Direct synthesis of ultrafine tetragonal BaTiO3 nanoparticles at room temperature
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
Nanoscale Research Letters 2011, 6:466 doi:10.1186/1556-276X-6-466Published: 23 July 2011
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.