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Cerâmica

Print version ISSN 0366-6913On-line version ISSN 1678-4553

Abstract

KUPCHAK, L. et al. Investigation of the sintering kinetics for initial stage in SnO2: ZnO system. Cerâmica [online]. 2005, vol.51, n.319, pp.308-312. ISSN 0366-6913.  http://dx.doi.org/10.1590/S0366-69132005000300022.

The sintering of SnO2:0.6 mol% ZnO obtained by powder mixtures was investigated by dilatometry at constant heating rates 2.5, 5.0 and 10.0 ºC.min-1. Using classical sintering models of Woolfrey-Bannister and Johnson to analyze the initial stage sintering, the calculated activation energy was 547 kJ.mol-1 and 511 kJ.mol-1, respectively. The coexistence of the two sintering mechanisms, volume diffusion and grain boundary diffusion, was found to control the initial stage sintering of the SnO2:0.6 mol % ZnO system.

Keywords : sintering; SnO2; kinetics; mechanisms; activation energy.

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