Title:
【発明の名称】微細粒の炭化物を含む緻密な窒化ケイ素セラミック
Document Type and Number:
Japanese Patent JP3092800
Kind Code:
B2
Abstract:
This invention relates to a sintered silicon nitride ceramic material comprising:a) at least 80 wt% silicon nitride grains, andb) between 0.1 and 5 wt% additive grains characterized by at least one of :i)a Knoop hardness of at least 25 GPa,ii) a coefficient of thermal expansion of at least 6 x 10-6/K, andiii) a modulus of elasticity of at least 600 GPa, wherein the maximum detectable grain size of the additive grains is no more than 4 um, as determined by a photomicrograph of a polished 75 mm2 microstructure of the silicon nitride material.
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Inventors:
Bimar Pujali
William collins
William collins
Application Number:
JP11936999A
Publication Date:
September 25, 2000
Filing Date:
April 27, 1999
Export Citation:
Assignee:
Saint-Gobain Industrial Ceramics, Incorporated
International Classes:
C04B35/584; C04B35/593; (IPC1-7): C04B35/584
Domestic Patent References:
| JP4295056A | ||||
| JP9100167A |
Attorney, Agent or Firm:
Takashi Ishida (4 others)