Results 61 to 70 of about 2,272 (222)

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

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

Modeling of electrical transport in Zinc Oxide varistors [PDF]

Advances in Radio Science, 2014
The electrical transport in zinc oxide (ZnO) varistors is analyzed using microstructural material modeling. The fully three dimensional current distribution is computed by means of a nonlinear equivalent circuit model representing the assembly of current
K. Bavelis, E. Gjonaj, T. Weiland
doaj   +1 more source

Photopyroelectric spectrum of MNO2 Doped Bi2O3 - TiO2 - ZnO ceramic combination [PDF]

, 2008
Photopyroelectric spectroscopy is used to study the energy band-gap of the ceramic (ZnO 0.25 Bi2O3 +0.25 TiO2 + x MnO2), x = 0 - 1.3 mol%, sintered at isothermal temperature 1190 and 1270°C for 2 hours in air.
Hashim, Mansor, Mat Yunus, Wan Mahmood, Rizwan, Zahid, Shaari, Abdul Halim, Zakaria, Azmi   +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

Fabrication and electrical characteristics of flash-sintered SiO2-doped ZnO-Bi2O3-MnO2 varistors

Journal of Advanced Ceramics, 2020
The dense ZnO-Bi2O3-MnO2-xSiO2 (ZBMS) varistors for x = 0, 1, 2, 3 wt% were fabricated by flash sintering method under the low temperature of 850 °C within 2 min. The sample temperature was estimated by a black body radiation model in the flash sintering
Pai Peng, Yujun Deng, Jingpeng Niu, Liyi Shi, Yunzhu Mei, Sanming Du, Juan Liu, Dong Xu   +7 more
doaj   +1 more source

Microstructural evaluation of rare-earth-zinc oxide-based varistor ceramics

Materials Research, 2005
Zinc oxide varistors are nonlinear voltage dependent ceramic resistors used to suppress and limit transient voltage surges. The work reported in this paper involves the relationship between microstructural characteristics and the varistor performance of ...
José Geraldo de Melo Furtado, Luiz Antônio Saléh, Eduardo Torres Serra, Glória Suzana Gomes de Oliveira, Maria Cecília de Souza Nóbrega   +4 more
doaj   +1 more source

Advancements in wearable heart sounds devices for the monitoring of cardiovascular diseases

SmartMat, Volume 6, Issue 1, February 2025.
This article presents the recent advancements in wearable and flexible heart sound devices, focusing on their mechanics, types of sensors, flexible sensing materials, and prospective denoising techniques. Furthermore, the potential applications of heart sounds for the monitoring of cardiovascular diseases are reviewed as well along with its future ...
Rafi u Shan Ahmad, Muhammad Shehzad Khan, Mohamed Elhousseini Hilal, Bangul Khan, Yuanting Zhang, Bee Luan Khoo   +5 more
wiley   +1 more source

Study on the Unipolar Impulse Aging Characteristics of ZnO Varistors and Their Condition Monitoring Methods

Applied Sciences
Metal-oxide surge arresters (MOSAs) are critical devices for overvoltage protection in power systems, and the aging characteristics of their zinc oxide (ZnO) varistors under impulse and power-frequency voltages exhibit significant differences.
Yongqiang Fan, Wenkai Meng, Xiaoyun Tian, Yonggang Yue, Zhihui Li, Minxin Xu, Xinyan Xiao, Lanjun Yang   +7 more
doaj   +1 more source

Simulation of the Conductive Process of Nano ZnO Varistors Based on Animation Plane Form

Journal of Chemistry, 2020
Among many nano materials and chemical materials, zinc oxide nanomaterials have attracted researchers’ interest because of their high efficiency, low cost, easy preparation, and variable morphology. The purpose of this study is to explore the fabrication
Xin Liu
doaj   +1 more source