Piezoelectric materials, which convert mechanical energy into electrical signals, are widely used in various industrial applications such as sensors, actuators, and energy harvesting devices. This study aims to enhance the performance of Pb(Mg1/3Nb2/3)O3-Pb(Al1/2Nb1/2)O3-Pb(Zr0.52Ti0.48)O₃ (PMN-PAN-PZT) piezoelectric ceramics by investigating the effects of varying PAN and PMN content and adding Nb₂O₅ on their piezoelectric properties. The results show that with 2 mol% of PMN and PAN, the morphotropic phase boundary (MPB) region exhibits the highest piezoelectric properties. Additionally, excess Nb₂O₅ positively influenced the piezoelectric properties, maximizing electro-mechanical coupling factor (kp=63%, d33=440 pC/N). These findings contribute to developing next-generation high-performance piezoelectric materials, with potential for improved efficiency and performance in various industries.
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With the recent active development of laser-based weapons/monitoring/communication systems, there is a significant increase in the demand for improved performance of piezoelectric actuators, a key component of both deformable mirror (DM) and fast steering mirror (FSM) in the systems. The conventional polycrystalline piezoelectric ceramic actuators have limitations in improving their characteristics, so the ultrahigh strain PMN-PZT piezoelectric single crystal multilayer actuators have been developed. In this study, the basic experimental methods were developed to evaluate their stability as well as reliability. The limitations of deformation and applied voltage were confirmed through the breakdown voltage test, and the degree of stability was confirmed through the hammering test. In this study, the breakdown voltage test and the hammering test were confirmed to be effective methods to evaluate their stability as well as reliability. Through these studies, the next-generation PMN-PZT piezoelectric single-crystal multilayer actuator is expected to be applied to various piezoelectric application fields by securing reliability as well as excellent piezoelectric properties.
Mn-doped Pb(In1/2Nb1/2)O3-Pb(Mg2/3Nb1/3)O3-PbTiO3 (Mn:PIN-PMN-PT) single crystals, which exhibit improved phase transition temperatures and coercive field properties compared to Pb(In1/2 Nb1/2)O3-Pb(Mg2/3Nb1/3)O3-PbTiO3 (PIN-PMNPT) single crystals, are expected to be utilized in high-power acoustic transducers. Bridgeman method, growing single crystals along the axial direction from melt, is most widely used method for single crystal growth with large size and high quality. However, single crystal boules grown by the Bridgeman method demonstrate a PT compositional variation, giving rise a distribution of crystal structure and material properties along the growing axis. To employ piezoelectric single crystals grown by the Bridgeman method for acoustic transducers, it is essential to investigate their overall property distribution. In this study, the compositional distribution and property variation of Mn:PIN-PMN-PT single crystals grown by the Bridgeman method was investigated. Measured compositional distribution of PT was from 29% to 32.5% in the Rhombohedral crystal region of the boule. Two types of specimen, [011]-poled Mn:PIN-PMN-29PT and Mn:PIN-PMN-32PT single crystals, were fabricated and tested to obtain full property variation at both ends of the Rhombohedral crystal region. The properties related to the 32 directional vibration mode and the properties related to high-power driving were measured to confirm the overall distribution of properties by composition.
Multilayered actuators using Pb(Mg1/3Nb2/3)O3-Pb(In1/2Nb1/2)O3-PbTiO3 (PMN-PIN-PT) crystals have demonstrated excellent properties, but are costly and lack mechanical strength. Textured PMN-PIN-PT ceramics exhibit robust mechanical strength and comparable properties to their single crystals form. However, the development of multilayered actuators using textured PMN-PIN-PT ceramics has not been achieved until now. This study presents the development of a multilayered actuator using textured 0.37PMN-0.29PIN-0.34PT ceramics with an Ag0.9/Pd0.1 inner electrode, co-fired at 950℃. A random 0.37PMN- 0.29PIN-0.34PT ceramics multilayered actuator was also developed for comparison. The multilayered actuator consisted of 9 ceramic layers (36 μm thickness) with an overall actuator thickness of 0.401 mm. The textured and random 0.37PMN-0.29PIN- 0.34PT ceramics-based multilayered actuators achieved displacements of 0.61 μm (0.15% strain) and 0.23 μm (0.057% strain) at a low applied peak voltage of 100 V. These results suggest that the developed multilayered actuator using high-performance textured 0.37PMN-0.29PIN-0.34PT ceramics has the potential to replace expensive single crystal-based actuators costeffectively.
[011] poled ternary Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PMN-PT) single crystals have been investigated for active materials for acoustic transducers because of their high piezoelectric properties in both shear and transverse modes. In order to use [011] poled PIN-PMN-PT single crystals for acoustic transducers, the characterization of full-matrix material properties is required. In this study, full sets of compliance, dielectric, and piezoelectric constants of [011] poled rhombohedral PIN-PMN-PT were measured by a resonance method. Dimensions and geometries of 12 samples were proposed for measuring 17 independent material constants of [011] poled rhombohedral PIN-PMN-PT single crystals. Two sets of samples with different PT concentrations, 0.24PIN-0.49PMN-0.27PT and 0.24PIN-0.46PMN-0.30PT, were fabricated and their material properties were measured. Measured impedance spectra and simulated impedance spectra of the samples were compared to check the accuracy of the measurements.
Pb(Mn1/3Nb2/3)0.07(Ni1/3Nb2/3)0.10(Zr0.5Ti0.5)0.83O3 composition ceramics with high piezoelectric properties were fabricated by the columbite precursor method for ultrasonic generators, and the effects of sintering temperature on microstructure and piezoelectric properties were systematically investigated. It was found that the tetragonality of the ceramics decreased with increase in sintering temperature. Moreover, excellent physical properties such as d33=447 pC/N, εr=1,843, kp=0.641, and Qm=1,207 were obtained for an ultrasonic generator when the second calcination temperature and sintering temperature were 720℃ and 920℃, respectively.
In this paper, Pb(Mn1/3Nb2/3)0.07(Ni1/3Nb2/3)0.10(Zr0.5Ti0.5)0.83O3 ceramics were fabricated by the conventional solid state method to obtain excellent dielectric properties for ultrasonic generators. The effects of 2nd calcination temperature on their microstructure and piezoelectric properties were systematically investigated. The tetragonality increased in the ceramics when 2nd calcination temperature increased to the optimized temperature at 750℃. At that temperature, excellent physical properties (d33= 352 pC/N, εr= 1,687, kp= 0.570, Qm= 1,640) were obtained for ultrasonic generator application.
Convectional PZT based piezoelectric ceramics have to sinter at high temperature about 1,200℃ for their suitable electrical properties. However, some issues: low temperature sintering piezoelectric ceramic composition and reliable internal electrode, have recently attracted a great deal of interest as a highly efficient multi-layered piezoelectric ceramics. In order to optimize low temperature sintering conditions of thick-film PMN-PZ-PT ceramic, it was investigated sintering and piezoelectric properties according to the change of LiBiO2contents. Thus, the superior piezoelectric properties were found at the pallet type PMN-PZ-PT optimized with low sintering processing at 925℃ including 7 wt% LiBiO2sintering aid. Consequentially, we successfully manufactured thick-film PMN-PZ-PT ceramics, which had superior piezoelectric and dielectric properties, with 5 wt% of LiBiO2sintering aid at temperature of 900℃.
In this paper, the growing orientation of PMN-PT single crystal is analyzed using the Laue-Back Reflection Method. Two kinds of PMN-PT single crystals are grown using the Bridgman growing method in the [001] and [111] directions and their the Laue photographs are simulated assuming cubic crystal systems. From the comparison between simulation and test results, it can be concluded that the single crystals are grown in the desired crystal orientations.
Two-Stage De-binding for Cu Electrode Application to PZT-PZNN Multilayer Actuator Sung Cheul Hong, Zeehoon Park, Dong-Hun Yeo, Hyo-Soon Shin, Sahn Nahm Transactions on Electrical and Electronic Materials.2022; 23(4): 348. CrossRef
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