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    Six Boron Nitride
        Publish time 2018-11-05 16:09    

         Product introduction
    Six Boron Nitride
    Molecular formula: BN
    Molecular weight: 24.18 (according to 1979 international atomic weight)
    Quality standard: 97%, 98%, 99%
    Company standard: Q/ ylh001-2006
    HS code: 2850000090
    CAS no. : 10043-11-5
    Boron oxide is an acid oxide, which can dissolve many basic metal oxides when melting, and generate glassy borate and metaborate (glass) with characteristic color. This is the principle of qualitative identification of metals by borax bead test.
    Boron oxide can be reduced to boron by alkali metals, aluminum and magnesium. Boron oxide can also be used to prepare boron nitride (BN) and calcium hexaboride (CaB6).
    Boron oxide dissolves in water and releases a lot of heat to form metaboric acid and boric acid.

         Product features

    Boron nitride is made up of nitrogen and boron atoms in the crystal, the crystal structure can be divided into: hexagonal boron nitride (HBN), dense rows of hexagonal boron nitride (WBN) and cubic boron nitride, the crystal structure of hexagonal boron nitride have similar graphite layer structure, loose, lubrication, easy absorption of moisture, light and other traits of white powder, say again so "white graphite.
    Theoretical density: 2.27g/ cm3, specific gravity: 2.43, mossberg hardness: 2.
    Hexagonal boron nitride is has good electrical insulation, thermal conductivity, chemical stability, no obvious melting point, heat resistant up to 3000 ℃ in 0.1 MPA nitrogen, in a neutral reduction atmosphere, heat resistant up to 2000 ℃, the nitrogen and argon is used in the temperature can reach 2800 ℃, poor stability in oxygen atmosphere, temperature below 1000 ℃.
    The expansion coefficient of boron nitride is equivalent to that of quartz, but the thermal conductivity is ten times higher than that of quartz. At high temperature also has good lubricity, is a good high temperature solid lubricant, has a strong neutron absorption capacity, chemical stability, almost all molten metals have chemical inertness.
    Hexagonal boron nitride insoluble in 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 are not reactive, slightly soluble in hot acid, with molten sodium hydroxide, potassium hydroxide treatment can be decomposed. It has good corrosion resistance to all kinds of inorganic acid, alkali, salt solution and organic solvent.

    In terms of mechanical properties

    It has the advantages of non-abrasion, low abrasion, size safety, good lubrication, fire resistance and easy processing.

    In terms of electrical characteristics

     It has the advantages of good dielectric strength, low dielectric constant, low loss at high frequency, microwave penetration and good electrical insulation.

    In terms of thermal properties

     It has the advantages of high heat conduction, high heat capacity, low heat expansion, heat shock resistance, high temperature lubrication and high temperature stability.

    In terms of chemical properties

     With non-toxic, chemical stability, corrosion resistance, oxidation resistance, low humidity, biological stability and non-stick advantages.

         Technical indicators

    1 kg/LvBoZhi bags

         Boron nitride parameters

    1, high heat resistance: 3000 ℃ sublimation, the strength of 1800 ℃ for 2 times at room temperature, air cooled to room temperature to 1500 ℃ dozens of times don't burst, 2800 ℃ not soften in the inert gas.
    2, high thermal conductivity, thermal products for 33 w/M.K like pure iron, above 530 ℃ is one of the largest material thermal conductivity in ceramic material.
    3, low thermal expansion coefficient: 2 x 10-6 expansion coefficient is second only to quartz glass, is the smallest ceramic, plus it has a high thermal conductivity, so the thermal shock resistance is very good.
    4, excellent electric properties: good heat insulation, 25 ℃ for Ω - 1014 cm, 2000 ℃ can also Ω - 103 cm, is the best ceramic heat insulation, the breakdown voltage of 3 kv/MV, low dielectric loss 108 hz 2.5 x 10-4, when the dielectric constant of 4, permeable microwave and infrared light.
    5, good corrosion resistance: general metals (iron, copper, aluminum, lead, etc.), rare earth metals, precious metals, semiconductor materials (germanium, silicon, potassium arsenide), glass, molten salt (crystal, fluoride, slag), inorganic acids, alkali does not react.
    6, low coefficient of friction: U 0.16, high temperature does not increase, molybdenum disulfide, graphite, high temperature resistant, oxidizing atmosphere available to 900 ℃, under vacuum available to 2000 ℃.
    7, high purity good B high: its impurity content is less than 10PPM, and B is greater than 43.6%.
    8. Machinability: its hardness is mohs 2, so it can be processed into parts with high precision by general machining methods.

       Range of application

    1, boron nitride is a non-toxic, high temperature resistance, corrosion resistance, high thermal conductivity, high insulation, excellent lubrication performance of the material.
    2. It is not only an electrical insulator but also a thermal conductor, a special electrolysis and resistance material at high temperature, an insulator of high voltage and high frequency electricity and plasma arc.
    3, can be used as semiconductor solid-phase doped material, anti-oxidation or water-resistant grease.
    4. High temperature lubricant and mold release agent, boron nitride powder can also be used as anti-adhesion agent for glass beads, mold release agent for glass and metal forming.
    5. The super-hard material processed by boron nitride can be made into high-speed cutting tools and drilling bits for geological exploration and oil drilling.
    6. Structural materials of atomic reactors, nozzles of aircraft and rocket engines, packaging materials to prevent neutron radiation, and thermal shielding materials in aerospace.
    7, non-toxic and harmless and lubricity, can be used as a cosmetic filler.
    8. With the participation of catalyst, it can be converted into cubic boron nitride as hard as diamond after high temperature and pressure treatment.
    9, do a variety of capacitor film aluminum plating, image tube aluminum plating, aluminum display, such as evaporation boat.
    10, transistor heat seal desiccant and plastic resin and other polymer additives.
    11, all kinds of laser anti-counterfeiting aluminum plating, trademark bronzing materials, all kinds of cigarette labels, beer labels, packaging boxes, cigarette packaging boxes aluminum plating and so on.


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