ZnTa2O6-holistic insights into a potential high-temperature piezoelectric candidate with tri-α-PbO2 structure

被引：3
作者：
Mitra, Rahul [1 ,2 ]
Ramadoss, Ananthakumar [3 ]
Anwar, Shahid [1 ,2 ]
Manju, Unnikrishnan [1 ,2 ]
机构：
[1] CSIR Inst Minerals & Mat Technol, Mat Chem Dept, Bhubaneswar 751013, India
[2] Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, India
[3] Cent Inst Petrochem Engn & Technol CIPET, Sch Adv Res Petrochem, Lab Adv Res Polymer Mat LARPM, Bhubaneswar 751024, India
来源：
MATERIALS RESEARCH BULLETIN | 2023年 / 157卷
关键词：
tri-?-PbO2 structure; Transition metal tantalates; Far-IR modes; Piezoelectric charge coefficient; Dielectric constant; MICROWAVE DIELECTRIC-PROPERTIES; ZNTA2O6; CERAMICS; PHOTOLUMINESCENCE; MICROSTRUCTURE; SINGLET; HEAT;
D O I：
10.1016/j.materresbull.2022.112038
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have comprehensively investigated the structural, morphological, vibrational, thermal, and surface charge properties of ZnTa2O6 (ZTO) system, which is predicted to be a novel, lead-free, high-temperature piezoelectric candidate. Single-phase polycrystalline samples were formed having orthorhombic Pbcn symmetry with the tri-alpha-PbO2 structure. ZTO was highly Raman active, expressing higher electronically excited states of even parity and with the presence of far-IR modes. The crystallization of ZTO was observed at-691 degrees C with a melting enthalpy, Delta Hm =-301.7 J/g. Force-driven dielectric constant (epsilon r) was found to be 7.05 with an ultra-low loss tangent value of 1 x 10-4 at 0.45 N dynamic force. Energy storage efficiency of 43% at 5 kV/cm and a piezo-electric charge coefficient (d33) value of 20 pC/N were obtained. The confluence of all these properties makes ZTO a novel piezoelectric material with high-temperature stability whilst further evoking applications in energy harvesting, electronics, memory storage, and electromechanical systems.
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页数：10
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