Results 31 to 40 of about 734,317 (337)

Removal and Recycling of Antimony in a Gold Concentrate

open access: yesKuangchan zonghe liyong
In this article, antimony was removed from the gold concentratebythe alkali leaching method, and then the recovery of antimony solution was also studied.
Jinquan GUO   +5 more
doaj   +1 more source

Ultralow-loading platinum-cobalt fuel cell catalysts derived from imidazolate frameworks

open access: yesScience, 2018
Combine and conquer Platinum (Pt)–group metals, which are scarce and expensive, are used for the demanding oxygen reduction reaction (ORR) in hydrogen fuel cells.
L. Chong   +9 more
semanticscholar   +1 more source

Review on recovery of valuable metals from complex copper–cobalt co-associated mines

open access: yes工程科学学报
Copper and cobalt, both strategic metals, play an indispensable role in many fields, such as national infrastructure and defense science and technology. Copper, one of the earliest nonferrous metals discovered, extracted, and applied by humans, teams up ...
Xiang LI   +5 more
doaj   +1 more source

Dermal and inhalable cobalt exposure-Uptake of cobalt for workers at Swedish hard metal plants.

open access: yesPLoS ONE, 2020
PurposeCobalt exposure is known to cause adverse effects on health. A major use of cobalt is in the manufacture of hard metal. Exposure can lead to asthma, hard metal lung disease, contact allergy and increased risk of cancer.
Fredrik Wahlqvist   +4 more
doaj   +1 more source

The mathematical description of the electrosynthesis of composites of oxy-hydroxycompounds cobalt with polypyrrole overooxidazed [PDF]

open access: yes, 2016
The electrosynthesis of the composite with of the overoxidized polypyrrole with cobalt oxy-hydroxide in strongly acidic media has been described mathematically, using linear stability theory and bifurcation analysis. The steadystates stability conditions
Maia, J.   +5 more
core   +2 more sources

Bifunctional earth-abundant phosphate/phosphide catalysts prepared via atomic layer deposition for electrocatalytic water splitting [PDF]

open access: yes, 2019
The development of active and stable earth-abundant catalysts for hydrogen and oxygen evolution is one of the requirements for successful production of solar fuels.
Dendooven, Jolien   +7 more
core   +2 more sources

Preparation and Characterization of Biomedical Ni-Co-Al Shape Memory Alloys [PDF]

open access: yesEngineering and Technology Journal, 2016
This research presents microstructural characterization of the CoNi Al shape memory alloy with focus on understanding the significant properties as well as the relation between the physical properties and microstructure of this alloy.
Emad S. Al-Hassani   +2 more
doaj   +1 more source

An in situ XAS study of the cobalt rhenium catalyst for ammonia synthesis [PDF]

open access: yes, 2018
A cobalt rhenium catalyst active for ammonia synthesis at 400 °C and ambient pressure was studied using in situ XAS to elucidate the reducibility and local environment of the two metals during reaction conditions.
Granlund Kirste, Karsten   +6 more
core   +3 more sources

Enhanced Gamma Radiation Shielding Using Epoxy Quartz Fabric Composites Reinforced With CoCl2 Microparticles

open access: yesAdvanced Engineering Materials, EarlyView.
The growing demand for lightweight, nontoxic, and multifunctional gamma shielding materials has intensified efforts to find alternatives to conventional lead and aluminum‐based protectants. In this work, we develop epoxy quartz fabric composites reinforced with cobalt chloride (CoCl2) microparticles, fabricated via hand lay‐up with varying filler ...
Summan Urooge   +7 more
wiley   +1 more source

Temperature dependence of spin resonance in cobalt substituted NiZnCu ferrites

open access: yes, 2010
Cobalt substitutions were investigated in Ni0.4Zn0.4Cu0.2Fe2O4 ferrites, initial complex permeability was then measured from 1 MHz to 1 GHz. It appears that cobalt substitution led to a decrease in the permeability and an increase in the \mus\timesfr ...
Labouré, Eric   +3 more
core   +5 more sources

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