Synthesis, characterization and magnetic properties on nanocrystalline BaFe12O19 ferrite
Synthesis, characterization and magnetic properties on nanocrystalline BaFe12O19 ferrite
复制标题
纳米晶BaFe12O19铁氧体的合成、表征及磁性能
DOI：
10.1016/j.cap.2009.03.002
复制
发表时间：
2009-11-01
影响因子：
2.4
通讯作者：
Yang, Hua
中科院分区：
文献类型：
--
作者：
Li, Yaowen;Wang, Qin;Yang, Hua
采用溶胶-凝胶法制备了单相BaM （BaFe12O19）铁氧体。对样品的制备条件，如酸/硝比、pH值和退火温度进行了详细的研究。制备BaFe12O19的最佳条件为Fe/Ba比为12，柠檬酸含量R = 3，溶液起始pH为9，退火温度为950℃。用TG-DSC研究了干燥凝胶的热分解行为，用XRD技术分别测定了粉末的结构和性能。利用振动样品磁强计（VSM）着重研究了钡铁氧体在晶粒尺寸和退火温度变化下的磁性能。磁测结果表明，在1000℃下退火的钡铁氧体样品的最大矫顽力场为5691.91 Oe，最大残余磁化强度为35.60 emu/g，在1000℃下合成的样品的最大饱和磁化强度为60.75 emu/g。爱思唯尔B.V.版权所有
Single phase BaM (BaFe12O19) ferrites are prepared by using sol-gel method. The preparing conditions of samples are investigated in detail, such as acid/nitrate ratio, the value of pH and annealing temperature. The best conditions on preparing BaFe12O19, Which can be obtained on a Fe/Ba ratio of 12, the citric acid contents R = 3, the starting pH Of Solution is 9, and annealing temperature 950 degrees C. The thermal decomposition behavior of the dried gel was examined by TG-DSC, the structure and properties of powders were measured respectively by XRD techniques. The magnetic properties of barium ferrites are emphatically researched about the changing crystallite size and annealing temperature by the vibrating sample magnetometer (VSM). Magnetic measurement shows that the barium ferrite samples annealed at 1000 degrees C has the maximal coercive field of 5691.91 Oe corresponding to the maximal remnant magnetization of 35.60 emu/g and the sample synthesized at 1000 degrees C has the maximal saturation magnetization of 60.75 emu/g. Crown Copyright (c) 2009 Published by Elsevier B.V. All rights reserved.