Results 31 to 40 of about 487 (185)
Cerâmica, 2006 Varistores à base de SnO2 foram preparados pelo processo convencional de mistura de óxidos. As amostras foram sinterizadas a 1250 °C por 2 h. Os difratogramas obtidos por difração de raios X e as análises por microscopia eletrônica de varredura ...
M. M. Oliveira +6 more
doaj +1 more source
International Journal of Applied Ceramic Technology, Volume 23, Issue 4, August 2026.ABSTRACT This study examines the impact of aging on the electrical and structural properties of positive temperature coefficient of resistance (PTCR) ceramics. The presented study introduces a correlative scanning electron microscopy (SEM)/conductive atomic force microscopy (C‐AFM) approach enabling repeated, site‐specific characterization of ...
Kryštof Koller +4 more
wiley +1 more source
Performance and Mechanism Research on ZnO Varistor Ceramics Prepared by Microwave Sintering
International Journal of Ceramic Engineering &Science, Volume 8, Issue 4, July 2026.Microwave sintering yields superior electrical performance of ZnO varistor ceramics versus conventional sintering, clarifies its grain boundary defect regulation mechanism, and provides a low‐energy, high‐efficiency preparation strategy. ABSTRACT To solve the problems of high sintering temperature, uneven grain growth, and limited electrical property ...
Zhiyao Fu +3 more
wiley +1 more source
Control of Varistor Voltage by Grain-size Control of Bi-added ZnO Varistors
IOP Conference Series: Materials Science and Engineering, 2011 Relationship between the grain size of ZnO and the amounts of Bi and Sb for Bi-Ba-Sb-Co-Mn-added ZnO was investigated. The amount of Bi at which the grain size of ZnO became the maximum shifted to the notably larger one by adding small amount of Sb such as 0.01 mol%.
Fukumori, Ai +3 more
openaire +1 more source
High Voltage, Volume 11, Issue 3, Page 738-750, June 2026.ABSTRACT High altitude electromagnetic pulse (HEMP), as a steep slope and high amplitude instantaneous energy shock, has stronger coupling and greater destructive power, which can easily cause the secondary control device of the substation to malfunction.
Long Jin +5 more
wiley +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.Abstract Electromagnetic sounding coupled with experimental measurements of electrical conductivity (EC) can provide valuable constraints on the thermochemical state of Earth's lower mantle. Here, we report a new set of experimentally determined EC values of pyrolite, a candidate composition of the lower mantle, between 25 and 80 GPa at room ...
Charlotte Trubowitz +10 more
wiley +1 more source
Strain‐Induced Redistribution of Point Defects in ZnO Nanoparticles
Small Science, Volume 6, Issue 3, March 2026.Powder compaction generates local strain effects in ZnO nanoparticles. This alters the abundance of intrinsic point defects and impacts the semiconductor's electronic structure. Such changes were analyzed by a combination of spectroscopy and density functional theory calculations and emphasize the importance of strain effects in the design and ...
Korbinian Aicher +4 more
wiley +1 more source
Ultra‐Rapid Blacklight Sintering for ZnO‐Based Varistors With Optimized Functional Properties
Journal of the American Ceramic Society, Volume 109, Issue 3, March 2026.ABSTRACT The increasing demand for energy‐efficient optoelectronic systems has intensified interest in high‐performance ceramic varistors, which are critical components in surge protection applications. In this study, ZnO‐based varistors were fabricated using a novel blacklight sintering (BLS) technique, which employs high‐powered blue light, and were ...
Ahmad Sayyadi‐Shahraki +4 more
wiley +1 more source
Sintesis de ceramicos de ZnO dopados con praseodimio y cobalto
Materials Research, 2003 Zinc oxide, ZnO, is a very interesting compound in science and electronic ceramics technology. ZnO ceramics containing some additives were reported to show varistor action with excellent nonlinearity in current - voltage characteristics.
Ana Milena Cruz +3 more
doaj +1 more source
Grain Boundary Space Charge Engineering of Solid Oxide Electrolytes: Model Thin Film Study
Advanced Functional Materials, Volume 36, Issue 14, 16 February 2026.This study demonstrates unprecedented control of grain boundary electrical properties in solid electrolytes. Selective diffusion of cations through grain boundaries in thin films enables 12 orders of magnitude variation in ionic resistance, proving that systematic chemical modification of grain boundary electrical properties is feasible.
Thomas Defferriere +5 more
wiley +1 more source