添加助烧剂对CoFe_2O_4/BaTiO_3复相多铁材料性能的影响  

Effect of additive on properties of CoFe_2O_4/BaTiO_3 multiphase magnetoelectric material

作　　者：李亚[1] 代建清[1] 张瑞浩[1] 程振宇[1] LI Ya DAI Jianqing ZHANG Ruihao CHENG Zhenyu(Faculty of Material Science and Engineer, Kunming University of Science and Technology, Kunming 650093, Chin)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《复合材料学报》2017年第3期632-637,共6页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51162019);国家自然科学基金(51462019)

摘　　要：采用固相合成法制备出尖晶石结构CoFe_2O_4粉末和钙钛矿结构BaTiO_3,并按照2∶8的摩尔比将粉末混合,随后添加不同的助烧剂。研究多种助烧剂对制备出的CoFe_2O_4/BaTiO_3复相多铁材料成分、微观形貌、介电性能、铁电性和磁性能的影响。结果表明:仅添加助烧剂Bi2O3,难以达到烧结致密的目的;当助烧剂中含有CaCO3-SiO2时,有效提高了CoFe_2O_4/BaTiO_3复相多铁材料的烧结性能,在相同的烧结温度下,CoFe_2O_4/BaTiO_3复相多铁材料致密度得到提升,且介电性能、铁电性、磁性能均有一定程度的优化。CoFe2O4powders of spinel structure and BaTiO3 powders of perovskite structure were prepared using solid phase synthesis.Then the powders were mixed in the molar ratio of 2∶8.The different sintering aids were added.The effect of additive on composition microstructure,dielectric properties,ferroelectric properties and magnetic properties of CoFe2O4/BaTiO3 multiphase magnetoelectric material were studied.The results show that it is difficult to achieve the purpose of sintering densification when only Bi2O3 is added;when sintering aids containing CaCO3-SiO2,the sintering performance of CoFe2O4/BaTiO3 multiphase magnetoelectric material is improved.At the same sintering temperature,the density of CoFe2O4/BaTiO3 multiphase magnetoelectric material is improved,and the dielectric properties,ferroelectric and magnetic properties are optimized for a certain degree.

关 键 词：CoFe2O4/BaTiO3 助烧剂 多铁性 铁电性 磁性能 

分 类 号：TG174.75[金属学及工艺—金属表面处理]