High Vacuum 96% Alumina (Al2O3) Metallized Ceramic Ring for Automobile Power Battery

• Application: Aerospace, Electronics, Medical
• Material Composition: Alumina, Al2O3
• Speciality: High Insulation, High Strength, Temperature Resistant
• Working Temperture: 1500 ºC
• Color: White
• Alumina Content: 95% - 96%
• Water Absorption: 0%
• Thermal Conductivity: 25 W/M.K
• Processing Service: Moulding
• Density: 3.70 g/cm3
• Transport Package: Carton Package
• Specification: Customized
• Trademark: INNOVACERA
• Origin: Fujian, China

Product Description

High Vacuum 96% Alumina ( Al2o3 ) Metallized Ceramic Ring for Automobile Power Battery

 

Features:

1.Material: 96% Aluminia(AL2O3)
2.Coating Layer:Molybdenum-Mananese(Mo/Mn)
3.These metallized ceramics are ideal for high voltage, high vacuum and high pressure applicationos.

So far the most widely-used and effective method for creating a leak-tight, robust joint between ceramic and metal is by brazing
. A thin layer of metal deposited on a ceramic part enables brazing between ceramic and metal part that h as a different
coefficient of thermal expansion.
A layer of Molybdenum-Manganese is deposited with a typical thickness of 8 to 30 µm after sintering.
The metallized surface receives a secondary coating of nickel to seal and improve wettability for later brazing.

 

Advantages: long-term stability and reliability,The metal layer and the ceramic layer are tightly bonded, with high dimensional accuracy and high physical properties. The ceramic sealing ring is located under the battery cover plate and used to form a sealed and conductive connection between the cover plate and the pole of the power battery, so as to ensure that the battery has good sealing performance, prevent the leakage of electrolyte and provide a good closed environment for the internal reaction of the battery. At the same time, it can also play the role of decompression and buffering when the battery cover plate is pressed down,ensuring the normal operation of the internal components of the battery and ensuring the life and safe supply of the battery.

 

 

 

 

Properties		Unit	Test Method	Material
				IN94	IN96	IN99
Mechanical	Color	-	-	White	White	Ivory
	Alumina Content	%	-	94	96	99
	Bulk Density	3 g/cm	ASTM C-20-83	3.7	3.8	3.9
	Surface Roughness	Um	Profilometer	-	Max 0.6	-
	Water Absorption	%	ASTM C373-72	0	0	0
	Average Crystalline Size	Um	ASTM E112-88	4	3	4
	Flexural Strength (20ºC)	MPa	ASTM F417-78	350	370	370
	Elastic Modulus	Gpa	ASTM C773-82	290	310	340
	Poisson's Ratio	-	ASTM C773-82	0.22	0.22	0.22
	Compressive Strength	Mpa	ASTM C773-82	2100	-	2500
	Hardness	-	Knoop 1KG	12	-	14
	Fracture Toughness	Mpa.m1/2	NOCHED BEAM	3.4	-	4.5
Thermal	Thermal Conductivity (20ºC)	W/m.K	ASTM C408-82	21	24	28
	Coefficient of Thermal Expansion(20~1000ºC)	x10-6/ºC	ASTM C372-81	8	7.8	8.1
	Specifc Heat	Cal/gºC	ASTM C351-82	0.2	0.2	0.2
	Thermal Shock Resistance	ºC	Customer	200	200	200
	Max. Use Temperature	ºC	-	1600	1600	1650
Electrical	Dielectric Strength	KV/mm	ASTM D116-76	≥12	≥15	≥17
	Dielectric Constance (1MHz.25ºC)	-	ASTM D150-81	9.2	9.6	9.7
	Dielectric Loss (tan delta, 1MHz.25ºC)	-	ASTM D150-81	0.0004	0.0003	0.0002
	Volume Resistivity (25ºC)	Ωcm2/cm	ASTM D1829-68	≥10 14	≥10 14	≥10 14