Preparation of CaTiO3 fine powders by the hydrothermal method |
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| Affiliation: | 1. Teleinformatics Engineering, Federal University of Ceará, Pici Campus, Fortaleza, Ceará, Brazil;2. Department of Physics, (LOCEM), Federal University of Ceará (UFC), Pici Campus, Fortaleza, Ceará, Brazil;3. Chemistry Department, Federal University of Ceara, Pici Campus, Fortaleza, Ceará, Brazil;4. Federal University of Semiarid Region, UFERSA, Mossoro, RN, 59625-900, Brazil;5. Department of Electronics and Communication Engineering, Lovely Professional University, Phagwara, Punjab, India;1. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;2. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China;3. Ningbo Institute of Dalian University of Technology, Ningbo 315000, China;1. State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;2. School of Science, Lanzhou University of Technology, Lanzhou 730050, China |
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| Abstract: | Fine powders consisting of 0.1–0.5 μm size crystallites of CaTiO3 are prepared at 150–200°C by the hydrothermal method starting from hydrated titania gel and reactive calcium oxide suspended as an aqueous slurry in an autoclave. The resulting high-purity CaTiO3 is characterised by TEM, X-ray powder diffraction, chemical analyses and sintering characteristics. The hydrothermally prepared CaTiO3 powders are sinterable to high-density ceramics below 1400°C. The dc conductivity behaviour of the chemically reduced ceramics is presented. |
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