Bright upconversion emission and enhanced piezoelectric properties in Er-modified bismuth layer-structured SrCaBi4Ti5O18 ceramics

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• 作者：Lei Yu ; Jigong Hao ; Ruiqing Chu ; Zhijun Xu…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：27
• 期：5
• 页码：5259-5263
• 全文大小：768 KB
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• 作者单位：Lei Yu (1)
  Jigong Hao (1)
  Ruiqing Chu (1)
  Zhijun Xu (1)
  Juan Du (1)
  Wei Li (1)
  Zhongran Yao (1)
  
  1. College of Materials Science and Engineering, Liaocheng University, Liaocheng, 252059, People’s Republic of China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X

文摘

Bismuth layer-structured ferroelectric ceramics of SrCaBi_4−x Er _x Ti₅O₁₈ (SCBT-xEr, x = 0.00, 0.02, 0.04 and 0.06) were prepared by a conventional solid-state reaction method, and their ferroelectric, dielectric, piezoelectric and photoluminescence properties were investigated. The results indicated that all ceramics have a bismuth oxide layered with a dense structure. After Er3+ doping, samples show a bright up-conversion photoluminescence while simultaneously obtaining an enhanced ferroelectric and piezoelectric properties. A bright green (548 nm) and a weak red (681 nm) emission bands were obtained under excitation (980 nm) at room temperature, which correspond to the transitions from 4S_3/2 to 4I_15/2 and 4F_9/2 to 4I_15/2, respectively. Ferroelectric and piezoelectric measurements show that the Er3+-doped ceramics showed an increase in remnant polarization and piezoelectric constant. At x = 0.04, the piezoelectric constant d ₃₃ reaches up to 13pC/N, together with a large remnant polarization (2P _r = 16 μC/cm2) and high Curie temperature (T _c = 573 °C). As a multifunctional material, Er3+-doped SCBT ferroelectric oxide showed great potential in optical electro integration and coupling device applications.