Article
Chemistry, Physical
Yu Chen, Huajiang Zhou, Qingyuan Wang, Jianguo Zhu
Summary: In this study, different amounts of Cr2O3 were doped into the Aurivillius-type compound Bi2.8Gd0.2TiNbO9 (BGTN) to synthesize Gd/Cr co-doped Bi3TiNbO9 ceramics with improved electrical properties. The dopant of Cr2O3 resulted in lattice distortion and grain refinement, and had an impact on the dielectric response and conductivity of the ceramics. Moderate Cr2O3 doping was found to enhance the piezoelectric properties and thermal stability of the ceramics.
JOURNAL OF MATERIOMICS
(2022)
Article
Engineering, Electrical & Electronic
Yohandys A. Zulueta, Y. Leyet, F. Guerrero, J. Angada-Rivera, Minh Tho Nguyen, My-Phuong Pham-Ho
Summary: A new method, the complex impedance formalism, is introduced to study the relaxation process of conducting materials. This method can approach the relaxation process in both frequency and time domains for non-Debye relaxation type. It is tested by analyzing the relaxation process of solid BaTiO3 material at high temperatures. The combination of complex impedance and dielectric modulus formalism provides a better understanding of individual relaxation regions.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Lisham Paris Chanu, Sumitra Phanjoubam
Summary: Rare earth manganite YMnO3 and YMn0.9Cr0.06Fe0.04O3 with co-substituted transition metal ions at Mn-sites were synthesized via sol-gel auto combustion route. The effect of Cr3+ and Fe3+ co-substitution on the structural and electrical properties of YMnO3 was investigated. Structural and morphological analysis confirmed the improvement in dielectric properties of the substituted sample.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Renfen Zeng, Fen Ye, Xiangping Jiang, Chao Chen, Xiaokun Huang, Xin Nie
Summary: The microstructure and properties of Ce-doped BTTW-BITT ceramics were analyzed, and it was found that an appropriate amount of Ce ion doping could improve the performance, enhance the piezoelectric activity, and improve the thermal stability.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
S. J. Sondarva, D. V. Shah
Summary: This study synthesized polycrystalline Mn3-xCrxTeO6 (MCTO) compounds using the SSR method and investigated the non-Debye relaxation mechanism and correlated barrier hopping mechanism in Cr-doped MCTO compounds, laying the foundation for their applications in the field of multiferroics.
SOLID STATE SCIENCES
(2022)
Article
Chemistry, Physical
S. J. Sondarva, D. Shah
Summary: In this study, the complex oxide Mn3TeO6 (MTO) compound was synthesized using solid-state reaction method at high processing temperature. The material was characterized in terms of structure, morphology, and electrical properties. The dielectric constant and conductivity of the compound were found to increase with temperature, indicating a correlated barrier hopping mechanism responsible for conduction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Yohandys A. Zulueta, Minh Tho Nguyen, My Phuong Pham-Ho
Summary: The relaxation processes of Ba1-xCaxTiO3 ceramics with different Ca contents were studied using dielectric modulus and complex impedance experiments. Both methods provided insights into relaxation processes in both the time and frequency domains. The complex impedance formalism revealed a Cole-Cole type relaxation function, while the dielectric modulus formalism described non-Debye relaxation functions. The activation energies derived from these methods differed, with the dielectric modulus formalism indicating doubly-ionized oxygen vacancies and the complex impedance approach suggesting electronic conduction. The study also demonstrated the effectiveness of using both impedance and dielectric modulus formalisms to analyze non-Debye relaxation processes and conductive properties in mixed electronic-ionic conductors.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Ceramics
Pu Mao, Jiping Wang, Peng Xiao, Lixue Zhang, Fang Kang, Hao Gong
Summary: This study developed a novel system of isovalent Zr4+ and donor Nb5+ co-doped CaCu3Ti4O12 (CCTO) ceramics to enhance dielectric response. The co-doping of Zr4+ and Nb5+ ions significantly reduced grain size and improved dielectric constant, leading to giant dielectric response within broader frequency and temperature ranges. The enhanced dielectric response is primarily attributed to the complex defect dipoles associated with oxygen vacancies by co-doping Zr4+ and Nb5+ ions into CCTO structure.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Chao Cheng, Wenjun Cao, Shouguo Huang, Youmin Guo, Yi Yu, Dongping Qiao, Chunchang Wang
Summary: The dielectric properties of MgO single crystal were studied at different temperatures, revealing two oxygen-vacancy-related phase transitions and explaining their effects on resistance and dielectric relaxation.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Ceramics
Ghulam Mustafa, Muhammad Khalid, Ali Dad Chandio, Kiran Shahzadi, Zaheer Uddin, Junaid Kareem Khan, Naimat Ullah Channa, Zaheer Abbas Gilani, H. M. Noor ul Huda Khan Asghar
Summary: A series of lanthanum-doped nickel ferrites were synthesized and their dielectric properties were studied. The results showed that the La doping induced lattice strain and affected the lattice constant, resulting in changes in dielectric loss and dielectric constant. The materials exhibited the most stable dielectric properties at high frequencies, making them potential candidates for microwave devices.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
S. Grace Infantiya, A. Aslinjensipriya, R. Sylvia Reena, K. Joseph Pious, Periyasamy Sivakumar, C. Justin Raj, S. Jerome Das
Summary: In this study, Zn and Mn co-substituted perovskite ceramics were fabricated using the sol-gel technique and their structural, morphological, dielectric, and electrical conductivity properties were examined. The results showed that the incorporation of Zn and Mn ions improved the temperature stability and dielectric properties of the ceramics, which exhibited semiconducting behavior.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Applied
Tianyang Liu, Xiaofei Wang, Congcong Li, Bowen Shen, Mingyan Yao, Xinyang Pei, Yahui Yang, Yanglei Ou, Zhaofei Zhu, Liben Li
Summary: SLTO ceramics with giant dielectric constant were prepared by the traditional solid-state method and the temperature-dependent dielectric constant was studied. Two sets of relaxation peaks were observed at different temperature ranges, corresponding to relaxation processes related to oxygen vacancy migration and Sr or Ti defects at different frequencies.
MODERN PHYSICS LETTERS B
(2021)
Article
Engineering, Electrical & Electronic
K. Iben Nassar, M. Slimi, N. Rammeh, S. Soreto Teixeira, M. P. F. Graca
Summary: In this paper, impedance spectroscopy, modulus analysis, AC electrical conductivity, and dielectric properties of the double perovskite compound SrAgNiMnO6 have been studied. The material exhibits semiconductor characteristics and shows relaxation phenomena in its dielectric properties. These findings suggest that this compound has important electrical and dielectric properties for potential technological applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Multidisciplinary Sciences
Jannatul Ferdaus, Mithun Kumar Das, Anamika Dey, Bablu Chandra Das, F. Alam, Mashudur Rahaman, Md Azizul Hoque, Muhammad Shahriar Bashar
Summary: In this study, polycrystalline Li0.15Ni0.6-xZnxCu0.1Fe2.15O4 ferrites were prepared using a conventional solid-state reaction method. The addition of Zn increased the lattice parameter and densities, leading to improvements in the real part of initial permeability and relative quality factor. The replacement of Ni with Zn also resulted in lower loss factor and improved magnetic properties.
Article
Materials Science, Multidisciplinary
Songlin Pu, Pinyang Fang, Li Xu, Feifei Guo, Zengzhe Xi
Summary: The dielectric relaxation behavior and conductivity of Sr1-x(LiCe)(x/2.5)Bi2Nb2O9 ceramics prepared by conventional solid-sate reaction method were investigated. The introduction of (LiCe) significantly improved the conductivity, and a large conductivity at high temperature (approximately 10-4 S·cm(-1) at 530 degrees C) could be achieved. A phase transition from normal ferroelectric to relaxor-like ferroelectric was observed in the Sr1-x(LiCe)(x/2.5)Bi2Nb2O9 ceramics. Complex impedance analysis results indicated that the concentration of charge carriers gradually increased with the increase in (LiCe). Activation energy calculations confirmed that oxygen vacancies were responsible for the conductivity at high temperature. The dielectric relaxation behavior at high temperature was attributed to the short-range conductivity of oxygen vacancies under thermal stimulation.
MATERIALS RESEARCH BULLETIN
(2023)
