Article
Materials Science, Multidisciplinary
Thomas Schulz, Vignaswaran Veerapandiyan, Marco Deluca, Joerg Toepfer
Summary: Bulk ceramic samples of the perovskite series were prepared using the conventional solid-state route, with careful characterization of Bi2O3 raw materials being essential. X-ray diffraction analysis revealed the formation of perovskite main phase, and samples with higher CaZrO3 fraction showed a flattening of permittivity-temperature curves along with low dielectric losses.Samples with x = 0.2 exhibited a temperature stable permittivity of epsilon(r) approximate to 600 with small dielectric losses, qualifying them as suitable high temperature capacitor dielectric materials.
MATERIALS RESEARCH BULLETIN
(2022)
Review
Chemistry, Multidisciplinary
Lei Zhang, Yongping Pu, Min Chen
Summary: This paper introduces the potential of impedance spectroscopy (IS) in capacitive energy-storage ceramics, which is limited by complex relaxation-time distributions caused by intrinsic/extrinsic defects. The review summarizes the whole picture based on the response of the electroactive area, revealing the critical role of IS in capacitive energy-storage ceramics. New development directions and prospects for impedance in capacitive energy-storage ceramics are also pointed out.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Materials Science, Ceramics
B. M. G. Melo, D. Blaskova-Kochnitcharova, S. Soreto Teixeira, E. Lefterova, P. Petkov, T. Petkova, L. C. Costa
Summary: Bulk samples of the ternary TiO2-V2O5-P2O5 system were synthesized using the melt-quenching technique. The structure and composition were identified using X-ray diffraction and scanning electron microscopy, with dielectric properties measured using impedance spectroscopy. Analysis of impedance spectra indicated a grain conductivity of 10-1 S/m at 190 degrees Celsius for the NASICON sample.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Hicham Mahfoz Kotb, Hassan A. Khater, Osama Saber, Mohamad M. Ahmad
Summary: NSCTO ceramics were prepared by reactive sintering solid-state reaction, and the influence of sintering temperature on structural and dielectric properties was thoroughly studied. The ceramic sample sintered at 1025 degrees C showed the best compromise between colossal relative permittivity and low dielectric loss values.
Article
Materials Science, Ceramics
Guangtan Miao, Nan Li, Peng Li, Jigong Hao, Wei Li, Juan Du, Weifang Han, Guorong Li, Chunming Wang, Peng Fu
Summary: YCr0.5Mn0.5O3(YCM)-CaCu3Ti4O12(CCTO) ceramics with pure perovskite structures were prepared using a solid processing method. The resistivity of the ceramics was found to be sensitive to grain size and grain size distribution. Additionally, the ceramics exhibited NTC characteristics.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Meshari Alotaibi, Fawaz Almutairi, Anthony R. West
Summary: Yttria-stabilized hafnia ceramics exhibit unique electrical conductivity at high temperature and under applied bias, with reversible switching behavior.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Crystallography
Mohamad M. Ahmad, Hicham Mahfoz Kotb, Celin Joseph, Shalendra Kumar, Adil Alshoaibi
Summary: La2/3Cu3Ti4O12 (LCTO) powder was synthesized using the mechanochemical milling technique and sintered at lower temperatures compared to standard solid-state reactions. The sintered ceramics exhibited a cubic phase structure with increasing grain size at higher sintering temperatures. Impedance results indicated higher grain conductivity compared to grain boundary conductivity, contributing to the giant dielectric constant observed in the samples.
Article
Chemistry, Physical
Bappa Sona Kar, M. N. Goswami, P. C. Jana
Summary: La2O3-substituted polycrystalline 0.56BiFeO(3)-0.44BaTiO(3) ceramics were prepared via conventional solid-state reaction process, with investigations on crystal structure, dielectric, magnetic, and impedance properties. La substitution enhanced the multiferroic nature of the materials, as evidenced by improved energy storage density and remnant magnetization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Zakaria Chchiyai, Fatima El Bachraoui, Youssef Tamraoui, Lahcen Bih, Abdelilah Lahmar, Abdessamad Faik, Jones Alami, Bouchaib Manoun
Summary: The crystal structure, morphological, optical, electrical, and dielectric properties of Ba1-xBixTi1-xMnxO3 polycrystalline perovskites prepared by solid-state reaction were systematically investigated. The samples showed pure perovskite phase with cubic symmetry and irregularly spherical grains with an average size of 2 μm. The synthesized compounds exhibited maximum absorbance in the visible range and semiconductor behavior with increased electrical conductivity upon addition of Bi and Mn ions. The conduction mechanism was attributed to hopping process along ionized oxygen vacancies, and dielectric properties showed an increase in permittivity and loss with increasing temperature.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
S. Devesa, M. P. Graca, L. C. Costa
Summary: The bismuth-based pyrochlore Bi1.34Fe0.66Nb1.34O6.35 was prepared using the sol-gel method and synthesized at low temperature. Analysis showed that the obtained powders have high crystallinity and nanosized grains even with low temperature treatments. Dielectric performance was studied using impedance spectroscopy technique, revealing two temperature-dependent relaxation processes in the prepared samples.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Porntip Siriya, Pairot Moontragoon, Pornjuk Srepusharawoot, Prasit Thongbai
Summary: The effects of sintering temperature and doping level concentration on the microstructures, dielectric response, and electrical properties of W6+-doped TiO2 were investigated. The study found that increasing the doping level concentration led to increased grain size and improved low-temperature dielectric response.
Article
Chemistry, Physical
Jiangtao Fan, Gang He, Zhenzhu Cao, Yongfan Cao, Zhen Long, Zhanggui Hu
Summary: Through the synthesis of a system of acceptor Gd3+ and donor Ta5+ co-doped (Gd0.5Ta0.5)xTi1-xO2 (GTTOx, x = 0, 0.01, 0.02, 0.04, 0.06) ceramics, dielectric response is enhanced. A colossal permittivity (CP, 2.65 x 104@1 kHz, 2.37 x 104@1 MHz), a very low dielectric loss (tano, 0.007@1 kHz, 0.03@1 MHz), good stability of frequency (20-106 Hz) and temperature (RT-250 degrees C, D epsilon 0 (T)/epsilon 030 < +/- 15%, at 1 kHz) were achieved simultaneously in GTTO0.01 ceramic. The main reasons for the improved dielectric properties are the synergistic effect of the electron pinning defect-dipole (EPDD) model, the internal blocking layer capacitance (IBLC) mechanism, and electrode response. This work provides a promising approach for the design of defect-related high-performance giant dielectric ceramics.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Physical
Michal Rerak, Jolanta Makowska, Malgorzata Adamczyk-Habrajska, Lucjan Kozielski
Summary: In this study, the influence of dopant Pr3+ at the Ba2+-site of BaBi2Nb2O9 (BBN) ceramics was observed, leading to a slight decrease in the average size of ceramic grains with an increase in praseodymium content. The ceramic materials obtained exhibit a tetragonal structure and their electrical properties were studied using complex impedance spectroscopy methods.
Article
Chemistry, Physical
D. A. Monteiro, M. M. Costa, R. R. F. Bento
Summary: The BaZrO3 ceramics were synthesized with Bi(Zn1/2Ti1/2)O-3 and sintered to produce lead-free material for environmental concern. XRD analysis confirmed perovskite-type cubic structure for BaZrO3 ceramics with different molar ratios, and the addition of Bi(Zn1/2Ti1/2)O-3 increased the conductivity while SEM confirmed material density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Maqbool Ur Rehman, Abdul Manan, Atta Ullah, Yaseen Iqbal, Murad Ali Khan, Raz Muhammad
Summary: (1-x)BaTiO3-xBi(Mg0.5Ce0.5)O3 (0.00 <= x <= 0.10) ceramics were prepared using solid-state sintering method to investigate their structural, dielectric, impedance, and energy storage properties. Phase analysis revealed a phase transition from tetragonal to pseudo-cubic in compositions with x >= 0.06. Doping BaTiO3 with Bi (Mg0.5Ce0.5)O3 reduced the grain size, resulting in decreased electrical conductivity and increased electrical breakdown strength up to 250 kV cm-1. The composition with x = 0.08 exhibited high energy storage density (-1.84 J cm-3) and recoverable energy density (-1.26 J cm-3), as well as an electrical breakdown strength of 250 kV cm-1. This ceramic is a promising candidate for advanced pulsed power capacitors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Anja Zarah Friedberg, Kent Kammer Hansen
JOURNAL OF ELECTROCERAMICS
(2019)
Article
Electrochemistry
K. Kammer Hansen, R. Sazinas
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2019)
Article
Electrochemistry
Rokas Sazinas, Kjeld Bohm Andersen, Kent Kammer Hansen
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2020)
Article
Chemistry, Physical
K. Kammer Hansen
SOLID STATE IONICS
(2020)
Article
Electrochemistry
K. Kammer Hansen
Article
Electrochemistry
R. M. L. Werchmeister, K. Kammer Hansen
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2020)
Article
Electrochemistry
K. Kammer Hansen, L. Deleebeeck, V. Gil
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2020)
Article
Materials Science, Ceramics
Jierong Liang, Rokas Sazinas, Kent Kammer Hansen
Summary: A new series of cobalt-based perovskite cathodes for intermediate temperature solid oxide fuel cells were studied, showing that samples rich in cobalt have thermal expansion coefficients more compatible with common electrolytes, but compromises need to be made between thermal expansion and electrical conductivity.
CERAMICS INTERNATIONAL
(2021)
Article
Electrochemistry
K. Kammer Hansen, L. Deleebeeck
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2020)
Article
Electrochemistry
K. Kammer Hansen
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2020)
Review
Transportation Science & Technology
Kent Kammer Hansen
Summary: This article reviews different techniques for the removal of pollutants from diesel exhaust gasses using an all-solid-state electrochemical reactor, comparing the advantages and drawbacks of different concepts. Early research focused on removing either hydrocarbons or NOx, with high current consumption, while more recent research has shown potential for removing all pollutants with one type of electrochemical reactor, although power consumption remains a challenge.
SAE INTERNATIONAL JOURNAL OF ENGINES
(2021)
Article
Electrochemistry
K. Kammer Hansen
INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY
(2020)
Article
Electrochemistry
Filippo Fenini, Kent Kammer Hansen, Mogens Bjerg Mogensen
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Chemistry, Multidisciplinary
Apiwat Dankeaw, Fabrizio Gualandris, Rafael Hubert Silva, Roberto Scipioni, Kent Kammer Hansen, Bussarin Ksapabutr, Vincenzo Esposito, Debora Marani
ENVIRONMENTAL SCIENCE-NANO
(2019)
Article
Electrochemistry
Rokas Sazinas, Kjeld Bohm Andersen, Soren Bredmose Simonsen, Peter Holtappels, Kent Kammer Hansen
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Materials Science, Multidisciplinary
A. Aly, M. Ghali, A. Osman, M. K. El Nimr
Summary: This study reports the discovery of naturally occurring luminescent graphene quantum dots (GQDs) in coconut water for the first time. The GQDs were identified through various measurements and were found to have dual sizes and emit different wavelengths of light. The GQDs were also utilized as an efficient optical sensor for aniline liquid detection.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zehua Chen, Wencheng Ma, Qinglu Fan, Yanhua Liu, Min Sun, Shuo Wang
Summary: The nanoscale e-VOPO4 materials were successfully prepared by hydrothermal synthesis and calcination, showing high purity and suitable particle size. It exhibited satisfactory electrochemical performance as cathode material for sodium ion batteries, making it a potential candidate for high energy storage systems.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Tao Liu, Yahui Liu, Le Ling, Zhongxi Sheng, Zao Yi, Zigang Zhou, Yongjia Yang, Bin Tang, Qingdong Zeng, Tangyou Sun
Summary: In this paper, a terahertz (THz) micronano device that can switch between bimodal absorption and plasmon-induced transparency (PIT) is proposed. The device consists of layers of graphene, silica, and vanadium dioxide, and has a simple structure, easy tuning, and wide-angle absorption. The device achieves perfect absorption at specific frequencies and is highly sensitive to environmental refractive index. It also has the functions of a three-frequency asynchronous optical switch and slow light effect.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Xiaobo Luo, Songhan Hu, Qiudong Duan, Dacheng Zhou, Jialin Chen, Yugeng Wen, Jianbei Qiu
Summary: The exploration of solar light absorption by a material is important in photonics and optoelectronics. This study reveals the potential of Ba3-xGa2O6:xBi3+ as a promising candidate for various photonic and optoelectronic applications, and demonstrates the use of the material in double-sided laser printing for three-dimensional optical imaging.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Hemin Wang, Yanling Hao, Lele Xiang, Xiaosi Qi, Lei Wang, Junfei Ding, Yunpeng Qu, Jing Xu, Wei Zhong
Summary: This study designed Fe3O4-FeCO3/MWCNTs/RGO MCNCs composites and fabricated large-scale samples using hydrothermal and freeze-drying methods. The microstructural investigation showed that these materials had a mixed-dimensional structure, which improved impedance matching features, polarization, and conduction loss abilities, leading to significantly enhanced electromagnetic absorption properties.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Zhenshan Yu, Hao Chen, Xuequan Chen, Yu-Sheng Lin
Summary: This study presents a silicon dielectric metamaterial (SDM) composed of two outer symmetric semi-circular rings and two inner symmetric split-ring resonators (SRRs). The electromagnetic responses of the SDM device in different modes were studied through numerical simulations and experiments. Increasing the structure height of the SDM device resulted in red-shifted resonances and stronger intensities. This study provides a new design strategy for the development of frequency filtering, polarization switching, and resonance modulation characteristics in THz-wave applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yiming Qi, Na Zhang, Meng Zong, Yangxianzi Liu, Weixing Chen
Summary: This study prepares dielectric/carbon fiber based nanocomposites wave-absorbing materials using liquid diffusion and high temperature carbonization strategies. By tuning the element type, drying mode, and filling amount, the electromagnetic parameters and absorbing properties can be adjusted. The best synthesized sample shows excellent absorbing performance, making it suitable for a wide range of electromagnetic wave absorption applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Carlos D. Gonzales-Lorenzo, T. K. Gundu Rao, Alberto A. Ccollque-Quispe, Jorge Ayala-Arenas, Monise B. Gomes, Betzabel N. Silva-Carrera, Roseli F. Gennari, Valeria S. Pachas, F. Monzon-Macedo, H. Loro, Jose F. D. Chubaci, Nilo F. Cano, Rene R. Rocca, Shigueo Watanabe
Summary: In this study, CaSiO3 doped with different ppm of Eu was synthesized using the devitrification method. Various physical properties were analyzed, revealing that the intensity and temperature of the high-temperature TL peak increased with higher dopant amounts. Fluorescence measurements indicated the presence of Eu2+ and Eu3+ ions in the samples. EPR spectra confirmed the existence of two defect centers.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Yanning Qu, Xinyang Li, Mei Cui, Renliang Huang, Wanquan Ma, Yunting Wang, Rongxin Su, Wei Qi
Summary: In this study, a new molybdenum disulfide/N,S-doped carbon quantum dots (MoS2/N,S-CQDs) heterojunction with enhanced light absorption and electrons transfer di-functional properties was constructed via a facile one-pot hydrothermal method. The heterojunction showed remarkable efficiencies in degrading methylene blue (MB) and malachite green (MG) in an actual water system under simulated sunlight irradiation. The facile synthetic technique and effective multifunctional properties of the composite have the potential for further research and industrial applications.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jiayi Wang, Penggang Ren, Xueyan Zhao, Zhengyan Chen, Yanling Jin, Zengping Zhang
Summary: In this study, a novel homojunction photocatalyst was developed by combining defective g-C3N4 and flaked g-C3N4, which showed excellent degradation performance and cycling stability, and exhibited practicality in several simulation experiments.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Jing Yan, Xiaoxiao Zhao, Weixing Chen, Panbo Liu
Summary: This research presents a self-templated strategy to prepare a spherical superstructure of carbon nanorods through material modification and pyrolysis. The resulting material exhibits a large controllable radius of curvature and shows excellent microwave absorbing properties due to its high specific surface area and mesoporous structure.
MATERIALS RESEARCH BULLETIN
(2024)
Review
Materials Science, Multidisciplinary
Qinglin Zeng, Zepeng Lv, Shaolong Li, Bin Yang, Jilin He, Jianxun Song
Summary: Liquid metal batteries possess stable safety performance, high rate performance, and thermal stability. The electrolyte, an important component of the battery, plays a significant role in achieving these remarkable performance characteristics. This paper reviews the important research progress of liquid metal batteries electrolyte and discusses the influence of different electrolyte types on energy efficiency. It also highlights the limitations and challenges of existing electrolytes and proposes key development directions for liquid metal electrolytes.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Song Wu, Junli Wang, Xuanbing Wang, Di Jiang, Jinlong Wei, Xiaoning Tong, Zhenwei Liu, Qingxiang Kong, Naixuan Zong, Ruidong Xu, Linjing Yang
Summary: In this study, a composite electrode composed of Ti/TiH2/beta-PbO2_Mn3O4@C was fabricated and investigated for zinc electrowinning. The composite electrode exhibited low overpotential, Tafel slope, icorr, and high voltage stability, outperforming most reported Ti-based PbO2 electrode materials. The excellent catalytic activity can be attributed to the low resistance and porous interlayer of TiH2 nanosheets, as well as the addition of Mn3O4@C micro-flakes to the active layer.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
E. Tsoutsoumanos, T. Karakasidis, N. Laskaris, P. G. Konstantinidis, G. S. Polymeris, G. Kitis
Summary: This study investigates the correlation between nanocrystal dimensions and thermoluminescence signal magnitude through simulations conducted in Python. Two mathematical models, OTOR and IMTS, were used to derive theoretical luminescence signals. The obtained results were compared with experimental data and a thorough comparative discussion was conducted.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Vishnu Aggarwal, Sudhanshu Gautam, Aditya Yadav, Rahul Kumar, Bipul Kumar Pradhan, Brajesh S. Yadav, Govind Gupta, Senthil Kumar Muthusamy, Sumeet Walia, Sunil Singh Kushvaha
Summary: Recently, there has been a great demand for highly responsive photodetectors that can detect a wide range of wavelengths. Researchers have successfully fabricated a broadband metal-semiconductor-metal photodetector by integrating sputtered Bi2Se3 with laser molecular beam epitaxy grown GaN film. This photodetector shows high responsivity in both the ultraviolet and near-infrared regions.
MATERIALS RESEARCH BULLETIN
(2024)
