{"created":"2021-03-01T06:07:21.744638+00:00","id":3599,"links":{},"metadata":{"_buckets":{"deposit":"2e7dbbb1-3086-4463-88c5-8f2f7590c02b"},"_deposit":{"id":"3599","owners":[],"pid":{"revision_id":0,"type":"depid","value":"3599"},"status":"published"},"_oai":{"id":"oai:niigata-u.repo.nii.ac.jp:00003599","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":"Dependence of Optical Properties on Annealing Process of Transparent Nano-Structured γ-Al2O3 Ceramics"}]},"item_5_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2002-12","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"12","bibliographicPageEnd":"1066","bibliographicPageStart":"1062","bibliographicVolumeNumber":"110","bibliographic_titles":[{"bibliographic_title":"日本セラミックス協会学術論文誌"},{"bibliographic_title":"日本セラミックス協会学術論文誌","bibliographic_titleLang":"en"}]}]},"item_5_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Nano-structured γ-Al2O3 ceramics have been pelletized under a pressure of 2.5 GPa on uniaxial compaction of nano-size particles. Although the obtained γ-Al2O3 ceramics show low density, they have a good transparency. For estimating the influence of particle size on the transparency of nano-structured γ-Al2O3 ceramics, nano-sized particles with four different sizes have been used. Nano-structured γ-Al2O3 ceramics made of particles whose size is < 10 nm show a transmittance above 40%. Transmittance decreases with increasing particle diameter. In the case of particle size >20 nm the transmittance is less than 20%. This phenomenon is explained by Rayleigh scattering, which is applicable to a particle diameter much smaller than the wavelength of the incident light. The change in transmittance of nano-structured alumina ceramics on heat treatment is not observed below 1123 K. However the transmittance remarkably decreases at above 1223 K because of rapid grain growths with phase transition, although this temperature is 250 K lower than the γ->α-phase transition temperature (1473 K) of bulk alumina. When the sample produced from 11.2 nm particles was heat-treated at 1173 K, the transmittance was maintained for 2 h and then decreased with increasing the annealing time. At this time, the transmittance slowly decreased with gram growth without phase transition between 2 h and 6 h, and then it steeply decreased with grain growth after 6 h with phase transition.","subitem_description_type":"Abstract"}]},"item_5_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"43931","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Noda, Hiroyuki"}]},{"nameIdentifiers":[{"nameIdentifier":"43932","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kim, Hee Joon"}]}]},"item_5_publisher_7":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本セラミックス協会"}]},"item_5_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"Copyright(C)2002 日本セラミックス協会"}]},"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":"AN10040326","subitem_source_identifier_type":"NCID"}]},"item_5_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"09145400","subitem_source_identifier_type":"ISSN"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"野田, 弘之"}],"nameIdentifiers":[{"nameIdentifier":"43929","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"金, 煕濬"}],"nameIdentifiers":[{"nameIdentifier":"43930","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":"110_12_1062-1066.pdf","filesize":[{"value":"544.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"110_12_1062-1066.pdf","url":"https://niigata-u.repo.nii.ac.jp/record/3599/files/110_12_1062-1066.pdf"},"version_id":"9d1dadb6-891a-40c5-b6fd-950884302b9c"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Nanostructure","subitem_subject_scheme":"Other"},{"subitem_subject":"Rayleigh scattering","subitem_subject_scheme":"Other"},{"subitem_subject":"Alumina","subitem_subject_scheme":"Other"},{"subitem_subject":"CVD","subitem_subject_scheme":"Other"},{"subitem_subject":"Nano-particle","subitem_subject_scheme":"Other"},{"subitem_subject":"Translucent ceramics","subitem_subject_scheme":"Other"},{"subitem_subject":"Sintering","subitem_subject_scheme":"Other"},{"subitem_subject":"Grain growth","subitem_subject_scheme":"Other"}]},"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":"透光性ナノ構造γ-Al2O3の熱処理による光学特性変化","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"透光性ナノ構造γ-Al2O3の熱処理による光学特性変化"},{"subitem_title":"透光性ナノ構造γ-Al2O3の熱処理による光学特性変化","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["454","425"],"pubdate":{"attribute_name":"公開日","attribute_value":"2014-11-18"},"publish_date":"2014-11-18","publish_status":"0","recid":"3599","relation_version_is_last":true,"title":["透光性ナノ構造γ-Al2O3の熱処理による光学特性変化"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-15T03:36:41.718911+00:00"}