Jinghui Industry Limited
Jinghui Industry Limited
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Thick Film Deposition Metalized Ceramic Washer for High Vacuum Technology
Ceramic-to-metal and ceramic to ceramic bonding have been one of the biggest challenges in the high voltage, high power, electronic industries, high current vacuum electrical in the past years because of their inherent differences in the thermal expansion coefficients of the two types of materials. So far, the most regular preferred and effective method for creating a leak-tight, robust joint between ceramic and metal is by brazing. This starts with the chemical bonding metallization of the ceramic to create a wettable surface on which braze alloy will flow between the two components during the brazing process.
Technical specification and production capability:
Optional material | 95% alumina | 99% alumina | Zirconium Oxide | Beryllia Oxide | Nitride Aluminum |
Max. outer diameter | 800 mm | Max. Inner diameter | 780 mm | Max. length | 1000 mm |
Nominal tolerance | OD ±0.05 mm | Nominal tolerance | ID ± 0.10 mm | Nominal tolerance | L ±0.50 mm |
Nominal flatness | 0.05 mm | Nominal roundness | 0.10 mm | Nominal parallelism | 0.05 mm |
Surface treatment | Metalization | Glaze | Polishing |
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Metalization types | Ceramic base + Mo/Mn | Ceramic base + Ag plating | Ceramic body +Mo/Mn + Ni plating | Ceramic body + W + Au plating | |
Prime features:
● High bonding/brazing strength ● Min. electric resistance and vacuum tightness
● High mechanical strength, insulation strength ● Anti-chemical, anti-aging without corrosion
● Super wear resistance with long service life
Key performance parameters
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) |
Visual quality: 1. No cracks, no bubbles; 2. Evenly distributed glaze; 3. No contamination | |||
Metalized ceramic insulators are widely used in electronics, high-vacuum technology, sensors, and medical fields, like vacuum interrupters, electron tubes, feedthroughs, medical linear accelerators/ power tubes, photomultipliers, X-ray tubes, and pressure sensors.
1. Vacuum packaging to be a vacuum state with drier as the inner package;
2. An exported carton as the outer package; Inside of carton will be filled with protective kinds of stuff.
3. The wooden case will be used if needed when the carton is very heavy.
★ 10+ Years of manufacturing experience in OEM, ODM ★ In-house comprehensive manufacturing types of equipment
★ Powerful R&D, mass production capability ★ Rigorous quality control system and processes
★ Surpassing pre-sales and after-sales service ★ Abide all orders as the first priority
Q1. Are you a factory or trading company?
A: We are a manufacturer. You are welcome to visit our factory.
Q2: Do you send a sample to check?
A: Sure, the sample is free and freight collect.
Q3: When will you ship it?
A: If the products are in storage, we'll ship within 48 hours
Q4: 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 will proceed with your inquiry as a priority.
Q5: Is it available to provide customized products?
A: We always support custom-made demand as per different materials, dimensions, and designs.
Q6: How to ensure quality?
A: The dimension out of any batch will be carried out sampling inspection per international AQL standard. A 100% cosmetic inspection will be done.
Q7: What other products are you dealing with?
A: We focus on a variety of ceramic tubes, ceramic substrates, ceramic sheets, textile ceramics besides metalized ceramics.