Results 111 to 120 of about 614 (173)

Assembly and Interconnection Technologies for 3D Plastic Circuit Carriers: An Overview of Technologies, Materials, and Applications. [PDF]

Micromachines (Basel)
Werum K, Eberhardt W, Reenaers D, Mager T, Endl M, Zimmermann A, Deferme W.   +6 more
europepmc   +1 more source

Geopolymer-Based Stabilization of Heavy Metals, the Role of Chemical Agents in Encapsulation and Adsorption: Review. [PDF]

Polymers (Basel)
Genua F, Lancellotti I, Leonelli C.
europepmc   +1 more source

Hexaamminecobalt(III) Chromate and Dichromate as Precursors of Nanoscale Spinels Co(Co_1-xCr_x)₂O₄ (<i>x</i> = 0.75; 0.90; 1). [PDF]

Int J Mol Sci
Filatov E, Tarasova P, Sinitsa V, Kostin G, Kuratieva N, Plyusnin P, Korenev S.   +6 more
europepmc   +1 more source

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Synthesis of copper chromite catalyst

Aerospace Science and Technology, 2004
Abstract Copper chromite (CuCr 2 O 4 ) catalysts were prepared by ceramic and coprecipitation methods and characterized by X-ray diffraction, scanning electron microscopy (SEM), elemental, differential calorimetric (DSC), thermogravimetric and granulometric analysis, mass spectroscopy and infrared spectroscopy (IR).
Aparecida M. Kawamoto, Luiz Claudio Pardini, Luis Claudio Rezende   +2 more
exaly   +2 more sources

Mechanistic features of reduction of copper chromite and state of absorbed hydrogen in the structure of reduced copper chromite

Russian Journal of General Chemistry, 2008
The review discusses the experimental data on the unusual mechanism of the reduction of copper cations from the copper chromite, CuCr2O4, structure. Treatment of copper chromite in hydrogen at 180–370°C is not accompanied by water formation but leads to absorption of hydrogen by the oxide structure with simultaneous formation of metallic copper as ...
Vladimir I Zaikovskii, Yurii A Chesalov, L M Plyasova   +2 more
exaly   +2 more sources

Novel microwave synthesis of copper chromite nanoparticles

Inorganic Chemistry Communication, 2021
Abstract Here, a novel microwave synthesis method has been used to prepare copper chromite nanoparticles. Effect of capping agents viz; citric acid, oleic acid, coconut oil, and urea on crystal structure and size of copper chromite nanoparticles (CuCr2O4 NPs) are presented.
Pawan K Khanna
exaly   +2 more sources

Ethanol dehydrogenation to ethyl acetate by using copper and copper chromite catalysts

Chemical Engineering Journal, 2012
Abstract In the recent years, the interest in the ethanol production from renewable natural sources, as a possible alternative energy vector, has strongly grown in the world. The low-cost ethanol availability has also favored the study of the production of different chemicals such as ethylene, ethyl ether, acetaldehyde and ethyl acetate starting from
Riccardo Tesser, Martino Di Serio, E Santacesaria   +2 more
exaly   +3 more sources

The nature of hydrogen stabilization in the reduced copper chromites

Journal of Molecular Catalysis A, 1996
Abstract In situ powder X-ray and neutron diffraction showed that copper chromite retains its spinel structure (space group Fd3m, a = 8.348(3) A ) in hydrogen at 320°C. The spinel has a copper ion deficiency and is stabilized by the dissolved hydrogen.
L.M. Plyasova, L.P. Solovyeva, T.A. Krieger, O.V. Makarova, T.M. Yurieva   +4 more
exaly   +2 more sources

Moderate-temperature reduction of copper chromite by hydrogen and hydrogen desorption from the surface of reduced chromite

Kinetics and Catalysis, 2000
The reduction of copper chromite CuCr2O4 by hydrogen at 300–573 K and a hydrogen pressure of 4×104-8 × 104 104 Pa and hydrogen desorption from the surface of a reduced sample are studied. The rate of copper chromite reduction becomes high at temperatures above 473 K.
Irina I Simentsova
exaly   +2 more sources