Stabilization of moisture-reactive raw materials for improved synthesis of Ca-α-SiAlON:Eu2+ phosphor |
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| Institution: | 1. School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 200235, China;2. School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, China;3. Department of Electronics and Information Materials, Shanghai University, Shanghai 200072, China;1. Department of Chemistry, Faculty of science AISECT University, Bhopal, India;2. Department of Physics, R. T. M. Nagpur University, Nagpur 440033, India;3. P.G. Department of Physics & Electronics, DAV College, Amritsar 143001, Punjab, India;1. State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China;2. Department of Physics and Interdisciplinary Program of Biomedical, Mechanical & Electrical Engineering, Pukyong National University, Busan 608-737, Republic of Korea;1. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan;2. Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan;3. Quantum Beam Science Center, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan;4. Takasaki Advanced Radiation Research Institute, Japan Atomic Energy Agency, 1233 Watanuki, Takasaki, Gunma 370-1292, Japan;5. Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan;6. Graduate School of Engineering, Nagoya University, Furo-cho, Chigusa-ku, Nagoya 464-8603, Japan;1. Department of Physics, King Mongkut''s University of Technology Thonburi, Bangkok 10140, Thailand;2. IMRAM, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan;3. NICHe, Tohoku University 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan;4. Institute of Physics, AS CR, Cukrovarnicka 10, Prague 16253, Czech Republic |
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| Abstract: | The raw materials needed to make the Ca-α-SiAlON:Eu2+ phosphor contain highly moisture-reactive Ca3N2. Exposing them to a preheating process prior to high-temperature synthesis stabilized the raw materials against oxidation. Preheating above 1200 °C in a tube furnace directly connected to a glove box, resulted in the formation of intermediate phases such as CaAlSiN3, which provided higher moisture resistance to the raw materials. We found that even after exposure to a humid environment, the preheated samples maintained PL characteristics similar to the conventional unexposed samples, while the PL intensity and particle homogeneity of the un-preheated samples were severely deteriorated. |
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| Keywords: | Nitride Oxynitride SiAlON Phosphor Stabilization |
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