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Title:
MANUFACTURE OF SILICON NITRIDE-TYPE SINTERED BODY
Document Type and Number:
Japanese Patent JPH02124770
Kind Code:
A
Abstract:

PURPOSE: To obtain a high-strength silicon nitride-type sintered by separately adding a powdered silicon nitride material and specific two kinds of sintering auxiliaries to a surfactant-containing solvent, irradiating the above with ultrasonic waves to apply dispersion treatment, mixing and drying the above respective liquids, and then subjecting the resulting powder mixture to compacting and sintering.

CONSTITUTION: (A) a powdered raw material of silicon nitride, (B) a first sintering auxiliary consisting of organometallic salt (e.g., yttrium naphthenate), and (C) a second sintering auxiliary (e.g., Y2O3, AlN) consisting of one or more kinds selected from metal oxides, nitrides, and oxynitrides are prepared. Subsequently, respective components are added to a solvent containing surfactant (dispersant, deflocculant), independently or in combination of two or more, and the resulting mixture is irradiated with ultrasonic waves to undergo dispersion treatment. Then, respective liquids are mixed and dried, and the resulting powder mixture is compacted and sintered in a nonoxidizing atmosphere at 1600-2200°C, by which the silicon nitride-type sintered can be obtained.


Inventors:
NISHIOKA TAKAO
KUKIDAIRA HIROSHI
MATSUNUMA KENJI
TAKANO YOSHIE
HIGUCHI MATSUO
HONDA MASAAKI
MIYAKE MASAYA
Application Number:
JP1989000129357
Publication Date:
May 14, 1990
Filing Date:
May 22, 1989
Export Citation:
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Assignee:
SUMITOMO ELECTRIC INDUSTRIES
International Classes:
C04B35/584; C04B35/58; C04B35/626; (IPC1-7): C04B35/58