Results 21 to 30 of about 868,001 (185)
Gaoya dianqi, 2017 导电微粒污染是直流GIL绝缘强度劣化的重要影响因素,为研究其对柱式绝缘子表面电荷积聚的影响,文中搭建了考虑导电微粒情况的电荷测量平台。首先探究了绝缘子表面电荷积聚的时间效应,并在此基础上进一步研究了微粒附着位置、微粒长度、微粒直径对表面电荷积聚的影响。结果表明:附着绝缘子表面的导电微粒可引起表面电荷的积聚激增,其中与电极接触的微粒引起的电荷激增量更为显著;随微粒长度增加,微粒引起电荷积聚增强,而微粒直径对电荷积聚的影响并没有明显的线性规律;与正电荷相比,负电荷更易发生积聚。
李伯涛 +5 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The Janus structure of ZnIn2S4 (ZIS) endows it with an intrinsic built‐in electric field that effectively drives photogenerated charge separation. However, this very structure also renders the predominant (001) facet (In–S termination) catalytically inert due to its low electron density and high energy barrier for the hydrogen evolution ...
Qingao Zhou +8 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Aqueous zinc‐ion batteries are plagued by anode challenges such as dendrite growth and corrosion, which stem from intrinsic surface heterogeneity. Although constructing a homogeneous interfacial layer is a promising strategy, conventional electrolyte additives often suffer from incomplete or unstable coverage.
Ke Huang +6 more
wiley +1 more source
Gaoya dianqi, 1994 阐述GIS中支撑绝缘子表面电荷积聚对沿面闪络特性的影响及其闪络机理,分析表面电荷的来源及影响电荷积聚的因素,并介绍利用电容探头测量绝缘子表面电荷分布的方法.
刘志民, 邱毓昌
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Water electrolysis is a promising method for green hydrogen production, but slow hydrogen evolution reaction (HER) kinetics require efficient catalysts. In this study, we develop a Ni3S2/MoS2 heterostructure electrocatalyst using a work‐function‐driven electronic modulation strategy combined with a self‐sacrificial template approach.
Xinxin Zhao +11 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The protracted incubation time has long been the Achilles' heel of the promising 2LiBH4–MgH2 hydrogen storage system. Instead of the usual route‐creating heterogeneous nucleation sites to hasten MgB2 formation, we shortened both de‐ and re‐hydrogenation incubation periods by steering the Mg transformation itself.
Kai Jia +6 more
wiley +1 more source
Dianci bileiqi, 1993 据美国《IEEE Trans.Elec.Insul.》杂志报道。对在SF6气体中表面电荷对绝缘子冲击闪络的影响进行了研究。由电晕放电电源使绝缘子表面产生线性分布或均匀分布的多极性电荷,或者具有相邻电极（同号电荷）或相反电极（混合电荷）的双极电荷。拥有分裂电极的试验装置借助电容式探测器可以测定整个绝缘子的表面。研究得出了如下结论:使阴极电场增大的表面电荷分布对在SF6气体中的绝缘子表面的冲击闪络有重大影响;当均勺分布或线性分布的正极性电荷的密度大于25μC/m～2时,表面冲击放电强度减小 ...
西丁
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Gaoya dianqi, 2020 电晕放电是高压直流输变电工程运行和设计中重点关注的问题,其产生的空间电荷在直流电场的作用下积聚到设备绝缘表面上,引起绝缘表面局部电场畸变,降低设备的绝缘性能,目前尚无有效的数值方法考虑空间电荷对绝缘表面电场强度的附加影响。针对直流负极性球——板电晕放电,搭建了直流电晕下绝缘材料表面电荷测量试验平台,该试验平台采用了有源静电探头法的测量原理,选取了3种不同绝缘材料的圆形薄片和2种不同曲率的伞形圆盘作为试验的测量对象,测量其在负极性球——板电晕放电下绝缘表面各点的电位分布 ...
易凡, 杜志叶, 黄从鹏, 金颀
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Gaoya dianqi, 2022 环氧树脂材料在电场作用下会出现表面电荷积聚现象导致沿面放电。为改善环氧树脂材料的直流绝缘性能，文中对环氧树脂试品表面进行局部粗糙度处理，开展闪络实验，探究局部粗糙度处理在空气、C4F7N/CO2混合气体和SF63种气体环境中对环氧树脂试样闪络特性的影响。建立二维仿真模型，通过有限元法分析局部粗糙度处理后环氧树脂材料的表面电荷特性以及陷阱分布。根据闪络实验结果，粗糙面位置不同的环氧树脂试品的沿面闪络电压在3种气体中均随表面粗糙度的增加呈现先上升后下降的趋势，并在粗糙面位于中心且表面粗糙度为1.3 ...
律方成 +5 more
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The stability of aqueous Zn2+ batteries is severely hindered by parasitic reactions at the Zn anode/electrolyte interface. Herein, itaconic acid (IA) is introduced as an effective electrolyte additive to achieve a highly stable zinc anode. Remarkably, IA concurrently modulates both the zinc anode/electrolyte interfacial structure and the Zn2 ...
Chenggang Wang +5 more
wiley +1 more source