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Ceramic powders of Na1−xLixNbO3 (LNN) have been synthesized by an aqueous sol–gel route. These solid solutions were prepared from Na–Li–Nb precursor gel. The precursor was synthesized from Na–EDTA, Li–EDTA and Nb–citrate complexes and they acted as the source of Na, Li and Nb, respectively. Citric acid and ethylenediaminetetraacetic acid (EDTA) were used as the chelating agents for Na, Li and Nb. The precursor gel was calcinated on a muffle furnace at 750 ℃ for one hour and this provided the ceramic structures. Composites of LNN–biopolymers were prepared by the encapsulation of the ceramic structures into the biopolymeric scaffolds. The ceramic structures and composites were characterized by FTIR, NMR, TG and SEM analysis.


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Synthesis and characterization of sodium–lithium niobate ceramic structures and their composites with biopolymers

Show Author's information Thomas V. MATHEWSunny KURIAKOSE*( )
Research and Post Graduate Department of Chemistry, St. Thomas College, Pala, Arunapuram P.O., Kottayam, Kerala, India

Abstract

Ceramic powders of Na1−xLixNbO3 (LNN) have been synthesized by an aqueous sol–gel route. These solid solutions were prepared from Na–Li–Nb precursor gel. The precursor was synthesized from Na–EDTA, Li–EDTA and Nb–citrate complexes and they acted as the source of Na, Li and Nb, respectively. Citric acid and ethylenediaminetetraacetic acid (EDTA) were used as the chelating agents for Na, Li and Nb. The precursor gel was calcinated on a muffle furnace at 750 ℃ for one hour and this provided the ceramic structures. Composites of LNN–biopolymers were prepared by the encapsulation of the ceramic structures into the biopolymeric scaffolds. The ceramic structures and composites were characterized by FTIR, NMR, TG and SEM analysis.

Keywords:

ceramic structures, sol–gel chemistry, encapsulation, thermo gravimetric analysis (TGA)
Received: 02 October 2012 Revised: 07 December 2012 Accepted: 08 December 2012 Published: 06 April 2013 Issue date: March 2013
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Publication history

Received: 02 October 2012
Revised: 07 December 2012
Accepted: 08 December 2012
Published: 06 April 2013
Issue date: March 2013

Copyright

© The author(s) 2013

Acknowledgements

This work was financially supported by the University Grants Commission, New Delhi, India (No. MRP(S)-987/10-11/KLMG027/UGC-SWRO, February 10, 2011), and DST, Government of India (No. SR/S1/OC-24/2006, October 26, 2006).

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