metallized Ceramics1

metallized ceramics： metallized ceramics is coated with a metal film (molybdenum manganese tungsten silver etc.) on the surface of ceramics which is sintered in a metallized high-temperature furnace to achieve a firm combination of c

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Metallized ceramics is coated witha metal film (molybdenum, manganese, tungsten, silver, etc.) on the surface of ceramics, which is sintered in a metallized high-temperature furnace to achieve a firm combination of ceramics and metals. At present, the company has thick film method, film method, activation method and other processes, can achieve 95%-99.7% alumina ceramics, aluminum nitride ceramics, beryllium ceramics, sapphire, diamond and other surface metallization.

Item		Unit
Item		Unit	A-95	A-75	MS-1
Bulk Density	ambient temperatures	g/cm³	≥3.64	≥3.2	≥2.7
Helium Leak Rate(Tightness)		pa.m3/s	≤1×10 ^-11	——	——
Flexural Strength	ambient temperatures	Mpa	336.1	280	160
Average Linear Expansion Coefficient	（20~500）℃	1/℃	7.27×10^-6	6.21×10^-6	8.48×10^-6
Average Linear Expansion Coefficient	（20~800）℃	1/℃	7.73×10^-6	——	——
Dielectric Constant	Mhz20℃		9.4	8.7	7.5
Volume Resistivity	100℃	Ω.cm	5.2×10^15	4.5×10^13	3.7×10^13
	300℃		5.6×10^14	——	——
	500℃		4.8×10^13	——	——
Dielectric Loss	20℃		2.4×10^-4	≤10×10^-4	≤8×10^-4
DC Breakdown Strength		KV/mm	42.0	34	28
Thermal Stability	ambient temperatures~800℃		通过pass	——	——
Chemical Stability	10%HCI	Mg	4.657	——	——
Chemical Stability	1:9NaOH	Mg	0.075	——	——

	Area	Gauge length	Maximum load	Maximum stress
Unit	mm2	mm	kN	MPa
1	122.0000	100.0000	13.1016	107.390
2	122.0000	100.0000	16.9062	138.576
3	122.0000	100.0000	13.1273	107.601
4	122.0000	100.0000	14.4523	118.462
5	122.0000	100.0000	12.2820	100.672
6	122.0000	100.0000	13.2656	108.735
7	122.0000	100.0000	13.8773	113.749
8	122.0000	100.0000	17.4781	143.263
Average value			14.3113	117.306

SEM image of metallized layer was enlarged by 4000 times SEM image of ceramic part enlarged by 500 times