Journal of Inorganic Materials >
Effects of Mn3O4 on Magnetic Property, Microstructure and Resistivity of LiZn Ferrites
(State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China)
Received date: 2009-04-14
Revised date: 2009-06-17
Online published: 2010-01-24
Irondeficient LiZn ferrites with compositions of Li0.35Zn0.30Fe2.29MnxO4-δ+0.005mol%Bi2O3 and Li0.35Zn0.30Fe2.29O4-δ+0.005mol%Bi2O3+x/3mol%Mn3O4(x=0.02-0.08) were prepared by a conventional ceramic process at 920℃ and 950℃. Mn3O4 was added to the raw materials and calcined powders, respectively. Sintered at 920℃, adding optimum Mn3O4to the raw materials enhances saturation magnetization Ms and remanence Br and decreases coercivity Hc, while adding Mn3O4 to the calcined powders has little effect on Ms and Br. Both kinds of samples have high Hc resulting from incomplete solid-state reaction at 920℃, whereas Hc is much lower in the sample with Mn3O4 adding to the raw materials. Sintered at 950℃, Hc of both kinds of samples decreases remarkably, whereas Hc is higher in the sample with Mn3O4 adding to the raw materials. Resistivities ρ in both kinds of samples are enhanced by optimum Mn3O4 adding and reaches the maximum when x is 0.06. Furthermore, the resistivity is higher in the sample with Mn3O4 adding to the raw materials.
Key words： LiZn ferrites; Mn3O4; magnetic property; microstructure; resistivity
JIANG Xiao-Na , LAN Zhong-Wen , YU Zhong , Zhuang Ya-Ming , LIU Pei-Yuan . Effects of Mn3O4 on Magnetic Property, Microstructure and Resistivity of LiZn Ferrites[J]. Journal of Inorganic Materials, 2010 , 25(1) : 77 -82 . DOI: 10.3724/SP.J.1077.2010.00077
［1］PardaviHorvath M. J. Magn. Magn. Mater., 2000, 215-216(6): 171-183.
［2］Baba P D, Argentina G M, Courtney W E, et al. IEEE Trans. Magn., 1972, MAG-8(1): 83-94.
［3］Liu C Y, Lan Z W, Jiang X N, et al. J. Magn. Magn. Mater., 2008, 320(7): 1335-1339.
［4］余 忠, 陈代中, 兰中文, 等 (YU Zhong, et al). 无机材料学报 (Journal of Inorganic Materials), 2007, 22(6):1173-1177.
［5］Teo M L S, Kong L B, Li Z W, et al. J. Alloy. Compd., 2008, 459(1/2): 557-566.
［6］Han Z Q, Liao Y, Feng T. Densification, Solid Reaction and Properties of Low Temperature Sintered LiZn Ferrites Prepared by Ceramics Method. ICF10. Chengdu, 2008: 336-338.
［7］Jiang X N, Lan Z W, Yu Z, et al. Effects of Sintering Temperature and Bi2O3 on Li Volatilization in LiZn Ferrites. ICF10. Chengdu, 2008: 364-367.
［8］都有为. 铁氧体. 南京：江苏科学技术出版社, 1996：49-53.
［9］王会宗. 磁性材料及其应用. 北京：国防工业出版社, 1989：288-289.
［10］White G O, Patton C E. J. Magn. Magn. Mater., 1978, 9(4): 299-317.
［11］陈代中. 低温制备低矫顽力LiZn铁氧体材料研究. 成都: 电子科技大学硕士论文, 2006.
［12］宛德福, 马兴隆. 磁性物理学. 北京：电子工业出版社, 1999: 374-378.
［13］黄永杰, 李世堃, 兰中文．磁性材料．成都：电子科技大学出版社, 2002: 1-5.
/
| 〈 |
|
〉 |
