Order–disorder reactions in the ferroelectric perovskites Pb(Sc 1/2 Nb 1/2 )O 3  and Pb(Sc 1/2 Ta 1/2 )O 3 . I. Kinetics of the ordering process | Zendy

Stenger C. G. F. | Zendy; Burggraaf A. J. | Zendy

Open Access

Order–disorder reactions in the ferroelectric perovskites Pb(Sc 1/2 Nb 1/2 )O 3 and Pb(Sc 1/2 Ta 1/2 )O 3 . I. Kinetics of the ordering process

Author(s) -

Stenger C. G. F.,

Burggraaf A. J.

Publication year - 1980

Publication title -

physica status solidi (a)

Language(s) - English

Resource type - Journals

eISSN - 1521-396X

pISSN - 0031-8965

DOI - 10.1002/pssa.2210610132

Subject(s) - nucleation , chemistry , annealing (glass) , kinetics , crystallography , ferroelectricity , dielectric , materials science , physics , organic chemistry , optoelectronics , quantum mechanics , composite material

The perovskites Pb(Sc 1/2 Nb 1/2 )O 3 and Pb(Sc 1/2 Ta 1/2 )O 3 can be obtained in a disordered state by means of a synthesis at high temperature (1250 to 1500°C). Ordering of the trivalent and pentavalent ions occurs during annealing at lower temperatures. The kinetics of this ordering process are investigated by means of X‐ray diffraction, dielectric polarisation, and DSC measurements. The ordering process proceeds via a nucleation‐growth process and the average diameter of the ordered domains as a function of the annealing time is determined by X‐ray line broadening. Disordering experiments are carried out on Pb(Sc 1/2 Nb 1/2 )O 3 and an order‐disorder transition temperature of 1210°C is yielded.

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