Article
Computer Science, Information Systems
Andrzej Laczewski, Krzysztof Kasinski
Summary: In this study, a solution for temperature stabilization and enforcement in IC test systems is presented. The solution is versatile and supports various package types and temperature ranges.
Article
Chemistry, Physical
Guan-Yu Liu, Wei-Feng Sun, Qing-Quan Lei
Summary: By employing a novel semiconductor electrode to inject characteristic charge carriers into polymer dielectric, this study delves into the injection and capture behaviors of electrons and holes. Through TSC experiments and first-principles calculations, the charge characteristics injected by the novel electrode and the corresponding dielectric behavior are analyzed. This research helps distinguish between hole and electron traps in polymer dielectrics.
Article
Materials Science, Ceramics
Thomas J. Moran, Keigo Suzuki, Tadasu Hosokura, Alexander Khaetskii, Bryan D. Huey
Summary: By using atomic force microscopy to characterize discharging dynamics, researchers have found that microstructures in insulating materials can significantly affect discharging rates. This provides insight into optimizing microstructures for improved capacitor performance.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Review
Chemistry, Multidisciplinary
Guoli Du, Jinlong Wang, Yanhua Liu, Jinxia Yuan, Tao Liu, Chenchen Cai, Bin Luo, Siqiyuan Zhu, Zhiting Wei, Shuangfei Wang, Shuangxi Nie
Summary: In this review, the fabrication methods and performance enhancements of cellulosic triboelectric materials via dielectric modulation are comprehensively discussed. The advantages and progress in cellulosic materials are highlighted, and the challenges and future opportunities for cellulose dielectric modulation are summarized.
Article
Engineering, Electrical & Electronic
Jiaxin Chen, Yang Wu, Kai Wu, Zepeng Lv
Summary: The study modified a PEA device to test charge distribution in epoxy resin at 77 K and found that charges are less active at low temperature, with slower dissipating rate and lower injection quantity compared to the case at 293 K.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2021)
Article
Materials Science, Multidisciplinary
Takeshi Oda, Koji Yamaguchi, Tomofumi Kadoya, Hiroyuki Tajima
Summary: Accumulated charge measurement (ACM) is an experimental technique used to study the charge injection and extraction process in a capacitor composed of metal 1 (M1), insulator, organic semiconductor (OS), and metal 2 (M2). By integrating the displacement current, the change in the accumulated charge (Qacc) can be estimated. This study presents a new ACM scheme and discusses its application to pentacene/Au and metal-free phthalocyanine (H2Pc)/Au junctions.
ORGANIC ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Qingmin Wang, Yang Liu, Mohan Zhang, Xia Bai, Zhiwei Guo
Summary: A dielectric resonator-based sensor demonstrates high sensitivity in temperature measurement, with a simple structure conducive to sensor integration. The resonator produces strong localized electromagnetic field at resonance, allowing for accurate temperature measurement.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Analytical
John P. McGee, Michael W. Senko, Kevin Jooss, Benjamin J. Des Soye, Philip D. Compton, Neil L. Kelleher, Jared O. Kafader
Summary: Charge detection mass spectrometry (CDMS) is a method for detecting mass spectra of large and highly heterogeneous analytes. CDMS has been multiplexed on Orbitrap instruments to achieve Individual Ion Mass Spectrometry (I2MS). In this study, an automated method called Automatic Ion Control (AIC) was developed to adjust ion injection times in I2MS for image current detectors like the Orbitrap. AIC utilizes signal density in the m/z domain to adjust ions in real-time for sample adaptability, online separations, and ease of use. The technique was successfully applied to denatured and native proteins, producing high quality data without human intervention directly in the mass domain.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Sunao Shimomoto, Tomofumi Kadoya, Toshiaki Tanimura, Kazusuke Maenaka, Tokuji Yokomatsu, Takeshi Komino, Hiroyuki Tajima
Summary: This study investigated the charge injection barrier at the H2Pc/Pd interface using ACM, revealing a hole injection barrier of 0.26 eV and an electron injection barrier of 2.49 eV. Positive offset voltage allowed for the determination of band gap and electron injection barrier at the LUMO/Pd interface.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Ceramics
Xi Wang, Shicheng Zhou, Kaiyang Liu, Shan Deng, Yaqi Xiao, Xiuli Chen, Huanfu Zhou
Summary: Extensive research has been conducted on microwave dielectric materials for their application in 5G and 6G communication technologies. This study broadened the sintering temperature range of MT-C ceramics using a composite of CeO2 and Mg2TiO4 ceramics, and stabilized their microwave dielectric performance. The prepared MT-C ceramics exhibited low loss and uniform density, making them suitable for industrial applications in the field of communication.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Zahra Barani, Tekwam Geremew, Megan Stokey, Nicholas Sesing, Maedeh Taheri, Matthew J. Hilfiker, Fariborz Kargar, Mathias Schubert, Tina T. Salguero, Alexander A. Balandin
Summary: This study demonstrates a unique class of quantum composites based on polymers with fillers composed of a van der Waals quantum material. These composites reveal multiple charge-density-wave quantum condensate phases. Typically, materials exhibiting quantum phenomena are crystalline, pure, and have few defects. However, in this research, the macroscopic charge-density-wave phases of the filler particles are successfully preserved even after multiple composite processing steps. The prepared composites display strong charge-density-wave phenomena at temperatures even above room temperature and show potential for advanced applications in energy storage and electronics.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yu Han, Yinlin Chen, Yujie Ma, Jamie Bailey, Zi Wang, Daniel Lee, Alena M. Sheveleva, Floriana Tuna, Eric J. L. McInnes, Mark D. Frogley, Sarah J. Day, Stephen P. Thompson, Ben F. Spencer, Marek Nikiel, Pascal Manuel, Danielle Crawshaw, Martin Schroder, Sihai Yang
Summary: This paper reports the high adsorption of benzene at low pressure and efficient separation of benzene/cyclohexane achieved by controlling the pore chemistry of two families of robust metal-organic frameworks, UiO-66 and MFM-300. UiO-66-CuII exhibits exceptional adsorption of benzene at 3.92 mmol g-1 and MFM-300(Sc) shows a high selectivity of 166 for the separation of benzene/cyclohexane (v/v = 1/1) mixture. The binding mechanisms of benzene and cyclohexane in these materials are revealed through in situ synchrotron X-ray diffraction, neutron powder diffraction, and multiple spectroscopic techniques. Reversible binding of benzene at an open Cu(II) site within metal-organic frameworks is also visualized for the first time.
Article
Engineering, Electrical & Electronic
Yoji Yasumoto, Taro Kuwano, Hiroki Taniguchi, Shinobu Fujihara, Manabu Hagiwara
Summary: Doping of La3+ into ferroelectric Bi(2)SiO(5) induces disorder in its crystal structure, leading to a transition into a paraelectric phase with superior temperature stability. Bulk La-doped Bi(2)SiO(5) ceramics were fabricated through sintering for potential use in ceramic capacitors.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhaoyu Ran, Rui Wang, Jing Fu, Mingcong Yang, Manxi Li, Jun Hu, Jinliang He, Qi Li
Summary: Inspired by the stable double helix structures of DNA, spiral-structured dielectric polymers are demonstrated to have both high thermal stability and great capacitive performance. The introduction of spiral groups weakens electrostatic molecular interaction, induces proper molecular chain stacking structure, and regulates the charge transfer process, resulting in significantly improved discharged energy densities and charge-discharge efficiency at high temperatures. The molecular design of these polymers offers a new dimension for achieving balanced thermal and dielectric properties, and ultimately desired capacitive energy storage performance at high temperatures.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Mao-Sheng Cao, Jin-Cheng Shu, Bo Wen, Xi-Xi Wang, Wen-Qiang Cao
Summary: This study investigates the crucial role of understanding dominating electromagnetic response and energy conversion for achieving tunable electromagnetic function at elevated temperature. By analyzing dielectric genes inside 2D carbon-based materials, especially genetic genes, the contribution of conduction and relaxation to electromagnetic response is highlighted. The detailed evolution of dielectric genes related to Fe3O4 content, temperature, and spatial distribution provides a promising approach for tunable microwave absorption performance.
Editorial Material
Engineering, Electrical & Electronic
Lars Lundgaard
IEEE ELECTRICAL INSULATION MAGAZINE
(2019)
Article
Computer Science, Interdisciplinary Applications
I. Madshaven, O. L. Hestad, P. -O. Astrand
Summary: The software simulates the propagation of positive streamers in dielectric liquids used for electric insulation of high-power equipment. It models electrical breakdown in a needle-plane geometry and is capable of calculating the electric field in the liquid to determine if an electron avalanche can initiate and meet the Townsend-Meek criterion for streamer propagation. The software, written in Python and released under an MIT license, demonstrates its versatility and capability through model simulations.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
O. Hestad, M. Runde, H. Enoksen, N. Magnusson
Summary: A finite-element model has been developed to simulate the temperature, electric field, and pressure dynamics of the insulation layer in power cables. The model accurately replicates the pressure behavior and viscoelastic properties of the lead sheath, which are crucial in studying the formation of potentially harmful cavities.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2022)
Article
Engineering, Electrical & Electronic
Torbjorn Andersen Ve, Oystein L. Hestad, Sverre Hvidsten
Summary: In this study, the impact of water sorption on the dielectric properties of PEEK insulation was investigated. It was found that as the temperature increased, the water absorption capacity of PEEK decreased and the electrical conductivity increased significantly. The conduction mechanism in wet PEEK insulation is likely ionic hopping.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Proceedings Paper
Energy & Fuels
Inge Madshaven, Lars Lundgaard, Henrik Enoksen, Stefan Jaufer, Christoph Krause, Borut Prasnikar, Asgeir Mjelve
Summary: This paper introduces a new system for measuring the clamping pressure of transformer windings. Clamping pressure is crucial for ensuring the integrity of transformers, especially during short circuit events. By directly measuring clamping pressure and temperature, along with physical models, condition-based maintenance and digital twins can be implemented.
2022 7TH INTERNATIONAL ADVANCED RESEARCH WORKSHOP ON TRANSFORMERS (ARWTR 2022)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Oystein L. Hestad, Torstein Grav Aakre, Havard Barug, Lars Lundgaard
Summary: Conduction currents were measured in neat n-Tridecane under stepped voltage. The study found currents observed under both polarities with similar onset threshold, but larger currents were recorded under negative polarity. The shape and polarity dependence of the charge recordings suggested that charge generation occurred in the bulk, although charge injection from the needle electrode could not be ruled out.
2022 IEEE 21ST INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS (ICDL)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Cedric Lesaint, Sverre Hvidsten, Oystein Hestad, Elise Olsen, Karl Magnus Bengtsson
Summary: The analysis of inception sites of vented water-trees in a modern HV XLPE cable aged in salt water was conducted using SEM coupled with EDX. The initial results presented in this study suggest that measurements at the sample sub-surface only may not be sufficient to reliably detect the ions causing vented water treeing. The FIB - milling technique showed promise as a potential method for further analysis.
2021 IEEE ELECTRICAL INSULATION CONFERENCE (EIC)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Dag Linhell, Lars E. Lundgaard
Summary: The paper insulation on transformer windings may contain moisture, leading to bubbling under sudden overload conditions when the insulation heats up much faster than the oil. Different heating systems have been developed to study bubbling temperature variation with winding moisture, aging state, or pre-overload temperature. The setup includes features for controlling moisture levels and simulating rapid temperature increase to detect bubbling occurrences.
2021 IEEE ELECTRICAL INSULATION CONFERENCE (EIC)
(2021)
Article
Physics, Multidisciplinary
Dag Linhjell, Lars Lundgaard, Mikael Unge, Olof Hjortstam
JOURNAL OF PHYSICS COMMUNICATIONS
(2020)
Article
Physics, Multidisciplinary
Lars Lundgaard, Dag Linhjell, Oystein L. Hestad, Mikael Unge, Olof Hjortstam
JOURNAL OF PHYSICS COMMUNICATIONS
(2020)
Article
Physics, Multidisciplinary
I. Madshaven, P-O Astrand, O. L. Hestad, S. Ingebrigtsen, M. Unge, O. Hjortstam
JOURNAL OF PHYSICS COMMUNICATIONS
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
I. Madshaven, P-O. Astrand, O. L. Hestad, M. Unge, O. Hjortstam
2017 IEEE 19TH INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS (ICDL)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Oystein L. Hestad, Dag Linhjell, Lars E. Lundgaard, Jarl O. Samseth, Mikael Unge
2017 IEEE 19TH INTERNATIONAL CONFERENCE ON DIELECTRIC LIQUIDS (ICDL)
(2017)
