甘氨盐燃烧法制备BaFe12O19纳米粉末及其磁性能  

Synthesis of BaFe_(12)O_(19) nano-powders by the glycinate combustion method and magnetic measurements

作　　者：解育娟[1] 张学斌[1] 凤仪[1] 陈淑娴[1] 李庶[1] 黄新林[2] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]安徽安凯福田曙光车桥有限公司,安徽合肥230051

出　　处：《合肥工业大学学报（自然科学版）》2009年第1期32-35,65,共5页Journal of Hefei University of Technology：Natural Science

基　　金：高等学校博士学科点专项科研资助项目(20070359034)

摘　　要：以硝酸铁[Fe（NO3）39H2O]、乙酸钡[Ba（CH3COO）2]和甘氨酸[C2H5NO2]为原料，采用甘氨酸溶胶凝胶自蔓延燃烧法成功制备成BaFe12O19纳米粉末；用XRD、SEM和VSM等测试方法研究了不同条件下产物的微观形貌、晶体结构及磁学性能。研究表明，煅烧温度和甘氨酸与金属盐的摩尔比会影响单相六角BaFe12O19的形成；甘氨酸与金属盐摩尔比为3：1的前驱体在800℃下，煅烧2h后可得到六角片状、粒度40～50nm的单相BaFe12O19粉末；当温度升高到900℃时，钡铁氧体颗粒长大到100nm以上，矫顽力下降。By using iron nitrate [Fe （NO3）39H2O], barium acetate [Ba （CH3COO）2 ] and glycinc, [C2 H5NO2],BaFe12019 nanoparticles were successfully synthesized by the self-propagating high-tern perature synthesis（SHS） technique based on the sol-gel method. The morphology, crystalline structure and magnetic property of the barium ferrite particles were determined by means of XRD, SEM, and VSM. It is shown that the calcination temperature and the molar ratio of glycine to the total metal salt influenced significantly the formation of barium hexaferrite. The single phase barium hexaferrite powders can be obtained after the precursors were calcined at temperature 800 ℃ for 2 h. The average grain size of the barium ferrite is 40-50 nm when the molar ratio of glycine tO metal salt is 3 .： 1. The resultant magnetic parameters of barium ferrite are Hc= 39.68 × 10^4 A/m,Ms =45.45 emu/g. When the calcination temperature is 900 ℃, the grain size is above 100 nm, and the coercive force decreases.

关 键 词：甘氨酸 自蔓燃烧法 钡铁氧体 纳米颗粒 

分 类 号：TB34[一般工业技术—材料科学与工程]