Microwave-activated formation of lattice defects in alumina polycrystals consolidated by spark plasma sintering

Title
Microwave-activated formation of lattice defects in alumina polycrystals consolidated by spark plasma sintering
Author(s)
한영환L. Shen[L. Shen]S. Zhou[S. Zhou]J. Yang[J. Yang]Z. Li[Z. Li]X. Cao[X. Cao]B. Wang[B. Wang]A. Mukherjee[A. Mukherjee]C. Xiang[C. Xiang]H. Tang[H. Tang]이재형배소익김석영Q. Huang[Q. Huang]
Keywords
TRANSPARENT ALUMINA; LIGHT-SCATTERING; FIELD
Issue Date
201311
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SCRIPTA MATERIALIA, v.69, no.10, pp.728 - 731
Abstract
A wet-chemical synthesis and microwave calcination approach was found to be efficient for synthesizing alpha-alumina powders and polycrystals with high levels of lattice defects. The defects of the as-produced powders were determined from the optical transmittance of spark-plasma-sintered compacts with an identical microstructure using a conventional calcination method. The existence of a high lattice defect concentration was verified by positron annihilation lifetime analysis and X-ray diffraction. The microwave-activated lattice defect phenomenon has potential applications in the production of semiconductor materials or films with high chemical activity or crystal doping. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/28655http://dx.doi.org/10.1016/j.scriptamat.2013.08.012
ISSN
1359-6462
Appears in Collections:
공과대학 > 신소재공학부 > Articles
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