MR16 GU10 Ceramic Base lamp base

MR16 GU10 Ceramic Base  lamp base

Name	Unit	Alumina			Zirconia
Content	%	95	99	99.7	94
Density	g/cm3	3.65	3.80	3.90	6.00
Hardness (Hv0.5)	GPa	13.1	15.0	17.1	13.2
flexural strength	MPa¡Ý	340	310	370	1000
Elasticity	GPa	300	330	350	200
Poisson's ratio		0.23	0.23	0.23	0.30
Max Tem.	¡ãC¡Ý	1400	1750	1800	1050
Heat expansion	¡Á10-6/¡ãC(40-800¡ãC)	7.8	8.0	8.0	11.0
Thermo conductivity	W/m¡¤K( 20¡ãC)	22	28	31	2.6
Thermal Resistance	¡ãC	200	200	230	300
dielectric strength	V/m	15¡Á106	15¡Á106	15¡Á106	11¡Á106
dielectric phase angle  (1MHz)	¡Á10-4	4	2	1	16
SIC(1MHz)		9.2	9.8	9.9	33
Nitric Acid  (60%)90¡ãC	WT Loss mg/cm2/day¡Ü	0.12	0.10	0.05	¡Ù0
Sodium hudroxide  (30%)80¡ãC	WT Loss mg/cm2/day¡Ü	0.53	0.26	0.04	0.08