Preprint Article Version 1 This version is not peer-reviewed

A Diagram of Structure Evolution of Pb(Zn1/3Nb2/3) O3-9%PbTiO3 Relaxor Ferroelectric Crystals with Excellent Piezoelectric Properties

Version 1 : Received: 30 April 2017 / Approved: 1 May 2017 / Online: 1 May 2017 (10:35:10 CEST)

A peer-reviewed article of this Preprint also exists.

Zhou, H.; Li, T.; Zhang, N.; Mai, M.; Ye, M.; Lin, P.; Huang, C.; Zeng, X.; Huang, H.; Ke, S. A Diagram of the Structure Evolution of Pb(Zn1/3Nb2/3) O3-9%PbTiO3 Relaxor Ferroelectric Crystals with Excellent Piezoelectric Properties. Crystals 2017, 7, 130. Zhou, H.; Li, T.; Zhang, N.; Mai, M.; Ye, M.; Lin, P.; Huang, C.; Zeng, X.; Huang, H.; Ke, S. A Diagram of the Structure Evolution of Pb(Zn1/3Nb2/3) O3-9%PbTiO3 Relaxor Ferroelectric Crystals with Excellent Piezoelectric Properties. Crystals 2017, 7, 130.

Journal reference: Crystals 2017, 7, 130
DOI: 10.3390/cryst7050130

Abstract

Piezoelectric properties are of significant importance to medical ultrasound, actuators, sensor, and countless other device applications. The mechanism of piezoelectric properties can be deeply understood from structure evolutions. In this paper, we report a diagram of structure evolutions of the Pb(Zn1/3Nb2/3)0.91Ti0.09O3 (PZN-9PT) single crystal with excellent piezoelectric properties among the orthorhombic, tetragonal, and cubic phases with temperature increasing from room temperature to 220 C. Through fitting the temperature dependence XRD curves with Gauss and Lorenz functions, we obtained the evolutions of the content ratio of three kinds of phases (orthorhombic, tetragonal and cubic) and the lattice parameters of the PZN-9PT system with the changes of temperature. The XRD fitting results together with Raman and dielectric spectrums show that the phase transitions of PZN-9PT are a typical continuous evolution process, very similar to the phase transition of paraffin from solid to liquid. Additionally, resonance and anti-resonance spectrum show excellent piezoelectric properties of the crystals, which probably originate from the nano twin domains, as demonstrated by the TEM images. Of particular attention is that the thickness electromechanical coupling factor kt is up to 72%.

Subject Areas

Pb(Zn1/3Nb2/3) O3-9%PbTiO3; relaxor ferroelectric crystals; structure phase transition; electromechanical coupling factor

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