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Patent Searching and Data


Title:
CERAMIC SINTERED BODY, AND MEMBER FOR HEAT TREATMENT
Document Type and Number:
Japanese Patent JP2014024740
Kind Code:
A
Abstract:

To provide: a ceramic sintered body that is excellent in corrosion resistance against an alkaline composition of compositions composing a positive electrode material of a lithium ion secondary battery and thermal shock resistance; a member for heat treatment using the same.

A ceramic sintered body of this invention is a ceramic sintered body that includes: exceeding 50 mass% and at most 93 mass% of magnesium oxide; and at least 7 mass% and less than 50 mass% of a metallic acid magnesium, wherein, in an observation region where the ceramic sintered body is observed in a cross-sectional view, an area ratio of a crystal of the magnesium oxide having a crystal grain size of at most 0.3 mm is at least 55 area%, and an area ratio of a crystal of the metallic acid magnesium having a crystal grain size of at least 0.5 mm is at least 4 area%. By the configuration, a lot of fine crystals of the magnesium oxide exist, thereby anticorrosion becomes high, the magnesium oxide is easily located between large crystals of the metallic acid magnesium, rising of a coefficient of linear expansion is suppressed, thereby thermal shock resistance becomes high, and anticorrosion and thermal shock resistance can be combined.


Inventors:
KUBO KEITA
YAMAGUCHI SHINICHI
NISHIKAWA YUSUKE
Application Number:
JP2012168585A
Publication Date:
February 06, 2014
Filing Date:
July 30, 2012
Export Citation:
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Assignee:
KYOCERA CORP
International Classes:
C04B35/043; C21D1/00; F27B5/10; F27B14/10; F27D21/00