Effects of different sintering additives on the synthesis of γ-Y2Si2O7 powders |
| |
| Affiliation: | 1. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, Shannxi 710049, People''s Republic of China;2. Aerospace Research Institute of Material & Processing Technology, Beijing 100076, People''s Republic of China;1. College of Engineering, Nihon University, Koriyama, Fukushima 963-8642, Japan;2. National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan;3. The Institute of Science and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan;1. Lab of Polymer Composites Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;2. University of Science and Technology of China, Hefei, 230026, China;1. Institute for Low Temperature and Structure Research, Polish Academy of Sciences, Wroclaw, Poland;2. Laboratorio di Chimica dello Stato Solido, DB, Università di Verona and INSTM, UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy;3. CNR-IMM MATIS and Dipartimento di Fisica e Astronomia, Università di Catania, Via S. Sofia 64, 95123 Catania, Italy;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, Shandong, PR China;2. College of Science, China University of Petroleum, Qingdao 266580, Shandong, PR China;3. Interdisciplinary Nanoscience Center (iNANO), Centre for DNA Nanotechnology, Aarhus University, DK-8000 Aarhus C, Denmark |
| |
| Abstract: | Pure γ-Y2Si2O7 powders were synthesized by the solid-liquid reaction method using Y2O3 and SiO2 powders with Li2O, MgO or Al2O3 additives. The effects of the metallic ions Li+, Mg2+ and Al3+ on the synthesis process were systematically investigated by X-ray diffraction and differential scanning calorimetry. The chemical kinetics of the Y2Si2O7 synthetic process was calculated to illuminate the influences of the different metallic ions on the formation of silicate. The results indicate that the additives could effectively reduce the synthesis temperature by 100–300 °C. The apparent activation energy of the synthetic reaction was reduced by 79.75%, 65.16%, or 56.77% when 6 mol.% of Li2O, MgO, or Al2O3 was added, respectively, and the reaction rate was also significantly increased. |
| |
| Keywords: | Yttrium disilicate Calcination Solid-liquid reaction Oxides Viscosity |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
