The Strain Response of Lead Zinc Niobate-Lead Titanate Piezocrystals: Phase Transitions and Non-Linear Effects

Autor:	S. F. Liu, W. Ren, B. K. Mukherjee
Rok vydání:	2005
Předmět:	Permittivity Phase transition Materials science Condensed matter physics Dielectric Condensed Matter Physics Piezoelectricity Titanate Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Electric field Phase (matter) Lead titanate
Zdroj:	Ferroelectrics. 326:11-18
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150190500318099
Popis:	Single crystals of Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 (PZN-PT) produce high levels of strains with large electromechanical coupling coefficients and they exhibit high dielectric permittivity. These properties make PZN-PT single crystals promising materials for transducer and actuator applications. The large strains in these materials are partly due to electric-field-induced rhombohedral–tetragonal phase transitions that are temperature dependent. We have studied the phase transitions in ⟨001⟩ oriented Pb(Zn 1/3 Nb 2/3 )O 3 -xPbTiO 3 single crystals for x = 4.5% and x = 8% by measuring the piezoelectric strains of the crystals as a function of applied electric field and temperature. We have used laser Doppler interferometry to make direct measurements of the strain responses of the two types of ⟨001⟩ and ⟨111⟩ oriented PZN-PT single crystals in the rhombohedral phase as a function of AC electric fields and DC bias fields. When the applied electric field exceeds a threshold value, the dielectric and piezoelectr...
Databáze:	OpenAIRE
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