Effect of particle growth on heat generation ability in AC magnetic field for nano-sized magnetic Y₃Fe₅O₁₂ powder prepared by bead milling
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- NISHIMORI Tadahiko
- Graduate School of Science and Engineering, Ehime University
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- AKIYAMA Yusuke
- Graduate School of Science and Engineering, Ehime University
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- NAOHARA Takashi
- Graduate School of Science and Engineering, Ehime University
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- MAEHARA Tsunehiro
- Graduate School of Science and Engineering, Ehime University
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- HIRAZAWA Hideyuki
- Department of Environmental Materials Engineering, Niihama National College of Technology
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- AONO Hiromichi
- Graduate School of Science and Engineering, Ehime University
書誌事項
- タイトル別名
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- Effect of particle growth on heat generation ability in AC magnetic field for nano-sized magnetic Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> powder prepared by bead milling
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抄録
A superparamagnetic magnetic Y3Fe5O12 ferrite of 20.5 nm in particle size was prepared by bead milling using 0.05 mmφ beads for 10 h. The heat generation ability in an AC magnetic field (370 kHz, 1.77 kA·m−1) was 0.34 W·g−1 for the bead-milled sample and was improved by calcination at low temperature. The main reason for this heat generation property of the milled samples was ascribed to a Néel relaxation of the superparamagnetic material. The maximum ability of 0.46 W·g−1 in an AC magnetic field (370 kHz, 1.77 kA·m−1) was obtained for the sample (36.8 nm in particle size) calcined at 700°C. The heat generation ability was decreased with particle growth when the calcination temperature was higher than 700°C. For the sample calcined at 600°C, the heat generation ability (W·g−1) was proportional to the square of the magnetic field (H/kA·m−1). In the case of the calcination at 700°C, the heat generation ability (W·g−1) depended on the cube of the magnetic field. The heat generation mechanism would change from superparamagnetic to ferrimagnetic due to the pariticle growth at 700°C.
収録刊行物
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 121 (1409), 13-16, 2013
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680262344064
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- NII論文ID
- 130004950778
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- NII書誌ID
- AA12229489
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- COI
- 1:CAS:528:DC%2BC3sXht1Shsr0%3D
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- ISSN
- 13486535
- 18820743
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- NDL書誌ID
- 024173351
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可