書誌事項
- タイトル別名
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- Elucidation of Formation Process of NiFe2O4 Ferrite Nano-crystalline Powder Synthesized by Sol-gel Auto-combustion Method
- ゾルゲル ジコ ネンショウホウ ニ ヨリ サクセイ シタ ナノニッケル フェライト リュウシ ノ テイオン セイセイ プロセス ノ カイメイ オヨビ ジキ トクセイ
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抄録
Nano-crystalline NiFe2O4 (NF) powder was prepared by a sol-gel auto-combustion method. Its crystal structure, morphology, particle size and magnetic properties were investigated and the formation process of nano-crystalline NF was elucidated. The as-dried Ni-Fe precursor (Ni/Fe=0.5) was calcined in air at 200-800°C for 4 hours. γ-Fe2O3 powder was formed at about 210°C by the self-combustion of the gel, and was maintained at 200-400°C. Single-phase NF sample was obtained by being calcined at 600-800°C. The NF particles were of nano-crystalline with crystallite diameters of 68.2-94.3 nm which were determined by the use of Scherrer equation for XRD peak broadening and the observation of TEM images. The sample calcined at 200°C had a magnetization value of 44 emu/g, which was lower than that of bulk γ-Fe2O3 (70 emu/g) because of a lot of vacancies at octahedral sites. Magnetization was increased gradually with increasing calcination temperature, and reached to the maximum value of 46 emu/g for the samples calcined at 700 and 800°C, which was in agreement with the magnetization of the bulk NF sample. Coercivity was decreased with increasing calcination temperature.
収録刊行物
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- 粉体および粉末冶金
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粉体および粉末冶金 58 (6), 334-339, 2011
一般社団法人 粉体粉末冶金協会
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詳細情報 詳細情報について
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- CRID
- 1390282681288726016
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- NII論文ID
- 10029437718
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- NII書誌ID
- AN00222724
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- COI
- 1:CAS:528:DC%2BC3MXos1elurs%3D
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- ISSN
- 18809014
- 05328799
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- NDL書誌ID
- 11158434
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可