Crystal structure refinement of (Pb sub(1-x)Ca sub(x))ZrO sub(3) by the Rietvelt method

Superlattice structures in rhombohedral perovskite (Pb sub(1-x)Ca sub(x))ZrO sub(3), which has high dielectric constant with small temperature coefficient and high Q value at microwave frequencies, were refined by the X-ray Rietvelt powder profile analysis. The superlattice structure is caused by sl...

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Bibliographic Details
Published in:JPN J APPL PHYS PART 1 REGUL PAP SHORT NOTE REV PAP 1993-01, Vol.32 (9B), p.4356-4359
Main Authors: Kato, Junichi, Fujii, Masaru, Kagata, Hiroshi, Nishimoto, Keiji
Format: Article
Language:English
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Summary:Superlattice structures in rhombohedral perovskite (Pb sub(1-x)Ca sub(x))ZrO sub(3), which has high dielectric constant with small temperature coefficient and high Q value at microwave frequencies, were refined by the X-ray Rietvelt powder profile analysis. The superlattice structure is caused by slight displacement of lead and zirconium ions from the ideal perovskite sites, together with twisting and deformation of oxygen octahedra. The Q value of (PbCa)ZrO sub(3) at microwave frequencies has no relation to the formation of the superlattice structures, as indicated by the absence of cation ordering.
ISSN:0021-4922