High Frequency Insulating Electronic Ceramic Surface Metallization Alumina Electroceramic Vacuum Components

Product Description

High Frequency Insulating Electronic Ceramic Surface Metallization Alumina Electroceramic Vacuum Components
 

Product Introduction

Introduction to Metallization Technology

Ceramic surface metallization is a surface treatment process that can effectively improve the properties of ceramic materials. It aims to form a uniform and dense metal film on the surface of ceramic parts to improve its surface properties, such as electrical conductivity, corrosion resistance, and giving it connectivity with metals. This technology is widely used in power electronics and new energy vehicles.
 

 

Product Parameters

The most common ceramic material used in metallization processes is alumina ceramic. Below is the data sheet of our alumina ceramic materials.
 

Category	Property	Unit	99.8% Al2O3	99.5% Al2O3	99% Al2O3	95% Al2O3	94.4% Al2O3
Mechanical	Density	g/cm^3	≥3.95	≥3.90	≥3.85	≥3.65	≥3.60
	Water absorption	%	0	0	0	0	0
	Vickers hardness	HV	1700	1700	1700	1500	1500
	Flexural strength	Mpa	≥ 390	≥ 379	≥ 338	≥ 320	≥ 312
	Compressive strength	Mpa	≥ 2650	≥ 2240	≥ 2240	≥ 2000	≥ 2000
	Fracture toughness	Mpam^1/2	4-5	4-5	4-5	3-4	3-4
Thermal	Max. Service temperature (non-loading)	ºC	1750	1675	1600	1500	1500
	CTE (Coefficient of thermal expansion) 20-800ºC	1×10^-6/ºC	6.5-8.2	6.5-8.0	6.2-8.0	5.0-8.0	5.0-8.0
	Thermal shock	T (ºC)	≥ 200	≥ 200	≥ 200	≥ 220	≥ 220
	Thermal conductivity 25ºC	W/(m·k)	31	30	29	24	22.4
	Specific heat	1×10^3J/(kg·k)	0.78	0.78	0.78	0.78	0.78
Electrical	Volume resistivity 25ºC	ohm·cm	> 1×10^14	> 1×10^14	> 1×10^14	> 1×10^14	> 1×10^14
	300ºC		1×10^12	1×10^12	8×10^11	10^12-10^13	10^12-10^13
	500ºC		2×10^12	5×10^10	2×10^9	1×10^9	1×10^9
	Dielectric strength	KV/mm	20	19	18	18	18
	Dielectric constant (1Mhz)	(E)	9.8	9.7	9.5	9.5	9.5

 

Product Applications

Application Examples

1. Ceramic feedthroughs
Ceramic feedthrough is a sealing device that can pass through the wall of the vacuum chamber and transmit various electric power and electric signals from the atmosphere to the inside of the vacuum chamber. It is widely used in electric vacuum devices.


2. Vacuum interrupters
The vacuum interrupter is a core component of a new type of high-performance medium and high voltage power switch. Through the insulation of the vacuum in the tube, the medium and high voltage circuit can quickly extinguish the arc and suppress the current after the power is cut off, thereby achieving the function of safely turning on/off the circuit and controlling the power grid.


3. Ceramic relays
Ceramic relay is a relay sealed with ceramic vacuum. Its contact points are sealed and isolated from the outside air to obtain high voltage resistance. It is often used in the field of new energy vehicles and high-frequency circuits.
 

Company Profile

Jinghui Ceramic is a professional manufacturer of metallized ceramics and has a complete and scientific quality management system. We strive for excellence in product quality, and high quality is our original intention.

1. Every detail is in place
Our products are well-detailed, have high surface finish and stable performance.

2. Quality control
Using testing equipment and manual screening to ensure that products reach customers without quality problems.

3. Technical support
We can customize as per customer requirements and can provide customers with reference solutions.

4. Fast shipping
The use of mechanized automatic production effectively improves production efficiency while saving labor costs.