dielectric Boron Nitride Ceramic electronic components
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Boron Nitride Ceramic:
High temperature and high pressure synthesis
In 1957, Wentorf first synthesized cubic BN. When the temperature is close to or higher than 1700 ° C and the lowest pressure is 11 ~ 12 GPa, the pure hexagonal boron nitride (HBN) is directly converted into a boron nitride (CBN). It was subsequently discovered that the use of a catalyst can greatly reduce the transition temperature and pressure. Commonly used catalysts are: alkali and alkaline earth metals, alkali and alkaline earth nitrides, alkaline earth fluoronitrides, ammonium borate salts and inorganic fluorides. Among them, the temperature and pressure required for using ammonium borate as a catalyst are the lowest, the pressure required at 1500 ° C is 5 GPa, and the temperature range is 600 to 700 ° C at a pressure of 6 GPa. It can be seen that although the addition of the catalyst can greatly reduce the transition temperature and pressure, the required temperature and pressure are still high. Therefore, the equipment for the preparation thereof is complicated and costly, and its industrial application is limited.
It has good heat resistance, thermal stability, thermal conductivity, high temperature dielectric strength, and is an ideal heat dissipating material and high temperature insulating material. Boron nitride has good chemical stability and is resistant to most of the molten metal. It also has good self-lubricating properties. Boron nitride products have low hardness and can be machined with an accuracy of 1/100 mm.
Boron nitride can be used in the manufacture of high-temperature containers for metallurgical melting, semiconductor heat-dissipating insulation parts, high-temperature bearings, thermowells, and glass forming dies.
Shenzhen Hard Precision Ceramic CO.,Ltd founded in 2007, located in Shenzhen of China. We are a company that integrates development, design, molding, sintering, production and sales of precision ceramic products. After 10 years of development, we have cooperated with more than 2000 customers and 60 universities; Our factory covers an area of 2000 square meters, 50 employees, and annual production value of nearly 20 million. We have a higher visibility and better reputation in the same industry.Our products include ceramic rods, tubes, plates, blocks and precision parts for industrial. We have all-line high precision equipments from ceramic forming, sintering to precision machining. Hope for a wide range of sincere cooperation with customers at home and abroad.
Why Choose Us? 1.12 years of professional production industrial ceramics factory 2.High quality products with low price 3.High precision parts with lowest tolerance 4.Show time for production 5.Has a group of experienced, professional and efficient R&D team 6.Has a good reputation in China and abroad.
7.MOQ is not limited, small quantity is welcome.
8.Vigorous team and good after-sales service
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-30 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
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