自蔓延高温合成软磁铁氧体粉的硏究进展/孟祥东 提高铁氧体的电阻率是铁氧体高频化的主要途径,使用频率 U]. Progress Energy Combustion Sci, 2001, 27: 523 越高,要求p越高。要提高电阻率,可以通过改变配方来实9caoG,OrR, Lichen r,etal. SHS in Italy: An overview 现,相应降低配方中的Fe2O3及ZnO用量,或者加入其它掺 U. Int J Self- Propagating Highr Temperature Synthesis 杂剂(如CoO等),力求不出现过量的Fe2。 2008,17:76 高磁导率软磁铁氧体的主要特性是磁导率特别高,可以10 John J Moore, Feng HJ. Combustion synthesis of advanced 大大地缩小磁芯体积,并且希望提高工作频率。高磁导率磁 materials Part 1. Reaction parameters J]. Progress Mater 芯的表面质量必须很好,必须涂覆一层均匀、致密、绝缘的有 机涂层这是国内产品的一个技术难点。磁导率是材料的非1 Cheng Hsiung Peng, Chyr Ching Hwang,etal. A self- 本征特性,与材料的饱和磁化强度和微观结构有关,因此要 opagating hightemperature synthesis method for Nrfer- 获得高磁导率值的铁氧体,必须满足以下条件:磁晶各向异 rite powder synthesis[J]. Mater Sci Eng B, 2004, 107: 295 性能小,磁致收缩系数小材质均匀,没有杂质、气孔和异相,12 Avakyan P B, Nersisyan E, Nersesyan M D. Self-propa 没有残余应力 gating hightemperature synthesis of manganese-zinc ferrite 铁氧体总的磁损耗是由磁滞损耗、涡流损耗和剩余损耗 U]. Self- Propagating Highr Temperature Synthesis, 1995, 4 成。低频下,铁氧体材料损耗以磁滞损耗为主;高频下,剩 余损耗和涡流损耗占主导地位。提高材料的电阻率可以降13姜久兴Mmm铁氧体的燃烧合成研究[D]哈尔滨:哈尔 低涡流损耗,提高材料的起始磁导率和降低材料的矫顽力可 滨工业大学,2005 以降低磁滞损耗,降低材料相对密度可以降低剩余损耗 14 Agrafiotis CC, Zaspalis V T. Self-propagating highrtempe 综上所述,我国必须在提高生产技术水平、新产品开发 rature sy nthesis of MnZrferrites for inductor applications 和新的生产工艺的研究上下功夫,除了进一步提高生产效 U].J Magn Magn Mater 2004, 283: 364 率、减小能耗、降低生产成本和减少环境污染外,还可以通过 15 Busurin S M. Morozov Yu G. Kuznet sov M V. Effect of an electrostatic field on self-propagating hightemperature syr 对软磁铁氧体磁粉及掺杂烧结磁体的原理和工艺进行全面 thesis of manganese ferrite]. Combustion Explosion Shock 深入的研究,制备高频化、高磁导率和低损耗的铁氧体。 Waves,2005,41(4):421 参考文献 16 Yang Ke, Guo Zhimeng, Farid Akhtar et al. Effect of inner xidant on self-propagating hightemperature synthesis of 1翁兴园中国软磁铁氧体产业发展面临的风险和挑战[]新 MnZrferrite powder[J]. Rare Metals 2006, 25: 553 材料产业,2007,(7):45 17 Yan Wenxun, Li Qiang et al. Characterization and low-tem" 2 Avakyan P B. Efficient continuo us SHS technology for pro- perature sintering of Nio.5 Zno s Fe2 O4 nanopowders prepared duction of ferrite materials[J]. Int J Self-Propagating Highr by refluxing methodJ]. Powder Techn 2009, 192: 23 Temperature Synthesis, 2000, 9(1): 75 18李垚.自蔓延高温合成NrZn铁氧体的研究[D]哈尔滨:哈 3 Merzhanov A G. Solid flames: Discoveries, concepts, and 尔滨工业大学,2000 rizons of cognition[J]. Combust Sci Techn, 1994, 98: 307 19岳丽华.自蔓延高温合成 NiCu铁氧体及低温烧结性能研 4 Arvind varma Alexander s Ro gac hey. Alexander S mukas 究[D]哈尔滨:哈尔滨工业大学,2004 yan, et al. Complex behavior of self-propagating reaction 20 Lancastera T. Blundella S J, Prattb F L u+-SR studies of waves in heterogeneous media [J]. Proc National Acad Sci the weak ferromagnets CoCO3 and NiCO J]. Physica B 1998,95:11053 2003,326:522 5 Curfs C. Gano I G. Vaughan G B M. et al. Intermetallic- 21 Shaheen W M. Thermal behaviour of pure and binary basic ceramic composites synthesis by SHS time- resolved studies using synchrotron radiation X- rays]. Int J Self-Propagating nickel carbonate and ammonium molybdate systems [J]. Ma- ter Lett,2002,52:272 High Temperature Synthesis 2000, 9: 33 6 Rashkovsky S A. Numerical simulation of hetero geneous 22 Maxim V Kuznetsov, et al. Self propagating highrtempera- structure, thermal properties and combustion of solid mix ture synthesis of chromium substituted magnesium zinc fer- tures[ C]//29th Meeting on Combustion. Moscow 2006 rites Mgo.5 Znos Fe2. Cr, O4(0 <x <1. 5)[J].JMater 7 Anatoly A Borissov, De L Luca, Aleksandr Grigor, et al Chem,1998,8:2701 elf-propagating hightemperature synthesis of materials 23 Manjurul Haque M, Huq M, Hakim M A Dens [M. US: Taylor Francis 2002: 13 magnetic and dielectric behaviour of Cur substituted Mg- Z 8 Oliveria AA M, Kaviary M. None equilibrium in the trans- ferrites[J]. Mater Chem Phys 2008, 112: 580 port of heat and reactants in combustion in progress media (责任编辑王炎) 2 01994-2010 China Academic Journal Electronic Publishing House. all rights reserved. hup: /hone cnki. net© 1994-2010 China Academic Journal Electronic Publishing House. All rights reserved. http://www.cnki.net 提高铁氧体的电阻率是铁氧体高频化的主要途径 ,使用频率 越高 ,要求ρ越高。要提高电阻率 ,可以通过改变配方来实 现 ,相应降低配方中的 Fe2 O3 及 ZnO 用量 ,或者加入其它掺 杂剂(如 CoO 等) ,力求不出现过量的 Fe 2 + 。 高磁导率软磁铁氧体的主要特性是磁导率特别高 ,可以 大大地缩小磁芯体积 ,并且希望提高工作频率。高磁导率磁 芯的表面质量必须很好 ,必须涂覆一层均匀、致密、绝缘的有 机涂层 ,这是国内产品的一个技术难点。磁导率是材料的非 本征特性 ,与材料的饱和磁化强度和微观结构有关 ,因此要 获得高磁导率值的铁氧体 ,必须满足以下条件 :磁晶各向异 性能小 ,磁致收缩系数小 ,材质均匀 ,没有杂质、气孔和异相 , 没有残余应力。 铁氧体总的磁损耗是由磁滞损耗、涡流损耗和剩余损耗 组成。低频下 ,铁氧体材料损耗以磁滞损耗为主 ;高频下 ,剩 余损耗和涡流损耗占主导地位。提高材料的电阻率可以降 低涡流损耗 ,提高材料的起始磁导率和降低材料的矫顽力可 以降低磁滞损耗 ,降低材料相对密度可以降低剩余损耗。 综上所述 ,我国必须在提高生产技术水平、新产品开发 和新的生产工艺的研究上下功夫 ,除了进一步提高生产效 率、减小能耗、降低生产成本和减少环境污染外 ,还可以通过 对软磁铁氧体磁粉及掺杂烧结磁体的原理和工艺进行全面 深入的研究 ,制备高频化、高磁导率和低损耗的铁氧体。 参考文献 1 翁兴园. 中国软磁铁氧体产业发展面临的风险和挑战[J ]. 新 材料产业 ,2007 ,(7) :45 2 Avakyan P B. Efficient continuous SHS2technology for pro2 duction of ferrite materials[J ]. Int J Self2Propagating High2 Temperature Synthesis ,2000 , 9 (1) :75 3 Merzhanov A G. Solid flames: Discoveries , concepts , and horizons of cognition[J ]. Combust Sci Techn ,1994 ,98 :307 4 Arvind Varma ,Alexander S Rogachev ,Alexander S Mukas2 yan ,et al. Complex behavior of self2propagating reaction waves in heterogeneous media [J ]. Proc National Acad Sci , 1998 ,95 :11053 5 Curfs C , Gano I G, Vaughan G B M , et al. Intermetallic2 ceramic composites synthesis by SHS time2resolved studies using synchrotron radiation X2rays[J ]. Int J Self2Propagating High2Temperature Synthesis ,2000 ,9 :331 6 Rashkovsky S A. Numerical simulation of heterogeneous structure , thermal properties and combustion of solid mix2 tures[C]/ / 29th Meeting on Combustion. Moscow ,2006 7 Anatoly A Borissov , De L Luca , Aleksandr Grigor , et al. Self2propagating high2temperature synthesis of materials [ M]. US : Taylor & Francis ,2002 :132 8 Oliveria A A M , Kaviary M. None equilibrium in the trans2 port of heat and reactants in combustion in progress media [J ]. Progress Energy Combustion Sci ,2001 ,27 :523 9 Cao G, OrrùR , Licheri R , et al. SHS in Italy : An overview [J ]. Int J Self2Propagating High2Temperature Synthesis , 2008 ,17 :76 10 John J Moore , Feng H J. Combustion synthesis of advanced materials Part I. Reaction parameters[J ]. Progress Mater Sci ,1995 ,39 :243 11 Cheng2Hsiung Peng , Chyi2Ching Hwang , et al. A self2 propagating high2temperature synthesis method for Ni2fer2 rite powder synthesis[J ]. Mater Sci Eng B ,2004 ,107 :295 12 Avakyan P B , Nersisyan E L , Nersesyan M D. Self2propa2 gating high2temperature synthesis of manganese2zinc ferrite [J ]. Self2Propagating High2Temperature Synthesis ,1995 , 4 (1) :79 13 姜久兴. Mn2Zn 铁氧体的燃烧合成研究[D ]. 哈尔滨 :哈尔 滨工业大学 ,2005 14 Agrafiotis C C , Zaspalis V T. Self2propagating high2tempe2 rature sy nthesis of MnZn2ferrites for inductor applications [J ].J Magn Magn Mater ,2004 ,283 :364 15 Busurin S M , Morozov Yu G, Kuznetsov M V. Effect of an electrostatic field on self2propagating high2temperature syn2 thesis of manganese ferrite[J ]. Combustion Explosion Shock Waves ,2005 ,41 (4) :421 16 Yang Ke , Guo Zhimeng , Farid Akhtar ,et al. Effect of inner oxidant on self2propagating high2temperature synthesis of MnZn2ferrite powder[J ]. Rare Metals ,2006 ,25 :553 17 Yan Wenxun , Li Qiang ,et al. Characterization and low2tem2 perature sintering of Ni0. 5 Zn0. 5 Fe2O4 nano2powders prepared by refluxing method[J ]. Powder Techn ,2009 ,192 :23 18 李垚. 自蔓延高温合成 Ni2Zn 铁氧体的研究[D]. 哈尔滨 :哈 尔滨工业大学 ,2000 19 岳丽华. 自蔓延高温合成 NiCuZn 铁氧体及低温烧结性能研 究[D]. 哈尔滨 :哈尔滨工业大学 , 2004 20 Lancastera T , Blundella S J , Prattb F L.μ+ 2SR studies of the weak ferromagnets CoCO3 and NiCO3 [J ]. Physica B , 2003 ,326 :522 21 Shaheen W M. Thermal behaviour of pure and binary basic nickel carbonate and ammonium molybdate systems[J ]. Ma2 ter Lett ,2002 ,52 :272 22 Maxim V Kuznetsov ,et al. Self propagating high2tempera2 ture synthesis of chromium substituted magnesium zinc fer2 rites Mg0. 5 Zn0. 5 Fe2 - x Cr xO4 ( 0 ≤x ≤1. 5) [J ]. J Mater Chem ,1998 ,8 :2701 23 Manjurul Haque M , Huq M , Hakim M A. Densification , magnetic and dielectric behaviour of Cu2substituted Mg2Zn ferrites[J ]. Mater Chem Phys ,2008 ,112 :580 (责任编辑 王 炎) 自蔓延高温合成软磁铁氧体粉的研究进展/ 孟祥东 ·49 ·