采用固相合成法制备出尖晶石结构CoFe2O4粉末和钙钛矿结构BaTiO3,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CoFe2O4/BaTiO3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CoFe2O4/BaTiO3复相多铁材料的烧结性能,在相同的烧结温度下,CoFe2O4/BaTiO3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.
CoFe2O4 powders 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.
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