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Direct synthesis of ultrafine tetragonal BaTiO3 nanoparticles at room temperature

Jian Quan Qi13*, Tao Peng3, Yong Ming Hu2, Li Sun2, Yu Wang2, Wan Ping Chen2, Long Tu Li3, Ce Wen Nan3 and Helen Lai Wah Chan2

Author Affiliations

1 Department of Materials Sciences and Engineering, Northeastern University at Qinhuangdao Branch, Qinhuangdao, Hebei Province, 066004, Peoples Republic of China

2 Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hong Kong, China

3 State Key Laboratory of Fine Ceramics and New Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

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Nanoscale Research Letters 2011, 6:466  doi:10.1186/1556-276X-6-466

Published: 23 July 2011

Abstract

A large quantity of ultrafine tetragonal barium titanate (BaTiO3) nanoparticles is directly synthesized at room temperature. The crystalline form and grain size are checked by both X-ray diffraction and transmission electron microscopy. The results revealed that the perovskite nanoparticles as fine as 7 nm have been synthesized. The phase transition of the as-prepared nanoparticles is investigated by the temperature-dependent Raman spectrum and shows the similar tendency to that of bulk BaTiO3 materials. It is confirmed that the nanoparticles have tetragonal phase at room temperature.

Keywords:
BaTiO3; nanoparticle; room temperature