Article
Chemistry, Multidisciplinary
Min-Woo Kim, Max L. Lifson, Rebecca Gallivan, Julia R. Greer, Bong-Joong Kim
Summary: Ultralow-k materials with mechanical resilience and electrical stability are needed for high voltage devices. 3D hollow-beam nanolattices have emerged as promising candidates, but their properties deteriorate after five stress cycles. In this study, alumina nanolattices with different density distributions demonstrate a deterministic mechanical response and higher electrical breakdown strength. These nanolattices exhibit ultralow-k, complete electrical and dielectric stability, and mechanical recoverability over 100 compressions to 62.5% strain. The enhanced insulation and long-term stability are explained by the bi-phase deformation mechanism, providing high strength and ductility.
ADVANCED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Fuad N. Alhabill, Hashim Bhabha, Stuart Harmer, Alun S. Vaughan, Yan Wang, Dayuan Qiang
Summary: The study found that formulations with an excess of epoxide groups in epoxy networks have lower water absorption, which in turn reduces the glass transition temperature of the material. The presence of water molecules masks network polar sites, inhibiting the formation of hydrogen bonds. Additionally, the absorbed water enhances charge transport in the material.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2021)
Article
Engineering, Electrical & Electronic
Z. Raddaoui, R. Brahem, A. Bajahzar, H. M. Albetran, J. Dhahri, H. Belmabrouk
Summary: The new perovskite BSTZO ceramic exhibits a tetragonal structure with conductivity spectra following the double Jonscher law. The conduction behavior is described by the Correlated Barrier Hopping model at low temperatures and the Non-overlapping Small Polaron Tunneling mechanism at high temperatures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
F. Gadhoumi, A. Lahmar, N. Abdelmoula, M. El Marssi, H. Khemakhem
Summary: BFMO was prepared under air and N2 atmospheres, with the latter showing higher crystallinity and lower secondary phase content. The material exhibited high dielectric permittivity and low dielectric loss, as well as ferroelectric and weak ferromagnetic characteristics at room temperature. The electrical and magnetic properties suggest potential technological applications for BFMO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Sophie Bresch, Bjoern Mieller, Paul Mrkwitschka, Ralf Moos, Torsten Rabe
Summary: Thermoelectric generators can be utilized for sensor applications, with highly automated production processes. The development of a glass-ceramic composite material optimized for multilayer generators is crucial for performance enhancement. The material exhibits excellent physical properties and can be tuned for specific applications through varying glass composition or dispersion phases.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Z. Raddaoui, S. El Kossi, R. Brahem, A. Bajahzar, A. Valentinovich Trukhanov, A. Leonidovich Kozlovskiy, M. Vladimirovich Zdorovets, Jemai Dhahri, H. Belmabrouk
Summary: The study on the perovskite sample La0.7Sr0.25Na0.05Mn0.7Ti0.3O3 (LSNM0.70T0.30) revealed that the electrical conduction process is based on different theoretical models, and the high values of permittivity suggest potential for microelectronic applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Gurpreet Kaur, Dinesh Singh Rana
Summary: The paper presents the synthesis of PVDF composite films modified with NiO to achieve efficient dielectric properties for potential applications in energy harvesting and sensing devices. The composite films exhibit a maximum dielectric constant of 100 at 20 Hz with 7 wt% of NiO, attributed to improved interfacial polarization. Additionally, the modified films show an increase in AC conductivity with temperature at higher frequencies, indicating potential charge carrier migration.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Polymer Science
Yan Yu, Yan Zhao, Bin Huang, Yanwei Ji, Yunfeng Zhao, Zhijie Zhang, Hua- Feng Fei
Summary: This study investigates the effect of phenyl side groups on the dielectric properties of polysiloxane, and shows that introducing appropriate amount of phenyl side groups can improve the dielectric constant and electrical breakdown strength. The study also highlights the contribution of alpha- and beta-relaxations to the dielectric loss of the material.
Article
Materials Science, Ceramics
S. Stark
Summary: The paper examines the relationship between dielectric breakdown strength of solid insulators and sample thickness, suggesting that electrode edge effects may play a role in this relationship.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Physics, Applied
Zhen Zhang, Shengwen Shu, Zhiguo Wang, Zhengqiu Xie, Huizhong Wang, Chunchun Li, Shanming Ke, Longlong Shu
Summary: In this study, the interplay of flexoelectricity and permittivity in CCTO ceramic was systematically studied. An abnormal flexoelectric transition was observed at 95℃. It was found that below this critical temperature, the barrier layer mechanism dominates the flexoelectricity in CCTO ceramic, while above this critical temperature, the flexoelectric response mainly originates from the contributions of semiconducting grains and insulating grain boundaries.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Wenyi Yang, D. D. L. Chung
Summary: This study examines the effect of temperature on the conduction and dielectric behavior of solder, with findings showing that electrical resistivity increases linearly with temperature while relative permittivity remains constant. The increase in thermal vibration amplitude affects the conduction behavior more than the dielectric behavior, making solder an attractive option as electrical conductors in electronics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Yi Zhou, Xiaohua Huang, Lei Jiang, Ying Hou, Hongyi Lin, Zaijun Cheng, Dong Sun
Summary: The Bi1-xNdxFeO3 (BNFO) ceramics were fabricated and studied for their structural phase transition and impedance spectra characteristics. The grain effect dominates the single non-Debye thermally activated relaxation process, and an equivalent parallel circuit with RC element and constant phase element can interpret the impedance Nyquist plots for all the samples. The frequency-dependent impedance and modulus spectra as well as the ac conductivity analysis reveal the primary role of localized conductivity in the BNFO system, which is possibly influenced by the structural phase transition.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Applied
Anton Tuluk, Sybrand van der Zwaag
Summary: This study investigates the effect of quenching and annealing on a new ternary piezoelectric ceramic, and finds that an optimal heat treatment can yield a quasi-stable piezoelectric constant value. The study also reveals unusual defect behavior in this novel system. The quenching and annealing process is reversible and can be combined with additional chemical modifications to tailor the material's properties.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Ceramics
Jiawei Zhang, Jian Wang, Dandan Gao, Huan Liu, Jiyang Xie, Wanbiao Hu
Summary: By doping Sm3+ ions at the A-site and introducing A-site vacancies, high energy density capacitors with improved crystal structure and permittivity were successfully prepared. The dielectric breakdown strength was significantly enhanced while maintaining high energy storage density and efficiency, outperforming many existing materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Qi Wang, Yuheng Deng, Malvern Yap, Yan Yang, Jielin Ma, Wen Kwang Chern, Jin Li, Zhong Chen
Summary: This paper presents a simulation scheme based on the PFCZM for electrical tree modelling and confirms the validity of the model through experiments. The results show that the epoxy resin enhanced with silica and graphene has significant improvements in dielectric breakdown time and thermal conductivity.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Konstantin Livanov, Hans Jelitto, Gerold A. Schneider, H. Daniel Wagner
JOURNAL OF MATERIALS SCIENCE
(2018)
Article
Materials Science, Ceramics
Joao Gustavo Pereira da Silva, Amir Nazari Yamchelou, Audrey Debris, Christian Wieck, Hans Jelitto, Hazim Ali Al-Qureshi, Rolf Janssen
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2017)
Article
Chemistry, Multidisciplinary
Eric H. Hill, Christoph Hanske, Alexander Johnson, Luis Yate, Hans Jelitto, Gerold A. Schneider, Luis M. Liz-Marzan
Article
Materials Science, Multidisciplinary
H. Jelitto, G. A. Schneider
Article
Materials Science, Ceramics
Diego Blaese, Tobias Benitez, Marcelo Barros, Hans Jelitto, Nahum Travitzky, Dachamir Hotza, Rolf Janssen
CERAMICS INTERNATIONAL
(2018)
Article
Materials Science, Ceramics
M. Lugovy, N. Orlovskaya, V. Slyunyayev, E. Mitrentsis, M. Neumann, C. G. Aneziris, H. Jelitto, G. A. Schneider, J. Kuebler
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2018)
Article
Materials Science, Ceramics
M. Lugovy, N. Orlovskaya, M. Neumann, C. G. Aneziris, H. Jelitto, G. A. Schneider, J. Kuebler
ADVANCES IN APPLIED CERAMICS
(2019)
Article
Materials Science, Ceramics
Marc Neumann, Patrick Gehre, Jakob Kuebler, Natalia Dadivanyan, Hans Jelitto, Gerold A. Schneider, Christos G. Aneziris
CERAMICS INTERNATIONAL
(2019)
Article
Materials Science, Ceramics
Marc Neumann, Tony Wetzig, Jens Fruhstorfer, Vicky Lampert, Hans Jelitto, Gerold A. Schneider, Christos G. Aneziris
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Multidisciplinary
Berta Domenech, Alvin T. L. Tan, Hans Jelitto, Eduardo Zegarra Berodt, Malte Blankenburg, Oliver Focke, Jaclyn Cann, C. Cem Tasan, Lucio Colombi Ciacchi, Martin Mueller, Kaline P. Furlan, A. John Hart, Gerold A. Schneider
ADVANCED ENGINEERING MATERIALS
(2020)
Article
Materials Science, Ceramics
Marcelo Daniel Barros, Hans Jelitto, Dachamir Hotza, Rolf Janssen
Summary: Doping alumina with TiO2-MnO allows for higher density and mechanical properties at lower sintering temperatures. Diffusion of dopants was observed between doped and pure layers. However, an increase in porous interlayer thickness resulted in a decrease in strength for the laminates.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Marc Neumann, Patrick Gehre, Rapuruchukwu Ifeyinwa Nwokoye, Hans Jelitto, Gerold A. Schneider, Christos G. Aneziris
Summary: The main objective of this research is to predict the lifetime of self-supporting flame-sprayed Al2O3 and Al2O3-ZrO2-TiO2 materials under constant load, revealing differences in flexural strength, energy release, and subcritical crack growth parameters between the two materials. However, the characteristic lifetime is not significantly different. The conclusion drawn is that the lifetime performance under constant load application is governed by the flame-spray microstructure.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Marcelo Daniel Barros, Dachamir Hotza, Hans Jelitto, Rolf Janssen
Summary: Porous alumina layers were successfully produced using colloidal processing with the addition of polystyrene spheres as pore formers. These layers showed promising performance in resisting crack propagation. However, there were no significant differences in mechanical strength and fracture properties compared to a monolithic reference.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
H. Jelitto, G. A. Schneider
Article
Multidisciplinary Sciences
Hans Jelitto, Gerold A. Schneider