Probing the dielectric behavior of lead-free BCST ceramic composite: An impedance spectroscopic approach

2021 ◽  
Author(s):  
Chitra ◽  
Nutan Tripathy ◽  
K. Chandramani Singh
Keyword(s):  
Ceramic Composite ◽  
Dielectric Behavior ◽  
Lead Free

Dielectric Behavior of Mechano-chemically Synthesized [(CH3NH3)3Bi2Br9]: A Lead Free Hybrid Perovskite

2021 ◽  
Author(s):  
Swagatalaxmi Pujaru ◽  
Priyabrata Sadhukhan ◽  
Basudev Ghosh ◽  
Arup Dhara ◽  
Sachindranath Das
Keyword(s):  
Impedance Spectroscopy ◽  
Complex Impedance ◽  
Negative Temperature ◽  
Dielectric Behavior ◽  
Lead Free ◽  
Published Data ◽  
Temperature Dependent ◽  
Microstructural Parameters ◽  
Hybrid Perovskite ◽  
Refinement Method

Abstract Lead free hybrid halide perovskite (CH3NH3)3Bi2Br9 has been successfully synthesized by mechano-chemical method. The microstructure analysis by Rietveld’s refinement method revealed that the crystal belongs to trigonal system with space group P3 ̅m1. The obtained microstructural parameters are well in agreement with the previously published data. Temperature-dependent ac conductivity, impedance spectroscopy, and complex dielectric properties have been investigated in detail. The negative temperature coefficient of resistance behaviour reveals the semiconducting nature of the materials. The complex impedance spectroscopy also supports the semiconducting nature of the sample with activation energy for conduction ~0.38 eV.

Technology and Properties of Ferroelectromagnetic Lead–Free BFN–Ferrite Composites

2013 ◽  
Vol 58 (4) ◽  
pp. 1405-1409 ◽  
Author(s):  
D. Bochenek ◽  
P. Niemiec
Keyword(s):  
Magnetic Properties ◽  
Ceramic Composite ◽  
Composite Powder ◽  
Barium Carbonate ◽  
Lead Free ◽  
Relaxation Phenomena ◽  
Lead Free Ceramic ◽  
Calcination Method ◽  
Ferrite Composites

Abstract A lead free ceramic composite 0.9BaFe0:5Nb0:5O3-0.1Ni0:5Zn0:5Fe2O4 (BFN-NZF) with ferroelectromagnetic properties have been obtained in presented work. Ceramic composite powder obtained from the simple oxides Fe2O3, Nb2O5, ZnO, NiO and barium carbonate BaCO3. The composition of the composite was chosen so that the ratio of the BFN and NZF components was 90:10. The synthesis of components of BFN-NZF composite was performed using the calcination method. Final densification of synthesized powder has been done using free sintering. The XRD, the microstructure, EDS and dielectric investigations were performed. For comparison of the BFN ceramic and the BFN-NZF composites, temperature and frequency impedance research was conducted. Relaxation phenomena were observed at temperatures above 235°C in the BFN ceramic and above 150°C in the BFN-NZF composite. Obtained results show the coexistence of ferroelectric and magnetic properties. Such properties of obtained composites give the possibility to use them in magnetoelectric transducers.

Defect chemistry and colossal dielectric behavior of Nd-modified SrTiO3 lead-free ceramic materials

2020 ◽  
Vol 46 (10) ◽  
pp. 16644-16652 ◽  
Author(s):  
Xu Guo ◽  
Yongping Pu ◽  
Wen Wang ◽  
Jiamin Ji ◽  
Jingwei Li ◽  
...  
Keyword(s):  
Ceramic Materials ◽  
Defect Chemistry ◽  
Dielectric Behavior ◽  
Lead Free ◽  
Lead Free Ceramic

Dielectric behavior of a lead-free electroceramics Ba1−xEr2x/3(Ti1−yZry)O3

2018 ◽  
Vol 29 (12) ◽  
pp. 10154-10163
Author(s):  
F. Si-Ahmed ◽  
K. Taïbi ◽  
O. Bidault ◽  
N. Millot
Keyword(s):  
Dielectric Behavior ◽  
Lead Free

Dielectric behavior of La2O3-modified 0.4(Ba0.8Ca0.2)TiO3–0.6Bi(Mg0.5Ti0.5)O3 lead-free ceramics

2016 ◽  
Vol 27 (11) ◽  
pp. 12128-12133 ◽  
Author(s):  
Xiaoqi liu ◽  
Laijun Liu ◽  
Feifei Han ◽  
Saisai Liu ◽  
Huaicheng Xiang ◽  
...  
Keyword(s):  
Dielectric Behavior ◽  
Lead Free ◽  
Lead Free Ceramics

Tailoring of unipolar strain in lead-free piezoelectrics using the ceramic/ceramic composite approach

2014 ◽  
Vol 115 (12) ◽  
pp. 124108 ◽  
Author(s):  
Neamul H. Khansur ◽  
Claudia Groh ◽  
Wook Jo ◽  
Christina Reinhard ◽  
Justin A. Kimpton ◽  
...  
Keyword(s):  
Ceramic Composite ◽  
Lead Free ◽  
Composite Approach
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