High transmittance in lead-free lanthanum modified potassium-sodium niobate ceramics
High transmittance in lead-free lanthanum modified potassium-sodium niobate ceramics
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无铅镧改性铌酸钾钠陶瓷的高透光率
DOI：
10.1016/j.jallcom.2017.04.236
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发表时间：
2017-09
影响因子：
6.2
通讯作者：
Zupei Yang
中科院分区：
文献类型：
--
作者：
Dong Yang;Zhenyu Yang;Xiaoshuai Zhang;Lingling Wei;Xiaolian Chao;Zupei Yang
与锆钛酸镧铅(PLZT)相比，Nb酸钾钠具有良好的光电响应频率和全息存储性能。然而，其低透过率限制了其在光电控制器中的应用。为了解决这个问题，引入了镧作为掺杂剂，并用实验和理论两种方法对所得到的陶瓷的性能进行了评估。采用传统的低压烧结工艺制备了(1-x)(K0.5Na0.5)NbO_3-xLa_2O_3(KNN-xL；x=0.005，0.010，0.015，0.020)透光陶瓷。在所考察的陶瓷中，KNN-0.015L的带隙最宽，为3.108 eV，透过率最高，为74%，均高于热压烧结法制备的PLZT(带隙=3.10 eV，透过率=0.70%)。用密度泛函理论(DFT)对相变规律进行了评估，验证了实验结果。此外，还对电子结构和晶粒度调制引起的透明度变化的相关机理进行了深入的探讨。
Compared to lead lanthanum zirconate titanate (PLZT), potassium-sodium niobate shows good advances because of its excellent photoelectric response frequency and holographic storage. However, its low transmittance limits its application in photoelectrical controllers. To address this issue, lanthanum was introduced as a dopant, and the properties of the resulting ceramics were evaluated using both experimental and theoretical approaches. The (1-x)(K0.5Na0.5)NbO3-xLa2O3(KNN-xL; x = 0.005, 0.010, 0.015, 0.020) transmittance ceramics were prepared by traditional low-pressure sintering process. Among the ceramics examined, KNN-0.015L achieved the widest band gap (Eg) of 3.108 eV and the highest transparency of 74%; both values are higher than those of PLZT (band gap = 3.10 eV, transparency = 70%) prepared by hot-press sintering. The transition rule was evaluated by density functional theory (DFT) to validate the experimental results obtained. Additionally, the related mechanism of transparency variation induced by electronic structure and grain size modulation was discussed thoroughly.
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影响因子：
6.2
作者：
Wenbin Liu;Jiangxu Li;B. Jiang;Di Zhang;Yu-bai Pan
通讯作者：
Wenbin Liu;Jiangxu Li;B. Jiang;Di Zhang;Yu-bai Pan
影响因子：
4.5
作者：
Qiang Li;Ju Wang;Zhiyong Liu;G. Dong;H. Fan
通讯作者：
Qiang Li;Ju Wang;Zhiyong Liu;G. Dong;H. Fan
影响因子：
29.4
作者：
Xu, Kai;Li, Jun;Zhu, Jianguo
通讯作者：
Zhu, Jianguo
影响因子：
2.1
作者：
Xian Zhang;Wenchuan Wang;Qingfeng Zeng;Hui Li
通讯作者：
Xian Zhang;Wenchuan Wang;Qingfeng Zeng;Hui Li
影响因子：
2.6
作者：
Y. P. Peng;Yang Wang;Luyuan Zhang;Chun-ting Wang;P. L. Zhang;W. Zhong
通讯作者：
Y. P. Peng;Yang Wang;Luyuan Zhang;Chun-ting Wang;P. L. Zhang;W. Zhong