High-Performance Piezoelectric Characteristics of Sm Substituted Pb(Ni,Nb)O3-Pb(Zr,Ti)O3-Pb(Mg,W)O3 System Ceramics for Ultrasonic Transducer Application

Abstract

In this paper, in order to develop composition ceramics for an acoustic emission sensor application for nondestructive testing, Pb(Ni,Nb2/3)O3-Pb(Zr,Ti)O3-Pb(Mg,W)O3 [PNN-PZT-PMW] system ceramics were manufactured by conventional mixed oxide method using Li2CO3 and CaCO3 as sintering aids. Their microstructural, dielectric and piezoelectric properties were also investigated. At x = 0.0075 Sm, the substituted specimen sintered at 980 (°C), and high values of piezoelectric properties appeared: the dielectric constant (εr) of 2824, piezoelectric coefficient d33 of 630 [pC/N], planar electromechanical coupling factor kp of 0.665, piezoelectric voltage constant g33 of 25.2 [mV.m/N], and high Curie temperature (Tc) = 270 (°C), respectively. These values were applicable for devices such as acoustic emission sensor and ultrasonic transducer.

Electrical Properties of the Ultrasonic Transducer Device Using PbTiO3 system ceramics for Temporomandibular Joint Disorder Pain Relief and Facial Skin Massage

“…The ultrasonic energy is very effective in enhancing micro-circulation and improving the metabolism by increasing the tissue temperature through the generation of its thermal energy. And ultrasonic energy can be delivered to the subcutaneous fat cells to break down the fat's cells, and this means that the amount of subcutaneous fats will be reduced through the excretion of people [26]. Accordingly, various kinds of ultrasonic transducers can be used as the piezoelectric device mounted with ultrasonic physical therapy machine and facial massage.…”

“…For investigating the dielectric properties, capacitance was measured at 1kHz using an LCR meter (ANDO AG-4034) and dielectric constant was calculated. For investigating the piezoelectric properties, the resonant and anti-resonant frequencies were measured by an Impedance Analyzer (Agilent 4294A) according to IRE standard [26]and then the electromechanical coupling factor and mechanical quality factor were calculated. Dynamic range (D.R.)…”

“…However, PbTiO3-based ceramics have a high Curie temperature due to the large anisotropy of the electromechanical coupling coefficient, and the cracks occur when the Curie temperature falls, making it difficult to sinter. To alleviate the anisotropy, the substituent La 3+ and Sm 3+ ions can be substituted for the Pb 2+ site , taking into consideration ion radius [25].To decrease the sintering temperature of PNN-PMN-PZT, PMW-PNN-PZT and PNN-PZT ceramics, sintering aids such as CuO, CaCO3, PbO, Sb2O5and Li2CO3 can be added to the main compositions [21][22][23][24][25][26].…”

Piezoelectric Materials Design for High-Performance Sensing

“…The phase structure engineering of piezoelectric materials, including the morphotropic phase boundary (MPB) of piezoelectric ceramics and the active phase of piezoelectric polymers, is an effective way to modulate piezoelectric properties [3]. With regard to preparation and performance tuning, Kang et al [4] developed composition ceramics of Pb(Ni,Nb 2/3 )O 3 -Pb(Zr,Ti)O 3 -Pb(Mg,W)O 3 [PNN-PZT-PMW] to prepare acoustic emission sensors for nondestructive testing. The PNN-PZT-PMW was manufactured via a conventional mixed-oxide method, using Li 2 CO 3 and CaCO 3 as sintering aids.…”