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Techniques used were electron microscopy, EPMA., X-ray diffraction and dilatometry. A layer of Y_2O_3\u30fbNb_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\u2103-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\u30fbNb_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": "\u8457\u8005\u5225\u540d", "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": "\u51fa\u7248\u8005", "attribute_value_mlt": [{"subitem_publisher": "\u7aaf\u696d\u5354\u4f1a"}]}, "item_5_relation_31": {"attribute_name": "\u7570\u7248\u3067\u3042\u308b", "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": "\u6a29\u5229", "attribute_value_mlt": [{"subitem_rights": "\u65e5\u672c\u30bb\u30e9\u30df\u30c3\u30af\u30b9\u5354\u4f1a"}, {"subitem_rights": "\u672c\u6587\u30c7\u30fc\u30bf\u306f\u5b66\u5354\u4f1a\u306e\u8a31\u8afe\u306b\u57fa\u3065\u304dCiNii\u304b\u3089\u8907\u88fd\u3057\u305f\u3082\u306e\u3067\u3042\u308b"}]}, "item_5_select_19": {"attribute_name": "\u8457\u8005\u7248\u30d5\u30e9\u30b0", "attribute_value_mlt": [{"subitem_select_item": "publisher"}]}, "item_5_source_id_11": {"attribute_name": "\u66f8\u8a8c\u30ec\u30b3\u30fc\u30c9ID", "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": "\u8457\u8005", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "\u5800\u7530, \u61b2\u5eb7"}], "nameIdentifiers": [{"nameIdentifier": "48003", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "\u677e\u4e0b, \u6cf0\u5f66"}], "nameIdentifiers": [{"nameIdentifier": "48004", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "\u677e\u5c3e, \u91cd\u53cb"}], "nameIdentifiers": [{"nameIdentifier": "48005", "nameIdentifierScheme": "WEKO"}]}]}, "item_files": {"attribute_name": "\u30d5\u30a1\u30a4\u30eb\u60c5\u5831", "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": "\u8a00\u8a9e", "attribute_value_mlt": [{"subitem_language": "jpn"}]}, "item_resource_type": {"attribute_name": "\u8cc7\u6e90\u30bf\u30a4\u30d7", "attribute_value_mlt": [{"resourcetype": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "Y_2O_3Nb_2O_5\u7cfb\u306e\u56fa\u76f8\u53cd\u5fdc", "item_titles": {"attribute_name": "\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_title": "Y_2O_3Nb_2O_5\u7cfb\u306e\u56fa\u76f8\u53cd\u5fdc"}, {"subitem_title": "Y_2O_3Nb_2O_5\u7cfb\u306e\u56fa\u76f8\u53cd\u5fdc", "subitem_title_language": "en"}]}, "item_type_id": "5", "owner": "1", "path": ["453/454", "423/424/425"], "permalink_uri": "http://hdl.handle.net/10191/7515", "pubdate": {"attribute_name": "\u516c\u958b\u65e5", "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\u7cfb\u306e\u56fa\u76f8\u53cd\u5fdc"], "weko_shared_id": null}