Texture tolerance to B-site valence mismatch for [001] textured Pb97.5%Ba2.5%[(Zn1/3Nb2/3) ((1-x))-Ti-x]O-3 transparent ceramics
CERAMICS INTERNATIONAL
Authors: Hao, Mengmeng; Fan, Guifen; Cai, Wei; Zhou, Chuang; Zeng, Fangfang; Zhang, Jianjia; Wang, Yanjiong; Chen, Xin; Wang, Xiaohong; Lv, Wenzhong
Abstract
Transparent Pb97.5%Ba2.5% [(Zn1/3Nb2/3) ((1-x))-Ti-x]O-3 ceramics have been textured using BaTiO3 template. The influence of B-site valence mismatch between the host and the template on texture growth is investigated. The texture degree depends on the Ti4+ content in the host. The minimum Ti4+ content of 9% is necessary for texture growth. X composition in the vicinity of 9% is demonstrated at MPB where the maximum d(33) and k(p) is 660 pC/N and 63%, and a strain as high as 0.27% at 40 kV/cm is achieved. The transmittance of textured P97.5%B2.5% (ZN-4%T) ceramic is 47% at 600 nm and exceeds 60% at the wave length of 1000-3000 nm. This research gives a better understanding of texture growth and facilitates the designs of multi-functional devices.
Effect of three step sintering on piezoelectric properties of KNN-based lead free ceramics
CHEMICAL PHYSICS LETTERS
Authors: Zhang, Yang; Zhai, Jiwei; Xue, Shuangxi
Abstract
Four different KNN-based piezoceramics were prepared using a three-step sintering method. The crystal structures prepared by this three-step sintering were compared to those from conventional sintering and the different tolerance factors for the dopant effects on the piezoelectric properties were evaluated. The piezoelectric properties for the 0.96 (K0.5Na0.5)(0.95)Li0.05Nb0.93Sb0.07O3-0.04CaZrO(3) ternary system prepared with the three-step sintering method were obtained: the d(33) = 420 pC/N, strain levels of 0.18% at 40 kV/cm, and the piezoelectric constant decreased with an increase in the tolerance factor.
COA
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