Title:
CERAMIC HEATER AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JP3594161
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the heating efficiency of a ceramic heater to be used as an impregnation type electric heater for molten metal.
SOLUTION: This ceramic heater is a sintered body formed by integrally laminating an intermediate layer (3) as a heating wire made of ceramic or high melting-point metal and a base layer (2) made of silicon nitride group ceramic and for coating the intermediate layer for protection. The base layer (2) is desirably formed at 90% or more of relative density, and the intermediate layer (3) is desirably formed at about 10μm or less of particle diameter and at 50% or more of relative density. A surface of a green compact layer (21) of silicon nitride group ceramic is formed with a groove (g) so as to obtain a compact (S1), and thereafter, a green compact layer (30) of ceramic or high melting point metal powder as the heating wire forming raw material is provided in the groove (g) so as to obtain a compact (S2), and a green compact layer (22) of silicon nitride group ceramic for coating the green compact layer (30) is laminated on the surface of the compact (S2) so as to obtain a compact (S3), and the compact (S3) is sintered so as to manufacture a ceramic heater.
Inventors:
Hiroshi Yamaguchi
Takahiro Gama
Jiro Tsuchida
Takahiro Gama
Jiro Tsuchida
Application Number:
JP24957496A
Publication Date:
November 24, 2004
Filing Date:
September 20, 1996
Export Citation:
Assignee:
Kubota Corporation
International Classes:
H05B3/14; F27D11/02; H05B3/18; H05B3/66; (IPC1-7): H05B3/14; F27D11/02; H05B3/18; H05B3/66
Domestic Patent References:
| JP5343162A | ||||
| JP5021276Y2 | ||||
| JP8001595Y2 | ||||
| JP5132726A | ||||
| JP60033265A | ||||
| JP62260772A | ||||
| JP4065361A | ||||
| JP63201063A | ||||
| JP7326468A |
Attorney, Agent or Firm:
Shinhachiro Miyazaki