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Synthesis and Characterization of NaNbO3 Mesostructure by a Microwave-Assisted Hydrothermal Method

Published online by Cambridge University Press:  18 September 2014

Guilhermina F. Teixeira ,
Maria Ap. Zaghete ,
José A. Varela  and
Elson Longo
Guilhermina F. Teixeira
Affiliation:
Chemistry Institute - UNESP, 55, Professor Francisco Degni Street, Araraquara, Brazil
Maria Ap. Zaghete
Affiliation:
Chemistry Institute - UNESP, 55, Professor Francisco Degni Street, Araraquara, Brazil
José A. Varela
Affiliation:
Chemistry Institute - UNESP, 55, Professor Francisco Degni Street, Araraquara, Brazil
Elson Longo
Affiliation:
Chemistry Institute - UNESP, 55, Professor Francisco Degni Street, Araraquara, Brazil
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Abstract

In the present work, we report the synthesis and characterization of NaNbO3 particles obtained by microwave-assisted hydrothermal method from Nb2O5 and NaOH. The synthesis was made at different periods at 180 °C and 300W. The crystallization of NaNbO3 structures produced Na2Nb2O6.H2O in the intermediate phase with fiber-like morphology, and this is associated with the synthesis time. Pure orthorhombic NaNbO3 with cube-like morphology originates after synthesizing for 240 minutes. To verify the remnant polarization of particles, films were obtained by electrophoresis process and sintered at 800°C for 10 minutes in a microwave furnace. The films characterization indicated that films of niobate with fiber-like morphology present remaining polarization, and the morphology of cubes did not show remaining polarization. Considering these results, it can be concluded that the morphology implemented ferroelectric property of NaNbO3.

Keywords

Nbmicrowave heatingmorphology
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1675: Symposium K/RR – Synthesis, Characterization and Applications of Functional Materials—Thin Films and Nanostructures , 2014 , pp. 145 - 150
Copyright
Copyright © Materials Research Society 2014 

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References

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