Mechanochemical reaction in the K2CO3–Nb2O5 system |
| |
| Authors: | Tadej Rojac Marija Kosec Maria Połomska Bożena Hilczer Primož Šegedin Andreja Bencan |
| |
| Affiliation: | 1. Jo?ef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia;2. Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland;3. Faculty of Chemistry and Chemical Technology, University of Ljubljana, A?ker?eva 5, 1000 Ljubljana, Slovenia;1. Jo?ef Stefan Institute, Electronics Ceramics Department (K5), Ljubljana, Slovenia;2. Jo?ef Stefan International Postgraduate School, Ljubljana, Slovenia;3. CoE NAMASTE, Ljubljana, Slovenia;1. Jo?ef Stefan Institute, Electronic Ceramics Department, Jamova cesta 39, 1000 Ljubljana, Slovenia;2. Jo?ef Stefan International Postgraduate School, Jamova cesta 39, 1000 Ljubljana, Slovenia;1. Université François Rabelais de Tours, CNRS, CEA, ENIVL, GREMAN UMR 7347, IUT de BLOIS 15 rue de la chocolaterie, CS 2903, 41029 Blois Cedex, France;2. Laboratoire des Sciences des Procédés et des Matériaux, CNRS, LSPM – UPR 3407, Université Paris 13, Sorbonne Paris Cité, 99 Avenue J.B. Clément, 93430 Villetaneuse, France;3. Université de Montpellier 2, IES, UMR 5214, Place E. Bataillon, 34095 Montpellier, France;1. Department of Material Science and Engineering, University of Sheffield, Mappin St., Sheffield, S1 3JD, UK;2. Department of Engineering and Mathematics, Materials Engineering, Sheffield Hallam University, Sheffield, S1 1WB, UK;3. Materials Engineering, NED University of Engineering & Technology, Karachi, 75270, Pakistan;4. Department of Physics, Abdul Wali Khan University, Mardan, 23200, Pakistan;1. Laboratoire GREMAN UMR 7347, Université de Tours - CNRS - INSA-CVL, IUT de BLOIS, 15 rue de la Chocolaterie CS 32903, 41029 Blois Cedex, France;2. Laboratoire des Sciences des Procédés et des Matériaux, CNRS - LSPM – UPR 3407, Université Paris, 13 Sorbonne Paris Cité, 99 Avenue J.B. Clément, 93430 Villetaneuse, France.;3. Université de Limoges, CNRS, IRCER, UMR 7315, Centre Européen de la Céramique, 12 Rue Atlantis, 87068 Limoges Cedex, France |
| |
| Abstract: | We studied the mechanochemical synthesis of KNbO3, starting from a powder mixture of K2CO3 and Nb2O5. The milling experiments were designed with different ball-impact energies in order to investigate the mechanochemical reactions. X-ray diffraction, thermogravimetric analysis, infrared spectroscopy, Raman spectroscopy and transmission electron microscopy were used to characterize the samples. Based on the results, we propose a mechanism for the mechanochemical reaction between K2CO3 and Nb2O5. The first stage of the reaction is characterized by the formation of an amorphous carbonato complex, which decomposes after prolonged milling at higher ball-impact energy giving rise to the crystallization of KNbO3 and other niobate phases with a molar ratio K/Nb < 1. The reaction course is discussed and compared with the Na2CO3–Nb2O5 system. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
