Results 31 to 40 of about 6,439 (163)
Rare Metals, EarlyView.ABSTRACT The development of high‐performance and stable electrocatalysts for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) plays a critical role in advancing clean energy technologies, including metal‐air batteries and hydrogen production through overall water splitting.
Chen‐Yu Cai +4 more
wiley +1 more source
CaCu_3Ti_(4+x)O_(12+2x)陶瓷的电学性能 [PDF]
, 2009 采用传统的固相合成方法在1100℃,保温3 h制备了不同Ti含量的CaCu3Ti4+xO12+2x陶瓷(x=-0.5,-0.2,0,0.2,0.5)。通过XRD分析了CCTO的相组成;在-20~100℃温度范围内、500 Hz~1 MHz的频率范围测量了CaCu3Ti4+xO12+2x陶瓷的介电特性和阻抗特性。Ti的化学计量变化明显的影响了CCTO陶瓷的电学性能,系统对比发现Ti的含量偏离CaCu3Ti4O12的化学计量比,会显著的降低CCTO陶瓷的介电常数 ...
熊兆贤, 薛昊
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Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Although magnetic carbon materials possess significant potential in the field of electromagnetic wave absorption (EWA) due to the synergistic effect of multiple attenuation mechanisms, the currently reported magnetic carbon EWA materials face some challenges, such as high cost, low yield, and easy agglomeration of the magnetic component ...
Bo Jiang +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT The central challenge in the development of high‐performance electromagnetic wave‐absorbing materials lies in achieving an optimal balance between impedance matching and attenuation characteristics. This is particularly critical for purely dielectric absorbers, where precise tailoring of the real (ε′) and imaginary (ε″) parts of the complex ...
Zhixiao Wang +7 more
wiley +1 more source
Gaoya dianqi, 2006 采用筛网电极和聚对苯二甲酸乙二醇脂（PET）薄膜作为阻挡介质的介质阻挡放电（DBD）结构在空气中产生大气压辉光放电（APGD）。通过测量空气中APGD的电气特性和发光强度空间的分布特性,比较了它们与丝状DBD的区别: 通过研究APGD的放电特性,分析了空气中APGD的放电机理。实验结果与分析表明,采用该电极结构可以在空气中产生APGD,空气中APGD的放电特性与丝状DBD具有明显的区别,筛网电极起到了在气隙击穿前产生电晕放电对驻极体阻挡介质充电的作用。
方志, 王辉, 邱毓昌
doaj
Preparation and Properties of Porous Mg2SiO4 Ceramics for Wave-Transparent Materials [PDF]
, 2010 透波材料是指能够透过一定频率电磁波的一类功能材料，随着现代战争的需要以及导弹技术的飞速发展，透波材料的应用越来越广泛，要求也愈来愈严格。优良的高频介电性能、稳定的热性能、良好的力学性能和耐环境性能是新型高性能透波材料的研究重点和发展方向。本论文选用低成本、高熔点、低介电的硅酸镁陶瓷做为新型高性能透波材料的研究目标，先采用传统的固相反应法合成制备具有低介电常数的硅酸镁透波陶瓷，研究Mg/Si非化学计量和Ti在B晶格置换改性对陶瓷微结构和介电性能的影响，然后从制备方法探讨凝胶注模成型硅酸镁透波陶瓷的工艺过程，
周明勇
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Rare Metals, Volume 44, Issue 11, Page 8161-8197, November 2025.Graphical abstract AbstractThe studies on the synthesis of two‐dimensional (2D) Janus materials have made significant progress over the years. They offer new opportunities to increase the potential usage of Janus transition metal dichalcogenide (TMDC) materials in different application areas due to their unique structural, electrical, optical and ...
Ayça Coşkun +9 more
wiley +1 more source
Study on Basic Rules of Noncontact Rod-induced Electrospinning [PDF]
, 2017 纳米纤维由于其超高的比表面积和卓越的力学、电学和化学特性在传感、生物医药、能源等领域有着广泛的应用前景和强劲的市场需求。静电纺丝是目前批量化制备纳米纤维的最重要方法之一，针对现有电纺方法存在的如多针尖多管孔电纺技术射流间相互影响，针尖管孔易堵塞；依靠特殊形状电极以及液面扰动的自由液面电纺则存在电极钝化和纤维形貌差异大等缺点，论文提出非接触式棒诱导电纺方法：采用接地诱导棒在聚合物液面近空间移动，强电场作用下靠近诱导棒的液面上出现大量微细射流，诱导棒移开后射流经过拉伸、鞭动和挥发 ...
肖志明
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Implications of Tobacco Use on Pathogen‐Driven Diseases: A Public Health and Policy Perspective
World Medical &Health Policy, Volume 17, Issue 3, Page 468-474, September 2025.ABSTRACT The tobacco epidemic remains one of the most significant global public health challenges, responsible for over 8 million deaths annually, with a substantial portion occurring among non‐smokers exposed to second‐hand smoke. While cigarette smoking remains the most prevalent form of tobacco use worldwide, the rise of electronic nicotine delivery
Nadine Kabbani, James L. Olds
wiley +1 more source
Journal of Linguistic Anthropology, Volume 35, Issue 2, August 2025.Abstract This article argues that social actors' media ideologies about digital interfaces are key to the enregisterment of online activities. Focusing on an online register emergent from user activities around Year, Hare, Affair (YHA)—a state‐aligned Chinese animation—I explore how different metadiscourses evaluate this register by entextualizing ...
Jiarui Sun
wiley +1 more source