沉淀剂对Mn-Zn铁氧体纳米粒子磁性能的影响

发布时间：2018-01-17 20:10

本文关键词：沉淀剂对Mn-Zn铁氧体纳米粒子磁性能的影响　出处：《人工晶体学报》2014年01期 　论文类型：期刊论文

【摘要】：本研究以氨水和碳酸氢铵混合物为沉淀剂,试图在近中性环境下合成Mn-Zn铁氧体纳米粒子以进一步提高所制备材料的磁性能。结果表明:当沉淀剂由NaOH变为氨水+碳酸氢铵混合物时,Mn-Zn铁氧体纳米粒子的沉降时间明显缩短(15 min,约为NaOH沉淀剂的1/3)。所得材料的饱和磁化强度高达81.99 emu/g,比NaOH的提高近90%。同时,材料的矫顽力(Hc)也明显降低至52.7 Oe,说明氨水+碳酸氢铵混合物是一种制备高性能Mn-Zn铁氧体纳米磁性材料的有效沉淀剂。
[Abstract]:In this study, the mixture of ammonia and ammonium bicarbonate was used as precipitant. Mn-Zn ferrite nanoparticles were synthesized in near neutral environment to further improve the magnetic properties of the prepared materials. The results show that when the precipitant is changed from NaOH to ammonium bicarbonate mixture of ammonia water. The deposition time of Mn-Zn ferrite nanoparticles was shortened by 15 minutes, which was about 1 / 3 of that of NaOH precipitator. The saturation magnetization of the obtained material was as high as 81.99 emu/g. At the same time, the coercivity of the material also decreased to 52.7 Oe. The results show that ammonium bicarbonate mixture is an effective precipitator for preparing high performance Mn-Zn ferrite nanomagnetic materials.
【作者单位】：河北工业大学材料科学与工程学院;河北工业大学化工学院;
【基金】：河北省自然科学基金(E2011202192,12215122D) 天津市应用基础及前沿技术研究计划(12JCYBJC11600)
【分类号】：TM277
【正文快照】： 1引言锰锌铁氧体由于具有高的初始磁导率、饱和磁化强度、电阻率以及低的功率损耗而成为很重要的软磁材料,其在变压器、磁放大器、磁记录以及功率转换器等方面有着广泛的应用[1-4]。研究发现:纳米锰锌铁氧体具有良好的磁热性能和较低的居里温度,是一种理想的自发控温型肿瘤材

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