Er3+掺杂对Bi3Ti1.5W0.5O9-Bi4Ti3O12共生无铅压电陶瓷性能的影响

doi:10.11901/1005.3093.2021-302

材料研究学报 DOI: 10.11901/1005.3093.2021-302

曾仁芬江向平陈超黄枭坤聂鑫叶芬

景德镇陶瓷大学材料科学与工程学院江西省先进陶瓷材料重点实验室

Structral, up-conversion luminescence and electrical performances of Er3+-doped Bi3Ti1.5W0.5O9-Bi4Ti3O12 inter-growth lead-free piezoceramics

引用本文:

曾仁芬江向平陈超黄枭坤聂鑫叶芬. Er3+掺杂对Bi3Ti1.5W0.5O9-Bi4Ti3O12共生无铅压电陶瓷性能的影响[J]. 材料研究学报, 10.11901/1005.3093.2021-302.

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摘要: 利用传统固相法合成制备Bi7-xErxTi4.5W0.5O21(BTW-BIT-xEr, x=0.05, 0.10, 0.15, 0.25, 0.35)共生铋层结构无铅压电陶瓷，对上转换发光性能和电学性能进行了系统研究。BTW-BIT-xEr的XRD和SEM的相结构与形貌分析表明形成了单一铋层状结构晶相。所有组分在980nm光波激发下都能清晰的观察到两个绿光和一个红光发射峰，峰中心分别位于532nm, 548nm和660nm处，且其强度比可以通过改变掺杂Er3+离子浓度进行调节。根据BTW-BIT-0.15Er样品绿光532nm和548nm在温度范围290K-440K下光强比随温度的变化关系拟合表明440K处具有最大灵敏度，为0.0023K-1。通过对BTW-BIT-xEr样品的介电和阻抗分析，表明Er3+离子取代了伪钙钛矿层的Bi3+致使氧空位浓度的减小，进而降低高温介电损耗，提高激活能和压电常数。其中，BTW-BIT-0.15Er 陶瓷的综合电学性能最优，分别为 d33=14Pc/N, Tc=697oC，tanδ=0.53%, Qm=2055。同时具备最优的发光性能和良好的热稳定性，表明该陶瓷在高温传感器有具有一定的运用前景。

Abstract：Bi7-xErxTi4.5W0.5O21(BTW-BIT-xEr3+, x=0.05, 0.10, 0.15, 0.25, 0.35) lead-free piezoelectric?ceramics with inter-growth bismuth-layered structure were fabricated via solid?phase?synthesizing?method and the upconversion fluorescence and electrical properties were systemically investigated. The results of XRD and SEM revealed the formation of a single phase with bismuth-layered structure.Two green and one red emissions were observed for all components under the exciting wavelength of 980nm. The three emissions were centered at 532nm, 548nm and 660nm and the intensity ratio of red and green emissions could be tuned through the change of Er3+ doping content. According to the intensity ratio of 532nm and 548nm for BTW-BIT-0.15Er3+ in the range of 290K-440K, the temperature sensitivity was fitted and showed maximum temperature sensitivity of 0.0023K-1at 440K. The dielectric and impedance of BTW-BIT-xEr3+ ceramics were analyzed. The results indicated that Er3+ ions were in place of Bi3+ ion in perovskite-like blocks and lessened the oxygen vacancies. It accounted for the decrease of high-temperature dielectric?loss, the raising activation energy?and enhanced piezoelectric constant. It showed that BTW-BIT-0.15Er ceramic possessed the optimal properties: d33=14pC/N, Tc=697oC，tanδ=0.53%. In addition, BTW-BIT-0.15Er3+ exhibited the optimal photoluminescence and good thermal stability, indicating the potential application of this ceramic in high temperature sensors.

收稿日期: 2021-05-12

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	曾仁芬
	江向平
	陈超
	黄枭坤
	聂鑫
	叶芬
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