High Current Insulating Aluminium Oxid Ceramic Vacuum Interrupter Tube

• Customization: Available
• Application: Automotive Industry, Electrical Industry, Electronic Industry, Refractory, Structure Ceramic, Industrial Ceramic, Brazing
• Electrical Insulation: High Voltage Insulator
• Model NO.: Customized
• Material: Alumina Ceramic, Alumina Ceramic
• Shape: Custom Shape
• Product Name: Vacuum Interrupter Tube
• Optional Purity: 94.4%-99.8% Alumina
• Color: White, Beige, Pink
• Further Finishing Treatment: Machining, Glazing, etc
• Surface Metallization Process: Mo-Mn Method
• Feature: High Performance and High Precision
• Type: Ceramic Parts
• Transport Package: Vacuum Packaging
• Specification: As per the drawing
• Trademark: JingHui
• Origin: China
• HS Code: 8547100000
• Production Capacity: 50000PCS/Month

Product Description

High Current Insulating Aluminium Oxid Ceramic Vacuum Interrupter Tube
 

What is Wear-resistant Ceramics?

Wear-resistant ceramics refer to engineering ceramics used for wear-resistant applications. Generally, there are alumina ceramics, zirconia ceramics, silicon carbide ceramics, and silicon nitride ceramics. Alumina ceramics and silicon carbide ceramics are commonly used.

Properties of Alumina Wear-resistant Ceramics

· Ultra-high hardness, able to resist various forms of wear;
· Very good wear resistance, longer life in long-term use;
· Low density, the density is only half of steel;
· The temperature resistance is very good, and it can be used normally in an environment of 800 degrees Celsius;
· Good insulation performance, non-conductive;
· Good corrosion resistance, can be used for a long time in acid-base and other chemically strong environments;
· Good compressive strength and toughness, able to withstand greater impact and pressure

Main Uses of Alumina Wear-resistant Ceramics

· Used in various fields of anti-wear, mainly used in industrial enterprises to manufacture conveying pipes, fittings, gas separators, etc. in powder conveying systems;
· Used in high-temperature environments, such as manufacturing high-temperature heat exchangers, bell tubes and sealing rings, etc.;
· Used in anti-corrosion environment, such as anti-corrosion of material conveying system equipment in acid-base environment;
· Making electronic ceramics, such as circuit boards, substrates, vacuum devices, etc.;
· Production of structural ceramic parts, such as ceramic bearings, seals, water valve plates, wear-resistant parts of textile machines, automotive spark plugs, etc.;
· Used for bulletproof purposes, such as ceramic armored vehicles, bulletproof fragments, etc.

Product Parameters

The material properties of alumina ceramics are shown in the table below.

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

Production Process

Jinghui has been focusing on the production and processing of precision ceramic structural parts for more than ten years. Our product production is mainly divided into 3 steps, forming - finishing - metallization. The production flow chart is shown below.

To ensure the quality of alumina ceramic structural parts, it is necessary to do a good job in every link. Here we focus on the metallization process.

There are many metallization methods on the surface of ceramic structural parts, among which the Mo-Mn method is widely used because of its mature and stable process.

Introduction to Mo-Mn Method

The process of Mo-Mn method is to coat a layer of metal powder (with Mo powder and Mn powder as the main raw materials) on the ceramic surface, and form a solidified and dense metallized layer through high-temperature sintering, thereby realizing the metallization of ceramics.


Advantages of Mo-Mn method

· The process is mature and stable.
· High bonding strength, especially suitable for applications under harsh mechanical and climatic conditions.
· It can be repaired many times without damaging the metallization layer.
· The requirements for solder, metallization paste formula and sintering atmosphere are not very strict, and the process is easy to master.

Product Recommendations
 

Jinghui is an enterprise specializing in the research and production of precision ceramics. Metallized ceramics are our superior products. They have excellent high-frequency and high-voltage insulation properties, high sealing strength, and good vacuum airtightness.

We hope that we will do our best to improve your product performance and reduce production costs with years of practical experience.