Glazed 95 Alumina Ceramic Insulating Envelope for Vacuum Interrupter

• Application: Refractory, Structure Ceramic, Industrial Ceramic, Brazing
• Type: Ceramic Parts
• Product Name: Refractory Metallized Alumina Ceramics
• Optional Purity: 96%, 99% and 99.5% Alumina
• Color: White, Beige, Pink
• Surface Treatment: Polished, Glazed
• Model NO.: Customized
• Norminal: 1% of Dimensions
• Usage: for Ceramic to Metal Joint Technology
• Material: Alumina Ceramic
• Transport Package: Vacuum Packaging with Desciant
• Specification: 36cm x 20cm x 24cm
• Trademark: JingHui
• Origin: China
• HS Code: 8547100000
• Production Capacity: 50000/Month

Product Description

Glazed 95 Alumina Ceramic Insulating Envelope for Vacuum Interrupter
 

Product Description

JingHui Ceramic supplies various custom metalized alumina ceramics in a selection of purities, mainly including 95%, 97%, and 99%. These metalized ceramics are ideal for use within high vacuum, high voltage, and high-pressure applications.

To suit different applications, these metalized alumina ceramic components can be shaped with different shaping methods in-house, regularly covering dry pressing and cold isostatic pressing.

Common metalized alumina ceramics consist of molybdenum-based paints followed by nickel plating. A coating of molybdenum and manganese particles mixed with glass additives and volatile carriers is applied to the ceramic surface to be brazed. The application of the coating may be hand-painted, sprayed, or robotically applied. After air drying, the coating is fired in a wet hydrogen environment at 1450°-1600°C leaving a "glassy" metallic coating 15-40 microns thick, to ensure high bond strength between the metallized layer and the ceramic base. In addition, tungsten is a typical metallization in our facility.

The fired coating is subsequently plated with a 2-6 micron nickel layer. The nickel plating is sinter-fired at 850°-950°C in a dry hydrogen atmosphere leaving a finished metallic surface that can be readily brazed using standard braze filler metals.

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)

Typical Applications

Metalized ceramics are widely used in electronics, high-vacuum technology, sensors, and medical fields, like vacuum interrupters, electron tubes, feed-throughs, medical linear accelerators/ power tubes, photomultiplier, X-ray tubes, and pressure sensors

 

We also produce

 

Why choose us?

★ 10+ Years of manufacturing experience in OEM, ODM for producing a variety of technical ceramic parts

★ In-house comprehensive manufacturing types of equipment from raw material to secondary process

★ Powerful R&D and mass production capability to support and meet customized needs in a short time

★ Rigorous quality control system and processes from incoming material to shipping of finished goods        

★ Surpassing pre-sales and after-sales service, all actions we do are just for customers' business growth       
   

Our Partners

FAQ

Q1. Are you a factory or trading company?

A: We are a manufacturer with 16 years of OEM, and ODM experience for technical ceramic components. 

Q2: Can you send a sample to check?
A: Exactly, the standard type of sample in stock would be free of charge, but freight collected.

Q3: When can I get the price?
A: We regularly quote within 24 hours after we get your inquiry. If you are in urgent need of getting the price.
Please call us or tell us in your email so that we can proceed with your inquiry as a priority.

Q4: Is it available to provide customized products?
A: We always support custom-made demands as per different materials, dimensions, and designs.

Q5: How to ensure quality?
A: The dimension out of any batch will be carried out sampling inspection per international AQL standards.
The cosmetic inspection will be done fully.