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Boron phosphide

Chemical compound From Wikipedia, the free encyclopedia

Boron phosphide
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Boron phosphide (BP) (also referred to as boron monophosphide, to distinguish it from boron subphosphide, B12P2) is a chemical compound of boron and phosphorus. It is a semiconductor.[3]

Quick Facts Identifiers, Properties ...
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History

Crystals of boron phosphide were synthesized by Henri Moissan as early as 1891.[4]

Appearance

Pure BP is almost transparent, n-type crystals are orange-red whereas p-type ones are dark red.[5]

Chemical properties

BP is not attacked by acids or boiling aqueous alkali water solutions. It is only attacked by molten alkalis.[5]

Physical properties

BP is known to be chemically inert and exhibit very high thermal conductivity.[2] Some properties of BP are listed below:

  • lattice constant 0.45383 nm
  • coefficient of thermal expansion 3.65×10−6 /°C (400 K)
  • heat capacity CP ~ 0.8 J/(g·K) (300 K)
  • Debye temperature = 985 K
  • Bulk modulus 152 GPa
  • relatively high microhardness of 32 GPa (100 g load).
  • electron and hole mobilities of a few hundred cm2/(V·s) (up to 500 for holes at 300 K)
  • high thermal conductivity of ~ 460 W/(m·K) at room temperature[2]
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See also

References

Further reading

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