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Boron Nitride Ceramics

Hexagonal Boron Nitride has a microstructure similar to that of Graphite. In both materials this structure, made up of layers of tiny platelets, is responsible for excellent machinability and low-friction properties. we called hexagonal boron nitride (HBN) or white graphite.

Boron Nitride Ceramics

Material of Boron Nitride Ceramics

  • Pyrolytic Boron Nitride: 99.99% Boron Nitride*
  • 99 Boron Nitride: Boron Nitride + Boric Oxide(B2O3)
  • CABN: Boron Nitride + Calcium Borate
  • ALBN: Boron Nitride + Al2BO3
  • ZRBN: Boron Nitride + Zirconium Oxide + Boric Oxide(B2O3)
  • ZABN: Boron Nitride + Zirconium Oxide + Aluminum Nitride + Al2BO3
  • SCBN: Boron Nitride + Silicon Carbon + Al2BO3

Processing of Boron Nitride Ceramics

  • Hot Pressed Sintering
  • Chemical Vapor Deposition

Applications of Boron Nitrides Ceramics

  • Thermal Management
    Excellent electrical insulation and thermal conductivity makes BN very useful as a heat sink in high power electronic applications. Its properties compare favorably with beryllium oxide, aluminum oxide and other electronic packaging materials, and easier machinable to desired shapes and sizes .
  • High Temperature Environments
    Temperature stability and excellent resistance to thermal shock makes BN as the ideal material in the toughest high temperature environments such as equipment for plasma arc welding, diffusion source wafers, and semiconductor crystal growth equipment & processing.
  • Molten Metal Handling
    BN is inorganic, inert, nonreactive with halide salts and reagents, and is not wet by most molten metals and slags. These characteristics, combined with low thermal expansion, make it ideal for interface materials used in various molten metal processes.

Comparsion of Boron Nitride Ceramics

Grade BN99 CABN ALBN ZRBN ZABN SCBN
Compositions BN>98.5% BN>97.5% AlN+BN ZrO2+BN ZrO2+AlN+BN SiC+BN
Binder B2O3 CaB2O3 AlBO3 B2O3 AlBO3 AlBO3
Density(g/cm3) 1.95~2.0 2.0~2.1 2.6 2.9~3.0 3.2~3.3 2.4~2.6
25°CVolume Resistivity
(Ω·cm)
>1014 >1013 >1014 >1012 >1012 >1012
Max. Service Temp. (°C)Oxygen
Inert Gas
High Vacuum
900
2400
2200
900
2400
2200
900
2100
1900
1000
1800
1800
900
1800
1800
900
1700
1700
Three-point
Flexural Strength(Mpa)
30 70 130 120 130 91
Compressive Strength(Mpa) 100 100 250 280 300 300
Coefficient of Thermal Expansion
25~1000
°C (10-6/K)
1.5 2.0 4.5 5.0 5.0 4.0
Thermal Conductivity (W/mK) 15 20 50 20 40 40
High Temp. Furnace Accessories
(High Temp Insulator Parts)
v v v
Metal Evaporation Crucible v v v
Accessories for Melting Metals and Glasses v v v v v
Mould Parts for Noble Metals and Special Alloys Casting v v v v v v
High Temperature High-Loaded Supporting Components v v v v
Transfer Tube and Nozzle for Melting Metals. x x x x x