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Sintered boron nitride body and method for producing a sintered boron nitride body

R K GRAU / H J SCHWEIGER / R NGOUMENI YAPPI

The present invention provides a sintered, hexagonal boron nitride body (2a, 2b). The sintered, hexagonal boron nitride body is produced by at least one pressing process and subsequent sintering process from a powder (P) made of a hexagonal boron nitride, its density being deliberately set to a value of <1.6 g/cm3. Studies have shown that, due to the selection of this lower density, the boron nitride body (2a, 2b) exhibits very high isotropy, when compared with conventional hexagonal boron nitride bodies. This relates in particular to thermal conductivity and the coefficient of thermal expansion, which are also largely temperature-independent.

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Sintered boron nitride body and method for producing a sintered boron nitride body

R K GRAU / H J SCHWEIGER / R NGOUMENI YAPPI

The present invention provides a sintered, hexagonal boron nitride body (2a, 2b). The sintered, hexagonal boron nitride body is produced by at least one pressing process and subsequent sintering process from a powder (P) made of a hexagonal boron nitride, its density being deliberately set to a value of <1.6 g/cm3. Studies have shown that, due to the selection of this lower density, the boron nitride body (2a, 2b) exhibits very high isotropy, when compared with conventional hexagonal boron nitride bodies. This relates in particular to thermal conductivity and the coefficient of thermal expansion, which are also largely temperature-independent.

Sintered boron nitride body and method for producing a sintered boron nitride body

R K GRAU / H J SCHWEIGER / R NGOUMENI YAPPI

The present invention provides a sintered, hexagonal boron nitride body (2a, 2b). The sintered, hexagonal boron nitride body is produced by at least one pressing process and subsequent sintering process from a powder (P) made of a hexagonal boron nitride, its density being deliberately set to a value of <1.6 g/cm3. Studies have shown that, due to the selection of this lower density, the boron nitride body (2a, 2b) exhibits very high isotropy, when compared with conventional hexagonal boron nitride bodies. This relates in particular to thermal conductivity and the coefficient of thermal expansion, which are also largely temperature-independent.

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Title:

Sintered boron nitride body and method for producing a sintered boron nitride body

Contributors:

R K GRAU (author) / H J SCHWEIGER (author) / R NGOUMENI YAPPI (author)

Publication date:

2015-06-03

Type of media:

Patent

Type of material:

Electronic Resource

Language:

English

Classification:

IPC: C04B Kalk , LIME

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