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High Temperature X-Ray Diffraction Study of Sol-Gel Derived Pb(ZrxTi1-x)O3 Powders

Published online by Cambridge University Press:  06 March 2019

M.J. Haun ,
Y.H. Lee ,
H.A. McKinstry  and
L.E. Cross
M.J. Haun
Affiliation:
Materials Research Laboratory The Pennsylvania State University University Park, PA 16802
Y.H. Lee
Affiliation:
Materials Research Laboratory The Pennsylvania State University University Park, PA 16802
H.A. McKinstry
Affiliation:
Materials Research Laboratory The Pennsylvania State University University Park, PA 16802
L.E. Cross
Affiliation:
Materials Research Laboratory The Pennsylvania State University University Park, PA 16802
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Abstract

The lattice parameters of sol-gel derived Pb(ZrxTi1-x)O3 powders were determined as a function of temperature using a microcomputer automated Picker x-ray diffractometer. The spontaneous strain was calculated from the lattice parameters, and used with other experimental data to develop a thermodynamic phenomenological theory for the PZT solid solution system. A second tricritical point, where the transition changes front first to second order, was found to occur near or possibly at the morphotropic phase boundary between the tetragonal and high temperature rhombohedral phases. Using an equation derived from the theory, the spontaneous tilt angle of the oxygen octahedra in the low temperature rhombohedral phase was calculated from the experimental spontaneous strain data.

Type
IX. High Temperature and Non-Ambient Powder Diffraction Applications
Information
Advances in X-Ray Analysis , Volume 30: Thirty-Fifth Annual Conference on Applications of X-ray Analysis, August 4-8, 1986 , 1986 , pp. 473 - 481
Copyright
Copyright © International Centre for Diffraction Data 1986

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