Solid electrolyte gas sensor

Details Solid electrolyte gas sensor Solid electrolyte gas sensor

1994-04-26

1996-01-09

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

20415314, 20415318, 20415319, 204421, 204424, 204426, 205324, 264 56, 427431, G01N 27407

Patent

active

054826098

ABSTRACT:
A solid electrolyte gas sensor comprising: a base plate of a solid electrolyte, on which are disposed a detecting electrode for detecting a selected gas, a reference electrode, and a conductor portion for external connection such as an outer lead.
A process of producing a joined body of a ceramic member and a hard-to-sinter oxyacid salt crystal, the process comprising the steps of: impregnating a melt of a hard-to-sinter oxyacid salt such as a sulphate or a carbonate into a porous ceramic plate having micropores extending through the entire thickness thereof; then cooling the impregnated ceramic plate to form a composite plate composed of the ceramic plate with the micropores filled with a crystal of the hard-to-sinter oxyacid salt; and joining the composite plate to a ceramic base.
A process of producing a hard-to-sinter oxyacid salt crystal on, and joined to, a ceramic base, the process comprising the steps of: forming a metal film on a ceramic base; anodizing the metal film to form a porous oxide film having numerous micropores extending through the entire thickness thereof; melting a hard-to-sinter oxyacid salt such as a sulphate or a carbonate on the porous oxide film, thereby causing the porous oxide film to be impregnated with a melt of the salt; and then cooling the ceramic base, together with the oxide film, to form a crystal of the hard-to-sinter oxyacid salt joined to the ceramic base.

REFERENCES:
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S. Yao et al., "Solid Electrolyte Carbon Dioxide Sensor Using Sodium-Ion Conductor and Li.sub.2 CO.sub.3 -BaCO.sub.3 Electrode", Jpn. J. Appl. Phys. vol. 31, pp. L197-L199.(Feb. 15, 1992).
Y. Yan et al., "Solid State Sensor for Sulfur Oxides Based on Stabilized Zirconia and Metal Sulphate", Chemistry Letter, pp. 635-638, (1992) month unavailable.

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