XTL Laser Scribing Al2O3 Alumina Ceramic Substrate for Chip Resistor

Test item		alumina
index	unit	AL997	AL99	AL95
Principal component content	/	99.70%	99%	95%
Couleur	/	ivory white	ivory yellow	White
Gas permeability	/	airtight
density	g/cm³	3.9	3.8	3.7
hardness	Moh’s hardness	9	8.8
Water Absorption	/	≤0.2
Bending strength (20°C)	Mpa	375	340	304
Compressive Strength (20°C)	Mpa	2300	2210	1910
Coefficient of thermal expansion (25°C to 800° C)	10X6/° C	7.6
Insulation strength (5mm thickness)	AC-kv/mm	10
Dielectric loss 25°C lMHz	/	v0.0001	0.0006	0.0004
dielectric constant 25°C MHz	/	9.8	9.5	9.2
Volume resistivity (20°C) (300°C) (500 °C)	Ω.cm3	>1014	>1014
Volume resistivity (20°C) (300°C) (500 °C)	2X1012	Ω.cm3