Kabushiki Kaisha Riken

Kazuhiro Takahashi

Hideyuki Kurosawa

Yukio Nakanouchi

Tetsuo Uchiyama

A limiting current-type oxygen sensor including (a) a pair of oxygen ion-permeable substrates made of a zirconia solid electrolyte; (b) at least one diffusion pore provided in at least one of the substrates, which extends substantially along the thickness of the substrate for causing oxygen diffusion through the diffusion pore to be a rate-determining step; (c) a sealing member for fixing the pair of substrates such that a closed chamber is defined between the substrates; and (d) a pair of porous electrodes provided on both outer and inner surfaces of each electrode.

Limiting current-type oxygen sensor

A limiting current-type oxygen sensor including (a) an oxygen ion-permeable substrate made of a zirconia solid electrolyte having a gas diffusion pore extending between first and second surfaces of the substrate for rate determination by oxygen diffusion through the pore; (b) a first porous electrode formed on the first surface of the substrate in an area including an opening of the gas diffusion pore; (c) a second porous electrode formed on the second surface of the substrate such that it is opposite to the first porous electrode via the substrate; (d) a sealing member fixed to the second surface of the substrate for sealing the second porous electrode such that the internal chamber is defined on the second porous electrode; and (e) a heating means mounted to the sealing member.

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Kumagaya, Japan

Kazuhiro Takahashi