Advanced Alumina Metallized Ceramic Ring / Tube for Gas Discharge

Product Description

Advanced Alumina Metallized Ceramic Ring / Tube for Gas Discharge

Introduction to Ceramic Structural Parts

Ceramic structural parts are a general term for various complex-shaped ceramic parts.

Ceramic structural parts are made by selecting high-purity synthetic compounds (such as alumina, zirconia, silicon nitride, etc.), using forming method like dry pressing, hot pressing, isostatic pressing or injection molding, sintering at high temperature, and finally performing precision machining.

What are the Advantages of Ceramic Structural Parts?

Ceramic structural parts have high temperature resistance, corrosion resistance, wear resistance, insulation and other properties, and can work well in various harsh environments.

Production Process

Our product production is mainly divided into 3 steps, forming - finishing - metallization. The production flow chart is shown below.

1. Forming Method

There are mainly Dry Pressing, Hot Pressing, Isostatic Pressing, and Ceramic Injection Molding (CIM), each of which has its own advantages and disadvantages. We will choose the most suitable forming method on the basis of saving costs and ensuring quality.
 

2. Finishing Process

In order to achieve the precision of the product, most ceramic structural parts need further finishing treatment after the sintering process. The main finishing processes we use are machining (lapping, polishing...) and glazing.

3. Metallization Process

Metallization of ceramics refers to the creation of thin metal layers (films) on the surface of ceramics. After the surface of the ceramic material is metallized, it has both the characteristics of ceramics and the properties of metal.

Which Metallization Processes We Support?

Jinghui specializes in the production of metallized 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 Mo-Mn method, electroless nickel plating method, silver firing method and W-Au method. Here we focus on the Mo-Mn method.

Introduction to Mo-Mn Method

The process of the 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.

The brief process of Mo-Mn method is shown in the picture below.

Metallized ceramic structural parts obtained by the Mo-Mn method have the following characteristics:

1. High bonding strength, high air tightness, high reliability and good heat resistance.
2. The finished product has dual characteristics of ceramic and metal.

We can produce metallized ceramic structural parts of various specifications according to customers' drawings.

Product Applications

Ceramic structural parts are widely used in semiconductor, optical fiber communication, laser, medical, equipment, petroleum, metallurgy, electronics and other industries.

We can produce products with different precision and complex structure according to customers' requirements.

Product Parameters

The following is the material properties of our alumina ceramic structural parts.
 

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 Recommendations

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!