由NiZn-Fe(Ⅱ)-Fe(Ⅲ)层状双金属氢氧化物前体制备NiZnFe2O4尖晶石磁性材料
Magnetic Properties of NiZnFe2O4 Spinels Prepared from Layered NiZn-Fe(II)-Fe(III) Hydrotalcite Precursors
摘 要
提出了一种由层状前体合成单一晶相镍锌尖晶石的方法,对NiZn-Fe(Ⅱ)-Fe(Ⅲ)SO4水滑石的制备进行了研究,合成了Ni2+、Zn2+、Fe2+、Fe3+摩尔比分别为1∶2∶5∶2,3∶3∶10∶4,2∶1∶5∶2,5∶1∶10∶4的系列水滑石层状前体；探讨了合成条件对晶体结构的影响,研究了层状前体焙烧产物的磁学特性.结果表明:四种摩尔比的配方均可制备出晶型较好的水滑石层状前体,焙烧产物为晶相单一的尖晶石铁氧体,其中当摩尔比为3∶3∶10∶4时,产物尖晶石铁氧体的磁学特性较高,比饱和磁化强度高达78.89 A·m2·kg-1.
层状前体
尖晶石铁氧体
磁学特性
NiZn-Fe(II)-Fe(III)SO4 hydrotalcite
layere precursor
spinel ferrite
magnetic property
Abstract
The single phase spinel NiZnFe2O4 ferrite was prepared by calcining layered NiZn-iron(II)-iron(III) hydrotalcite precursors.The hydrotalcite with different Ni2+∶Zn2+∶Fe2+∶Fe3+ molar ratios of 1∶2∶5∶2,3∶3∶10∶4,2∶1∶5∶2,5∶1∶10∶4 were prepared.The effect of reaction condition on the crystal structure was also investigated.The layered double hydroxide(LDH) and resulting hydrotalcite calcined products were characterized by XRD,IR,TG-DTA and VSM.The results showed when the molar ratio of Ni2+∶Zn2+∶Fe2+∶Fe3+ in the mixture was 3∶3∶10∶4,the material obtained by calcining the resulting hydrotalcite was a single phase spinel and the sample exhibited excellent magnetic properties with intensity of saturation 78.89 A·m2·kg-1.
中图分类号 O44 O469
所属栏目 新材料 新工艺
基金项目 国家自然科学基金资助项目(20076003)
收稿日期 2007/9/17
修改稿日期 2008/1/11
网络出版日期
作者单位点击查看
备注祁欣(1952-),男,北京人,教授,博士.
引用该论文: QI Xin,CHEN Xiu-xia,ZHOU Xiao-duo,WU Dong-tao,LI Feng. Magnetic Properties of NiZnFe2O4 Spinels Prepared from Layered NiZn-Fe(II)-Fe(III) Hydrotalcite Precursors[J]. Materials for mechancial engineering, 2008, 32(9): 34～38
祁欣,陈秀霞,周小多,武懂涛,李峰. 由NiZn-Fe(Ⅱ)-Fe(Ⅲ)层状双金属氢氧化物前体制备NiZnFe2O4尖晶石磁性材料[J]. 机械工程材料, 2008, 32(9): 34～38
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【2】Atwood J L,Lehn J M,Vaccari A,et al.In Comprehensive Supramolecular Chemistry[M].Oxford:Pergamon Press,1996.
【3】Rives V.Layered Double Hydroxides[M].New York:Present and Future,Nova Science Publishers,2001.
【4】田民波.磁性材料[M].北京:清华大学出版社,2001.
【5】Brindley G W,Kikkawa S.A crystal-chemical study of Mg,Al and Ni,Al hydroxy-perchlorates and hydroxy-carbonates[M].Am:Mineral,1979,64:836-843.
【6】Millange F,Walton R I,OHare D.Time-resolved in situ X-ray diffraction study of the liquid-phase reconstruction of Mg-Al-carbonate hydrotalcite-like compounds[J].J Mater Chem,2000(10):1713-1720.
【7】Holgado M J,Rives V,Sanroman M S.Hexacyanoferrate-interlayered Hydrotalcite[J].Solid State Ionics,1996,92:273-283.
【8】Finocchio E,Busca G,Ramis G.On the mechanism of the selective oxy-dehydrogenation of n-butenes to 1,3-butadiene on magnesium ferrite:an FT-IR study[J].Studies in Surface Science and Catalysis,1997,110:989-998.
【9】Titulaer M K,Jansen J B H,Geus J W.The quantity of reduced nickel in synthetic takovite:effects of preparation conditions and calcination temperature[J].Clays Clay Miner,1994,42:249-258.
【10】黄伟,何华辉,冯则坤,等.高磁导率、高支流叠加MnZn软磁铁氧体材料的研究[J].磁性材料及器件,2005,36(6):28-29.
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