LATTICE CONSTANTS AND PHASE TRANSITION OF Pb(HfxTi1 - x)O3

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Abstract:

The solid solutions of PbHfxTi1 - xO3 were synthesized by the oxidant-peroxo method in the titanium rich region (x ≤ 0.5). Lattice parameters at room temperature were investigated as a function of x by means of powder X-ray diffraction and Rietveld analysis. The phase transition between the room-temperature tetragonal to the high-temperature cubic phase was studied by DSC and dielectric measurement. Phase transitions detected in both experiments were shifted to low temperatures and smeared with increasing x. The effects of Hf/Ti substitution on PbTiO3 were compared with those of Zr/Tifor samples prepared by the same way. It was clarified that the lattice constant c and the phase transition were more sensitive to Hf content than to Zr content.

Keywords: Pb(HfxTi1 -x)O3; Pb(ZrxTi1 -x)O3; lattice constant; phase transition

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10584580802540603

Affiliations: 1: Department of Applied Physics, National Defense Academy, Yokosuka, Kanagawa, Japan 2: Department of Chemistry, Tokai University, Hiratsuka, Kanagawa, Japan

Publication date: January 1, 2008

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