BLACK-SYSTEM ZIRCONIA SINTERED MATERIAL HAVING HIGH STRENGTH AND PRODUCTION THEREOF

Title:

BLACK-SYSTEM ZIRCONIA SINTERED MATERIAL HAVING HIGH STRENGTH AND PRODUCTION THEREOF

Document Type and Number:

Japanese Patent JPH04114964

Kind Code:

A

Abstract:

PURPOSE: To form a colored zirconia sintered material having high strength and clear color of black or a dark color of almost black by combining ZrO2, stabilizer, Mn3O4, Al2O3 and at least a species of oxide selected from CoO, Cr2O3, Fe2O3 and TiO2 in a specific ratio.

CONSTITUTION: The aimed black-system zirconia sintered material is composed of 98-67mol% ZrO2, 1.5-26mol% stabilizer, 0.3-1.5mol% MnO4/3, 0.1-3.5mol% Al2O3 and 0.1-2.0mol% at least a species of oxide selected from CoO, Cr2O3, Fe2O3 and TiO2. Besides, said sintered material is obtained by following method: namely, a Mn compound giving an oxide after sintering, Al2O3 or an Al compound giving Al2O3 after sintering and at least a species of compound selected from a group of Co compound, Cr compound, Fe compound and Ti compound giving oxide by sintering are added to zirconia powder containing stabilizer and molded, then sintered.

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Inventors:

OKAMURA HIROMICHI
OSHIMA YOSHIAKI
KIMURA NOBUO

Application Number:

JP23434490A

Publication Date:

April 15, 1992

Filing Date:

September 06, 1990

Export Citation:

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Assignee:

NIPPON SODA CO

International Classes:

C04B35/48; (IPC1-7): C04B35/48

Attorney, Agent or Firm:

Eiji Saegusa (2 others)

Previous Patent: JPS4114963

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