Facile Fabrication of Highly Transparent Yttria Ceramics with Fine Microstructures by a Hot-Pressing Method

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[1] Gan, Lin
[2] Park, Young-Jo
[3] Park, Mi-Jung
[4] Kim, Haneul
[5] Kim, Jin-Myung
[6] Ko, Jae-Woong
[7] Lee, Jae-Wook
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Park, Young-Jo | 1600年 / Blackwell Publishing Inc., Postfach 10 11 61, 69451 Weinheim, Boschstrabe 12, 69469 Weinheim, Deutschland, 69469, Germany卷
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In this study; we report highly transparent yttria ceramics fabricated by a facile hot-pressing method with tantalum foil shielding which effectively prevents the ceramic samples from carbon contamination caused by the graphite mold used during the process. The hot-pressed sample was already highly transparent without a post-annealing step or hot isostatic pressing. For a 2-mm-thick specimen doped with 1 at.% ZrO2; the in-line transmittance reaches 74.4% at 400 nm and 81.1% at 1100 nm. The sample shows a very fine microstructure with an average grain size of about 1 μm owing to the low sintering temperature of only 1600°C. The study results indicate that it is possible to produce transparent yttria ceramics with excellent optical transparency using the economical and convenient hot-pressing method. © 2015 The American Ceramic Society;
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