Silver Firing Alumina Structural Component Metallized Ceramic Insulator

Product Description

Silver Firing Zirconia Structural Component Metallized Ceramic Insulator

Product Parameters

The main raw material of this product is zirconia ceramics. Zirconia ceramics have the advantages of high toughness, high bending strength, high wear resistance, excellent heat insulation performance, and a thermal expansion coefficient close to that of steel, so they are widely used in the field of structural ceramics.

The material properties of zirconia are shown in the figure below.

Category	Property	Unit	ZrO2 (Y-TZP)	ZrO2 (MSZ)
Mechanical	Density	g/cm^3	≥6.0	≥5.72
	Water absorption	%	0	0
	Vickers hardness	HV	1300	1200
	Flexural strength	Mpa	≥ 1200	≥ 900
	Compressive strength	Mpa	≥ 1990	≥ 1750
	Fracture toughness	Mpam^1/2	6.5-8	11
Thermal	Max. Service temperature (non-loading)	ºC	1000	1200
	CTE (Coefficient of thermal expansion) 20-800ºC	1×10^-6/ºC	8.0-9.5	7.8-9.3
	Thermal shock	T (ºC)	≥ 300	≥ 300
	Thermal conductivity 25ºC	W/(m·k)	3	2
	Specific heat	1×10^3J/(kg·k)	0.46	0.46
Electrical	Volume resistivity 25ºC	ohm·cm	> 1×10^13	> 1×10^13
	300ºC		1×10^10	1×10^10
	500ºC		2×10^5	2×10^5
	Dielectric strength	KV/mm	17	9.4
	Dielectric constant (1Mhz)	(E)	29	28

Product Features

Compared with steel structural parts, the advantages of ceramic structural parts are:

1. higher limit speed;

2. more suitable for precision occasions;

3. service life is generally 5 times that of steel structural parts;

4. can be used at higher temperatures;

5. more adaptable to temperature changes;

6. applicable in chemical corrosion occasions and magnetic occasions.
 

Why do Metallization on the Surface of Ceramic Structural Parts?

The metallization of ceramic surfaces is a process with high technical content. The specific influencing factors include metallization formula, metallization temperature and holding time, metallization microstructure, metallization coating thickness and coating method, etc.

The function of the metallization layer on the ceramic surface is to enhance or improve the surface properties of the product, such as oxidation resistance, wear resistance, corrosion resistance, and certain electrical, optical and tribological properties.
 

Production Process

How Our Ceramic Parts are Produced?

Jinghui has been focusing on the production and processing of precision ceramic structural parts for more than ten years. As shown below, the production process of our ceramic structural parts is generally divided into five main steps, ceramic powder preparation - forming - sintering - post finishing - metallization.

Which Metallization Processes We Support?

Jinghui specializes in the production of metalized ceramic structural components, has rich experience in manufacturing precision ceramic parts, and is proficient in the surface metallization process of ceramic structural parts such as the Mo-Mn method, electroless nickel plating method, silver firing method, and W-Au method. Here we focus on the silver firing method. 

Introduction to the Silver Firing Method

The silver firing method is to infiltrate a layer of metallic silver on the ceramic surface. Silver has strong electrical conductivity and good oxidation resistance. The fired silver layer is firmly bonded, the thermal expansion coefficient is close to that of the ceramic, and the thermal stability is good. In addition, the firing temperature is low, the requirements on the atmosphere are not strict, and the firing process is simple and easy.

The brief process of the silver firing method is shown in the picture below.

Our Advantages

Thank you for your visit. We can produce and process various special-shaped and high-precision ceramic structural parts according to your requirements. We are confident that we can fulfill your product requirements well. Welcome to order with drawings or samples, and look forward to becoming your reliable partner!