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Title:
CERAMIC HEATER ELEMENT, CERAMIC HEATER, AND GLOW PLUG
Document Type and Number:
WIPO Patent Application WO/2012/073476
Kind Code:
A1
Abstract:
A ceramic heater element (10) comprises an insulating base (101) and a heat generating resistor body (102) that is buried in the insulating base (101). The insulating base (101) has β-SiAlON or multiphase SiAlON of β-SiAlON and α-SiAlON as the main phase, and comprises a grain boundary phase that contains a rare earth element and a silicide of at least one element selected from among Cr, W, Mo, V and Fe. The heat generating resistor body (102) has a conductive compound as the main phase, said conductive compound being composed of at least one substance selected from among a silicide, nitride and carbide of Mo and a silicide, nitride and carbide of W, and comprises β-SiAlON or multiphase SiAlON of β-SiAlON and α-SiAlON and a grain boundary phase that contains a rare earth element.

Inventors:
SEKIGUCHI YUTAKA (JP)
IKAI YOSHIHITO (JP)
MITSUOKA TAKESHI (JP)
Application Number:
PCT/JP2011/006624
Publication Date:
June 07, 2012
Filing Date:
November 29, 2011
Export Citation:
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Assignee:
NGK SPARK PLUG CO (JP)
SEKIGUCHI YUTAKA (JP)
IKAI YOSHIHITO (JP)
MITSUOKA TAKESHI (JP)
International Classes:
H05B3/10; F23Q7/00; H05B3/14; H05B3/18; H05B3/48
Domestic Patent References:
WO2002044104A22002-06-06
Foreign References:
JP2009287920A2009-12-10
JP2005300046A2005-10-27
JP2006175561A2006-07-06
JPH03152893A1991-06-28
JP2007335397A2007-12-27
JPH0344632B21991-07-08
JP2006024394A2006-01-26
Other References:
See also references of EP 2648475A4
Attorney, Agent or Firm:
SAKURA PATENT OFFICE, p. c. (JP)
Patent business corporation cherry tree international patent firm (JP)
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Claims: