Enhanced Curie temperature with a significant reduction in sintering temperature for Cu2+/Bi3+co-doped BCZT lead-free ceramics

被引：2
作者：
Kumari, Sapna [1 ,2 ]
Kumar, Amit [1 ,2 ]
Kumar, V. [2 ]
Aggarwala, Sanjeev [1 ]
Goyal, P. K. [3 ]
Gaurd, Anurag [4 ]
Arya, Anil [1 ]
Kumar, Ashok [5 ]
机构：
[1] Kurukshetra Univ, Dept Phys, Kurukshetra 136119, Haryana, India
[2] Kurukshetra Univ, Inst Integrated & Honors Studies IIHS, Dept Phys, Kurukshetra 136119, India
[3] JC Bose Univ Sci & Technol, Dept Phys, YMCA, Faridabad 121006, India
[4] Univ Delhi, Netaji Subhas Inst Technol, Dept Phys, New Delhi 110078, India
[5] CSIR, Natl Phys Lab, New Delhi 110012, India
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2023年 / 293卷
关键词：
Lead-free ceramics; Sintering temperature; Microstructure; Dielectric properties; Grain size; ELECTRICAL-PROPERTIES; PIEZOELECTRIC PROPERTIES; PHASE-TRANSITION; GRAIN-SIZE; FERROELECTRIC PROPERTIES; DIELECTRIC-PROPERTIES; MULTIFERROIC PROPERTIES; FUNCTIONAL-PROPERTIES; MICROSTRUCTURE; STABILITY;
D O I：
10.1016/j.mseb.2023.116500
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The sintering behavior and functional properties of Ba0.95Bi0.02Ca0.02Zr0.02Ti0.976Cu0.008O3 (Abb. as BCZTCB) lead-free ceramics have been studied through appropriate techniques. The XRD technique reveals a perovskite phase with a pure tetragonal symmetry for samples sintered at 1260 degrees C & 1300 degrees C. However, it is observed to be an admixture of Tetragonal and Orthorhombic phases for samples sintered beyond 1300 degrees C. Microstructural evaluation evidences numerous pores for samples sintered at 1260 degrees C, while the microstructure appears very dense with fewer pores for sintering at 1340 degrees C. The co-doping of Cu2+/Bi3+ results in a significant reduction in sintering temperature along with an enhanced Curie temperature (TC) and improved temperature stability. The enhanced electrical properties obtained for sample sintered at 1340 degrees C are as follows: TC - 153 degrees C, & epsilon;max - 3276, tan & delta; - 2%, the degree of diffuseness (& gamma;) - 1.44, Remnant Polarization (Pr) = 10.8 & mu;C/cm2, Corrosive field (EC) = 11.2 kV/cm, and piezoelectric coefficient (d33) - 114 pC/N.
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页数：13
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