Results 51 to 60 of about 479 (183)

Enhanced dielectric response and non-Ohmic properties of Ge-doped CaTiO3/CaCu3Ti4O12

Journal of Asian Ceramic Societies, 2022
We present a method for increasing the dielectric constant of CaTiO3/CaCu3Ti4O12 (CTO/CCTO) composites and retaining a low-loss tangent (tanδ) by doping with Ge dopant.
Jirata Prachamon, Jakkree Boonlakhorn, Narong Chanlek, Nutthakritta Phromviyo, Viyada Harnchana, Pornjuk Srepusharawoot, Ekaphan Swatsitang, Prasit Thongbai   +7 more
doaj   +1 more source

Simulation‐Based Material Design for HVDC Cable Accessories

High Voltage, Volume 11, Issue 1, Page 25-36, February 2026.
ABSTRACT The worldwide increasing demand for electricity, coupled with the need for more reliable infrastructures and more interconnected networks, has put forward high voltage direct current (HVDC) technologies for energy transmissions. Questions still arise as regards synthetic insulation for cable systems and accessories, as it remains one of the ...
Thi Thu Nga Vu, Gilbert Teyssèdre, Séverine Le Roy   +2 more
wiley   +1 more source

Simulação da difusão do zinco e do oxigênio, e análise da durabilidade de varistor de ZnO utilizando o planejamento fatorial

Cerâmica, 2000
A durabilidade do varistor de ZnO está relacionada com suas características elétricas, microestruturais, térmicas e com o fenômeno de transporte de massa nos contornos de grão durante o processo de operação do varistor.
Pariona M. M., Pianaro S. A.
doaj  

The mathematics of varistors

European Journal of Applied Mathematics, 2016
A three-dimensional model of the varistor device is proposed. The thermal and electric conductivity of the material are taken to depend, in addition to the electric potential, on the temperature. Two theorems of existence and uniqueness of solutions for the boundary-value problem which determine the potential and the temperature inside the device are ...
openaire   +1 more source

Technical Progress, Challenges and Prospects of HVDC Cable Accessories: A Review With Chinese Practice Insights

High Voltage, Volume 11, Issue 1, Page 1-24, February 2026.
ABSTRACT With the development of deep‐sea wind power and large‐scale onshore clean energy, the global demand for higher voltage level DC cable power transmission technology has become increasingly urgent. This paper systematically reviews the technical advancements in high voltage direct current (HVDC) cable accessories, addressing design challenges of
Zongxi Liu, Benhong Ouyang, Kaiwen Huang, Yuli Wang, Jiankang Zhao, Peng Zhao   +5 more
wiley   +1 more source

Abnormal Expansion Along the Synthesis of Zinc Stannate: A Way for Porous Ceramics Without Addition of Pore Generators

Journal of the American Ceramic Society, Volume 109, Issue 2, February 2026.
The abnormal expansion associated with the simultaneous synthesis and sintering of Zn2SnO4 from ZnO and SnO2 is due to the reaction mechanism and correlated with the conversion. This phenomenon opens the way to manufacture porous ceramics without the addition of pore generators, simplifying the process, and especially the thermal treatment.
María José Orts, Eugeni Cañas, Valentín Pérez‐Herranz, Sergio Mestre   +3 more
wiley   +1 more source

Comportamento reológico de suspensões aquosas de um sistema varistor à base de ZnO Rheological properties of aqueous suspensions of a ZnO varistor system

Cerâmica, 2007
O comportamento reológico de suspensões cerâmicas apresenta forte dependência do pH, quantidade de dispersante e concentração de sólidos. Quando dispersões são compostas por vários óxidos diferentes, o comportamento reológico pode ser afetado de maneira ...
S. L. M. Brito, D. Gouvêa, R. Ganzella
doaj   +1 more source

Accurate Fault Current Phasor Estimation in Series‐Compensated Transmission Lines Using Improved Particle Swarm Optimisation

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
A new evolutionary search algorithm based on improved Particle Swarm Optimisation (PSO) is introduced in this study to estimate the phasor. The performance has been evaluated through extensive simulations considering transient components, harmonics, and frequency changes in noiseless and noisy conditions.
Seyedeh Mina Abed Shiadeh, Ali Akbar Abdoos, Ali Ebadi   +2 more
wiley   +1 more source

The Role of Polypyrrole in Electrical Properties of ZnO-Polymer Composite Varistors [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2017
Composite films on the base of ZnO with different weight percentages of polypyrrole have been prepared using the hot pressing method and their current-voltage characteristics have been studied. Results show that the films have nonlinear varistor behavior
Nasim Asaadi, Mojtaba Parhizkar, Sajedeh Mohammadi Aref, Hassan Bidadi   +3 more
doaj  

Determining the effect of bismuth oxide on the microstructure and electrical response of cold‐sintered ZnO varistors

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Abstract Microstructure homogeneity and grain size reduction are needed to ensure the current uniformity and reliability required in metal oxide varistors for DC circuit breakers. Cold sintering (CS)–a low‐temperature digestive liquid and high‐pressure densification process–has previously shown reduced grain growth, but it is not clear how the lower ...
Kayla Y. Chuong, Yang Liu, Thomas Forbes, Marshall B. Frye, Lukas Graber, Lauren M. Garten   +5 more
wiley   +1 more source