Interactions between Y2O3–Al mixture studied by solid-state reaction method |
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| Affiliation: | 1. Technical University of Munich, Germany;2. Aalto University, Finland;3. University of Iceland;1. Faculty of Mechanistic and Electric Engineering, Guangzhou University, Guangzhou, China;2. Department of Computer Science, The University of Auckland, Auckland 1142, New Zealand;1. Ho Chi Minh City University of Technology and Education, Ho Chi Minh City, Vietnam;2. Posts and Telecommunications Institute of Technology, Ho Chi Minh City, Vietnam |
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| Abstract: | Interactions between Y2O3–Al mixture studied by solid-state reaction method were investigated in present paper. Interactions between Y2O3–Al mixture was characterized by differential thermal and thermogravimetric analyses and X-ray diffraction, Y2O3–Al mixture and yttrium aluminum garnet (YAG) powder as final reaction product were characterized by scanning electron microscopy. The results show Al is isolated with Y2O3 by aluminum oxide layer in air, and no opportunity of directional reaction between Y2O3–Al systems. With temperature increasing to ～569 °C, aluminum partly turned into transitional aluminas, Y2O3 reacts with transitional aluminas instead of aluminum to form yttrium aluminum monoclinic (YAM) and yttrium aluminum perovkite (YAP) phases after calcination at 600 °C, 800 °C separately, and pure YAG powder is obtained after calcination at 1200 °C. From the point of view of reaction temperature, the reaction between Y2O3 and transitional aluminas is easier than that of Y2O3 and Al or α-Al2O3. |
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