Microstructure of (Ba0.75,Sr0.25)TiO3 based glass-ceramics doped by Mn

Scanning Probe Microscopy 2018

Turygin, A.P.^1 ; Abramov, A.S.^1 ; Alikin, D.O.^1 ; Chezganov, D.S.^1 ; Esin, A.A.^1 ; Baturin, I.S.^1 ; Song, X.^2 ; Zhang, T.^2 ; Zhang, Y.^2 ; Hu, K.^2 ; Zhao, Z.^2 ; Shur, V. Ya.^1

School of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg

620000, Russia^1

Beijing Key Laboratory of Fine Ceramics, State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing

100084, China^2

关键词: Controlled crystallization;    Dendrite structures;    Domain structure;    Faceted grains;    Fractal approach;    Individual grains;    Microscopic methods;    Piezoresponse;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/443/1/012037/pdf
DOI  :  10.1088/1757-899X/443/1/012037

来源: IOP

【 摘 要 】

We studied microstructure, surface morphology, and domain structure of (Ba0.75,Sr0.25)TiO3 based glass-ceramics with different amount of Mn additive (from 0 to 0.5%) prepared from melted and quenched mixed powders using several microscopic methods. The as-quenched sample was annealed and subjected to a controlled crystallization in air for 2h at temperatures 850 and 950?C. It was shown that the addition of the Mn up to 0.5% had no impact on morphology and domain structure. The dendrite structure was revealed in the samples crystallized at 850?C. The geometry of the clusters was analysed in terms of fractal approach. The faceted grains with size about 150 nm were found in ceramics annealed at 950?C. Individual grains demonstrated non-uniform piezoresponse, which could be attributed to existence of domain structure.