High curie temperature BiFeO3–PbTiO3–Bi(Zn1/2Ti1/2)O3–PbZrO3 piezoceramics with good thermal stability

Ning, Haixia; Hou, Xianbo

doi:10.1007/s10854-014-2594-7

Cited by 1 publication

(2 citation statements)

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“…At a low sintering temperature (1150°C), some pores can be detected easily, giving rise to their poor density. With the sintering temperature increased above 1175°C, the grain boundary became indistinct gradually, and their cross-section was characterized by intergranular fracture [27]. In the whole temperature range, the ceramics presented relative compact microstructure, especially when compared with these prepared by solid state reaction and hydrothermal synthesis without Pb excess.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 6c, e showed the cross-section of samples prepared with 20 and 80 mol% excess, respectively. It's seen that their morphologies changed to intergranular fracture, and the grain boundary was difficult to be recognized [27]. From these results, it's revealed that Pb deficiency in PZT powders may degrade their sintering activity and a higher temperature was required to obtain compact microstructures.…”

Section: Resultsmentioning

confidence: 99%

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Improved sintering activity and piezoelectric properties of PZT ceramics from hydrothermally synthesized powders with Pb excess

Kan

Zhu

et al. 2016

J Mater Sci: Mater Electron

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In this work, Pb(Zr, Ti)O 3 (PZT) powders were prepared by traditional hydrothermal method and solid state reaction. Subsequently, PZT ceramics were sintered and their electric properties (including piezoelectric coefficient d 33 , electromechanical coupling coefficient k p and mechanical quality factor Q m ) as a function of sintering temperature (1125-1250°C) were comparably studied. Given that the Pb deficiency may exist in the hydrothermally synthesized PZT powders, effects of Pb excess (0, 20 and 80 mol%) in the hydrothermal precursor on their sinterability were also involved. The hydrothermally synthesized PZT powders with 80 mol% Pb excess showed the highest sintering activity, and their electric properties peaked at 1175°C (d 33 = 225 pC/N, k p = 0.446, Q m = 300). It's demonstrated that A-site deficiency may degrade the sintering activity of PZT powders, and hydrothermal synthesis of PZT powders with appropriate Pb excess was the compromising pathway to increase their sinterability, decrease the sintering temperature and lessen the volatilization of Pb ion in the fabrication of widely applied PZT ceramic.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%