Synthesis of nanosize powders and thin films of Yb-doped YAG by sol-gel methods

WANG, H., HUANG, Y. Z., RODENBURG, J. M. and SIMMONDS, M. C. (2003). Synthesis of nanosize powders and thin films of Yb-doped YAG by sol-gel methods. Chemistry of materials, 15 (18), 3474-3480.

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Link to published version:: 10.1021/cm021248l S0897-4756(02)01248-6

Abstract

Yb-doped YAG is becoming a very promising optical material. We present a synthesis of single-phase Yb-doped YAG powders and thin films at a significantly lower temperature by sol-gel methods than by other conventional techniques. Yb-doped YAG powders and thin films on Si(100) substrates with a series of different doping concentrations were prepared. The lattice deformation, IR, and Raman vibrations were studied via the change of the doped concentration. This could be one of the reasons why, in general, about 20 atomic % Yb:YAG presents the better laser and scintillation properties. Scanning electron microscopy and transmission electron microscopy were used to investigate the morphology of the structures. A strong preferred orientation of crystal growth in thin films was found during the conversion of the structure from amorphous to crystalline. The Avrami model was used to analyze the isothermal transformation kinetics. On the basis of the experimental results, the effective activation energy of crystallization in the thin films was calculated as 653 ± 10 kJ/mol.

Item Type: Article
Additional Information: Copyright © 2003 American Chemical Society
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1021/cm021248l S0897-4756(02)01248-6
Depositing User: Ann Betterton
Date Deposited: 07 Feb 2008
Last Modified: 09 Dec 2009 18:23
URI: http://shura.shu.ac.uk/id/eprint/355

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