Grain growth in sintered ZnO–1 mol% V2O5 ceramics
2003; Elsevier BV; Volume: 57; Issue: 8 Linguagem: Inglês
10.1016/s0167-577x(02)00999-0
ISSN1873-4979
AutoresHuey Hoon Hng, Lindawaty Halim,
Tópico(s)Advancements in Solid Oxide Fuel Cells
ResumoGrain growth of ZnO containing 1 mol% V2O5 was studied for sintering from 750 to 1200 °C in air. The results are discussed and compared with the previous studies in terms of the phenomenological kinetic grain growth expression: Gn−G0n=K0t exp(−Q/RT). Compared with the data found in the literature for pure ZnO, addition of 1 mol% V2O5 decreased the grain growth exponent to about 1.44, as well as reducing the apparent activation energy to 76±7 kJ/mol. These values indicate that the addition of V2O5 promotes liquid-phase sintering and increased the ZnO grain. These values are also compared with those obtained for ZnO–1 mol% Bi2O3 ceramics.
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