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Microstructural Development of ZnO Pellets Doped with Different Vanadium Oxides (V 2 O 5 and V 2 O 3 )
Author(s) -
MéndezMartínez Francisco,
Venegas Miriam J.,
Pfeiffer Heriberto
Publication year - 2007
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2007.02167.x
Subject(s) - vanadium , pentoxide , pellets , materials science , scanning electron microscope , zinc , doping , analytical chemistry (journal) , vanadium oxide , metallurgy , composite material , chemistry , optoelectronics , chromatography
This work presents the effect of zinc oxide (ZnO) ceramics, doped with different percentages of vanadium trioxide (V 2 O 3 ) and vanadium pentoxide (V 2 O 5 ). Samples were analyzed by X‐ray diffraction and scanning electron microscopy. The addition of V 2 O 3 or V 2 O 5 produced changes in the composition and morphology of the pellets. In both cases, different zinc vanadates were detected as secondary phases: α‐Zn 3 (VO 4 ) 2 and Zn 4 V 2 O 9 . Furthermore, when the vanadium concentration was equal to or higher than 3 wt%, the presence of filaments was detected on the surface of the pellets. These filaments were produced due to vanadium segregation. However, this effect was only observed at the surface of the pellets. On the bulk, the filaments were not observed. Instead, vanadium was found at the interfaces between the ZnO grains and at triple points, as it could be expected.