Effects of phase structure on up-conversion photoluminescence and dielectric performance in Er3 doped (Bi0.5Na0.5)TiO3-BaTiO3 lead-free ceramics
Effects of phase structure on up-conversion photoluminescence and dielectric performance in Er3 doped (Bi0.5Na0.5)TiO3-BaTiO3 lead-free ceramics
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Er3掺杂(Bi0.5Na0.5)TiO3-BaTiO3无铅陶瓷相结构对上转换光致发光和介电性能的影响
DOI：
10.1016/j.jallcom.2019.06.147
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发表时间：
2019
影响因子：
6.2
通讯作者：
Liu Junming
中科院分区：
文献类型：
--
作者：
Chen Chao;Xia Xiang;Zheng Laiqi;Luo Laihui;Tu Na;Shen Zongyang;Jiang Xiangping;Liu Junming
研究了Er 3+掺杂x（Bi 0. 5 Na 0. 5）TiO 3-（1-x）BaTiO 3（xNBT-BT：Er 3+，0. 00 ≤x≤ 0. 90）无铅陶瓷的相结构对其上转换发光和介电性能的影响。X射线衍射和Rietveld结构细化分析进行表征的相结构。随着NBT浓度的增加，晶体结构由四方相P4 mm转变为P4 bm相。UC发射随四方性的增加而显著增强，但在P4 bm相出现后开始下降。温度相关的UC发射光谱表明，0. 70 NBT-BT：Er 3+的最佳发射样品具有较高的颜色调谐性能（从绿色到红色）。此外，获得了优异的UC绿色发射的热稳定性（在483 K下为初始强度的65.6%）。采用UC绿色发光强度比表征了xNBT-BT：Er 3+陶瓷的温敏特性。
The effects of phase structure on up-conversion (UC) photoluminescence (PL) and dielectric properties of lead-free ceramics of Er3+-dopedx(Bi0·5Na0.5)TiO3-(1-x)BaTiO3(xNBT-BT: Er3+, 0.00 ≤x≤ 0.90) were investigated. X-ray diffraction and Rietveld structural refinement analyses were conducted to characterize the phase structure. On increasing the NBT concentration, the crystal structure changes from tetragonalP4mm toP4bm phase. The UC emission is significantly enhanced with the increment of tetragonality, while it begins to decrease upon the occurrence of theP4bm phase. Temperature-dependent UC emission spectra have shown that the optimal emission sample of 0.70NBT-BT: Er3+exhibits a high color-tuning performance (from green to red). Furthermore, an outstanding thermal stability of UC green emission (65.6% of the initial intensity at 483K) was achieved. The intensity ratio of UC green emission was adopted to reveal the temperature-sensing properties ofxNBT-BT: Er3+ceramics.