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  1. 060 工学部
  2. 10 学術雑誌論文
  3. 10 査読済論文
  1. 0 資料タイプ別
  2. 01 学術雑誌論文

Y_2O_3Nb_2O_5系の固相反応

http://hdl.handle.net/10191/7515
http://hdl.handle.net/10191/7515
60fc6eb7-02f9-400b-ba92-9ceb27032fe9
名前 / ファイル ライセンス アクション
110002309793.pdf 110002309793.pdf (712.9 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2009-04-08
タイトル
タイトル Y_2O_3Nb_2O_5系の固相反応
タイトル
言語 en
タイトル Y_2O_3Nb_2O_5系の固相反応
言語
言語 jpn
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
その他のタイトル
その他のタイトル Solid State Reaction between Y_2O_3 and Nb_2O_5
著者 堀田, 憲康

× 堀田, 憲康

WEKO 48003

堀田, 憲康

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松下, 泰彦

× 松下, 泰彦

WEKO 48004

松下, 泰彦

Search repository
松尾, 重友

× 松尾, 重友

WEKO 48005

松尾, 重友

Search repository
著者別名
識別子 48006
識別子Scheme WEKO
姓名 Hotta, Noriyasu
著者別名
識別子 48007
識別子Scheme WEKO
姓名 Matsushita, Yasuhiko
著者別名
識別子 48008
識別子Scheme WEKO
姓名 Matsuo, Shigetomo
抄録
内容記述タイプ Abstract
内容記述 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.
抄録
内容記述タイプ Abstract
内容記述 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.
書誌情報 窯業協會誌
en : 窯業協會誌

巻 86, 号 1, p. 1-5, 発行日 1978-01
出版者
出版者 窯業協会
ISSN
収録物識別子タイプ ISSN
収録物識別子 00090255
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AN00245650
権利
権利情報 日本セラミックス協会
権利
権利情報 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
著者版フラグ
値 publisher
異版である
関連タイプ isVersionOf
識別子タイプ URI
関連識別子 http://ci.nii.ac.jp/naid/110002309793
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