期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 32, 期 11, 页码 2957-2964出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2012.02.052
关键词
YAG; Transparency; SPS; Dispersion; Annealing
A fine-grained (330 nm) yttrium aluminium garnet (YAG) ceramic, presenting a non-negligible transparency (66% RIT at 600 nm), was obtained by spark plasma sintering. The YAG powder was manufactured by co-precipitation, starting from a yttrium and aluminium chlorides solution. A soft precursor was obtained, whose phase evolution was studied by X-ray diffraction. Calcined powders were dispersed by either ball milling or by ultrasonication and then subjected to spark plasma sintering at several temperatures (1200-1400 degrees C) and for a reduced time (15 min). It is shown that the dispersion method plays a key role in enhancing the optical characteristics of YAG ceramics, in order to obtain a material with a small grain size, transparent in both the visible and the infrared range. (C) 2012 Elsevier Ltd. All rights reserved.
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