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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
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.

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Articles
Copyright
Copyright © Materials Research Society 2014 

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References

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