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1 Molecular and Quantum Acoustics

1 2003

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Influence of the Chemical Composition on the Physical Properties of Pzt-Type Piezoceramic Transducers.

Surowiak Z., Czekaj D., Fesenko E., Razumovskaya O., Reznichenko L., Zakharchenko I.

Molecular and Quantum Acoustics

2003

Vol. 24

183-209

Result if investigations on influence of lead deficiency on the crystalline structure of PZT-type ceramic piezoelectric materials is presented. The solid solution of (x)PbTiO3-(1-x-y)PbZrO3-(y)SigmaPb(B'1-alfaB"alfa)O3, exhibiting the perovskite-type structure, condtitutes the basis of such materials. The lead deficiency was originated by a thermal treatment. Investigations on influence of lead deficiency on the crystalline structure of PZT-type ceramics have been performed for solid solutions exhibiting the chemical compositions corresponding to the tetragonal or rhombohedral boundary of the morphotropic region (PCR-1, PCR-8: "Piezoelectric Ceramics of Rostov") and to tetragonal phase region compositions (ceramics of Pb(Zr0.39Ti0.59W0.01Cd0.01)O3). It has been found that the deficiency in lead causes a change of the point group or a change of the space group of the perovskite phase crystalline structure of PZT. The solid solutions on the basis of Pb(Zr,Ti)O3 partly resolve themselves into PbTiO3, ZrO2 and (PbO) when the lead deficiency caused by thermal treatment increases.