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EN
The internal friction (Q-1) in multiple-components ceramics PZT type was measured as a function of temperature from 300 to 600 K. An internal friction peak (P2) appears a few dozen degrees below Curie temperature (TC). The P2 peak of internal friction is found to be associated with the viscous-elastic mobility of domain walls. The internal friction due to the viscous-elastic mobility of domain walls was calculated and compared with the experimental data.
EN
The mechanical loss (Q-1) and Young’s modulus (E) were measured as a function of temperature in the range 293K less than T less than 750K on rectangular bar samples of ferroelectric PbZr1-xTixO3 ceramics. There are two mechanical loss peaks, which are located below the phase transition point in coarse grained samples and they seem to be associated with the motion of domain walls. One of these peaks are not observed in fine grained undoped ceramics. The use of dopants such as Ge, Bi, Nb produces an attenuation of mechanical loss, a smoothing of elastic modulus anomalies, and a shifting of the phase transition temperatures.
EN
The aim of the present study is twofold: to measure temperature dependences of internal friction Q-1=f(T) and study the P2peak associated with the viscous-elastic mobility of domain walls. The internal friction due to the viscous-elastic mobility of domain walls was calculated and compared with the experimental data in the reference to the Wang's theory.
EN
The mechanical loss (Q-1) and Young's modulus (E) were measured as a function of temperature in the range 293K
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