INNOVACERA | technical ceramic solutions

  What Is The PBN Performance Advantages And Usage 18 Dec, 2023 at 10:03 am Pyrolytic boron nitride (PBN)  belongs to the hexagonal crystal system, and its purity can reach 99.999%. It is acid and alkali resistant, anti-oxidation, has good thermal conductivity, is dense, and can be processed. Due to the CVD process, pyrolytic boron nitride has a near-perfect layered structure, resulting in anisotropic thermal conductivity, making it an ideal material for making crystal growth crucibles. It is made of chemical vapor deposition (CVD) of ammonia and boron halides under high temperature and high vacuum conditions. It can not only prepare PBN sheets, but also directly prepare PBN final products such as crucibles, boats, and coatings. Pyrolytic boron nitride is different from ordinary hot-pressed boron nitride (HBN). It does not need to go through the traditional hot-pressing sintering process and does not add any sintering agent. Therefore,the obtained product has the following sig...

  INNOVACERA manufactures a wide range of PBN ceramic components, including discs, sheets, filament rings, VGF crucibles, LEC crucibles, MBE crucibles, conical crucibles, and custom-machined parts. Pyrolytic Boron Nitride (PBN) is a high-purity material derived from hexagonal boron nitride (hBN) using a chemical vapor deposition (CVD) process. This method aligns boron nitride crystals parallel to the substrate, resulting in exceptional purity (99.99%) and durability. PBN’s CVD structure limits wall thickness to 3mm but provides high mechanical strength, making it ideal for high-vacuum environments and molten metal applications. Its unique thermal properties, such as anisotropic thermal conductivity and resistance to high temperatures, make PBN the preferred material for vacuum furnace components and crystal growth crucibles. In molecular beam epitaxy (MBE), a standard process for gallium arsenide (GaAs) crystal production, PBN crucibles excel due to their superior performance. Key ...

    PBN-PG-Heater-Element High purity and high-performance  pyrolytic boron nitride  are used as the substrate for the PBN heating element. Pyrolytic graphite (PG) is placed on the surface of PBN plates by the CVD method as a conductor and heater. As both PG and PBN are extremely pure and very stable in a vacuum or inert atmosphere, the PBN-PG heating element could be very durable and keep the chamber clean. It could be heated to 1600°C in a very short time without the emission of any gas component. These heating elements are ideal products for the semiconductor industry and applications that require high temperature, high vacuum, and high purity. PBN/PG Composite Heating Elements Specifications Size 1″-4″ Bulk Density 2.15-2.19 g/cm3 Max. Working Temperature 2400°C Volume Resistivity (Ω·cm) 3.11*1011 Flexural Strength (Mpa) 243.63 Thermal Conductivity (W/M·k) 43.7-60 Dielectric Strength (at room temperature) KV/mm 56

Source: https://www.innovacera.com/news/pbn-pg-heater-performance-and-applications.html The PBN-PG ceramic heater combines three layers of ultra-high purity ceramics, PBN-PG-PBN to produce an advanced micro-ceramic heating element system. PBN as an insulating substrate and PG as the resistive element. Both our PBN heater (Pyrolytic Boron Nitride) and PG heater (Pyrolytic Graphite) are manufactured by high temperature CVD. These high performance elements exhibit outstanding thermal properties in a ceramic heater, including high thermal conductivity and anisotropy. Mechanically durable and thermally shock resistant, PBN-PG heaters are unaffected by vibration under most conditions and can be tailored to thermal gradients for specific requirements. With an ultra-fast response and low thermal mass, PBN-PG heaters demonstrate a power output of 35 watts/cm 2 (225 watts/in 2) and higher. PBN-PG Performance Advantages: Micro-ceramic heating element has an operating temperature of 1600°C. High m...

Source: https://www.innovacera.com/news/pyrolytic-boron-nitride.html PBN is with 99.99% purity and a grade of hexagonal boron nitride. It is produced by the chemical vapour deposition process to create its solid body and all the boron nitride crystals grow parallel to the surface on which the vapour is deposited. The CVD process gives this pyrolytic boron nitride an almost perfect layered structure, which leads to anisotropic thermal conductivity, making it an ideal material to make crucibles for crystal growing. Main Features 1. The colour of PBN is between ivory and orange-brown, nontoxic, imporosity, easy processing. 2. The purity is up to 99.99%, surface densification, good gas barrier properties. 3. The strength increases as the temperature rises and peaked at 2200℃. 4. Acid, alkali, salt, and organic reagent resistance. Meanwhile, it does not react with the majority of molten-metal and semiconductor material. 5. Excellent thermal shock resistance, excellent thermal conductivity, ...