{"_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": ["454", "425"]}, "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", "download_preview_message": "", "file_order": 0, "filename": "110002309793.pdf", "filesize": [{"value": "712.9 kB"}], "format": "application/pdf", "future_date_message": "", "is_thumbnail": false, "licensetype": "license_free", "mimetype": "application/pdf", "size": 712900.0, "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"], "permalink_uri": "http://hdl.handle.net/10191/7515", "pubdate": {"attribute_name": "公開日", "attribute_value": "2009-04-08"}, "publish_date": "2009-04-08", "publish_status": "0", "recid": "4192", "relation": {}, "relation_version_is_last": true, "title": ["Y_2O_3Nb_2O_5系の固相反応"], "weko_shared_id": null}