Title:
MECHANICAL SEAL
Document Type and Number:
Japanese Patent JPS6018667
Kind Code:
A
Abstract:
PURPOSE:To improve the durability of a mechanical seal by adopting a sintered material which is constituted with 5-70mol% of zirconia possessing the tetragonal crystalline structure and remaining percent of zirconia possessing the cubic crystalline structure. CONSTITUTION:A mechanical seal is constituted with sintered zirconia possessing specific crystalline structure. In said zirconia, zirconia of cubic system and zirconia of tetragonal system coexist by making a solid solution with an oxide stabilizer, e.g. calcia, yttria, or ytterbia. Said sintered solid contains 5-70mol% of tetragonal zirconia. By this constitution, the elastic strain energy can be reduced as the tetragonal crystalline structure is transformed to the monoclinic crystalline structure even when said mechanical seal receives a mechanical energy.
Inventors:
MASAKI YOSHIKI
KOBAYASHI KEISUKE
KOBAYASHI KEISUKE
Application Number:
JP8368184A
Publication Date:
January 30, 1985
Filing Date:
April 27, 1984
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
C04B35/48; F16J15/34; (IPC1-7): F16J15/34; C04B35/48
Domestic Patent References:
| JPS3726923Y1 |
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