Synthesis of ZnO based nanopowders via a non-hydrolytic sol gel technique and their densification behaviour and varistor properties

Autor: Shereef Anas, Poothayil Mukundan, Ayyappan M. Sanoj, Viswanathan R. Mangalaraja, Solaiappan Ananthakumar
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Processing and Application of Ceramics, Vol 4, Iss 1, Pp 7-14 (2010)
Druh dokumentu: article
ISSN: 1820-6131
Popis: Hexagonal nanocrystalline varistor grade ZnO particles with size 50 nm and the specific surface area of 28 m2/g have been prepared by non-aqueous gelation technique involving diethylene glycol and triethanolamine. The as-prepared varistor nanopowders were analyzed with the support of XRD, TG/DTA, FTIR, TMA, SEM and TEM. Varistor discs were fabricated by pressing and their densification was studied at 850, 950, 1050 and 1150°C. The evolution of varistor microstructures, extent of grain growth and the influence of microstructure on the I-V properties were explored and presented.
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