第４１卷第４期陕西科技大学学报Vol．４１No．４２０２３年８月JournalofShaanxiUniversityofScience&TechnologyAug．２０２３∗文章编号:２０９６Ｇ３９８X(２０２３)０４Ｇ０１０４Ｇ０８Sr１ＧxErxTiO３陶瓷的巨介电性能研究蒲永平,张贤,张金波,宁亚婷,上阳超(陕西科技大学材料科学与工程学院陕西省无机材料绿色制备与功能化重点实验室,陕西西安７１００２１)摘要:选用“两性”稀土Er３＋离子掺杂SrTiO３陶瓷,采用传统固相法制备出了在空气下烧结的具有巨介电低损耗的Sr１ＧxErxTiO３陶瓷．结果表明,当x＝０．０１２,该陶瓷显示出巨介电行为,在１kHz下具有１７７９０的介电常数,在１MHz下具有１４３６３的介电常数,在１kHz下具有０．０２的介电损耗．在巨介电、低介电损耗的材料中,存在着“电子钉扎”现象,电子的局域极化使介电常数增大;而在此过程中,由于限制了电子的长程移动,从而降低了介质损耗．关键词:SrTiO３;巨介电常数;低介电损耗;两性掺杂中图分类号:TB３２文献标志码:AStudyoncolossalpermittivitypropertiesofSr１ＧxErxTiO３ceramicsPUYongＧping,ZHANGXian,ZHANGJinＧbo,NINGYaＧting,SHANGYangＧchao(SchoolofMaterialScienceandEngineering,ShaanxiKeyLaboratoryofGreenPreparationandFunctionalizaＧtionforInorganicMaterials,ShaanxiUniversityofScience&Technology,Xi′an７１００２１,China)Abstract:TheSr１ＧxErxTiO３ceramicsweresinteredinairwithlowdielectriclossandcolossalpermittivity,whichwerepreparedbythetraditionalsolidphasemethodbyusingamphotericrareearthEr３＋ionsdopedSrTiO３ceramics．Theresultsshowthatwhenx＝０．０１２,thecolosＧsalpermittivityis１７７９０at１kHz,andthepermittivityis１４３６３at１MHz,dielectriclossis０．０２at１kHz．Incolossalpermittivitymaterialswithlowdielectricloss,thereiselectronpinＧningeffect,andthelocalpolarizationofelectronsincreasesthepermittivity．Ontheotherhand,thelongＧrangemotionofelectronsisinhibited,resultinginlowdielectricloss．Keywords:SrTiO３;colossalpermittivity;lowdielectricloss;amphotericdoping０引言巨介电陶瓷是近年来研究的热点,因为这些材料都在储能和微型电容器方面有广阔的应用前景．尽管近年来有很多好的材料[１,２],但是巨介电常数材料仍有一些局限性,例如CaCu３Ti４O１２(CCTO)的介电损耗很大,这限制了它的...
