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XTL sintyron alumina ceramic mo mn vacuum interrupters metallized tube

alumina ceramic metallized tubes are essential components in vacuum interrupters, providing both electrical insulation and reliable conductivity. With their high durability and resistance to extreme conditions, these tubes help to ensure the safe and efficient operation of electrical circuit breakers in a wide range of applications.

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Alumina ceramic mo mn vacuum interrupters metallized tube


The description of the metalized ceramics

Alumina ceramic is a versatile and highly durable material that is commonly used in a variety of

applications, including vacuum interrupters. Vacuum interrupters are essential components in electrical

circuit breakers, where they are used to safely interrupt the flow of electrical current when necessary.


In vacuum interrupters, alumina ceramic is often used to create the outer casing or tube that houses

the internal components of the interrupter. This ceramic material is chosen for its high electrical insulation

properties, as well as its ability to withstand high temperatures and mechanical stress.


The alumina ceramic tube used in vacuum interrupters is typically metallized in order to improve its electrical

conductivity. Metallization involves coating the surface of the ceramic with a thin layer of metal, such as

molybdenum (Mo) or manganese (Mn). This metallized layer helps to create a strong bond between the

ceramic and the metal components within the interrupter, ensuring reliable electrical connections.


The metallized tube also plays a crucial role in maintaining a high vacuum seal within the interrupter. By

creating a hermetic seal between the ceramic tube and other components, the metallized layer helps to

prevent air or other contaminants from entering the vacuum chamber. This is essential for ensuring the

proper functioning of the interrupter and preventing arcing or other electrical faults.

Standard types of the metalization
1. Alumina ceramic base +  silver (Ag) plating directly
2.Alumina ceramic base +  molybdenum (Mo/Mn) metallization
3.Alumina ceramic base +  molybdenum (Mo/Mn) metallization + nickel (Ni) plating
4. Alumina ceramic base + tungsten (W) metalization + gold (Au) plating 

The key parameters capability

Leak rate ≤1×10-11 Pa•m3 / s Metal layer tensile strength ≥ 150Mpa
Volume Resistivity ≥108Ω•cm CTE (6.5 ~ 8.0) × 10-6 /°C
Insulation strength ≥18kV/mm (D•C) Dielectric constant 9~10(1MHz, 20°C)
Cosmetic quality: 1. No cracks, no bubbles; 2. Evenly distributed glaze; 3. No contamination

The prime features of alumina metalized ceramics
1. High bonding/brazing strength with ideal vacuum tightness between the assembly
2. With diamond-like hardness to be 85 HRV and superb compressive strength 
3. Great insulation strength and volume resistivity that fit for various high voltage high current applications     
4. Chemical stability, anti-aging even if it works in a variety of harsh environments, free of rust forever.
5. Over 276 times wear resistance in comparison with stainless steel, leads to a long service lifespan.






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  Ω·cm 20°C








Why us?
* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.

Are you a trading company or a manufacturer?
* We are a manufaturer. 

Can you provide the free samples?
* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.

Do you accept customized production based our specification?
* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t have a drawing, just tell us your idea, we will work out the drawing for you.


What's the delivery time?
* 7 working days for standard products 30 days for customized products. 

What is the MOQ?
* No limit to the quantity. We can offer the best proposal and solutions according to your condition.

What is the payment terms you accept?
* T/T,LC,Western Union,moneygram are acceptable.

How to deal with the faulty?
* Firstly, Our product are produced in strict quality control system and the defective rate will be less than 2%.
If there are problems with the product, we will provide free replacement.

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