Results 31 to 40 of about 13,990 (163)

An integrated cross-scale computational approach for understanding and optimizing continuous-flow extraction of precious metals

Chemical Engineering Journal Advances
The extraction of platinum group metals (PGMs) from secondary resources is essential for sustainable resource cycles, yet process design often relies on empirical methods due to a lack of multiscale understanding.
Xiangguang Bi, Jifan Li, Jianrui Bai, Pengfei Fu, Zejin Yu, Hui Liu, Aoxue Sun, Jun Lu, Junmei Guo, Shan Qing, Xiao Duan   +10 more
doaj   +1 more source

The current induced mass transformation of Ag alloy wire bonded led chip

Journal of Materials Research and Technology
The high input and output (I/O) data exchange, coupled with continuous increase in power density, elevates the risk of bonding interface performance degradation and electromigration (EM) failure during electrical transmission.
Xiaohong Yuan, Qinlian He, Shanju Zheng, Jiaheng Zhang, Dapeng Yang, Qinsong Bi, Yuxi Luo, Dengquan Chen, Xiaojing Wang   +8 more
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Mineralogical features, sequence, and formation conditions of polygenic-polychronous mineralization of the Verkhnetatarskaya gold-bearing area (Yenisei Ridge)

Руды и металлы
Based on results of the field and laboratory studies within the Verkhnetatarskaya gold-bearing area (South Yenisei ore district), four sequentially formed mineral complexes have been distinguished and characterized: 1) gold-quartz (native gold (960 ± 20 ‰
Kryazhev S. G., Dvurechenskaya S. S., Berkovsky E. M., Lizorkin I. M., Starostin I. A.   +4 more
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Synthesis, Photo-Physical Properties, and Electroluminescence Characteristics of Iridium Phosphorescent Materials Based on Different β-Diketonate Ancillary Ligands

Molecules
Organic light-emitting diodes (OLEDs) based on phosphorescent materials are among the most promising technologies for displays and lightings. For red-emitting heteroleptic iridium complexes (HICs), vast and major research has been focused on the design ...
Qiaowen Chang, Ke Zhang, Caixian Yan, Liming Xie, Yuanqiuqiang Yi, Wenming Su, Weiping Liu   +6 more
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Gold-arsenic sulfide mineralization of the Kayancha area, Gorny Altai

Руды и металлы, 2023
Gold-arsenic sulfide type mineralization has first been revealed for the Gorny Altai region. The mineralized zones associate with lamprophyre dikes and are controlled by steeply dipping faults transecting the Vendian-Cambrian terrigenous-carbonate ...
Kryazhev S. G., Dvurechenskaya S. S., Okulov A. V., Fedak S. I.   +3 more
doaj   +1 more source

Insight into fuel injection aging effect on deactivation of PtPd bimetallic supported diesel oxidation catalyst: From engine performance evaluation of monolithic catalysts to microscopic characterization of active species

Fuel Processing Technology
In this study, a comparative experimental study was carried out on DOC catalysts with different aging times (0 h, 40 h, 80 h) by using engine. Emission data were collected through engine testing, and the catalytic behavior of DOC catalysts was analyzed ...
Dezhi Ren, Xin Dai, Jingfang Zhu, Fei Yu, Shunhong Li, Chaoqiang Wang, Jie Yan, Shiying Chang, Dongxia Yang, Yunkun Zhao   +9 more
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Results of geological exploration for diamonds, base and precious metals (DBPM) under the "declaration principle" of the licensing, and specifics of implementation of the principle to primary gold deposits as an example

Руды и металлы
The article presents results of the work for diamonds, base and precious metals, fulfilled in the Russian Federation under the "declaration principle" licenses since the mechanism came into effect.
Alekseev Ya. V., Popov I. V., Kulikov D. A.   +2 more
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Aging hardening characteristic and electrical conductivity of Cu-Cr-Zr-Mo in situ composite

Science and Engineering of Composite Materials, 2016
Cu-0.85Cr-0.5Zr-0.5Mo in situ composite was prepared by continuous casting, cold drawing, and aging treatment. By means of the analysis of microhardness, electrical conductivity, and transmission electron microscopy, the aging characteristics and ...
Wang Song, Zheng Tingting, Xie Ming, Chen Yongtai, Zhang Jiming   +4 more
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Solvent Extraction of Rhodium from Chloride Media: Speciation, Activation, and Separation Mechanisms

Metals
Rhodium is a high-value strategic platinum-group metal extensively applied in automotive exhaust purification, fine chemicals, glass production and high-temperature materials. Restricted by uneven primary resource distribution and volatile market prices,
Xingwang He, Yanan Lu, Xinke Kang, Kuo Liu, Guozhen Wang, Han Yang, Lang Liu, Haigang Dong, Jiachun Zhao, Yong Wang, Chao Wang, Jibiao Han   +11 more
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Synthesis and properties of 0.3%Y2O3/0.3%La2O3/0.3%Al2O3/Cu composite

Science and Engineering of Composite Materials, 2014
The 0.3%Y2O3/0.3%La2O3/0.3%Al2O3/Cu composite was prepared by oxygen and nitrogen atomization spray deposition technique, internal oxidation, and then treated by annealing at different temperatures.
Wang Song, Xie Ming, Zhang Jiming, Chen Yongtai   +3 more
doaj   +1 more source