硅酸盐学报

Er,Zr共掺杂对(K0.16Na0.84)0.5Bi4.5Ti4O15压电陶瓷电学和上转换发光性能的影响

作者：江亚林江向平陈超涂娜江兴安陈云婧

单位：景德镇陶瓷大学材料科学与工程学院江西省先进陶瓷重点实验室江西景德镇 333001

关键词：正交畸变上转换发光介电性能压电陶瓷

分类号：TQ174

出版年,卷(期):页码：2016,44(9):1270-1275

DOI：10.14062/j.issn.0454-5648.2016.09.03

摘要：

采用固相法制备Er、Zr共掺铋层状结构陶瓷(K0.16Na0.84Bi)0.47Er0.02Bi4Ti4–xZrxO15(KNBET–Zr–x，0≤x≤0.12，x为摩尔分数)，研究了不同Zr含量对样品的结构、电学与上转换发光性能的影响。结果表明：所有样品均为单一的正交相铋层状结构，无其他杂相出现。随着Zr掺入量的增加，晶格常数a、b、c不断增大，正交畸变（b/a）的值逐渐减小；适量Zr掺杂使样品的介电损耗降低，剩余极化强度2Pr和压电常数d33得到提高；当x=0.04时，样品具有最佳的综合电学性能：介电损耗tanδ=0.61%、压电性能d33=24 p/CN、剩余极化强度2Pr=3.02 μC/cm2。在980 nm近红外光源激发下，所有样品均呈现出较强的绿光发射，对应于2H11/2→4I15/2和4S3/2→4I15/2的跃迁。随着Zr离子掺入量增加，正交畸变(b/a)减少，荧光强度逐渐下降。

Er and Zr–codoped bismuth layered structured ceramics (BLSFs), (K0.16Na0.84Bi)0.47Er0.02Bi4Ti4–xZrxO15 (KNBET–Zr–x,0≤x≤0.12) were synthesized by a solid state reaction method. The structural, electrical and up-conversion (UC) photoluminescence properties were investigated. The results show that all the samples possess a single orthorhombic BLSFs structure without any secondary phase. The lattice parameters a, b and c increase with increasing Zr4+ substitution and the values of orthorhombic distortion (b/a) calculated decrease gradually. The doping of an appropriate content of Zr4+ ions can decrease the tanδ and increase the 2Pr as well as d33. The sample with x=0.04 has the optimal comprehensive performance, i.e., dielectric loss tanδ (0.61%), piezoelectric properties d33 (24 p/CN) and remanent polarization 2Pr (3.02 μC/cm2). In addition, under the 980 nm near infrared excitation, all the samples emit a bright UC greenlight corresponding to the transitions 2H11/2→4I15/2 and 4S3/2→4I15/2 level, respectively. The weaker UC emission after Zr introduction can be attributed to the decreased orthorhombic distortions (b/a).

基金项目：

国家自然科学基金(51562014，51262009)；江西自然科学基金(20133ACB20002，20142BAB216009)；江西省高等学校“先进陶瓷材料”科技创新团队；江西省教育厅科技项目(GJJ150911，GJJ150931，GJJ150933)；江西省创新训练项目(212050?008)资助。

作者简介：

江亚林(1992—)，男，硕士研究生。

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