Hexagonal BN Hot Pressed Boron Nitride Ceramic Washer
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- Supplier: Xiamen Unipretec Ceramic Technology Co. Ltd.
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Product Overview
Description
Material Introduction
At UNIPRETEC, we produce several advanced ceramic parts with fine engineered ceramics, and one of those is Hexagonal Boron Nitride. We generally choose a form known as hexagonal boron nitride (h-BN). Hexagonal BN is a composite of boron and nitrogen that is both heat and chemically resistant. It is the most robust crystalline type of boron nitride, along with graphite. Since it has a composition identical to graphite, although you will even hear it named "white graphite" since it is white in colour. What is more, hardness of hexagonal BN is similar to graphite, so it is very easily to machine the parts into required shape, only one small tip, machining work should be process in dry conditions with no cooling liquid. Also, visible dust can be created during machining, so wearing mask and goggle is necessary.
Boron nitride ceramic is chemically and has relatively good thermal conductivity, low thermal expansion and microwave clarity. Boron nitride can be quickly machined as well. Moreover, glass, salts and the rest of liquid metals are non-wetting. This ensures that neither of these compounds can be moistened, and it is far more immune to chemical assaults.
Hexagonal boron nitride (h-BN) performs very well under high heat condition and is effective in the air at temperatures of up to 900 degrees C, in the vacuum at 1,900 degrees C and in the inert environment at 2,000 degrees C. BN is self-lubricating as well, as a result, it does not need the use of molecules of gas or water stuck in its layers. Because of this, in a vacuum, which is important for aerospace applications, boron nitride (BN) can work perfectly.
Product Features
Excellent Electrical Insulator
Max. 2000 °C Use Temp.
High Thermal Shock Resistance
Low CTE
Low Wetted by Molten Metals
Easy Machinability
Material Properties
ITEM | UNIT | BN-2000 | BN-2300 | BN-2800 | BN-3000 |
Main Content | - | BN>99% | BN+Al2O3 | BN+AlN | BN+ZrO2 |
Color | - | White | Light Grey | Dark Grey | Dark Grey |
Density | g/cm3 | 1.95-2.00 | 2.25-2.35 | 2.75-2.85 | 2.90-3.00 |
Flexural Strength | Mpa | 30 | 65 | 85 | 90 |
Compressive Strength | Mpa | 55 | 145 | 205 | 220 |
Electrical Resistivity | Ω·cm | >1014 | >1013 | >1013 | >1012 |
Max. Use Temp. (Air) | ℃ | 900 | 1,000 | 1,000 | 1,000 |
Max. Use Temp. (Vacuum) | ℃ | 1,900 | 1,750 | 1,800 | 1,750 |
Max. Use Temp. (Inert) | ℃ | 2,000 | 1,750 | 1,800 | 1,750 |
Thermal Conductivity | W/m.K | 35 | 30 | 85 | 30 |
CTE (25 - 1,000 ℃) | 10-6/K | 1.5 | 2 | 2.8 | 3.5 |
∆ The above data is offered for reference and comparison only, exact data will vary depending on manufacturing method and part configuration.
Applications
▲ Amorphous Alloy Strip Producing
▲ Metal Powder Gas Atomization
▲ Melting Crucibles and Liners
▲ Vacuum Furnace Parts
▲ Aerospace
▲ Sintering Trays and Setters
About Us
UNIPRETEC is a representative technical ceramic company in China. Relying on the technical team with more than 10 years of experience and the cooperation of well-known domestic colleges and institutions, our company covers the manufacturing and sales of oxide, nitride and carbide ceramic products. Based on the research in the advanced ceramic industry, our company is good at providing suitable products and suggestions flexibly according to customers' applications and needs. For many years, our company has focused on meeting the needs of customers from all over the world. Many praises from customers and partners have been encouraging UNIPRETEC to move forward and develop.
"Simple things into very complex, can find new areas; Read the complex phenomenon is very simple, can be found that the new law." - - - - - -Isaac Newton
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