Table of Contents
ISRN Nanotechnology
Volume 2011, Article ID 715183, 5 pages
http://dx.doi.org/10.5402/2011/715183
Research Article

Direct Preparation of Y2SiO5 Nanocrystallites by a Microwave Hydrothermal Process

1Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi'an Shaanxi 710021, China
2Shenzhen Key Laboratory of Special Functional Materials, Shenzhen University, Shenzhen, Guangdong 518086, China

Received 1 March 2011; Accepted 18 March 2011

Academic Editors: C.-L. Hsu and J.-K. Yoon

Copyright © 2011 Ya-Qin Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A novel fabrication technique of yttrium silicate (Y2SiO5) nanocrystallites has been investigated by a microwave hydrothermal process with a later heat treatment. The prepared powders were analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermal analysis, and field emission scanning electron microscopy (FESEM). Results show that high-purity yttrium silicate (Y2SiO5) powders can be synthesized by the microwave hydrothermal process with a later heat treatment at 700°C for 2 h. The Y2SiO5 precursor powders prepared by microwave hydrothermal process without heat treatment are weak crystallization, which shows an irregular and cotton-fiber-like morphology. After the heat treatment at 700°C for 2 h, well crystallized phase-pure Y2SiO5 powders with 400–600 nm grainy morphology are achieved. Further heat treatment at higher temperature will result in the sintering and serious agglomeration of the powders. The formation process of Y2SiO5 nanocrystallites was explained based on the photographs of SEM.