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Controlled combustion synthesis and properties of fine-particle NASICON materials

Dhas, NA and Patil, KC (1994) Controlled combustion synthesis and properties of fine-particle NASICON materials. In: Journal of materials chemistry, 4 (3). pp. 491-497.

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Fine-particle NASICON materials, Na1+xZr2P3-xSixO12 (where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5), have been prepared by controlled combustion of an aqueous solution containing stoicthiometric amounts of sodium nitrate, zirconyl nitrate, ammonium perchlorate, diammonium hydrogen phosphate, fumed silica and carbonohydrazide. Formation of NASICON has been confirmed by powder XRD, Si-29 NMR and IR spectroscopy. These NASICON powders are fine (average agglomerate size 5-12 mum) with a surface area varying from 8 to 30 m2 g-1. NASICON powders pelletized and sintered at 1100-1200-degrees-C for 5 h achieved 90-95% theoretical density and show fine-grain microstructure. The coefficient of thermal expansion of sintered NASICON compact was measured up to 500-degrees-C and changes f rom -3.4 x 10(-6) to 4.1 x 10(-6) K-1. The conductivity of Sintered Na3Zr2PSi2O12 compact at 300-degrees-C is 0.236 OMEGA-1 cm-1.

Item Type: Journal Article
Publication: Journal of materials chemistry
Publisher: Royal society of chemistry
Additional Information: Copyright of this article belongs to Royal society of chemistry.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 26 Mar 2011 05:49
Last Modified: 26 Mar 2011 05:49
URI: http://eprints.iisc.ac.in/id/eprint/36309

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