微波低温烧结快速制备Na_(1+x)Zr_(2-x)Fe_(x)(PO_(4))_(3)陶瓷固态电解质  

Rapid preparation of Na_(1+x)Zr_(2-x)Fe_(x)(PO_(4))_(3) ceramic electrolyte by microwave low-temperature sintering

作　　者：张雪 王军霞[1] 詹磊 魏玉锋 李楠 王研 王进[1] ZHANG Xue;WANG Junxia;ZHAN Lei;WEI Yufeng;LI Nan;WANG Yan;WANG Jin(School of Materials Science and Engineering, Southwest University of Science and Technology,Mianyang 621010, China)

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《功能材料》2021年第7期7215-7220,共6页Journal of Functional Materials

基　　金：国家自然科学基金青年基金资助项目(11705153)。

摘　　要：根据NaZr2(PO4)3(简称NZP)的晶体结构特征和电荷补偿机理,通过掺入Fe3+对NZP固态电解质进行改性,采用微波烧结工艺在950℃保温1.5 h制备了Na_(1+x)Zr_(2-x)Fe_(x)(PO_(4))_(3)(x=0,0.1,0.2,0.3,0.4)陶瓷电解质,系统研究了Fe^(3+)掺入量对电解质的物相组成、微观形貌、相对密度以及离子电导率的影响规律。研究结果发现,利用微波烧结工艺,经950℃处理1.5 h后,成功制备出单相、致密的Na_(1+x)Zr_(2-x)Fe_(x)(PO_(4))_(3)陶瓷电解质,与传统固相烧结相比,极大降低了烧结温度、缩短了制备周期。且随着Fe3+掺入量的增加,样品的相对密度增大,最大为93.8%。阻抗测试结果表明,Fe3+的掺入可提高样品的离子电导率,当Fe^(3+)掺量为0.3~0.4,室温离子电导率约为6.5×10^(-6) S/cm,高温(573 K)下离子电导率达到1.56×10^(-3) S/cm。According to the crystal structure characteristics and charge compensation mechanism of NZP-type materials,Fe3+-modified NZP ceramic solid electrolytes,Na_(1+x)Zr_(2-x)Fe_(x)(PO_(4))_(3)(x=0,0.1,0.2,0.3,0.4),were designed and prepared by microwave sintering process at 950℃for 1.5 h.The influences of Fe^(3+)on the phase composition,microscopic morphology,relative density,and ionic conductivity of the ceramic electrolyte were systematically studied.The results showed that the single-phase and compact Na_(1+x)Zr_(2-x)Fe_(x)(PO_(4))_(3) electrolytes were successfully prepared by microwave sintering at 950℃for holding 1.5 h,which greatly reduced the sintering temperature and shorten the preparation period.With the increase of Fe^(3+)doping amount,the relative density of the sample increased,whose maximum is 93.8%.Moreover,the impedance test results revealed that the addition of Fe3+could improve the ion conductivity of the samples.When the Fe3+doping content was 0.3~0.4,the room-temperature ion conductivity reached 6.5×10^(-6) S/cm,and the ion conductivity at high temperature(573 K)was up to 1.56×10^(-3) S/cm.

关 键 词：微波烧结 固态电解质 磷酸锆钠(NZP) 离子电导率 

分 类 号：TQ174[化学工程—陶瓷工业]