Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/1588
Title: Direct synthesis of varistor-grade doped nanocrystalline ZnO and its densification through a step-sintering technique
Authors: Anas, S
Mangalaraja, R V
Mukundan, P
Shukla, S K
Ananthakumar, S
Keywords: Direct synthesis
Doped zinc oxide
Step-sintering
Reflux
Composite varistors
Issue Date: 2007
Publisher: Elsevier
Citation: Acta Materialia 55(17):5792-5801;Oct 2007
Abstract: A direct synthesis of varistor-grade doped ZnO powder was attempted by simple hydrolysis followed by low-temperature refluxing (80 °C) in aqueous and alcoholic media. Rod like, one-dimensional nanocrystalline doped ZnO powders with crystallite size 24 nm and Brunauer–Emmett–Teller (BET) bulk surface area 22 m2 g−1 were synthesized. Sintering characteristics of these powders were analyzed under step-sintering coupled with rapid heating up to 1050 °C. The microstructural features and I–V characteristics of the step-sintered doped ZnO were compared with composite varistors. The study shows the advantage of the addition of nanosize doped varistor-grade ZnO as well as step-sintering for controlling grain size and improving varistor performance.
URI: http://ir.niist.res.in:8080/jspui/handle/123456789/1588
Appears in Collections:2007

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