Magnetic and Gas Sensing Property of Nanosized NiFe2O4 Powders Synthesized by Pulsed Wire Discharge
Magnetic and Gas Sensing Property of Nanosized NiFe2O4 Powders Synthesized by Pulsed Wire Discharge
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DOI：
10.1007/s11051-005-5427-z
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发表时间：
2006-03
影响因子：
2.5
通讯作者：
P. Lee;K. Ishizaka;H. Suematsu;W. Jiang;K. Yatsui
中科院分区：
文献类型：
--
作者：
P. Lee;K. Ishizaka;H. Suematsu;W. Jiang;K. Yatsui
采用脉冲线放电法合成了镍铁氧体（NiFe2O4）粉末。 X射线衍射（XRD）和透射电子显微镜（TEM）分析表明，粉末中仅观察到镍铁氧体尖晶石，没有观察到其他相。所得颗粒的平均尺寸很大程度上取决于氧气压力：氧气压力越高，粉末尺寸越大，由 Brunauer-Emmet-Teller (BET) 测定。合成粉末的室温饱和磁化强度为 42–46 emu/g，具体取决于粉末尺寸。这些粉末在约 280–360°C 时还表现出高氯敏感性，并且与氯浓度具有良好的线性敏感性。
Nickel ferrite (NiFe2O4) powders were synthesized by pulsed wire discharge method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses show that only nickel ferrite spinel and no other phase was observed in the powders. Mean size of the obtained particles strongly depended on the oxygen pressure: the higher oxygen pressure corresponds to larger powder size, as determined by Brunauer–Emmet–Teller (BET). The room temperature saturation magnetization of the synthesized powders was 42–46 emu/g depending on the powder size. These powders also showed high chlorine sensitivity at about 280–360°C, and a good linear sensitivity with chlorine concentration.