{"created":"2021-03-01T06:07:58.870901+00:00","id":4192,"links":{},"metadata":{"_buckets":{"deposit":"dc0ffa3b-b900-4617-80e6-ee84be2ece6f"},"_deposit":{"id":"4192","owners":[],"pid":{"revision_id":0,"type":"depid","value":"4192"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00004192","sets":["423:424:425","453:454"]},"item_5_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Solid State Reaction between Y_2O_3 and Nb_2O_5"}]},"item_5_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1978-01","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"5","bibliographicPageStart":"1","bibliographicVolumeNumber":"86","bibliographic_titles":[{"bibliographic_title":"窯業協會誌"},{"bibliographic_title":"窯業協會誌","bibliographic_titleLang":"en"}]}]},"item_5_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"相対密度の異なる2種のY_2O_3晶焼結体(70%，95%)とNb_2O_5焼結体とを重ね合わせて，2種の拡散対とし，1275〜1350℃で加熱してY_2O_3‐Nb_2O_5系固相反応を調べた.その境界面に生成する反応層を電子顕微鏡観察，X線マイクロアナライザー分析，X線回折及び熱膨張率測定することにより次のような結果を得た.Y_2O_3層とNb_2O_5層の境界面においてY_2O_3・Nb_2O_5なる反応層が生成する.これはY_2O_3中へのNb_2O_5Oの一方拡散に起因するものである.この拡散反応の活性化エネルギーは70%Y_2O_3で150kcal/mol，95%Y_2O_5で200kcal/molとなった.また1350℃では反応層中に50〜55mol%範囲での濃度勾配が認められた.反応属とNb_2O_5層は，はく離したが，これは熱膨張率の差によることが判明した.","subitem_description_type":"Abstract"},{"subitem_description":"Solid state reactions between sintered Y_ 2O_3 and Nb_2O_5 have been studied from 1275℃ to 1350℃, in which two kinds of sintered Y_2O_3, 70 and 95% dense, were employed. Techniques used were electron microscopy, EPMA., X-ray diffraction and dilatometry. A layer of Y_2O_3・Nb_2O_5 formed at the Y_2O_3-Nb_2O_5 interface, of which growth was controlled by the one-way diffusion of Nb_2O_5 across the product layer. The apparent activation energies of the diffusion for 70% and 95% dense Y_2O_3 are 150 and 200 kcal/mol, respectively. EPMA of 1350℃-specimen showed the concentration gradient of Nb across the reaction layer ranging from 50 to 55 mol% of Nb_2O_5 increasing towards the Y_2O_3・Nb_2O_5-Nb_2O_5 interface. The observed separation of diffusion couples is probably due to the difference of thermal expansion coefficients between the product and Nb_2O_5.","subitem_description_type":"Abstract"}]},"item_5_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"48006","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Hotta, Noriyasu"}]},{"nameIdentifiers":[{"nameIdentifier":"48007","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Matsushita, Yasuhiko"}]},{"nameIdentifiers":[{"nameIdentifier":"48008","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Matsuo, Shigetomo"}]}]},"item_5_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"窯業協会"}]},"item_5_relation_31":{"attribute_name":"異版である","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"http://ci.nii.ac.jp/naid/110002309793","subitem_relation_type_select":"URI"}}]},"item_5_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"日本セラミックス協会"},{"subitem_rights":"本文データは学協会の許諾に基づきCiNiiから複製したものである"}]},"item_5_select_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_select_item":"publisher"}]},"item_5_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00245650","subitem_source_identifier_type":"NCID"}]},"item_5_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00090255","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"堀田, 憲康"}],"nameIdentifiers":[{"nameIdentifier":"48003","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"松下, 泰彦"}],"nameIdentifiers":[{"nameIdentifier":"48004","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"松尾, 重友"}],"nameIdentifiers":[{"nameIdentifier":"48005","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2019-07-30"}],"displaytype":"detail","filename":"110002309793.pdf","filesize":[{"value":"712.9 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"110002309793.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/4192/files/110002309793.pdf"},"version_id":"0033cd22-9c20-4e9c-8793-8d41ef7fd6d1"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Y_2O_3Nb_2O_5系の固相反応","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Y_2O_3Nb_2O_5系の固相反応"},{"subitem_title":"Y_2O_3Nb_2O_5系の固相反応","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["454","425"],"pubdate":{"attribute_name":"公開日","attribute_value":"2009-04-08"},"publish_date":"2009-04-08","publish_status":"0","recid":"4192","relation_version_is_last":true,"title":["Y_2O_3Nb_2O_5系の固相反応"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:37:12.304313+00:00"}