Results 11 to 20 of about 4,137,519 (152)
, 2005 采用添加表面活性剂两步沉淀法制备了具有高表面铜相对浓度的超细甲醇合成催化剂：以组成为H2／CO／CO2／N2=66／27／3／4（体积比）的原料气对催化剂进行了活性评价。结果表明，该催化剂比传统并流沉淀法制备的铜基催化剂活性提高47．9％．比两步沉淀法和添加表面活性剂并流沉淀法制备的铜基催化剂活性分别提高9．3％和16．8％。利用SEM、XRD及XPS方法对催化剂的结构 ...
王铁军 +4 more
core +2 more sources
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Soft‐magnetic materials (SMMs) are indispensable for electrification and sustainable energy systems, yet their inherent mechanical fragility fundamentally limits applications under severe mechanical stresses. Enhancing the yield strength of SMMs is essential to prevent the degradation in magnetic performance and failure from plastic ...
Nairan Wang +6 more
wiley +1 more source
High‐Value Targeted Conversion of Copper Slag as LiFePO4 Material for Lithium‐Ion Batteries
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The massive stockpiling of copper slag (CS) presents severe environmental and resource‐waste challenges. Existing strategies for CS valorization typically yield low‐value‐added products. Herein, we propose an innovative hierarchical regulation approach to transform CS into high‐performance LiFePO4 (LFP) cathode materials.
Yuyun Li +5 more
wiley +1 more source
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
The Microstructure Evolution and Mechanical Properties of (FeCoCrNi)100‐x(AlCu)x High‐Entropy Alloys
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT This study systematically investigates the effects of AlCu addition on the microstructural evolution and mechanical properties of (FeCoCrNi)100‐x(AlCu)x (x = 0, 5, 10, 15, 20; at%) high‐entropy alloys (HEAs). The results reveal that the microstructure evolves from coarse equiaxed to refined equiaxed, dendritic, and ultimately dual‐phase ...
Shunfu Xie +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The polyanionic compound Na3V2(PO4)3 (NVP) has emerged as a competitive cathode material for sodium‐ion batteries (SIBs), owing to its high‐voltage redox activity (3.4 V vs. the Na+/Na reference couple) and NASICON‐type framework that enables superior ionic conductivity.
Xiaolei Wu +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The similar physicochemical properties of alkali metal elements make the co‐enrichment and precise separation of Cs+ and Rb+ in complex brine systems highly challenging. Here, an all‐inorganic strategy is proposed, which achieves efficient enrichment and precise separation of Cs+ and Rb+ in high‐salt systems by constructing Sr2+/Ba2+‐based ...
Kang Li, Ruixin Ma, Shina Li
wiley +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Enhancing the strength of 7000 series high‐strength Al alloys remains a critical challenge to meet the demands of increasingly demanding service environments. In this study, a novel approach is proposed for developing high‐performance Al alloys through a combination of powder mechanical alloying, powder press‐forming, rolling deformation, and ...
Peng‐Fei Ji +4 more
wiley +1 more source
, 2004 采用传统共沉淀法和加表面活性剂改进共沉淀法制备了两种超细Cu／ZnO／Al2O3催化剂，并应用XRD，TEM对催化剂的结构和形貌进行了表征，同时用流动固定床微型反应器在3．0MPa和体积空速7600h^-1下考察了其催化合成气合成甲醇的活性．结果表明，改进共沉淀法制备的超细Cu／ZnO／Al2O3催化剂具有比传统共沉淀法制备的催化剂更细的粒径和更高的催化活性 ...
常杰, 阴秀丽, 付严, 汪俊锋
core +1 more source
洞穴水Ca2+,Mg2+含量特征及其对次生化学沉积物发育影响--以重庆武隆芙蓉洞为例
Shuitu Baochi Xuebao, 2006 洞穴水Ca^2＋，Mg^2＋含量及其变化量是洞穴次生化学沉积物发育程度的最直接和最基础的反演载体。通过对芙蓉洞地表水、基岩水及洞穴水进行采样对比分析认为：（1）芙蓉洞洞穴水Ca^2＋，Mg^2＋含量总体变化不大，Ca^2＋离子含量为44～52mg／L．Mg^2＋离子含量为32～45mg／L。洞穴次生化学沉积物的主要物质来源是Ca^2＋离子．正处于Ca^2＋离子沉淀较为完全，而Mg^2＋离子还没来得及甚至没有开始沉淀阶段。（2）碳酸盐岩地区次生化学沉积物Ca^2＋／Mg^2 ...
陈桥 +5 more
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