SUOYI Boron Nitride Powder BN hexagonal boron nitride HBN CBN RBN WBN

Boron nitride is a crystal composed of nitrogen atoms and boron atoms. The crystal structure is divided into hexagonal boron nitride (HBN), densely packed hexagonal boron nitride (WBN) and cubic boron nitride. The crystal structure of hexagonal boron nitride has a similar graphite-like structure, showing loose, lubricated, easy moisture absorption, light weight and other characters of white powder, so it is also called “white graphite”.

Theoretical density 2.27g/ cm3, specific gravity: 2.43, Mo hardness is 2.

Hexagonal boron nitriding has good electrical insulation, thermal conductivity, chemical stability, no obvious melting point, heat resistance in 0.1MPA nitrogen to 3000ºC, in neutral reducing atmosphere, heat resistance to 2000ºC, nitrogen and argon in the use of temperature can reach 2800ºC, in oxygen atmosphere stability is poor, the use of temperature below 1000ºC.

Hexagonal boron nitride has the same expansion coefficient as quartz, but its thermal conductivity is ten times that of quartz. It also has good lubricity at high temperature, is an excellent high temperature solid lubricant, has strong neutron absorption capacity, chemical stability, and is chemically inert to almost all molten metals.

Hexagonal boron nitriding insoluble cold water, water boiling hydrolysis is very slow and produce a small amount of boric acid and ammonia, and weak acid and strong base at room temperature do not react, slightly soluble in hot acid, with molten sodium hydroxide, potassium hydroxide treatment to decompose. It has considerable corrosion resistance to various inorganic acids, bases, salt solutions and organic solvents.

● Heat resistant

● Thermally stable (up to 1000˚C in air, 1400˚ in vacuum, and 2800˚ C in an inert atmosphere)

● Chemical resistant

● Chemically inert and stable

● Low thermal conductivity

● Low thermal expansion

● Low dielectric constant

● Non-wetting (glass, salts, some metals)

● Self-lubricating

● Easily machined

● Electrically insulating

Some of the most common boron nitride applications we complete include:

● Furnace fixture supports and components

● Melting crucibles for glass and metals

● Plasma and welding tip insulators

● High temp thermal complete systems

● Molten metal carrier pipes

● Nuclear reactor shields and linings

● Semiconductor wafers

● Ceramic bushings

● Heat radiation shielding

● Ceramic washers

● Transistor heat sinks

● Sputtering targets

● Microwave tubes

● Ceramic coating and paints

● Pump nozzles

● Nanotechnology

● Refractory molds for glass forming and titanium forming

● Ceramic electrical insulators

● Boats

● Thermocouple protection sheaths

Hexagonal boron nitride is a kind of advanced ceramic material. Its microstructure is flaky and its molecular structure is hexagonal crystal. Hexagonal boron nitride has very special and excellent physical and chemical properties. It has very good thermal conductivity, electrical insulation, chemical corrosion resistance and oxidation resistance. It can withstand up to 1000OC in air, and up to 2000OC in inert gas and vacuum. The crystalline boron nitride has been sintered at a high temperature of 2000OC, with stable chemical and physical properties and excellent thermal conductivity (the thermal conductivity of single crystal is about 250-300W/mk). At present, the company produces flake crystalline powder with a single crystal size of 500 nanometer-20 microns and nanoscale spherical boron nitride.

Hexagonal boron nitride is favored by the electronic industry because of its rare conditions of high thermal conductivity and electrical insulation performance. Domestic and foreign electronic manufacturers have conducted large-scale application research in thermal conductive plastics, semiconductor packaging and filling, LED heat dissipation packaging, etc. It has excellent performance in some traditional metal smelting, casting, special lubricating oil, glass industry and other boron nitride industries.

Some industries that typically benefit from hexagonal boron nitride ceramics include:

● Aerospace

● Metalforming

● Electronics

● Heating and Cooling

● Glass Fabrication

● Military and Defense

● Thermal Processing

● Power Generation and Electricity

● Mineral Processing