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Boron Nitride

Executive standard: Q/YTY003-2011
CAS NO.10043-11-5
English alias: White Graphite
English abbreviation: BN
Chines alias: 白石墨;一氮化硼

Product parameters

Executive standard: Q/YTY003-2011

Chines alias: 白石墨;一氮化硼

English alias: Boron Nitride, White Graphite

CAS RN: 10043-11-5

1. Physical and chemical properties:

1.1 Molecular formula: BN

1.2 Molecular weight: 24.81(on 1979 international atom weight)

1.3 Structure formula:

Structure formula

1.4 Melting point: 3000℃(stable in the inert atmosphere)

1.5 Mohs′ hardness: 1-2

1.6 Density: 2.29g/cm3

1.7 Solubility: Insoluble in water.

1.8 Properties: Boron nitride is white, soft and smooth powder that could be similar to the properties of the graphite what used to be known as boron mononitride. It has excellent electrical properties of electrical insulating, thermal conductivity, corrosion resistance and good lubrication. In addition, it has corrosion resistance to all melting metals. Its oxidation resistance temperature can reach 1000℃, and can reach 3000℃ when it be used in nitrogen and argon.

2. Technical indexes:

Item 1st grade 2nd grade
BN ,% ≥99.0 ≥96.0
B2O3 ,% ≤1.0 ≤1.5
Particle size micron, nano
Appearance White loose powder

3. Application: Boron nitride could be extensively used in the industries of petroleum, chemical, machinery, electronics, electric, textiles, nuclear, space and other. It has been used as the additives of plastic resin, the insulators of high-voltage high-frequency point and plasma arc, the solid-phase mixed material of semiconductor, the structural material of atomic reactor, the packing material for preventing neutron radiation, the solid lubricant, wear-resisting material and benzene absorbent, etc. The mixture of titanium diboride, titanium nitride and boron oxide, which is obtained by hot-pressing forming of boron nitride and titanium, is used as the catalyst for dehydrogenation of organic matters, rubber synthesis and platforming. In high temperature, it could be used as the specific materials of electrolysis and resistance, and hot sealing dry-heating agent of transistor. It is the material of aluminum evaporating container. The powder could be also used as the abherent for glass microbead, the release agent of molding glass and metal.

Use: Boron nitride powder is widely used in the fields of electronics, aerospace, oil and gas, ceramic manufacturing and cosmetics.
1) Electronics cooling, ceramic sintering, protective coatings and sheaths, lubricant additives, cosmetics fillers.

2) When used as a cooling filler in a variety of resin systems, boron nitride powder is required good heat dissipation, low dielectric loss, and low thermal expansion. Thermal conductivity of single crystal boron nitride is >300 W/mK.  Thermal conductivity of about 95% dense polycrystalline granules is >125 W/mK.

3) Resistant to and non-wet by most molten metals, slags and drosses, boron nitride coatings can be used up to 1372°C (2500°F) in a reducing atmosphere and up to 850°C (1562°F) in an oxidizing atmosphere, and retain many of its properties such as high temperature lubricity and corrosion resistance.

4) Boron Nitride machinable ceramic is made by hot pressing Boron Nitride powders at high temperature and pressure. Boron Nitride can easily be machined into rods, bars, plates and even intricate custom shapes, has highly exceptional thermal, physical and chemical characteristics.

5) Boron nitride is used in a wide range of applications such as food processing equipment, used as high-temperature greases and oils, anti-seize compounds, dielectric greases, release agents for gaskets and seals. Boron nitride lubricant additives are electrically insulating, are unmatched in thermal conductivity, have low coefficients of friction and oxidation resistance at high temperatures (up to 900°C).

6) Boron nitride has unique properties that are associated with crystal size, morphology and surface characteristics.  From sub-micron crystals to 50 micron platelets, each grade within this range has a different appearance from matte to shiny, but all are soft, smooth and adherent. Boron nitride cosmetics filler is a dielectric ceramic powder that remains on the skin's surface, offering a transparent and photo-stable layer of protection for skin care actives.

4. Safety instructions: With the physical inert of boron nitride, but it is toxic by ingestion, inhalation, eye and skin contact. Skin, respiratory system, liver, kidney and the circulatory system may be abnormal by swallow and inhalation. Eye and skin contact can cause inflammation. Operation must be installed with rubber gloves, a respirator and eye protection by wearing protective clothing.

5. Packing: Aluminum foil bag lined with plastic bag, net weight 1kg per bag.

6. Storage: Stored in a cool, ventilated place. Keep sealed. The shelf life is 12 months after manufacturer date. It is still available if retest result is qualified after expire date.

7. Transportation: Avoid water and exposure during transportation. Do not mix with strong oxidizer.


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