Fe掺杂对BiTaO_4陶瓷样品介电和铁电特性的影响  

Effect of Fe doping on dielectric and ferroelectric properties in BiTaO_4 ceramics

作　　者：王守宇[1] 孟蔚丹 王旭[1] 李梦[1] 

机构地区：[1]天津师范大学物理与材料科学学院,天津300387

出　　处：《天津师范大学学报（自然科学版）》2015年第1期30-33,共4页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(11004148;11104202);天津市自然科学基金资助项目(11JCZDJC21800;11JCYBJC02700)

摘　　要：为探究Fe掺杂对BiTaO4陶瓷样品介电特性和铁电特性的影响,采用传统固相烧结法制备了Bi Ta1-xFexO4-x(x=0,0.01,0.03)陶瓷样品,利用X线衍射仪和扫描电子显微镜对样品的晶体结构和表面形貌进行分析,利用精密阻抗分析仪和铁电分析仪对样品的介电性能和铁电性能进行检测.结果表明:Fe掺杂没有明显改变样品的晶体结构;随着Fe掺杂量的增加,样品的介电常数表现出较好的稳定性,介电损耗略有减小,且基本保持在tanδ=0.05以下,其漏电流先增大后减小,且掺杂样品均可得到比较完整的电滞回线.In order to investigate the effects of Fe substitution on dielectric and ferroelectric properties of BiTaO4 ceramics, BiTal-x FexO4-s （x = 0,0.01,0.03 ） ceramics were prepared by solid state reaction. Crystalline structure and morphology of the samples were investigated by X-ray diffraction （XRD） and scanning electron microscope （SEM）. Dielectric properties and ferroelectrie properties were measured by precision impedance analyzer and ferroeleetrie analyzer. The results showed that the Fe substitution did not result in phase transformation. With the increase of Fe concentration, the samples exhibit slight de- crease in dielectric loss, and remain below tan 8 = 0.05. The leakage current density of the sample were firstly increased and then decreased along with the Fe concentration.

关 键 词：铁掺杂 BiTaO4陶瓷 晶体结构 介电性能 铁电性能 

分 类 号：O469[理学—凝聚态物理]