280	280
Highest Application Temperature	°C	1500	1600	1600	1700	1700

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