A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
MANUFACTURING METHOD OF PROTON CONDUCTIVE CERAMIC AND PROTON CONDUCTIVE CERAMIC
PROBLEM TO BE SOLVED: To provide a manufacturing method of a proton conductive ceramic usable as a sensor element of a hydrogen gas sensor capable of measuring hydrogen partial pressure of a measurement object phase with simpler constitution without needs for standard gas with known hydrogen partial pressure.SOLUTION: There is provided a sintered body of metal multiplex oxide having a perovskite type crystal structure represented by the composition formula ABMO, where A is an alkali earth metal, B is a metal with +4 valency, M is a transition metal capable of having at least two valencies of +4 valent or less. There is provided a manufacturing method of a proton conductive ceramic consisting of the sintered body of metal oxide including burning whole of a molded body of the metal multiple oxide obtained from a starting raw material containing a metal A, a metal B and a metal M in reduction environment, then oxidation treating a part of an edge surface of the sintered body and unevenly distributing a high conductive layer exhibiting proton conductivity by the metal M substituting the metal B and a low conductive layer having higher valency of the metal M than the higher conductive layer and lower proton conductivity than the high conductive layer.SELECTED DRAWING: None
【課題】水素分圧が既知である基準ガスを必要とすることなく、測定対象相の水素分圧をより簡易な構成で測定できる水素ガスセンサのセンサ素子として使用可能なプロトン伝導性セラミックスの製造方法の提供。【解決手段】組成式ＡＢ１−ｂＭｂＯ３−α（Ａはアルカリ土類金属、Ｂは価数が＋４価の金属、Ｍを＋４価以下の少なくとも二つの価数を取り得る遷移金属）で表されるペロブスカイト型の結晶構造を有する金属複酸化物の焼結体。金属Ａ、金属Ｂ、及び金属Ｍを含む出発原料から得た金属複酸化物の成形体の全体を、還元性雰囲気で焼成して焼結体とした後、焼結体の端面の一部を酸化処理して、金属Ｂと置換した金属Ｍによるプロトン伝導性を示す高伝導層と、高伝導層より金属Ｍの価数が大きく高伝導層よりプロトン伝導性が低い低伝導層とを偏在させる、金属酸化物の焼結体からなるプロトン伝導性セラミックスの製造方法。【選択図】なし
MANUFACTURING METHOD OF PROTON CONDUCTIVE CERAMIC AND PROTON CONDUCTIVE CERAMIC
PROBLEM TO BE SOLVED: To provide a manufacturing method of a proton conductive ceramic usable as a sensor element of a hydrogen gas sensor capable of measuring hydrogen partial pressure of a measurement object phase with simpler constitution without needs for standard gas with known hydrogen partial pressure.SOLUTION: There is provided a sintered body of metal multiplex oxide having a perovskite type crystal structure represented by the composition formula ABMO, where A is an alkali earth metal, B is a metal with +4 valency, M is a transition metal capable of having at least two valencies of +4 valent or less. There is provided a manufacturing method of a proton conductive ceramic consisting of the sintered body of metal oxide including burning whole of a molded body of the metal multiple oxide obtained from a starting raw material containing a metal A, a metal B and a metal M in reduction environment, then oxidation treating a part of an edge surface of the sintered body and unevenly distributing a high conductive layer exhibiting proton conductivity by the metal M substituting the metal B and a low conductive layer having higher valency of the metal M than the higher conductive layer and lower proton conductivity than the high conductive layer.SELECTED DRAWING: None
【課題】水素分圧が既知である基準ガスを必要とすることなく、測定対象相の水素分圧をより簡易な構成で測定できる水素ガスセンサのセンサ素子として使用可能なプロトン伝導性セラミックスの製造方法の提供。【解決手段】組成式ＡＢ１−ｂＭｂＯ３−α（Ａはアルカリ土類金属、Ｂは価数が＋４価の金属、Ｍを＋４価以下の少なくとも二つの価数を取り得る遷移金属）で表されるペロブスカイト型の結晶構造を有する金属複酸化物の焼結体。金属Ａ、金属Ｂ、及び金属Ｍを含む出発原料から得た金属複酸化物の成形体の全体を、還元性雰囲気で焼成して焼結体とした後、焼結体の端面の一部を酸化処理して、金属Ｂと置換した金属Ｍによるプロトン伝導性を示す高伝導層と、高伝導層より金属Ｍの価数が大きく高伝導層よりプロトン伝導性が低い低伝導層とを偏在させる、金属酸化物の焼結体からなるプロトン伝導性セラミックスの製造方法。【選択図】なし
MANUFACTURING METHOD OF PROTON CONDUCTIVE CERAMIC AND PROTON CONDUCTIVE CERAMIC
プロトン伝導性セラミックスの製造方法及びプロトン伝導性セラミックス
TSUNEYOSHI KOJI (author) / TAKAHASHI SOKO (author) / OKUYAMA YUJI (author)
2017-06-29
Patent
Electronic Resource
Japanese
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