Microstructure and nonohmic properties of binary ZnO-V2O5 ceramics sintered at 900°C

V2O5 was the only additive used and the amount ranged from 0.25 to 2 mol%. According to the microstructural observations, a change of grain-growth mechanism occurred from the isotropic growth behaviour of pure ZnO to the abnormal growth after doping with V2O5. This was attributed to the sintering of...

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Veröffentlicht in:	Materials letters 1996, Vol.26 (3), p.199-203
Hauptverfasser:	TSAI, J.-K, WU, T.-B
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Conductivity of specific materials Cross-disciplinary physics: materials science rheology Electronic transport in condensed matter Exact sciences and technology Materials science Materials synthesis materials processing Other heat and thermomechanical treatments Physics Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation Treatment of materials and its effects on microstructure and properties
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Zusammenfassung:	V2O5 was the only additive used and the amount ranged from 0.25 to 2 mol%. According to the microstructural observations, a change of grain-growth mechanism occurred from the isotropic growth behaviour of pure ZnO to the abnormal growth after doping with V2O5. This was attributed to the sintering of ZnO grains in the presence of a V2O5-rich liquid phase. The zinc oxide ceramics doped with V2O5 exhibited nonohmic behaviour. The nonlinear characteristics of these binary ceramics were strongly dependent on the V2O5 content and the microstructure. 15 refs.
ISSN:	0167-577X 1873-4979
DOI:	10.1016/0167-577X(95)00217-0