Results 11 to 20 of about 9,878 (165)
Rare Metals, EarlyView.ABSTRACT This study developed a FeSiAl@LMPGP composite material to address the demand for low‐frequency electromagnetic absorption. Through controllable heat treatment, FeSiAl particles and PbO nanoparticles self‐assembled into a high‐density Mott–Schottky heterointerface structure, which exhibited a significant built‐in electric field (BIEF) effect ...
Yuqi Wang +5 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT The development of high‐performance electromagnetic protection materials integrating broadband absorption and effective shielding capabilities is hindered by challenges in simultaneously optimizing multiple electromagnetic properties through conventional material designs.
Changlong Du +9 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
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Rare Metals, EarlyView.ABSTRACT Fluxgate sensors with Co‐rich amorphous microwires, widely used for their low noise in magnetic field measurements, encounter significant challenges in high‐temperature environments such as well drilling and geological exploration. Prolonged thermal aging degrades the performance of Co‐rich amorphous microwires, resulting in increased noise ...
Lining Pan +10 more
wiley +1 more source
The Preparation of Diffusion Barrier Layer and Investigation of the Thermal Stability in Cu Interconnect Technology [PDF]
, 2016 随着集成电路的集成度越来越高，第一代Al互连材料由于较差的抗电迁移能力，已不能满足高性能互连材料的要求。Cu比Al具有更低的电阻率、更好的抗电迁移能力，因此，Cu取代Al成为新一代互连材料。然而，Cu互连线在较低温度下会与半导体Si元器件发生互扩散而生成Cu-Si化合物，导致电阻急剧上升，这会严重影响Cu互连线的稳定性与可靠性。为了提高Cu互连线的热稳定性，本研究选择熔点较高且在Cu中溶解度较低的金属V和Ta作为阻挡层材料；同时，通过在Cu中掺杂电阻率较低的Al元素制备得到Cu-Al合金薄膜 ...
戴拖
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Dual‐Stage Heat Treatment for Enhanced Hydrogen Storage Properties of Mg−Ni−Y Alloys
Rare Metals, EarlyView.ABSTRACT Mg−Ni−Y alloy is considered to be one of the most promising hydrogen storage materials, but its high dehydrogenation energy barrier hinders its practical application. A dual‐stage heat treatment (490°C × 4 h + 550°C × 4 h) is applied to optimize the microstructure and hydrogen storage performance of a vacuum‐melted Mg94Ni3Y3 alloy.
You Lv +6 more
wiley +1 more source
Investigation of oxygen precipitates and copper complex in Czochralski silicon [PDF]
, 2015 用直拉法生长的单晶硅中，氧是最常见的杂质，硅材料制备过程使用的内吸杂工艺则是以氧沉淀及其诱生缺陷为基础。铜作为最常见的过渡族金属玷污之一，其沉淀及复合体将会较大程度地影响硅材料的性能。因此，研究氧沉淀和铜沉淀及其复合体在直拉硅单晶中的行为，除了具有重要的理论意义外，在实际生产中也可以提高硅器件的性能。本论文利用光学显微镜，傅立叶红外光谱仪及荧光光谱仪对不同热处理方式下硅中氧和铜的行为进行研究，得出的主要结论如下： （1）研究了线性升温（Ramping）的起始温度和升温速率对硅单晶中氧沉淀行为的影响 ...
谢婷婷
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Rare Metals, EarlyView.ABSTRACT Low conductivity, slow ion‐diffusion, and limited reactive sites are common problems in electrocatalysts and electrode materials. In this study, a complex NiTe–CoTe heterojunction with abundant Te vacancies embedded in N, P, and F co‐doped hollow carbon nanorods (NiTe1−x–CoTe1−x/NPFC) was fabricated via a simple ionic liquid‐assisted ...
Mingjie Yi +7 more
wiley +1 more source
Dianci bileiqi, 1997 主要研究了铁系氧化锌压教电阻热处理工艺对其大电流性能的影响，同时对热处理的温度以及热处理效果与烧结过程的关系进行了研究，介绍了两个特殊的温区，并对热处理的机理进行了简单的讨论。
王建文, 杨明, 郭亚平
doaj
Effects of Silica on Phase Transformation and Microstructure of Sol-Gel Derived Zirconia Fibers [PDF]
, 2015 本论文以氧化锆溶胶和二氧化硅溶胶为原料，采用溶胶凝胶法制备了不同二氧化硅含量的氧化锆陶瓷纤维。其中氧化锆溶胶采用氧氯化锆和过氧化氢反应合成，二氧化硅溶胶由实验室自制得到。采用29SiNMR、XRD、FTIR、SEM、TEM、TG-DTA等技术系统地研究了SiO2和Y2O3对溶胶凝胶法制备的ZrO2纤维相变和微观组织的影响。 研究发现，氧化锆溶胶中主要是以“Zr-O-Zr”长链结构形式存在，从而形成可纺性的溶胶。在纯氧化锆纤维中加入二氧化硅后，稳定了氧化锆的四方相，从而避免形成“皮芯结构”的纤维 ...
蔡武集
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