Results 21 to 30 of about 32,646 (211)
Preparation and Characterization of Sulfur Modified Lithium Iron Silicates as Cathode Materials [PDF]
, 2016 硅酸铁锂作为一种新型的聚阴离子型正极材料，具有原料丰富、结构稳定、理论容量高等优点，有望成为理想的动力电池正极材料。硅酸铁锂完全脱出两个锂离子对应的理论容量高达333mAh/g，但由于第二个锂离子的脱嵌电压过高和体积变化过大，硅酸铁锂只能脱出一个锂离子。硫改性能有效地降低硅酸铁锂的脱嵌电压和结构破坏，从而实现第二个锂离子的脱嵌，因此，有必要探索硫取代硅酸铁锂的合成方法，从而制备出高性能的硫取代硅酸铁锂正极材料。本论文采用溶胶-凝胶和固相烧结法，以硫脲作为硫源 ...
张存皓
core
GIS - Gesto, Imagem e Som - Revista de Antropologia, 2022 “Axé, é o que é” é um ensaio visual que busca apresentar mundos imaginados, vividos, sentidos, chorados e experimentados através do desenho. Esse último, se apresenta como um espaço de diálogo com seres materiais, imateriais, com o que escapa aos olhos, as cores e algumas racionalidades.
openaire +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Metal oxide‐based catalysts for oxygen reduction reaction (ORR) have drawn great attention in recent years. However, it remains technically challenging for the precise regulation of the overall performance due to the trade‐off effect among the activity, selectivity, and stability of electrocatalysts. Herein, a balancing strategy to control the
Haoran Ma +7 more
wiley +1 more source
Effect of Heat-treatment on the Structure and Properties of Iron Containing Silicon Carbide Fibers [PDF]
, 2016 以低分子量聚碳硅烷（Low-molecularweightpolycarbosilane，LPCS）与羰基铁Fe(CO)5为原料制得含铁高聚物，然后与高分子量聚碳硅烷（High-molecularweightpolycarbosilane，HPCS）共混制备含铁聚碳硅烷先驱体（Fe-PCS），经熔融纺丝、氧化交联、裂解最终得到含铁SiC纤维。通过放大合成实验，制备了铁含量（基于先驱体质量）分别为0wt%、1wt%、2wt%的三种含铁SiC纤维，将此三种纤维分别在700oC、900oC ...
陆雪川
core
SE PUBLICAR É PRECISO, AVALIAR TAMBÉM É! [PDF]
Revista de Administração de Empresas, 2018 O tema “revisão de artigos” é relevante e faz parte do cotidiano de todo pesquisador. Entretanto, a minha experiência como editor e revisor em periódicos brasileiros e internacionais torna evidente que o comprometimento dos pesquisadores na função de revisores, em geral, é muito menor do que quando estão na posição de autores.
openaire +2 more sources
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The pre‐existing α‐Fe crystals have important effects on the precipitation and growth of nanocrystals and finally determine the comprehensive soft magnetic properties (SMPs) of the nanocrystalline alloys (NAs). In this work, a high content of Cu elements has been added to Nanomet‐type alloys to enhance the gradient heterogeneity in order to ...
Lei Xie +6 more
wiley +1 more source
A Study on the Impact of Rising Wage on China’s Export [PDF]
, 2016 改革开放以来，我国的外向型经济发展战略取得了举世瞩目的成功。而这一成功很大程度上依赖的却是低端要素禀赋优势所带来的成本优势。但如今，人口结构调整，人口红利逐渐消融，我国出口的成本优势在逐步萎缩，其突出的表现就是工资的持续上涨。我国的出口转型升级迫在眉睫。在这种背景下，深入探析工资上升对出口的影响就具有了非常强的时代性与现实性。 本文采用理论建模、实证估计检验和模拟预测相结合的方式展开分析和研究。其中理论建模是本文分析的基石，在理论模型的指导下，构建出实证模型，并对历史数据进行拟合，检验理论模型的主要结论，
铁瑛
core
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT A comparative study was performed to elucidate the temperature‐dependent corrosion kinetics and the semiconductor/structural characteristics of the passive film formed on Fe40Ni7Cr17Mo12C13B9Y2 (at%) amorphous alloy coatings. The results indicate that increasing temperature accelerates the corrosion kinetics of the coating.
Yang Lv +12 more
wiley +1 more source
血清铁自动分析法试剂盒的研制与评价:Nitro-PAPS直接光度法
Zhongguo shiyan zhenduanxue, 2007 目的研制、评价血清铁Nitro-PAPS自动分析法试剂盒。方法在表面活性剂存在下,用2-（5-硝基-2-吡啶偶氮）-5-[N-正丙基-N-（3-磺酸丙基）氨基]苯酚二钠（Nitro-PAPS）作显色剂双试剂两点终点法测定血清铁。结果该方法显色络合物最大吸收波长为591 nm,线性范围达85μmol/L,表观摩尔吸光数为1.11×105L.mol-1.cm-1,回收率为98.5%-104.1%,批内变异系数（CV）和批间变异系数分别为0.021和0.035,与原子吸收分光光度法（AAS）比较相关良好,Y ...
王贤俊, 杨秀勤, 马连学
doaj
Gaoya dianqi, 2023 基于铁心本体的振动信号更能准确反映铁心状态，针对典型的电力变压器铁心结构，利用测振仪及声学成像系统对一台三相三柱式铁心模型开展振动及分布特性研究。实验结果表明：铁心振动以100 Hz为基频，包含整数倍高次倍频分量。铁心不同方向不同位置振动差异较大，硅钢片平面法向振动强于平面内振动。铁心B柱振动大于A、C柱，铁心柱与上下铁轭接缝处振动较大，沿铁心柱及上下铁轭振动呈近似“U”型分布，且电压越大，趋势越明显。铁心辐射声场云图及声像图均表明铁心B柱与上下铁轭接缝处的辐射噪声贡献远大于其他位置 ...
纪炜 +4 more
doaj