高熵Bi_(0.7)Ba_(0.3)(Mn_(0.2)Fe_(0.2)Ti_(0.3)X_(0.2)Y_(0.1))O_(3)钙钛矿氧化物的微观结构、介电和铁电性能

Microstructure, Dielectric and Ferroelectric Properties of High Entropy Bi_(0.7)Ba_(0.3)(Mn_(0.2)Fe_(0.2)Ti_(0.3)X_(0.2)Y_(0.1))O_(3) Perovskite Oxides

采用微波烧结法制备了Bi_(0.7)Ba_(0.3)(Mn_(0.2)Fe_(0.2)Ti_(0.3)X_(0.2)Y_(0.1))O_(3)(X=Ni,Co;Y=Zr,Nb)高熵陶瓷材料,系统研究了这4种高熵陶瓷的物相组成、介电性能以及铁电性能。X射线衍射结果表明Bi_(0.7)Ba_(0.3)(Mn_(0.2)Fe_(0.2)Ti_(0.3)X_(0.2)Y_(0.1))O_(3)高熵材料为钙钛矿结构,并且所有阳离子均在结构中进行了无序占位。而介电性能的探讨发现该高熵陶瓷材料有着与弛豫铁电体类似的弛豫特征。最后所有的样品都表明有其铁电性,它充分的展示了高熵材料在该方向的发展潜力。

Bi_(0.7)Ba_(0.3)(Mn_(0.2)Fe_(0.2)Ti_(0.3)X_(0.2)Y_(0.1))O_(3)(X=Ni,Co;Y=Zr,Nb) was prepared by microwave sintering.The phase composition,dielectric properties and ferroelectric properties of high entropy ceramic materials were studied systematically.X-ray diffraction results show that Bi_(0.7)Ba_(0.3)(Mn_(0.2)Fe_(0.2)Ti_(0.3)X_(0.2)Y_(0.1))O_(3)materials with high entropy has a perovskite structure,and all cations are disordered occupying in the structure.The dielectric properties of the high entropy ceramic material are found to have relaxation characteristics similar to those of relaxation ferroelectrics.Finally,all the samples showed ferroelectric properties,which fully demonstrated the development potential of high entropy materials in this direction.