摘要
采用快速液相烧结法制备Bi_(1-x)Pr_(x)Fe_(1-x)Ti_(x)O_(3)(x=0.00、0.03、0.06、0.12)系列多铁陶瓷样品,研究Pr-Ti共掺杂对BiFe O_(3)结构、缺陷、电学和磁学特性的影响。XRD分析结果表明:所有样品均为菱方钙钛矿结构,Pr-Ti共掺杂可有效抑制杂相生成,当掺杂量高于0.06时杂相基本消失,共掺杂引起结构畸变。正电子湮没寿命谱测试结果表明:所有样品中均存在阳离子空位型缺陷,空位尺寸和浓度均随Pr-Ti掺杂量增加而增大。电学和磁学性能测试结果表明:适量Pr-Ti共掺杂可有效提高Bi Fe O_(3)的介电、铁电和磁学性能。综合上述结果,认为BiFeO_(3)多铁性能的改善可能是由于Pr-Ti共掺杂引起晶格畸变、减少氧空位浓度、改变阳离子空位浓度等多种原因引起。
Bi_(1-x)Pr_(x)Fe_(1-x)Ti_(x)O_(3)(x=0.00、0.03、0.06、0.12) ceramics were synthesized using rapid liquid phase sintering.The influences of Pr-Ti co-doping on the structure,defects,electrical and magnetic properties of Bi Fe O_(3) ceramics have been investigated.The XRD results indicate that Pr-Ti co-doping induce a lattice distortion,and the impurity phases decrease and almost vanish when the Pr-Ti doping content above 0.06.Positron annihilation lifetime test results reveal that cation vacancy-type defects exist in all samples,the open volume and concentration of vacancy type defect increase with Pr-Ti doping content increasing.Electrical and magnetic measurements show that the dielectric,ferroelectric and magnetic properties of BiFeO_(3) can be improved by doping with an appropriate amount of Pr-Ti.These results are interpreted by means of the subtle change in the structure,reduction of oxygen vacancies and the level of cation vacancy concentration in the doped samples.
作者
代兴华
王旭昊
代海洋
DAI Xinghua;WANG Xuhao;DAI Haiyang(XJ Wind Power Technology Co.Ltd..Xuchang 461000,China;Department of Physics and Electronic Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2022年第1期23-27,共5页
Ordnance Material Science and Engineering
基金
国家自然科学基金(11775192)
河南省自然科学基金优秀青年项目(212300410092)。
