TY - JOUR
T1 - Transparency of K0.5N0.5NbO3–Sr(Mg1/3Nb2/3)O3 lead-free ceramics modulated by relaxor behavior and grain size
AU - Zhang, Xiaoshuai
AU - Yang, Dong
AU - Yang, Zhenyu
AU - Zhao, Xumei
AU - Chai, Qizhen
AU - Chao, Xiaolian
AU - Wei, Lingling
AU - Yang, Zupei
N1 - Funding Information:
This work was supported by National Science Foundation of China (NSFC) (Grant nos. 51572163 , 51577111 , 21401123 , 51172136 and 51107077 ), the Key Project of Natural Science Foundation of Shaanxi Province ( 2015JZ011 ), the Fundamental Research Funds for the Central Universities (Program no. GK201601003 ), Information Materials and Devices Research Center of The Shanghai Institute of Ceramics of the Chinese Academy of Sciences (SICCAS) ( KLIFMD-2015-04 ).
Publisher Copyright:
© 2016 Elsevier Ltd and Techna Group S.r.l.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - High transparency was obtained in (1−x)(K0.5Na0.5)NbO3–xSr(Mg1/3Nb2/3)O3 (x=0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08) lead-free ceramics by pressure-less sintering procedure. The effects of Sr(Mg1/3Nb2/3)O3 content on the microstructure, phase transition, optical properties and electrical properties were studied in detail. The X-ray diffraction results showed that the crystal structure of ceramics gradually transformed from orthorhombic phase into pseudo-cubic phase with doping of Sr(Mg1/3Nb2/3)O3. The fine grain microstructure with clear grain boundary was observed in all compositions, while the grain size exhibited significant composition dependence. It was found that a more uniform distribution with smaller grain size was favorable to high optical transmittance, owing to the decreased scattering by grains and grain boundaries. In addition, a strong diffuse phase transformation in KNN-based ceramics induced by Sr(Mg1/3Nb2/3)O3 doping, causing the ceramics become more relaxor-like and transparent. The transmittance and electric properties results indicated that the 0.95(K0.5Na0.5)NbO3–0.05 Sr(Mg1/3Nb2/3)O3 ceramics exhibited higher transmittance (60% in the near-IR region) accompanied with better electrical properties (εm=2104, Pr=5.0 μC/cm2, d33=92 pC/N).
AB - High transparency was obtained in (1−x)(K0.5Na0.5)NbO3–xSr(Mg1/3Nb2/3)O3 (x=0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08) lead-free ceramics by pressure-less sintering procedure. The effects of Sr(Mg1/3Nb2/3)O3 content on the microstructure, phase transition, optical properties and electrical properties were studied in detail. The X-ray diffraction results showed that the crystal structure of ceramics gradually transformed from orthorhombic phase into pseudo-cubic phase with doping of Sr(Mg1/3Nb2/3)O3. The fine grain microstructure with clear grain boundary was observed in all compositions, while the grain size exhibited significant composition dependence. It was found that a more uniform distribution with smaller grain size was favorable to high optical transmittance, owing to the decreased scattering by grains and grain boundaries. In addition, a strong diffuse phase transformation in KNN-based ceramics induced by Sr(Mg1/3Nb2/3)O3 doping, causing the ceramics become more relaxor-like and transparent. The transmittance and electric properties results indicated that the 0.95(K0.5Na0.5)NbO3–0.05 Sr(Mg1/3Nb2/3)O3 ceramics exhibited higher transmittance (60% in the near-IR region) accompanied with better electrical properties (εm=2104, Pr=5.0 μC/cm2, d33=92 pC/N).
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U2 - 10.1016/j.ceramint.2016.07.069
DO - 10.1016/j.ceramint.2016.07.069
M3 - Article
AN - SCOPUS:84994521306
SN - 0272-8842
VL - 42
SP - 17963
EP - 17971
JO - Ceramics International
JF - Ceramics International
IS - 16
ER -