Molten salt synthesis of anisometric particles in the SrO-Nb2O5-BaO system |
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| Authors: | Cihangir Duran Gary L Messing Susan Trolier-McKinstry |
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| Affiliation: | Department of Materials Science and Engineering, Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA |
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| Abstract: | Acicular particles of KSr2Nb5O15, Sr0.5Ba0.5Nb2O6, and SrNb2O6 were synthesized in the SrO-BaO-Nb2O5 system, using KCl or SrCl2·6H2O salts. In the SrCl2·6H2O + Nb2O5 system, acicular SrNb2O6 particles were formed by a solid state reaction between the salt and Nb2O5. Large, irregularly shaped (Sr-rich) Sr2Nb2O7 particles formed with increasing reaction temperature and time. Small but finite solubility of SrO in the KCl + SrNb2O6 system favored the formation of acicular KSr2Nb5O15 and blade-like Sr2Nb2O7 particles (at higher temperatures). Uniformly sized, acicular KSr2Nb5O15 particles were easier to reproduce compared to the formation of acicular Sr0.5Ba0.5Nb2O6 and SrNb2O6 particles. |
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| Keywords: | A Ceramics B Chemical synthesis D Phase equilibria |
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