Influence of surfactants on co-precipitation synthesis of strontium ferrite
Influence of surfactants on co-precipitation synthesis of strontium ferrite
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表面活性剂对共沉淀合成锶铁氧体的影响
DOI：
10.1016/j.jallcom.2011.08.058
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发表时间：
2011-10-13
影响因子：
6.2
通讯作者：
Li, H. Z.
中科院分区：
文献类型：
--
作者：
Lu, H. F.;Hong, R. Y.;Li, H. Z.
采用共沉淀法制备了SrFe_（12）O_（19）粉体。以氯化铁和硝酸锶为原料，用3 mol/L氢氧化钠水溶液为沉淀剂，采用共沉淀法制备了铁氧体前驱体。采用十二烷基硫酸钠（SDS）、聚乙二醇6000（PEG-6000）、十六烷基三甲基溴化铵（CTAB）三种表面活性剂，研究了表面活性剂对锶铁氧体颗粒性能的影响。首先将铁氧体前体在400 ° C的煅烧炉中预煅烧，然后使用行星式研磨机与KCl和NaCl混合以降低煅烧温度。随后将混合物在各种温度下煅烧。采用X射线粉末衍射、透射电子显微镜和振动样品磁强计对样品的结构和磁性能进行了表征。本文首先验证了Fe ~（3+）/Sr ~（2+）摩尔比的影响，然后讨论了退火温度。结果表明，锶铁氧体相在煅烧后在650 ℃开始形成并在800 ℃完成，并且使用CTAB制备的颗粒在粒度和结晶度方面表现出最佳性能。(C)2011 Elsevier B. V.保留所有权利。
Strontium ferrite (SrFe12O19) particles were prepared by co-precipitation method. The ferrite precursors were produced from aqueous mixtures of ferric chloride and strontium nitrate by co-precipitation, using 3 mol/L sodium hydroxide aqueous solutions as precipitant. Three surfactants sodium dodecyl sulfate (SDS), polyethylene glycol 6000 (PEG-6000), cetyltrimethylammonium bromide (CTAB), were applied and the influence of surfactants on the properties of the strontium ferrite particles was studied. The ferrite precursors were first precalcined in a muffle furnace at 400 degrees C and then mixed with KCl and NaCl using a planetary milling machine in order to lower the calcination temperature. Subsequently the mixtures were calcined at various temperatures. Structure and magnetic properties of the particles were characterized by X-ray powder diffraction, transmission electron microscopy and vibrating sample magnetometer. In this paper, effects of Fe3+/Sr2+ mole ratio were first verified and annealing temperatures were then discussed. The results show the strontium ferrite phase begins to form at 650 degrees C and complete at 800 degrees C after calcination, and the particles prepared using CTAB exhibit the best properties with respect to particle size and dispersibility. (C) 2011 Elsevier B.V. All rights reserved.