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The composite gels began to transform into alpha-alumina when heated at lower temperatures of around 500 degrees C and the alpha-alumina fraction of the heat-treated products increased with increasing temperature. The alpha-alumina fraction was also dependent on both the type and amount of hydroxy acid additive. Among the composite gels studied, significant low-temperature alpha-alumina formation was observed for the PHA-mandelic acid, PHA-citric acid and PHA-lactic acid series. Low-temperature alpha-alumina formation was further promoted by employing a two-step heat-treatment method. The interaction between the functional groups of PHA and hydroxy acid and the seeding effect appear to play important roles in the course of the gelation and calcination processes for low-temperature alpha-alumina formation. (C) 2010 Elsevier Ltd and Techna Group S.r.l. 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Low-temperature formation of alpha-alumina from various polyhydroxoaluminum-hydroxy acid composite gels
http://hdl.handle.net/10091/16075
dce9d997-8294-4b18-a846-163175f3c3b8
名前 / ファイル | ライセンス | Actions | |
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item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2012-11-20 | |||||
タイトル | ||||||
タイトル | Low-temperature formation of alpha-alumina from various polyhydroxoaluminum-hydroxy acid composite gels | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | Powder | |||||
キーワード | ||||||
主題 | Sol-gel processes | |||||
キーワード | ||||||
主題 | Al(2)O(3) | |||||
キーワード | ||||||
主題 | Low-temperature formation | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Yamaguchi, Tomohiro
× Yamaguchi, Tomohiro× Mukouyama, Naoyuki× Fujita, Takayuki× Taruta, Seiichi× Kitajima, Kunio |
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信州大学研究者総覧へのリンク | ||||||
Yamaguchi, Tomohiro | ||||||
http://soar-rd.shinshu-u.ac.jp/profile/ja.WVnVbpkh.html | ||||||
信州大学研究者総覧へのリンク | ||||||
Taruta, Seiichi | ||||||
http://soar-rd.shinshu-u.ac.jp/profile/ja.OacaZVkh.html | ||||||
出版者 | ||||||
出版者 | ELSEVIER SCI LTD | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | CERAMICS INTERNATIONAL. 37(1):201-206 (2011) | |||||
書誌情報 |
CERAMICS INTERNATIONAL 巻 37, 号 1, p. 201-206, 発行日 2011-01 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Low-temperature alpha-alumina formation was attempted using various polyhydroxoaluminum (PHA)-hydroxy acid composite gels, which were prepared from PHA solutions containing different amounts of hydroxy acids, such as lactic acid, glycolic acid, malic acid, citric acid or mandelic acid. The composite gels began to transform into alpha-alumina when heated at lower temperatures of around 500 degrees C and the alpha-alumina fraction of the heat-treated products increased with increasing temperature. The alpha-alumina fraction was also dependent on both the type and amount of hydroxy acid additive. Among the composite gels studied, significant low-temperature alpha-alumina formation was observed for the PHA-mandelic acid, PHA-citric acid and PHA-lactic acid series. Low-temperature alpha-alumina formation was further promoted by employing a two-step heat-treatment method. The interaction between the functional groups of PHA and hydroxy acid and the seeding effect appear to play important roles in the course of the gelation and calcination processes for low-temperature alpha-alumina formation. | |||||
資源タイプ(コンテンツの種類) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0272-8842 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10622625 | |||||
DOI | ||||||
関連識別子 | ||||||
識別子タイプ | DOI | |||||
関連識別子 | http://dx.doi.org/10.1016/j.ceramint.2010.08.035 | |||||
関連名称 | ||||||
関連名称 | 10.1016/j.ceramint.2010.08.035 | |||||
著者版フラグ | ||||||
値 | author | |||||
WoS | ||||||
Web of Science | ||||||
http://gateway.isiknowledge.com/gateway/Gateway.cgi?&GWVersion=2&SrcAuth=ShinshuUniv&SrcApp=ShinshuUniv&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000285853500029 |