Ba-modified bismuth sodium titanate with composition 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3 (BNBT) was prepared by a citrate nitrate sol-gel combustion method. The sol was obtained using barium acetate, bismuth nitrate, sodium nitrate and a peroxo-citrate complex of titanium isopropoxide as starting precursors. Various molar ratios of citrate/nitrate (C/N) were considered for the sol production. The corresponding gels were fired at different temperatures (300, 400, 500°C) in order to evaluate the conditions necessary to obtain the decomposition of the precursors and the formation of the pure BNBT perovskitic phase in a single step. The best conditions to obtain the desired phase are: (C/N) = 0.2, and combustion temperature of 500°C. Ball milled powders were densified at a temperature 100◦C lower than the one generally used for powder produced with the conventional mixed oxide route. The electrical properties are comparable to those reported for conventionally prepared materials.

Sol-gel combustion synthesis of lead-free BNBT powders / E. Mercadelli; A. L. Costa; S. Albonetti; A. Sanson; C. Galassi;. - In: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY. - ISSN 0928-0707. - STAMPA. - 46:(2008), pp. 39-45. [10.1007/s10971-008-1693-4]

Sol-gel combustion synthesis of lead-free BNBT powders

MERCADELLI, ELISA;ALBONETTI, STEFANIA;
2008

Abstract

Ba-modified bismuth sodium titanate with composition 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3 (BNBT) was prepared by a citrate nitrate sol-gel combustion method. The sol was obtained using barium acetate, bismuth nitrate, sodium nitrate and a peroxo-citrate complex of titanium isopropoxide as starting precursors. Various molar ratios of citrate/nitrate (C/N) were considered for the sol production. The corresponding gels were fired at different temperatures (300, 400, 500°C) in order to evaluate the conditions necessary to obtain the decomposition of the precursors and the formation of the pure BNBT perovskitic phase in a single step. The best conditions to obtain the desired phase are: (C/N) = 0.2, and combustion temperature of 500°C. Ball milled powders were densified at a temperature 100◦C lower than the one generally used for powder produced with the conventional mixed oxide route. The electrical properties are comparable to those reported for conventionally prepared materials.
2008
Sol-gel combustion synthesis of lead-free BNBT powders / E. Mercadelli; A. L. Costa; S. Albonetti; A. Sanson; C. Galassi;. - In: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY. - ISSN 0928-0707. - STAMPA. - 46:(2008), pp. 39-45. [10.1007/s10971-008-1693-4]
E. Mercadelli; A. L. Costa; S. Albonetti; A. Sanson; C. Galassi;
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/64094
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