書誌事項
- タイトル別名
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- Studies on Thermal Decomposition Process of Lanthanum Hydroxide
- スイサンカ ランタン ノ ネツ ブンカイ カテイ ニカンスルケンキュウ サンカ
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説明
As a part of the study on sintering reactions, the thermal decomposition process of La(OH)3 was investigated by using T.G.A., D.T.A. and X-ray diffraction method. From the results thus obtained, the detailed mechanism of the decomposition was inferred.<br>(1) The thermo-gravimetric curves of specimens were obtained in air, N2, and CO2 gas. The thermal decomposition curves showed two stages for La(OH)3. The chemical reactions of these stages were determined as follow.<br>2La(OH)3→2LaO(OH)+2H2O (the initial stage)<br>2LaO(OH)→La2O3+H2O (the second stage)<br>(2) These reactions were found to be first order in various atmospheres. The rate constants for these two decomposition stages in air of La(OH) were represented by<br>k=1016exp(-23000/RT) (the initial stage)<br>k=1025exp(-42000/RT) (the second stage)<br>(3) It was recognized that La(OH)3 became La2O3 at about 600°C in air. The lattice constants of La2O3 obtained were a=3.945Å, c=6.151Å.
収録刊行物
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- 材料
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材料 25 (279), 1165-1168, 1976
公益社団法人 日本材料学会
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詳細情報 詳細情報について
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- CRID
- 1390001205418864512
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- NII論文ID
- 110002299950
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- NII書誌ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL書誌ID
- 1739991
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- データソース種別
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- JaLC
- NDL
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