EP0144057A2
Expired / Lapsed
EP
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Apparatus for measuring oxygen concentration and method of producing the appartus
Assignee: Hitachi Ltd
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Filing: 1984-11-27
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Granted: —
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Expires: 2004-11-27
Abstract
Abstract An oxygen concentration measuring apparatus having two electrodes (12, 13) formed on respective sides of a thin plate of a solid electrolyte (11), one of the electrodes (12) being exposed to a diffusion chamber (16) having a diffusion aperture. The diffusion chamber (16) has a very small depth (h) and the diffusion aperture (24, 25) has a slit-like form extending laterally from the diffusior chamber (16), thereby attaining a good response characteristics of the oxygen concentration measuring apparatus Disclosed also is a method of producing this oxygen concentration measuring apparatus.
Inventors
- 👤 Seikoh Suzuki
- 👤 Masayuki Miki
- 👤 Takao Sasayama
- 👤 Toshitaka Suzuki
- 👤 Sadayasu Ueno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 15:20
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4071; G01N15/00; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; G05; G05D; G05D11/00; G05D11/02; G05D11/035; G05D11/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
An oxygen concentration measuring apparatus comprising: a zirconia slid electrolyte (11), a pair of electrodes (12, 13) formed on both sides of said zirconia solid electrolyte (11); a cover member (14) provided on said solid electrolyte (11) and encasing one (12) of said electrodes (12, 13); and a diffusion chamber (16) formed between said solid electrolyte (11) and said cover member (14) and provided with at least one gas diffusion groove (24, 25) in the form of a slit.
Claim 2
Dependent Claim
79 words
An oxygen concentration measuring apparatus comprising: a zirconia slid electrolyte (11), a pair of electrodes (12, 13) formed on both sides of said zirconia solid electrolyte (11); a cover member (14) provided on said solid electrolyte (11) and encasing one (12) of said electrodes (12, 13); and a diffusion chamber (16) formed between said solid electrolyte (11) and said cover member (14) and provided with at least one gas diffusion groove (24, 25) in the form of a slit.
Claim 3
Dependent Claim
37 words
An oxygen concentration measuring apparatus according to claim 1, wherein the width (W) of said gas diffusion groove (24, 25) is not smaller than 1/10 of the width (W * ) of said gas diffusion chamber (16).
Claim 4
Dependent Claim
30 words
An oxygen concentration measuring apparatus according to claim 1, wherein said gas diffusion groove (24, 25) and said gas diffusion chamber (16) are formed by an organic binder burning method.
Claim 5
Independent Claim
143 words
A method of producing an oxygen concentration measuring apparatus comprising the steps of: forming a first electrode (12) and a second electrode (13) on respective sides of a thin plate of a solid electrolyte (11) by printing; forming a layer of an organic binder (19) on one side of said solid electrolyte (11) so as to cover said first electrode (12); laminating a thin cover member (14) on the same side of said solid electrolyte (11) as said first electrode (12) thus forming a laminated structure; subjecting said laminated structure to a heat-and press-bonding at a high temperature; and raising the temperature of said laminated structure at a controlled rate to gradually burn said binder (19) so as to extinguish said binder thus forming a diffusion chamber (16) on said first electrode (12) between said cover member (14) and said solid electrolyte (11).
Claim 6
Independent Claim
143 words
A method of producing an oxygen concentration measuring apparatus comprising the steps of: forming a first electrode (12) and a second electrode (13) on respective sides of a thin plate of a solid electrolyte (11) by printing; forming a layer of an organic binder (19) on one side of said solid electrolyte (11) so as to cover said first electrode (12); laminating a thin cover member (14) on the same side of said solid electrolyte (11) as said first electrode (12) thus forming a laminated structure; subjecting said laminated structure to a heat-and press-bonding at a high temperature; and raising the temperature of said laminated structure at a controlled rate to gradually burn said binder (19) so as to extinguish said binder thus forming a diffusion chamber (16) on said first electrode (12) between said cover member (14) and said solid electrolyte (11).
References Cited (Backward Citations)
No citation records indexed.
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