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- Title:
- Preparation and characterization of nanosized SrBi2Nb2O9 powder by the combustion synthesis
- Universidade Federal de São Carlos (UFSCar)
- Universidade Estadual Paulista (UNESP)
- 0167-577X
- This work presents the preparation of SrBi2Nb2O9 (SBN) directly by the combustion synthesis. Strontium nitrate, niobium ammonium oxalate (NH4H2[NbO-(C2O4)(3)].3H(2)O) and bismuth oxide were used as oxidant reactants and urea as fuel. The influence of the fuel was evaluated by the addition of different fuel amounts (50%, 100%, 200% and 300%), 100% being the stoichiometric proportion. The XRD patterns showed that the SBN perovskite crystallized as the majority phase. The as-synthesized stoichiometric powder presented a specific surface area of around 13 m(2)/g and a mean grain size of around 16 nm. Dilatometric measurements showed that the maximum sintering rate occurs at 1275degreesC. The determination of the ferroparaelectric transition showed a Curie temperature (T-c) of 429degreesC. (C) 2002 Elsevier B.V. B.V. All rights reserved.
- 1-Jun-2003
- Materials Letters. Amsterdam: Elsevier B.V., v. 57, n. 19, p. 2812-2816, 2003.
- 2812-2816
- Elsevier B.V.
- combustion synthesis
- SrBi2Nb2O9
- powder
- ferroelectric
- bismuth layer
- http://dx.doi.org/10.1016/S0167-577X(02)01380-0
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/39165
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