Synthesis of La0.9Sr0.1Al0.85Mg0.1Co0.05O2.875 using a polymeric method |
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| Authors: | Shuai Li Bill Bergman Zhe Zhao |
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| Affiliation: | 1. Department of Materials Science and Engineering, School of Industrial Engineering and Management, Royal Institute of Technology, SE 10044 Stockholm, Sweden;2. Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, SE 10691 Stockholm, Sweden;1. Department of Chemistry and Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, PR China;2. Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Organic Solids, Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China;1. Department of Physics, Jadavpur University, Kolkata 700 032, India;2. West Bengal State University, Kolkata, India;3. Indian Institute of Engineering Science and Technology, Shibpur, India;1. Korea Institute of Materials Science, 797 Changwondaero, Changwon 642-831, Republic of Korea;2. Department of Mechanical Engineering, Changwon National University, Changwon 641-773, Republic of Korea;3. Department of Mechanical Engineering, University of Delaware, Newark, DE 19716, USA;1. College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, PR China;2. College of Physical Engineering, Zhengzhou University, Zhengzhou 450052, PR China;3. Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands;1. Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo #140, Saltillo 25294, Coahuila, Mexico;2. Instituto Tecnológico de Saltillo, V. Carranza 2400, Saltillo 25280, Coahuila, Mexico |
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| Abstract: | Nanocrystalline La0.9Sr0.1Al0.85Mg0.1Co0.05O2.875 (LSAMC) powders were synthesized via a polymeric method using poly(vinyl alcohol) (PVA). The effect of PVA content on the synthesized powders was studied. When the ratio of positively charged valences (Mn+) to hydroxyl groups ( OH) is 1.5:1, crystalline LaAlO3 could be obtained at such a low calcination temperature as 700 °C. While at 900 °C the ratio is of less importance, since pure LaAlO3 perovskite could be formed for all powders after calcination at 900 °C. Thermal analysis (TG/DTA) was utilized to characterize the thermal decomposition behaviour of precursor powders. The chemical structure of the calcined powder was studied by Fourier transform infrared (FTIR) spectroscopy. The powder morphology and microstructure were examined by SEM. Dense pellets with well-developed submicron microstructures could be formed after sintering at 1450 °C for 5 h. Compared with the solid-state reaction method, the sintering temperature is substantially lower for powder prepared by the PVA method. This is due to the ultrafine and highly reactive powder produced. |
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