Synthesis of SnO2 by chemical routes and its use in varistors production
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Elsevier B.V.
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Resumo
Tin oxide, SnO2. is a very used compound in industry and one of its uses is as varistor. For the current requirements of the technology is necessary a strict control of the chemical purity and the particle size of the raw material; for that reason the great interest that exists at the moment to develop synthesis methods that allow to get these requirements. In this work, ceramic powders of the Sn-Co-Nb-Ti-Al system using the controlled precipitation and polymeric precursor (Pechini) methods were synthesized. The raw material obtained was characterized using X-ray diffraction (XRD), thermal analysis (DTA/FG) and scanning electron microscopy (SEM). The sintering samples shown a good varistor behavior with non-linear coefficient (alpha) values similar to 22, and Er 2083 V/cm(2). (c) 2007 Elsevier Ltd. All rights reserved.
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synthesis, powders-chemical preparation, electrical properties, varistors
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Inglês
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Journal of the European Ceramic Society. Oxford: Elsevier B.V., v. 27, n. 13-15, p. 3893-3896, 2007.
