Magnetic Properties of Fe16N2 Fine Particles.
Magnetic Properties of Fe16N2 Fine Particles.
复制标题
Fe16N2 细颗粒的磁性。
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
Y. Kato
中科院分区：
文献类型：
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作者：
T. Hattori;N. Kamiya;Y. Kato
研究了合成Fe16N2TiN颗粒的加热条件及其磁性能。商业超细γ-Fe_2O_3颗粒首先在200℃~700℃的氢气中还原8小时，然后在140℃的氨氮混合气体中氮化24小时。粉末经500℃还原、140℃氮化后，经X-射线衍射仪和穆斯堡尔谱分析，确定为接近Fe16N_2的单相。室温饱和磁化强度约为200emu/g，具有最大比表面积的Fe16N2粉末具有最大的矫顽力(2250Oe)。
Heat conditions for synthesis of Fe16N2 tine particles and the resulting magnetic properties were investigated. Commercial ultra fine γ - Fe2O3 particles were first reduced under hydrogen gas at temperatures between 200°C and 700°C for 8 hours and nitrided under an ammonia-argon mixed gas at 140°C for 24 hours. The powder reduced at 500°C and nitrided at 140°C was identified as nearly Fe16N2 single phase by X-ray diffraction and Mossbauer analysis. Saturation magnetization at room temperature was about 200 emu/g. Maximum coercive force (2250 Oe) was achieved in the Fe16N2 powder with the largest specific surface area.