Our boron nitride ceramics can reach a purity of up to 99.7% or more through the process of removing impurities and oxygen so that ultra-high purity boron ceramic tubes can be processed. It will not stick to the product, will not pollute it, and has a long service life. The thermal conductivity at room temperature can reach 50W/mK. The maximum operating temperature in an inert atmosphere is 2100°C. Therefore, high-purity boron nitride tubes are particularly suitable for use in high-temperature environments with temperatures exceeding 1700 degrees Celsius.
High-temperature furnace designs contain heating elements made of carbon, tungsten, or molybdenum. Alumina ceramics are generally used as insulators to isolate the heating elements and the furnace side. With the development of technology, more and more companies need high-temperature electric furnaces with shorter production cycles and faster heating and cooling speeds. These oxide ceramic insulation parts are prone to component failure due to high pressure, which increases the downtime of the furnace.
Compared with traditional alumina materials, hot-pressed ceramic parts made of hexagonal boron nitride (hBN) have a much longer working life. For thermal processes at extremely high temperatures and under vacuum or inert conditions, boron nitride ceramics are often the only viable solution.
Advantages of Boron Nitride Ceramics
– High-temperature resistance: It can maintain structural integrity and stable performance in a high-temperature environment.
– No bonding: It does not bond the product and does not pollute the product.
– Excellent corrosion resistance, can resist erosion by various corrosive media.
– Thermal conductivity: It has high thermal conductivity and can effectively conduct heat.
– Excellent thermal shock resistance, high electrical breakdown strength (3-4 times that of alumina), and carbon atmosphere corrosion resistance is much stronger than alumina.
– It is not wetted by aluminum water and can protect the surface of materials in direct contact with aluminum liquid, magnesium, zinc alloy, and slag. In the field of high-temperature furnaces, including vacuum furnaces, hot pressing sintering furnaces, and hot isostatic pressing furnaces, Edgetech can provide a variety of boron nitrides precision machining parts, such as boron nitride tubes, BN washers, BN insulators, BN insulation plates, BN flanges and other high thermal shock resistant boron nitride ceramic insulator parts to meet customers’ specific requirements in the high-temperature furnace industry.