Results 51 to 60 of about 2,258 (200)

First principles study of strain/electronic interplay in ZnO; Stress and temperature dependence of the piezoelectric constants [PDF]

, 2000
We present a first-principles study of the relationship between stress, temperature and electronic properties in piezoelectric ZnO. Our method is a plane wave pseudopotential implementation of density functional theory and density functional linear ...
A. Ahmin, A. Dal Corso, A. M. Rappe, D. M. Ceperley, H. Hohenberg, H. J. Monkhorst, J. C. Phillips, J. E. Jaffe, J. E. Jaffe, J. L. Martins, J. P. Perdew, J. R. Chelikowsky, L. F. Mattheiss, L. Kleinman, M. C. Payne, M. T. Yin, N. A. Hill, Nicola A. Hill, O. H. Nielsen, P. Bendt, P. Schröer, R. E. Cohen, R. E. Cohen, R. LeSar, S. Bloom, S. G. Louie, U. Rossler, U. V. Waghmare, Umesh Waghmare, W. Kohn, X. Gonze, X. Gonze, X. Gonze   +32 more
core   +2 more sources

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  

Boundary breakdown time of ZnO varistors under nanosecond pulse current

AIP Advances, 2019
Conductive properties of zinc oxide (ZnO) varistor ceramics depend on the boundary barrier structure. By using the photoconductivity switches (PCSS) technology, the boundary breakdown characteristics of ZnO varistors for nanosecond electric pulse ...
Guangyong Xie, Mengyuan Wu, Wei Shi
doaj   +1 more source

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

Percolation effects in dc degradation of ZnO varistors [PDF]

Journal of Advanced Dielectrics, 2015
For quantitative estimation of the degree of electrical disorder (electrical inhomogeneity) in ZnO varistor ceramics caused by a variation in the barrier height at different grain boundaries in a sample, the comparison of threshold electric fields ...
A. S. Tonkoshkur, A. B. Glot, A. V. Ivanchenko   +2 more
doaj   +1 more source

Growth Techniques for Bulk ZnO and Related Compounds

, 2011
ZnO bulk crystals can be grown by several methods. 1) From the gas phase, usually by chemical vapor transport. Such CVT crystals may have high chemical purity, as the growth is performed without contact to foreign material.
Galazka, Zbigniew, Ganschow, Steffen, Klimm, Detlef, Schulz, Detlev, Uecker, Reinhard   +4 more
core   +1 more source

Growth of ZnO thin films on GaAs by pulsed laser deposition [PDF]

, 1995
ZnO thin films have been grown on GaAs substrates using the pulsed laser deposition technique with or without a photodeposited SiO2 buffer layer. The presence of the SiO2 layer has a beneficial effect on the crystalline quality of the grown ZnO films ...
Boyd, Ian W., Craciun, V., Elders, J., Gardeniers, J.G.E., Geretovsky, J.   +4 more
core   +3 more sources

Comparative study of two synthesis methods to obtain ZnO-Pr2O3-CoO ceramic powders [PDF]

, 2004
[ES] Los polvos cerámicos de ZnO - Pr2O3 - CoO son utilizados como materia prima para la fabricación de varistores. Estos dispositivos presentan una característica corriente - voltaje altamente no lineal que permiten su uso como conmutadores de estado ...
Caballero Cuesta, Amador, Cruz, Ana Milena, Rodríguez Páez, Jorge E., Villegas, Marina, Ávila, H.   +4 more
core  

Calculation model by Voronoi network and verification of zinc oxide varistor considering conduction mechanism

International Journal of Ceramic Engineering &Science, Volume 7, Issue 2, March 2025.
In this paper, a method to improve the performance of varistor with the help of computational model was presented and verified by experiments. Abstract This paper investigates the impact of the microstructure of zinc oxide varistor ceramics on their electrical properties.
Xiao Lei, Xin Ning, Peng Liu, Pengfei Meng, Yue Yin, Jingke Guo   +5 more
wiley   +1 more source

The growth of ZnO crystals from the melt

, 2008
The peculiar properties of zinc oxide (ZnO) make this material interesting for very different applications like light emitting diodes, lasers, and piezoelectric transducers.
Bates, D. Klimm, D. Schulz, Desgreniers, Frank, Gadzhiev, Halvorson, Helbig, Iwanaga, Jordan, Logan, Look, Machida, Maeda, Miller, Naumowicz, Nause, Nause, Ohshima, R. Fornari, Reynolds, Richman, S. Ganschow, Sadofev, Sato, Schiefelbein, Schulz, Tomm, Uecker, Wanklyn, Wenzl   +30 more
core   +1 more source