Sintering of tin oxide using zinc oxide as a densification aid
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
15/09/2004
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Resumo |
The physicochemical electronic characteristics of SnO2 render it useful in many technical applications, including ceramic varistors, stable electrodes used in electric glass-melting furnaces and electrometallurgy of aluminum, transparent windows and chemical sensors. The use of ZnO as a sintering aid was explored in this study to obtain SnO2 as a dense ceramic. Compacts were obtained by mechanical mixing of oxides, isostatic pressing at 210 MPa and sintering in situ inside a dilatometer at heating rates of 10degreesC/min. The grain size and microstructure were investigated by scanning and transmission electron microscopy (SEM/TEM). The phases and chemical composition were analyzed by energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results indicated that ZnO acts as a densification aid for SnO2, improving its grain growth with additions of up to 2 mol%. ZnO forms a solid solution with SnO2 UP to 1 mol%, above which SnZnO3 precipitates in the grain boundary, potentially inhibiting shrinkage and grain growth. (C) 2004 Kluwer Academic Publishers |
Formato |
5825-5830 |
Identificador |
http://dx.doi.org/10.1023/B:JMSC.0000040095.03906.61 Journal of Materials Science. Dordrecht: Kluwer Academic Publ, v. 39, n. 18, p. 5825-5830, 2004. 0022-2461 http://hdl.handle.net/11449/32718 10.1023/B:JMSC.0000040095.03906.61 WOS:000225021700028 |
Idioma(s) |
eng |
Publicador |
Kluwer Academic Publ |
Relação |
Journal of Materials Science |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |