Ceramic heater for oxygen sensor of the type having oxygen ion c

Details Ceramic heater for oxygen sensor of the type having oxygen ion c Ceramic heater for oxygen sensor of the type having oxygen ion c

1994-07-22

1995-09-19

Reynolds, Bruce A.

Electric heating

Heating devices

With heating unit structure

219544, 219553, 338 34, 338307, 338308, 338309, H05B 344, H05B 348

Patent

active

054517486

ABSTRACT:
In an oxygen sensor of the type having an oxygen ion conductive tube of solid electrolyte, a ceramic heater disposed within the oxygen ion conductive tube for heating the same is in the form of a quadrangular prism or a bar of a rectangular cross section. The ceramic heater is formed by piling up ceramic green sheets with metallic thick-film patterns for heat generating resistors interposed between adjacent two of the ceramic green sheets. The ceramic heater is so shaped as to satisfy the relation of b/a=0.75.about.1 where "a" is the width and "b" is the thickness of the ceramic heater. The metallic thick films, which the metallic thick-film patterns are turned to by firing, are arranged so as to be parallel to the side surfaces opposed in the thickness direction of the ceramic heater.

REFERENCES:
patent: 4414531 (1983-11-01), Novak
patent: 4507191 (1985-03-01), Ebizawa et al.
patent: 4528086 (1985-07-01), Kato et al.
patent: 4591423 (1986-05-01), Kato et al.
patent: 4656863 (1987-04-01), Takami et al.
patent: 4660407 (1987-04-01), Takami et al.
patent: 4697165 (1987-09-01), Ishiguro et al.
patent: 4883947 (1989-11-01), Murase et al.
patent: 5264181 (1993-11-01), Nozaki et al.

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