Results 11 to 20 of about 345,101 (155)
Gaoya dianqi, 2013 提出一种交流电压下的电声脉冲法空间电荷测试新方法。采用电脉冲作为触发源,利用数字示波器的长存储功能同时获取空间电荷信号和高压交流电压信号,从而避免了传统交流空间电荷测试方法的硬件同步。通过调整脉冲发生器的频率可获取不同相位下的高压交流下的空间电荷响应,并通过平均若干个交流周期的空间电荷信号获得足够信噪比的相位相关的空间电荷信号。通过对低密度聚乙烯工频50 Hz下的空间电荷测量结果表明,在交流电场下,下电极附近区域会形成异号电荷;与传统的交流空间电荷测量系统相比 ...
唐超 +4 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The commercialization of lithium–sulfur batteries (Li–S batteries) has been hindered by the shuttle effect of lithium polysulfides (LiPSs) and sluggish redox kinetics. In this study, we constructed a three‐dimensional hollow conductive network host material for sulfur with synergistic enhancement effects.
Jie Yang +6 more
wiley +1 more source
Gaoya dianqi, 2014 绕击是造成超特高压输电线路雷击跳闸的主要原因,而在绕击事故中,空间电荷的作用不容忽视。为研究空间电荷对雷电绕击输电线路的影响,笔者对150 cm棒—线间隙施加正负操作冲击电压,采用高速摄像系统对放电发展过程进行观测并对外径不同的线电极上的击中次数进行了统计分析,测量了棒对不同外径线电极的预放电电流,采用积分电流法得到线电极周围的空间电荷量,通过ANSYS仿真得到空间电荷对电场的影响。实验结果发现:正操作冲击电压下空间电荷的屏蔽作用对放电击中点的影响较大,而负操作冲击电压下 ...
詹花茂 +4 more
doaj
Electron‐Donating Multifunctional Molecules: A Strategy for High‐Performance Perovskite Solar Cells
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Multifunctional molecules containing electron‐donating groups are critically important in perovskite solar cells (PSCs), including defect passivation, crystallization modulation, energy level alignment, and other functions. This review systematically examines the application and research progress of such multifunctional molecules in PSCs ...
Heng Liu +14 more
wiley +1 more source
Gaoya dianqi, 2014 空间电荷问题是影响变压器油纸绝缘材料耐电强度,导致其绝缘故障的重要因素。针对水分对油纸绝缘电气性能的危害,文中采用基于电声脉冲法的空间电荷测试系统研究了不同水分含量油浸绝缘纸在直流场强20、30、40 k V/mm下的空间电荷特性。结果表明:加压过程中,水分对油浸绝缘纸内部空间电荷分布产生很大影响。油浸绝缘纸试品水分含量越高,其内部积聚的电荷量越少,油纸界面对电荷的阻挡作用也越弱;在油浸绝缘纸试品击穿前,试品内部仅积聚少量的负电荷,空间电荷在两电极间快速导通,是导致油浸绝缘纸试品击穿的主因。
吴高林 +4 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The healing of diabetic chronic wounds is hindered by multiple pathological barriers, including oxidative stress imbalance induced by hyperglycemia, persistent bacterial infection, and impaired neovascular function. This study developed an F127–HA–BiOCl@CeO2 (FHBC) hydrogel dressing with acoustic responsiveness, achieving tissue repair through
Ran Zhao +8 more
wiley +1 more source
Gaoya dianqi, 2019 乙丙橡胶在电缆绝缘中的应用日益广泛,空间电荷积聚成为影响其绝缘性能的关键因素之一。为了明确乙丙橡胶中空间电荷的行为特性及形成机制,文中基于PEA法对乙丙橡胶在直流场强下的空间电荷分布进行了研究,分析并讨论了不同场强下乙丙橡胶内空间电荷的分布规律以及其消散特性。实验结果表明:乙丙橡胶的电荷注入的阈值场强为2.5～5 kV/mm。根据不同场强下乙丙橡胶内空间电荷的行为特性,可将其分为4个阶段,分别为无电极注入阶段、双电极注入阶段、注入电荷迁移复合阶段、阳极注入主导阶段。此外 ...
徐晓晓 +4 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The development of high‐performance, self‐powered ultraviolet photodetectors (UVPDs) is crucial for the practical application of low‐power‐consumption optoelectronic devices. However, achieving both broad‐spectrum detection and high sensitivity remains a challenge.
Ping‐Xian Feng +6 more
wiley +1 more source
Gaoya dianqi, 1996 利用两种实验方法对比测试了预注入单极性空间电荷时,SF6气体极不均匀场间隙正雷电冲击击穿特性。分析表明;直流叠加冲击电压法不适用于观察空间电荷的作用,而切换直流/冲击电压法能有效地反映空间电荷对冲击击穿的作用。
周黎明, 邱毓昌
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Dielectric polymers commonly suffer from severe performance degradation above 150°C, hindering advanced power systems. Herein, we demonstrate a polyetherimide (PEI) nanocomposite that overcomes this by mimicking the gradient architecture of nacre and bamboo, incorporating a continuous vertical gradient of fluorinated boron nitride nanosheets ...
Jian Wang +8 more
wiley +1 more source