G - Physics
01
N
324/25
G01N 27/406 (2006.01)
Patent
CA 1227539
- 1 - Abstract The present invention relates to an oxygen sensor which is suited for measuring the concentration of an oxygen gas contained in an exhaust gas of an automobile. The sensor is comprised of a cell and a heater which is mounted for heating the cell. The heater, includes an electrically insulated substrate and a heating element embedded in the substrate. The substrate has a recess on one surface thereof and a pair of side wall portions formed by forming the recess. The cell comprises a solid- electrolyte body, a detection electrode, a reference electrode and a chamber enclosing the reference electrode except for its opening. The cell is disposed in the recess of the heater and joined to the heater with an intermediate layer which is disposed between the cell and the heater and sintered. The intermediate layer has a number of fine cracks and an intermediate thermal expansion coefficient between those of the solid-electrolyte and the substrate.
500035
Hitachi Ltd.
Kirby Eades Gale Baker
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