CAJ | 학술논문

采用传统的固相法制备了(1?x)(K0.5Na0.5NbO3-LiSbO3-BiFeO3)-xCuFe2O4(x=0.1,0.2,0.3,0.4)磁电复合陶瓷,并借助X射线衍射仪、扫描电镜和磁电耦合系数测试仪等对复合陶瓷的微结构和性能进行了分析.结果表明,复合陶瓷的K0.5Na0.5NbO3-LiSbO3-BiFeO3和CuFe2O4物相之间发生了一定的离子相互扩散作用,且两相的颗粒大小匹配性较好.随着CuFe2O4含量增加,复合陶瓷的压电系数从130 pC/N减小到30 pC/N,饱和磁致伸缩系数从4.5×10?6增加到12.4×10?6左右,磁电耦合系数表现出先增加后减小,在x=0.3时获得最大的磁电耦合系数9.4 mV·cm?1·Oe?1.
채용전통적고상법제비료(1?x)(K0.5Na0.5NbO3-LiSbO3-BiFeO3)-xCuFe2O4(x=0.1,0.2,0.3,0.4)자전복합도자,병차조X사선연사의、소묘전경화자전우합계수측시의등대복합도자적미결구화성능진행료분석.결과표명,복합도자적K0.5Na0.5NbO3-LiSbO3-BiFeO3화CuFe2O4물상지간발생료일정적리자상호확산작용,차량상적과립대소필배성교호.수착CuFe2O4함량증가,복합도자적압전계수종130 pC/N감소도30 pC/N,포화자치신축계수종4.5×10?6증가도12.4×10?6좌우,자전우합계수표현출선증가후감소,재x=0.3시획득최대적자전우합계수9.4 mV·cm?1·Oe?1.
The (1?x)(K0.5Na0.5NbO3-LiSbO3-BiFeO3)-xCuFe2O4 (x=0.1, 0.2, 0.3 and 0.4) magnetoelectric composite ceramics are pre-pared by the conventional solid-state reaction method. The microstructures and properties of the composite ceramics are characterized by X-ray diffractometer, scanning electron microscope and magnetoelectric coupling coefficient meter. The weak ionic interdiffusions between the phases K0.5Na0.5NbO3-LiSbO3-BiFeO3 and CuFe2O4 are observed and their particle sizes are well matched between each other. With the increase of CuFe2O4 content, the piezoelectric coefficient (d33) of the composite ceramics decreases from 130 pC/N to 30 pC/N and the magnetostriction coefficient (?λ) increases from 4.5×10?6 to 12.4×10?6. The magnetoelectric coupling coefficient (αE) of the composite ceramics first increases and then decreases with the CuFe2O4 content increasing. When the composition x=0.3, a maximum value ofαE=9.4 mV·cm?1·Oe?1 is achieved.