Tailor made Professional Ceramic to Metal Brazed Processing in Vacuum or Reducing Furnace
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- Supplier: SHANGHAI FINE-BOON SCIENCE & TECHNOLOGY CO. LTD.
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Product Overview
Description
Product Description
Tailor-made Professional Ceramic to Metal Brazed Processing in Vacuum or Reducing Furnace
- High precision and good appearance after brazing
- 100% hellium leaking tested before shipping
- High bonding strength and hermetic sealing after brazing
- Good insulation, anti-magnetic, static electricity-free character
- Excellent thermal shock resistance and good thermal stability after brazing
- Outstanding bending strength and toughness
- Anti corrosion & abrasion resistance in harsh working environments
- Complying with ROHS and REACH regulations
- Reliable quality, non-toxic, healthy material, Eco friendly
- Professional brazing team is available for your requests of various ceramit to metal brazed parts
- Professional brazing team is available for your requests of various ceramit to metal brazed parts
Kovar alloy is a glass and ceramic sealing metal alloy, it has been used for hertmetic seals with the harder Pyrex glasses and alumina ceramic material.The expansion characteristics of Kovar match both glasses and alumina ceramics, making it one of the most popular controlled expansion alloys for hermetic sealing applications. Kovar is produced to ensure good properties for stamping ,machining and deep drawing, and is a porosity free product.
Product Name | Tailor-made Professional Ceramic to Metal Brazed Processing in Vacuum or Reducing Furnace |
Components | 96.0% alumina insulator, OFHC copper pin, kovar cap and 316 SS CF Flange |
Flange Type | QF flange, KF flange |
Ceramic Treatment | Sintered with Molybdenum & Manganese (Mo+Mn), then Nickel plating |
Brazing Alloy | Cu-Ag Alloy |
Connector Type | OFHC Copper Pin or Tube |
Max. Voltage | 5000 V |
Vacuum Application | HV or UHV |
Max. Using Temperature | Ambient to +450 oC |
Using Fields | Vacuum furnaces, Power tubes, Microwave tubes, Transistors, Diodes, Hybrid packages and scientific instruments |
Kovar Alloy Chemical Compositions Sheet - made by Shanghai Fine-Boon | ||||||||
Elements | Symbol | YB/T 5231 | ASTM F15 | DIN 17745 | ||||
4J29 | K94610 | 1.3981 | ||||||
Carbon | C | ≤0.03 | ≤0.04 | ≤0.05 | ||||
Silicon | Si | ≤0.30 | ≤0.20 | ≤ 0.30 | ||||
Manganese | Mn | ≤0.50 | ≤0.50 | ≤0.50 | ||||
Phosphorus | P | ≤0.020 | - | - | ||||
Sulphur | S | ≤0.020 | - | - | ||||
Nickel | Ni | 28.5~29.5 | 29.0* | 28.0~30.0 | ||||
Cobalt | Co | 16.8~17.8 | 17.0* | 16.0~18.0 | ||||
Chromium | Cr | ≤0.20 | ≤0.20 | - | ||||
Copper | Cu | ≤0.20 | ≤0.20 | - | ||||
Molybdenum | Mo | ≤0.20 | ≤0.20 | - | ||||
Aluminum | Al | - | ≤0.10 | - | ||||
Magnesium | Mg | - | ≤0.10 | - | ||||
Zirconium | Zr | - | ≤0.10 | - | ||||
Titanium | Ti | - | ≤0.10 | - | ||||
Iron | Fe | Balance | 53.0* | Rest | ||||
*:norminal valves, they should be adjusted by the manufacturer so that the alloy meet the requirement for CTE in different temperature range | ||||||||
The two above sheets are the various Standard Alumina Performance Characters Data Sheets
& various ceramic performance comparison sheets
Belows are the character sheets for the parts made with kovar alloy, so you can check it for your technical reference
Kovar Material Specifications Sheet - made by Shanghai Fine-Boon | ||||||
No | Item | Unit | Value | |||
1 | Kovar Density | g/cm3 | 8.36 | |||
2 | Melting Temperature | ℃ | 1450 | |||
3 | Specific Resistivity | Ω mm2 / m | 0.49 | |||
4 | Electrical conductivity | S/m | 2.174×106 | |||
5 | Thermal Conductivity | W/m·K | 17 | |||
6 | Specific Heat | J/g∙K | 46 | |||
7 | Curie Temperature | °C | 435 | |||
8 | Youngs Modulus | Gpa | 138 | |||
9 | Elastic Modulus | Gpa | 157 | |||
10 | Yield Strength-Rp0.2 | Mpa | 350 | |||
11 | Tensile Strength-Rm | MPa | 440-640 | |||
12 | Elongation Rate-A5 | % | ≥25 | |||
13 | Reduction of Area | % | 30 | |||
14 | Hardness | HRB | 68* | |||
* This valve is measured for Kovar material annealed 1830℉ (999℃) for 30 minnutes, then furance cooled | ||||||
Coefficient of Thermal Expansion for Kovar as Annealed - made by Shanghai Fine-Boon | ||||||||
No | Temperature Range | μm/m·℉ | μm/m·℃ | |||||
Fahrenheit degree - ℉ | Celsius degree - ℃ | |||||||
1 | 77℉ - 212℉ | 25℃ - 100℃ | 3.25 | 5.86 | ||||
2 | 77℉ - 392℉ | 25℃ - 200℃ | 2.89 | 5.20 | ||||
3 | 77℉ - 572℉ | 25℃ - 300℃ | 2.85 | 5.13 | ||||
4 | 77℉ - 662℉ | 25℃ - 350℃ | 2.72 | 4.49 | ||||
5 | 77℉ - 752℉ | 25℃ - 400℃ | 2.81 | 5.06 | ||||
6 | 77℉ - 842℉ | 25℃ - 450℃ | 2.92 | 5.25 | ||||
7 | 77℉ - 932℉ | 25℃ - 500℃ | 3.41 | 6.15 | ||||
8 | 77℉ - 1112℉ | 25℃ - 600℃ | 4.34 | 7.80 | ||||
9 | 77℉ - 1292℉ | 25℃ - 700℃ | 5.06 | 9.12 | ||||
10 | 77℉ - 1472℉ | 25℃ - 800℃ | 5.73 | 10.31 | ||||
11 | 77℉ - 1652℉ | 25℃ - 900℃ | 6.25 | 11.26 | ||||
* Kovar material annealed 1830℉ (999℃) for 30 minnutes, then furance cooled | ||||||||
Our Company
Factory Birdivew
Our factory for various ceramic to metal brazed parts production
Workshops View
Our workshop for various ceramic to metal brazed parts production
Packing & Delivery
Packing Details: PE blister shell for each various ceramic to metal brazed parts, seaworthy packing in paper carton
Delivery Details: 30 days after order of various ceramic to metal brazed parts was issued
1. Blister shell packed for various ceramic to metal brazed parts separately in carton
2. All cartons are loaded in Ply-wood standard pallets with films wraped.
3. All shipping methods are available for your choice.
Our Certifications
FAQ
Q: Are you trading company or manufacturer?
A: We are a professional manufacturing factory with our own exporting office in Shanghai
Q: How long is your delivery time for customized various ceramic to metal brazed parts?
A: Generally it is 30 days after your P/O issued to us , it is according to quantity.
Q: Do you provide samples of various ceramic to metal brazed parts? is it free or charged?
A: Yes, we could offer these samples for free, but don't afford freight.
Q: What is your terms of payment for various ceramic to metal brazed parts?
A: Payment<=1000USD, 100% in advance.
Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have any other question for ceramic to metal brazed parts, pls feel free to contact us as below:
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