Title: Perovskite nanoparticles synthesised by reactive milling combined with thermal processing: preparation, morphology and structure characterisation

Authors: Do Hung Manh, Tran Dang Thanh, Nguyen Xuan Phuc, Le Van Hong, Pham Thanh Phong, Luu Tien Hung

Addresses: Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay Distr., Hanoi, Vietnam. ' Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay Distr., Hanoi, Vietnam. ' Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay Distr., Hanoi, Vietnam. ' Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay Distr., Hanoi, Vietnam. ' Nha Trang Pedagogic College, 01 Nguyen Chanh Street, Nha Trang City, Khanh Hoa Province, Vietnam. ' Department of Physics, Vinh University, 182 Le Duan Street, Vinh City, Nghe An Province, Vietnam

Abstract: Reactive milling and thermal processing methods were used to prepare a large variety of perovskites like ABO₃ and La₂NiO₄. The single-phase nanoparticle of ABO₃ was synthesised at different milling times in dependence on the starting oxides. The grain size of ABO₃ nanoparticles in the range of 10-30 nm was conditional upon milling time. Single-phase nanoparticles of La₂NiO₄ were obtained by using 6 h milling combined with annealing at 750°C. A structure conversion from a layer into a single perovskite of La₂NiO₄ was observed as milling time increased, whereas the crystalline structure of ABO₃ remained almost unchanged. Further analysis of HRTEM images confirms a core-shell structure of nanoparticles.

Keywords: perovskite nanoparticles; perovskites; reactive milling; particle size; crystalline size; layer structures; selective area electron diffraction; high resolution TEM; transmission electron microscopy; nanotechnology; thermal processing.

DOI: 10.1504/IJNT.2011.038202

International Journal of Nanotechnology, 2011 Vol.8 No.3/4/5, pp.241 - 254

Published online: 21 Jan 2011 *

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