Preparation and characterization of monodispersed BaTiO3 nanocrystals by sol-hydrothemal method

被引：46

作者：

Zheng, Hongjuan ^{[1
]}

Zhu, Kongjun ^{[1
]}

Wu, Qingliu ^{[2
]}

Liu, Jinsong ^{[1
]}

Qiu, Jinhao ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R China

[2] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA

来源：

JOURNAL OF CRYSTAL GROWTH | 2013年 / 363卷

关键词：

BaTiO3; Sol-hydrothermal method; Perovskite structure; Mesocrystal; BARIUM-TITANATE; CRYSTALLINE BATIO3; PARTICLES; GROWTH; MECHANISM; ROUTE; MORPHOLOGY; KINETICS;

D O I：

10.1016/j.jcrysgro.2012.11.019

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Monodispersed barium titanate (BT) nanopowders with perovskite structure were successfully prepared by a solhydrothermal method. The results obtained from X-ray diffraction (XRD) revealed that BT particles with single cubic phase were favorably formed with low alkalinity, whereas tetragonal phase was observed with the enhancement of the alkalinity. Furthermore, electronic microcopy observations demonstrated that spherical aggregates of nanocrystals in final BT products transformed into mesocrystals with circular shape, and then into single crystals with rectangular shape as the alkalinity was elevated from 0.2 M to 1 M, concurrent with the decrease in average particle size. A mechanism involving the Ba/Ti ratio in the initial solution was proposed to illustrate the transformation of morphology and formation of crystals. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：300 / 307

页数：8

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