Stratified ceramic body, oxygen sensor using the same and fabric

Details Stratified ceramic body, oxygen sensor using the same and fabric Stratified ceramic body, oxygen sensor using the same and fabric

1995-04-19

1996-06-04

Bell, Bruce F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204426, 427124, 427125, 4271262, 4271263, 4271264, 428570, 428212, 4283044, 501 81, G01N 2726

Patent

active

055229794

ABSTRACT:
An oxygen sensor has alumina porous layer on a surface of a solid electrolyte to cover electrodes and the alumina porous layer is simultaneously baked with the solid electrolyte. The alumina porous layer has baking contraction percentage which is the same range of the solid electrolyte. Alumina powder which is a starting material of the alumina porous layer includes 0.3 to 0.5 .mu.m of a 50% grain size, 0.4 to 1.1 .mu.m of a 70% grain size, and 0.8 to 4.0 .mu.m of a 90% grain size in a grain size distribution of weight integration frequency and further a specific surface area according to a BET method is approximately 8.5 to 11.0 m.sup.2 /g. It is preferable that the baking contraction percentages of the solid electrolyte and alumina porous layer are approximately 16 to 22%.

REFERENCES:
patent: 4582657 (1986-04-01), Shibata et al.
patent: 5110442 (1992-05-01), Kojima et al.
patent: 5171721 (1992-12-01), Nanataki et al.

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