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首页> 外文期刊>Journal of materials science >Fabrication and properties of (K_(0.52)Na_(0.48))NbO_3-KSr_2Nb_5O_(15) lead-free ferroelectric composite ceramics
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Fabrication and properties of (K_(0.52)Na_(0.48))NbO_3-KSr_2Nb_5O_(15) lead-free ferroelectric composite ceramics

机译：（K_（0.52）Na_（0.48））NbO_3-KSr_2Nb_5O_（15）无铅铁电复合陶瓷的制备及性能

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摘要

(1 −  x )(K~(0.52)Na~(0.48))NbO~(3)– x KSr~(2)Nb~(5)O~(15)[(1 −  x )KNN– x KSN] lead-free ferroelectric composite ceramics were successfully prepared using KNN powders and rod-like KSN particles as raw materials. Effects of KSN content on the microstructure, electrical, and optical properties were investigated. The results showed that perovskite KNN phase and tungsten bronze KSN phase coexisted in (1 −  x )KNN– x KSN ceramics, which resulted in double dielectric peaks in the temperature dependence plots. With increasing the content of KSN, the dielectric relaxor characteristic was weakened, the Curie temperature shifted to relatively lower temperature, the dielectric tunability and the optical transmittance were enhanced. 0.8KNN–0.2KSN ceramics showed the optimized electrical and optical properties, with dielectric tunability up to 45.4% at bias of 6 kV/mm, and the optical transmittance reached ~ 84% at the wavelength of near-infrared region.
机译：（1 − x）（K〜（0.52）Na〜（0.48））NbO〜（3）– x KSr〜（2）Nb〜（5）O〜（15）[（1 − x）KNN– x KSN]以KNN粉末和棒状KSN颗粒为原料成功制备了无铅铁电复合陶瓷。研究了KSN含量对微结构，电学和光学性质的影响。结果表明，钙钛矿KNN相和钨青铜KSN相共存于（1 − x）KNN– x KSN陶瓷中，从而在温度依赖性图中产生了双介电峰。随着KSN含量的增加，介电弛豫特性减弱，居里温度转变为相对较低的温度，介电可调性和透光率得到提高。 0.8KNN-0.2KSN陶瓷具有最佳的电学和光学性能，在6kV / mm的偏压下介电可调性高达45.4％，在近红外区域的波长处的透光率达到〜84％。

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