Please use this identifier to cite or link to this item:
|Title:||Effect of excess PbO on phase formation and properties of (Pb<inf>0.90</inf>Ba<inf>0.10</inf>)ZrO<inf>3</inf>ceramics|
Steven J. Milne
Steven J. Milne
|Keywords:||Engineering;Materials Science;Physics and Astronomy|
|Abstract:||Polycrystalline samples of (Pb0.90Ba0.10)ZrO3(PBZ) were prepared by a mixed oxide, solid-state reaction method. Excess PbO (3, 5 or 10 wt.%) was introduced prior to powder calcination to compensate for any PbO that may have been lost from the samples due to volatilisation during heat treatments. X-ray diffraction revealed that, compared to samples made from stoichiometric starting mixtures, a starting excess of PbO of ≥ wt.% increased the proportion of the rhombohedral PBZ phase which coexisted with the antiferroelectric orthorhombic phase. Microstructurally, excess PbO produced an increase in average grain size, from ∼1 μm for no excess to ~1.5 μm for ≥3 wt.% excess PbO. The fractured surfaces indicated predominantly intra-granular fracture in samples with no added PbO, or 3 wt.% excess PbO, whereas the 5 and 10 wt.% excess PbO samples displayed mainly inter-granular fracture. Dielectric constant-temperature plots showed a maximum peak value of 12,700 for the 3 wt.% sample which was also the most dense sample. © 2005 Elsevier B.V. All rights reserved.|
|Appears in Collections:||CMUL: Journal Articles|
Files in This Item:
There are no files associated with this item.
Items in CMUIR are protected by copyright, with all rights reserved, unless otherwise indicated.