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Crystals 2017, 7(5), 130; doi:10.3390/cryst7050130

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

1
College of Materials Science and Engineering and Shenzhen Key Laboratory of Special Functional Materials, Shenzhen University, Shenzhen 518060, China
2
College of Optoelectronic Engineering and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China
3
Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
4
Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
*
Author to whom correspondence should be addressed.
Academic Editor: Stevin Snellius Pramana
Received: 27 March 2017 / Revised: 30 April 2017 / Accepted: 1 May 2017 / Published: 8 May 2017
(This article belongs to the Special Issue Crystal Structure of Electroceramics)
View Full-Text   |   Download PDF [3146 KB, uploaded 8 May 2017]   |  

Abstract

Piezoelectric properties are of significant importance to medical ultrasound, actuators, sensors, and countless other device applications. The mechanism of piezoelectric properties can be deeply understood in light of structure evolutions. In this paper, we report a diagram of the structure evolutions of Pb(Zn1/3Nb2/3)0.91Ti0.09O3 (PZN-9PT) crystals with excellent piezoelectric properties among orthorhombic, tetragonal, and cubic phases, with a temperature increasing from room temperature to 220 °C. Through fitting the temperature-dependent 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 spectra show that the phase transitions of PZN-9PT are a typical continuous evolution process. Additionally, resonance and anti-resonance spectra show the excellent piezoelectric properties of these crystals, which probably originate from the nano twin domains, as demonstrated by TEM images. Of particular attention is that the thickness electromechanical coupling factor kt is up to 72%. View Full-Text
Keywords: Pb(Zn1/3Nb2/3) O3-9%PbTiO3; relaxor ferroelectric crystals; structure phase transition; electromechanical coupling factor Pb(Zn1/3Nb2/3) O3-9%PbTiO3; relaxor ferroelectric crystals; structure phase transition; electromechanical coupling factor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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.

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