EP 0650020 A2 19950426 - A ceramic heater and a method of manufacture thereof.
Title (en)
A ceramic heater and a method of manufacture thereof.
Title (de)
Keramisches Heizelement und Herstellungsverfahren dafür.
Title (fr)
Elément chauffant céramique et son procédé de fabrication.
Publication
Application
Priority
- JP 28420393 A 19931020
- JP 28420493 A 19931020
Abstract (en)
This invention provides a ceramic heater of current self-control type, which has no gap in the boundary between the enclosure 1 and the filler 2, and which has reduced manufacturing cost, a stable strength and an improved heating performance. The invention also provides a method of manufacturing such a ceramic heater. In this ceramics heater, porous ceramic fillers 2, 3 are filled inside the end portions of the enclosure 1 made of a dense ceramics. The metal coil 10 consisting of the heater coil 6 and the current control coil 9 connected in series with each other is installed inside the enclosure 1, with the end surfaces 15 of the enclosure 1 hermetically closed by the sealing films 4. To prevent corrosion of the metal coil 10, the low heat conductivity ceramics 25 made from ceramic whiskers and/or ceramic powder is disposed in the central portion of the enclosure 1 and an N2 gas is sealed therein. The heater coil 6 is arranged in contact with the inner wall surface 7 of that portion of the enclosure 1 where the filler 2 is located, and the current control coil 9 is spaced from the inner wall surface 8 of the enclosure 1 so as to be heat-insulated. <IMAGE>
IPC 1-7
IPC 8 full level
F23Q 7/00 (2006.01)
CPC (source: EP)
F23Q 7/001 (2013.01); F23Q 2007/004 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0650020 A2 19950426; EP 0650020 A3 19960605; EP 0650020 B1 19990407; DE 650020 T1 19960502; DE 69417676 D1 19990512; DE 69417676 T2 19990930
DOCDB simple family (application)
EP 94307544 A 19941014; DE 69417676 T 19941014; DE 94307544 T 19941014