Oxidation induced decomposition of YBa2Cu3O7-x
At low oxygen potentials, YBa2Cu3O7−x decomposes by chemical reactions involving reduction. The results of this study show that the compound also decomposes at higher oxygen potentials. The initial decomposition products were found to be Y2BaCuO5 and a Ba-Cu oxide phase. The Ba-Cu phase was found to...
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| Veröffentlicht in: | Journal of applied physics 1991-07, Vol.70 (2), p.906-913 |
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| container_title | Journal of applied physics |
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| creator | WILLIAMS, R. K ALEXANDER, K. B BRYNESTAD, J HENSON, T. J KROEGER, D. M LINDEMER, T. B MARSH, G. C SCARBROUGH, J. O SPECHT, E. D |
| description | At low oxygen potentials, YBa2Cu3O7−x decomposes by chemical reactions involving reduction. The results of this study show that the compound also decomposes at higher oxygen potentials. The initial decomposition products were found to be Y2BaCuO5 and a Ba-Cu oxide phase. The Ba-Cu phase was found to be a peroxide-type and the decomposition can be described by a chemical reaction involving oxidation: 4(YBa2Cu3O7−x)+(1/2 − 3/2δ +2x)O2⇄2Y2BaCuO5+3Ba2Cu3O6−δ+CuO. At 800 °C the equilibrium pressure for this reaction is slightly |
| doi_str_mv | 10.1063/1.349597 |
| format | Article |
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B ; BRYNESTAD, J ; HENSON, T. J ; KROEGER, D. M ; LINDEMER, T. B ; MARSH, G. C ; SCARBROUGH, J. O ; SPECHT, E. D</creator><creatorcontrib>WILLIAMS, R. K ; ALEXANDER, K. B ; BRYNESTAD, J ; HENSON, T. J ; KROEGER, D. M ; LINDEMER, T. B ; MARSH, G. C ; SCARBROUGH, J. O ; SPECHT, E. D</creatorcontrib><description>At low oxygen potentials, YBa2Cu3O7−x decomposes by chemical reactions involving reduction. The results of this study show that the compound also decomposes at higher oxygen potentials. The initial decomposition products were found to be Y2BaCuO5 and a Ba-Cu oxide phase. The Ba-Cu phase was found to be a peroxide-type and the decomposition can be described by a chemical reaction involving oxidation: 4(YBa2Cu3O7−x)+(1/2 − 3/2δ +2x)O2⇄2Y2BaCuO5+3Ba2Cu3O6−δ+CuO. At 800 °C the equilibrium pressure for this reaction is slightly <1 bar, and the enthalpy change is ∼80-kJ/mol Y123. This result is not consistent with the conclusions drawn from some other studies of the stability of the superconducting Y-Ba-Cu-O compounds, and the differences are discussed.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.349597</identifier><identifier>CODEN: JAPIAU</identifier><language>eng</language><publisher>Woodbury, NY: American Institute of Physics</publisher><subject>Chemistry ; Exact sciences and technology ; Inorganic chemistry and origins of life ; Kinetics and mechanism of reactions</subject><ispartof>Journal of applied physics, 1991-07, Vol.70 (2), p.906-913</ispartof><rights>1992 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c186t-f2ab69c2d993acf793157234a42848b2ca0410afe864788826cb91421c6ac3ad3</citedby><cites>FETCH-LOGICAL-c186t-f2ab69c2d993acf793157234a42848b2ca0410afe864788826cb91421c6ac3ad3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=5147819$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>WILLIAMS, R. 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At 800 °C the equilibrium pressure for this reaction is slightly <1 bar, and the enthalpy change is ∼80-kJ/mol Y123. This result is not consistent with the conclusions drawn from some other studies of the stability of the superconducting Y-Ba-Cu-O compounds, and the differences are discussed.</description><subject>Chemistry</subject><subject>Exact sciences and technology</subject><subject>Inorganic chemistry and origins of life</subject><subject>Kinetics and mechanism of reactions</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1991</creationdate><recordtype>article</recordtype><recordid>eNo9j01LxDAURYMoWEfBn9CFCzeteUma5C21-AUD3ejCVXlNGojMtKWZgfHfO1pxdeFyuJfD2DXwEriWd1BKhRWaE5YBt1iYquKnLONcQGHR4Dm7SOmTcwArMWNlc4iednEc8jj4vet97ns3bqcxxd92DPnHA4l6LxtTHC7ZWaBN6q_-csXenx7f6pdi3Ty_1vfrwoHVuyII6jQ64REluWBQQmWEVKSEVbYTjrgCTqG3WhlrrdCuQ1ACnCYnycsVu1123TymNPehnea4pfmrBd7-eLbQLp5H9GZBJ0qONmGmwcX0z1dwfACU3ysyT1M</recordid><startdate>19910715</startdate><enddate>19910715</enddate><creator>WILLIAMS, R. K</creator><creator>ALEXANDER, K. 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D</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>WILLIAMS, R. K</au><au>ALEXANDER, K. B</au><au>BRYNESTAD, J</au><au>HENSON, T. J</au><au>KROEGER, D. M</au><au>LINDEMER, T. B</au><au>MARSH, G. C</au><au>SCARBROUGH, J. O</au><au>SPECHT, E. D</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Oxidation induced decomposition of YBa2Cu3O7-x</atitle><jtitle>Journal of applied physics</jtitle><date>1991-07-15</date><risdate>1991</risdate><volume>70</volume><issue>2</issue><spage>906</spage><epage>913</epage><pages>906-913</pages><issn>0021-8979</issn><eissn>1089-7550</eissn><coden>JAPIAU</coden><abstract>At low oxygen potentials, YBa2Cu3O7−x decomposes by chemical reactions involving reduction. The results of this study show that the compound also decomposes at higher oxygen potentials. The initial decomposition products were found to be Y2BaCuO5 and a Ba-Cu oxide phase. The Ba-Cu phase was found to be a peroxide-type and the decomposition can be described by a chemical reaction involving oxidation: 4(YBa2Cu3O7−x)+(1/2 − 3/2δ +2x)O2⇄2Y2BaCuO5+3Ba2Cu3O6−δ+CuO. At 800 °C the equilibrium pressure for this reaction is slightly <1 bar, and the enthalpy change is ∼80-kJ/mol Y123. This result is not consistent with the conclusions drawn from some other studies of the stability of the superconducting Y-Ba-Cu-O compounds, and the differences are discussed.</abstract><cop>Woodbury, NY</cop><pub>American Institute of Physics</pub><doi>10.1063/1.349597</doi><tpages>8</tpages></addata></record> |
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| subjects | Chemistry Exact sciences and technology Inorganic chemistry and origins of life Kinetics and mechanism of reactions |
| title | Oxidation induced decomposition of YBa2Cu3O7-x |
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