ST.CERA CO., LTD. Material Data Sheet

Properties	Unit	Alumina (Al2O3)
		99% Al2O3	99.5% Al2O3	99.8% Al2O3	99.9% Al2O3
Color	—	White	Ivory	Ivory	Ivory
Density	g/cm3	3.88	3.90	3.93	3.95
Water Absorption	%	0	0	0	0
Grain Size	μm	2~5	2~5	2~5	2~4
Flexural Strength	MPa	350	360	361	350
Fracture Toughness	MPa·m1/2	3~4	3~4	3~4	3~4
Vickers Hardness	GPa	14	15.5	16	16
Young' s Elastic Modulus	GPa	370	370	380	390
Thermal Conductivity	W/m·k	28	32	32	34
Thermal Expansion Coefficient	10-6/℃	7.2	7.2	7.2	7.2
Dielectric Constant	—	9.5	9.6	9.6	9.9
Dielectric Loss Angle	—	0.0001	0.0001	0.0001	0.0001
Dielectric Strength	V/m	15×106	15×106	15×106	15×106
Specific Resistance	Ω ·mm2/m	﹥ 1014	﹥ 1014	﹥ 1014	﹥ 1014

With features of high temperature resistance, corrosion resistance, abrasion resistance and insulation, ceramic can work in many kinds of semiconductor production equipment with condition of high temperature, vacuum or corrosive gas for a long time. Made from high-purity alumina powder, processed by cold isostatic pressing, high temperature sintering and precision finishing, it could reach the dimension tolerance to ±0.001 mm, surface finish Ra 0.1, temperature resistance 1600℃. Here is the characteristics of alumina ceramic with different purity.Spray Granulation → Ceramic Powder → Forming → Blank Sintering → Rough grinding → CNC Machining → Fine Grinding → Dimension Inspection → Cleaning PackingPlace of Origin: Hunan, China Material: Alumina Ceramic HS Code: 85471000 Supply Ability: 200 pcs per month Lead time: 3-4 weeks Package: Corrugated box, foam, carton Others: Customization service available