Ceramic Contact Block

Specifications Ceramic Contact Block

1.Material: alumina ceramic

2.Purpose:used as part

3.RoHS

Ceramic Contact Block   These items have wear-resistance,shock resistance,and convenient construction ect.They are wear-resisting and ideal material for material transportation equipment in industry such as petroleum,mine,steelworks,electric plant.And they can prolong the using cycle of equipment effectively.   Gongtao company can make special various wear-resistance parts based on the requirement and drawing.     Property index:  

Item	Testing condition	Unit	75% al2o3	90% al2o3	95% al2o3	99% al2o3	99.5% al2o3	zirconia	steatite
Bulk density		g/cm3	>3.20	>3.40	>3.60	3.7	3.7	6	≥2.6
Flexural Strength		N/m2×103	1.96	2.25	2.24	>2.24	>2.74	11	1.37
Coefficient of linear expansion	20~800°C	×10-6/°C	/	6.3~7.3	6.5~8.0	6.5~8.0	6.5~8.0	9.5	≤8
Permittivity	1MHz		≤9	8.5~9.5	9~10	9~10.5	9~10.5	/	≤7.5
	10GHz		/	/	9~10	9~10.5	/	/	/
Insertion loss	1MHz	×10-6	≤10	≤8	≤4	≤2.5	≤1.5	/	≤8.0
	10GHz	×10-6	/	/	≤10	≤6	/	/	/
Bulk density resistance	100°C	Ω·Cm	>1012	>1013	>1013	>1013	>1014	>1012	>1012
Puncture strength		KV/mm	20	15	15	15	/	/	20
Thermal conductivity	20°C	W/m·k	/	16.8	25.2	25.2	29.2	3	2.9