Reference electrode for oxygen probe
AssigneeNisshin Steel Co., Ltd.
InventorsYoshio Nakajima, Takaharu Moriya, Hajime Nakamura, Koji Omosako, Yoshio Tokuta
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Abstract
In the reference electrode for the oxygen probe comprising a mixture of Cr powder and Cr.sub.2 O.sub.3 powder, an improved reference electrode characterized in that Cr powder and Cr.sub.2 O.sub.3 powder are mixed in a ratio 97%:3% to 80%:20% and the mixture is sintered beforehand. An oxygen probe using this electrode exhibits improved response, stability and reproducibility in molten steel.
Claims10
In a method of making a reference electrode of a mixture of Cr powder and Cr.sub.2 O.sub.3 powder for an oxygen probe, the improvement comprising mixing the Cr powder and Cr.sub.2 O.sub.3 powder in a ratio of 97%:3% to 80%:20% by weight, sintering the mixture at a temperature not lower than 1550.degree. C. in an oxygen free atmosphere and pulverizing said sintered mixture.
In an oxygen probe including a reference electrode formed of a mixture of Cr powder and Cr.sub.2 O.sub.3 powder, the improvement comprising said Cr powder and Cr.sub.2 O.sub.3 powder present in a ratio of 97%:3% to 80%:20% by weight, said powders being presintered at a temperature not lower than 1550.degree. C. in an oxygen free atmosphere and thereafter pulverized to form said mixture.
Dependencies are inferred from the claim text.