Abstract
In this work, 0.15Pb(Er1/2Nb1/2)O3–0.63Pb(Zn1/3Nb2/3)O3–0.22PbTiO3 (15PEN–63PZN–22PT) single crystals with a pure perovskite structure are obtained through the flux method. The phase structure, dielectric, ferroelectric properties and upconversion photoluminescence of the crystals are studied. The ternary crystals along the [110] orientation have a high Curie temperature (Tc = 250 °C) and large coercive field (Ec = 11.0597 kV/cm) which are higher than those of crystals reported previously. Furthermore, the PEN–PZN–PT crystals are produced with a strong green light excited by a 980 nm laser. Being in the range 298–478 K, the emission intensity of all peaks decreases with increase in temperature. The absolute quantum yield (QY) for the crystals is 0.00059%. These excellent properties provide new possibilities for multifunctional materials of optoelectronic devices.
Highlights
In recent years, due to their remarkable piezoelectricity and dielectricity, relaxor ferroelectric materials have been widely investigated [1,2,3,4,5]
To meet the needs of high power and high temperature application, the coercive field and the Curie temperature of PZN–PT-based crystals have been increased to some extent by forming ternary solid solution systems such as Pb(Ni1/3 Nb2/3 )O3 –Pb(Zn1/3 Nb2/3 )O3 –PbTiO3 (PNN–PZN–PT) [15,16], Pb(In1/2 Nb1/2 )O3 –Pb(Zn1/3 Nb2/3 )O3 –PbTiO3 (PIN–PZN–PT) [17], Pb(Lu1/2 Nb1/2 )O3 -Pb(Zn1/3 Nb2/3 )O3 –PbTiO3 (PLN–PZN–PT)
The composition of 15PEN–63PZN–22PT crystals is determined by the linear rule, with the linear rule being that in a ternary system, the two components near the morphotropic phase boundary (MPB) in PZN–9PT and Pb(Er1/2 Nb1/2 )O3 (PEN)–50PT
Summary
Due to their remarkable piezoelectricity and dielectricity, relaxor ferroelectric materials have been widely investigated [1,2,3,4,5]. Pb(Zn1/3 Nb2/3 )O3 –xPbTiO3 (PZN–xPT) ferroelectric crystals with a composition near the morphotropic phase boundary (MPB) show a prominent piezoelectricity of d33 = 2000–2500 pC/N and electromechanical coupling factors of k33 = 90%–92% [6,7,8,9]. These remarkable electric performances make PZN–9PT single crystals a promising candidate for electromechanical devices, including underwater sonar, sensors, and medical imaging, etc. To meet the needs of high power and high temperature application, the coercive field and the Curie temperature of PZN–PT-based crystals have been increased to some extent by forming ternary solid solution systems such as Pb(Ni1/3 Nb2/3 )O3 –Pb(Zn1/3 Nb2/3 )O3 –PbTiO3
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