Results 11 to 20 of about 11,612,362 (357)

Physicochemical properties of the heterogeneous system Li2CO3-Na2CO3-K2CO3/MgO [PDF]

open access: yesJournal of the Serbian Chemical Society, 2023
The structure, conductivity, melting points and caloric melting effects of the (Li2CO3–Na2CO3–K2CO3)eut melt/MgO nanopowder heterogeneous system with MgO concentration up to 70 vol. % have been investigated. A wide variety of methods (DSC, XRD, BET, high
Zakiryanova Irina D.   +2 more
doaj   +1 more source

Thermohaline structure and circulation beneath the Langhovde Glacier ice shelf in East Antarctica

open access: yesNature Communications, 2021
Basal melting of ice shelves is the principal driver of recent ice mass loss in Antarctica. The study reports comprehensive structures of temperature, salinity and current under an ice shelf in East Antarctica obtained by borehole measurements.
Masahiro Minowa   +4 more
doaj   +1 more source

Chemical stability aspects of BaCe0.7–xFexZr0.2Y0.1O3–δ mixed ionic-electronic conductors as promising electrodes for protonic ceramic fuel cells

open access: yesChimica Techno Acta, 2023
Mixed ion-electron conductors (MIECs) are promising materials for air electrodes for protonic ceramic fuel cells (PCFCs) or oxygen permeation membranes.
Liana Tarutina   +5 more
doaj   +1 more source

Ceramic materials based on lanthanum zirconate for the bone augmentation purposes: materials science approach

open access: yesChimica Techno Acta, 2022
The creation of new non-toxic materials that combines high osteointegration and strength characteristics is an urgent contemporary challenge. The use of complex oxides, such as lanthanum zirconate (La2Zr2O7), as non-reservable alloplastic implant ...
Nataliia Tarasova   +4 more
doaj   +1 more source

Nonlinear two-level dynamics of quantum time crystals

open access: yesNature Communications, 2022
Recent work has reported a realization of a time crystal in the form of the Bose-Einstein condensate of magnons in superfluid 3He. Here, the authors study the dynamics of a pair of such quantum time crystals and show that it closely resembles the ...
S. Autti   +6 more
doaj   +1 more source

Novel Nb5+-doped hexagonal perovskite Ba5In2Al2ZrO13 (structure, hydration, electrical conductivity)

open access: yesChimica Techno Acta, 2022
The new phase Ba5In2Al2Zr0.9Nb0.1O13.05 with hexagonal perovskite structure was obtained. The substitution of Zr4+ by smaller Nb5+ was accompanied by the incorporation of the oxygen interstitials and did not lead to a significant change in the lattice ...
Roman D. Andreev   +3 more
doaj   +1 more source

Modelling the Radical Chemistry on Ice Surfaces: An Integrated Quantum Chemical and Experimental Approach

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Heterogeneous radical processes on ice surfaces play a vital role in the formation of building blocks of the biologically relevant molecules in space. Therefore, quantitative mechanistic details of the radical binding and radical reactions on ices are ...
W. M. C. Sameera   +9 more
doaj   +1 more source

Electroreduction of silicon from the NaI–KI–K2SiF6 melt for lithium-ion power sources

open access: yesChimica Techno Acta, 2022
Silicon and silicon-based materials are increasingly used in microelectronics, metallurgy and power generation. To date the active study aimed at the development of silicon materials to be used in devices for solar energy conversion, accumulation and ...
Rayana K. Abdurakhimova   +5 more
doaj   +1 more source

Borated graphite cathodes for low-temperature aluminum electrolysis

open access: yesChimica Techno Acta, 2022
Electrochemical boriding of the graphite plates in the potassium cryolite based electrolytes was studied. The boriding were carried out in a cell with vertical electrodes. The procedure included 2 stages: 1) electrolysis in the KF–AlF3–KBF4 melt (CR=1.3)
A. V. Rudenko   +3 more
doaj   +1 more source

Manipulating the grain boundary properties of BaCeO3-based ceramic materials through sintering additives introduction

open access: yesChimica Techno Acta, 2019
BaCeO3-based materials represent a well-known family of proton-conducting electrolytes, which can be used in different solid oxide electrochemical devices.
Gennady Vdovin   +5 more
doaj   +1 more source

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