Results 51 to 60 of about 344,482 (299)

Mechanochemically assisted hydrothermal synthesis of Sn-substituted MFI-type silicates

open access: yesScience and Technology of Advanced Materials, 2018
Substitution of Al atoms in a zeolite framework by catalytic metal atoms has attracted considerable attention because the catalytic behavior can be tuned by the substituted atoms.
Kiyoshi Kanie   +6 more
doaj   +1 more source

First Deployment and Validation of in Situ Silicate Electrochemical Sensor in Seawater

open access: yesFrontiers in Marine Science, 2018
An electrochemical sensor is proposed to measure silicate concentration, in situ, in the ocean without any addition of liquid reagent. From the analytical principle to the laboratory prototype toward the first in situ, immersible sensor, the evolution of
Carole Barus   +16 more
doaj   +1 more source

Microclimate and health properties of autoclaved building materials in the context of their modification [PDF]

open access: yesBiuletyn Wojskowej Akademii Technicznej, 2018
The construction industry in a special way affects the condition of the state of the environment and human. It is necessary to search for materials with the lowest degree of risk to humans.
Anna Stępień   +2 more
doaj   +1 more source

A Tale of Three Galaxies: Anomalous Dust Properties in IRASF10398+1455, IRASF21013-0739 and SDSSJ0808+3948

open access: yes, 2014
On a galactic scale the 9.7um silicate emission is usually only seen in type 1 active galactic nuclei (AGNs). They usually also display a flat emission continuum at ~5--8um and the absence of polycyclic aromatic hydrocarbon (PAH) emission bands.
Hao, Lei, Li, Aigen, Xie, Yanxia
core   +1 more source

Grain growth in newly discovered young eruptive stars

open access: yes, 2020
FU Orionis-type stars are young stellar objects showing large outbursts due to highly enhanced accretion from the circumstellar disk onto the protostar.
Carmona, A.   +6 more
core   +3 more sources

The fluxing effect of fluorine at magmatic temperatures (600-800 °C): A scanning calorimetric study [PDF]

open access: yes, 1992
The effect of F on the glass transition behavior of albite, diopside, and four other silicate melts has been investigated using scanning calorimetry. The addition of F to all silicate melts investigated results in a strong, nonlinear decrease of the ...
Dingwell, Donald B., Webb, Sharon L.
core   +1 more source

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

open access: yesAdvanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm   +5 more
wiley   +1 more source

Investigation of Thermo‐Chemical Processes in Commercial MgO‐C Refractory Bricks With and Without MgO‐C Recyclate at Elevated Temperatures

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates thermo‐chemical processes during high‐temperature testing of two commercial MgO‐C brick grades, one containing 47.5 wt.% MgO‐C recyclate. Using ETV, DTA/TG‐MS, XRD, and SEM/EDS/EBSD, mechanisms such as carbothermal reduction of magnesia, impurity incorporation into the secondary MgO surface layer, and calcium‐rich phase ...
Alexander Schramm   +6 more
wiley   +1 more source

Combustion Synthesis of Nanocrystalline Ba1.3Ca0.7SiO4 Semiconductors Using Urea as an Energy Efficient Fuel

open access: yesInorganics, 2023
The τ-phase Ba1.3Ca0.7SiO4 alkaline earth silicate powders were synthesized using the solution combustion technique. For this purpose, metal nitrate–urea mixtures were used as an oxidant and a fuel.
Desta R. Golja   +3 more
doaj   +1 more source

Seed particle formation for silicate dust condensation by SiO nucleation [PDF]

open access: yes, 2013
Clustering of the abundant SiO molecules has been discussed as a possible mechanism of seed particle formation for silicate dust in stellar outflows with an oxygen rich element mixture.
Gail, H. -P.   +3 more
core   +1 more source

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