Effect of mechanical activation of coprecipitated precursor on synthesis of La2Zr2O7 |
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| Affiliation: | 1. The Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center, Russian Academy of Sciences, Akademgorodok 26a, Apatity, Murmansk Region 184209, Russia;2. Murmansk State Technical University, Apatity Branch, Fersman St., 50a, Apatity, Murmansk Region 184209, Russia;3. Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia;4. Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg 194021, Russia;1. Technische Universität Bergakademie Freiberg, Freiberg, Germany;2. Institute for Applied Materials, Karlsruhe Institute of Technology, Karlsruhe, Germany;1. Technische Universität Bergakademie Freiberg, Freiberg, Germany;2. Institute for Applied Materials, Karlsruhe Institute of Technology, Karlsruhe, Germany;1. College of Engineering, Bohai University, Jinzhou 121013, China;2. College of New Energy, Bohai University, Jinzhou 121013, China;1. Department of Energy Engineering, Hanyang University, Seoul, 133-791, Republic of Korea;2. School of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam, 641-773, Republic of Korea;3. Korea Institute of Ceramic Engineering and Technology, 3321 Gyeongchung Rd. Shindun-myeon, Gyeonggi-do, 17303, Republic of Korea |
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| Abstract: | A lanthanum zirconate (La2Zr2O7, LZ) precursor has been prepared by coprecipitation of the relevant hydroxides from nitrate solution. The effect of the mechanical activation of the precursor on its thermal decomposition and LZ formation in the temperature range of 700–1100 °C has been investigated. After mechanical activation, the precursor releases volatile components (H2O and CO2) at lower temperatures. Mechanical activation accelerates the LZ crystallisation and results in the formation of phase-pure LZ without admixtures of unreacted zirconia and lanthana. The LZ powder prepared from the mechanically activated precursor is characterised by a larger BET surface area, in comparison to that synthesised from the as-prepared precursor under the same calcination conditions. |
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| Keywords: | Coprecipitation Mechanical activation A Calcination |
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