Dielectric properties of high-pressure synthesized relaxor PbMg(1/3)Nb(2/3)O(3) ceramics

resumo

Single-phase perovskite PbMg(1/3)Nb(2/3)O(3) (PMN) ceramics were synthesized from stoichiometric oxide mixtures under conditions of high pressures and temperatures. Results of dielectric studies of this material show that the high-pressure PMN ceramics consist of two phases. One of them exhibits the properties of a dipole-ordering phase with a diffuse transition and another is a relaxor-ferroelectric phase. When annealing, the high-pressure synthesized PMN ceramics acquire the features of classical relaxor PMNs. The effect of high-pressure processing on cation ordering/displacements and thereby on dielectric properties is discussed.

palavras-chave

LEAD MAGNESIUM NIOBATE; FERROELECTRICS; BEHAVIOR; PB(MG1/3NB2/3)O3; PERMITTIVITY; ORDER

categoria

Physics

autores

Olekhnovich, NM; Vyshatko, NP; Radyush, YV; Salak, AN; Ferreira, VM

nossos autores

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