TY - JOUR
T1 - Optical and electrical properties of pressureless sintered transparent (K0.37Na0.63)NbO3-based ceramics
AU - Yang, Dong
AU - Ma, Chao
AU - Yang, Zupei
AU - Wei, Lingling
AU - Chao, Xiaolian
AU - Yang, Zhenyu
AU - Yang, Jinglun
N1 - Funding Information:
This work has been supported by the National Science Foundation of China (NSFC) (Grant nos. 51572163 , 51577111 , 51172136 , 21401123 and 51107077 ), the Fundamental Research Funds for the Central Universities (Program nos. GK201403006 , GK201402061 , GK201301002 , GK201101003 and GK201101004 ), Innovation Funds of Graduate Programs, Shaanxi Normal University (Grant no. X2014YB05 ), Scientific and Technology Research Project in Xi’an (Program no. CXY1342(4) ).
Publisher Copyright:
© 2015 Elsevier Ltd and Techna Group S.r.l.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - Lead-free (1-x)(K0.37Na0.63)NbO3-xCa(Sc0.5Nb0.5)O3 (x=0.050, 0.070, 0.090, 0.095 and 0.100) transparent ferroelectric ceramics have been fabricated by pressureless sintering procedure. Transmittance of 0.91(K0.37Na0.63)NbO3-0.09Ca(Sc0.5Nb0.5)O3 ceramics sintered in sealed alumina crucible was 15% higher than those sintered unsealed in air. By increasing the content of Ca(Sc0.5Nb0.5)O3, the phase structure of (K0.37Na0.63)NbO3 ceramics transformed from orthorhombic to tetragonal symmetry first and then to pseudo cubic symmetry. The 0.91(K0.37Na0.63)NbO3-0.09Ca(Sc0.5Nb0.5)O3 ceramics exhibited high density (98%), high transmittance (60%) in the near-IR region and relatively good electrical properties (εr=1914, tanδ=0.037, Tc=147 °C, Pr=6.88 μC/cm2, Ec=8.49 kV/cm). Meanwhile, the introduction of Ca(Sc0.5Nb0.5)O3 induced a composition fluctuation in the (K0.37Na0.63)NbO3 lattice and made the ceramics more relaxor-like, which would lead to a further reduction of light scattering. These results demonstrated that 0.91(K0.37Na0.63)NbO3-0.09Ca(Sc0.5Nb0.5)O3 could be promising lead-free transparent ferroelectric ceramics.
AB - Lead-free (1-x)(K0.37Na0.63)NbO3-xCa(Sc0.5Nb0.5)O3 (x=0.050, 0.070, 0.090, 0.095 and 0.100) transparent ferroelectric ceramics have been fabricated by pressureless sintering procedure. Transmittance of 0.91(K0.37Na0.63)NbO3-0.09Ca(Sc0.5Nb0.5)O3 ceramics sintered in sealed alumina crucible was 15% higher than those sintered unsealed in air. By increasing the content of Ca(Sc0.5Nb0.5)O3, the phase structure of (K0.37Na0.63)NbO3 ceramics transformed from orthorhombic to tetragonal symmetry first and then to pseudo cubic symmetry. The 0.91(K0.37Na0.63)NbO3-0.09Ca(Sc0.5Nb0.5)O3 ceramics exhibited high density (98%), high transmittance (60%) in the near-IR region and relatively good electrical properties (εr=1914, tanδ=0.037, Tc=147 °C, Pr=6.88 μC/cm2, Ec=8.49 kV/cm). Meanwhile, the introduction of Ca(Sc0.5Nb0.5)O3 induced a composition fluctuation in the (K0.37Na0.63)NbO3 lattice and made the ceramics more relaxor-like, which would lead to a further reduction of light scattering. These results demonstrated that 0.91(K0.37Na0.63)NbO3-0.09Ca(Sc0.5Nb0.5)O3 could be promising lead-free transparent ferroelectric ceramics.
UR - http://www.scopus.com/inward/record.url?scp=84957727677&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84957727677&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2015.11.032
DO - 10.1016/j.ceramint.2015.11.032
M3 - Article
AN - SCOPUS:84957727677
SN - 0272-8842
VL - 42
SP - 4648
EP - 4657
JO - Ceramics International
JF - Ceramics International
IS - 4
ER -