Results 11 to 20 of about 111,417 (297)

SiC synthesis using natural Mg-silicates [PDF]

open access: yesScience of Sintering, 2012
The silicon carbide powders are prepared by carbothermal reduction of domestic mineral resources (white and brown sepiolite), at relatively low temperatures (1200 - 1600oC).
Devečerski A.   +5 more
doaj   +1 more source

Biosilicification Drives a Decline of Dissolved Si in the Oceans through Geologic Time

open access: yesFrontiers in Marine Science, 2017
Biosilicification has driven variation in the global Si cycle over geologic time. The evolution of different eukaryotic lineages that convert dissolved Si (DSi) into mineralized structures (higher plants, siliceous sponges, radiolarians, and diatoms) has
Daniel J. Conley   +10 more
doaj   +1 more source

A multicomponent model of the infrared emission from Comet Halley [PDF]

open access: yes, 1988
A model based on a mixture of coated silicates and amorphous carbon grains produces a good spectral match to the available Halley data and is consistent with the compositional and morphological information derived from interplanetary dust particle ...
Allamandola, Louis J.   +4 more
core   +2 more sources

EVALUATION OF FLEXURAL RIGIDITY OF COTTON FABRICS TREATED WITH POLIURETHANE AND ACRILYC RESIN AND MONTMORILLONITE PARTICLES [PDF]

open access: yesAnnals of the University of Oradea: Fascicle of Textiles, Leatherwork, 2020
Textile manufacturers are demonstrating an increasing interest in the application of different types of micro or nanoparticles in order to add new properties to the fabric.
CARETTE Margaux   +4 more
doaj  

Utilization of 29Si MAS-NMR to Understand Solid State Diffusion in Energy Storage Materials

open access: yesFrontiers in Chemical Engineering, 2022
The properties of many solid-state materials arise from critical interfaces tied to the structure, morphology, and composition of the materials under study.
Fulya Dogan, Baris Key, John T. Vaughey
doaj   +1 more source

Spectroscopic diagnostic for the mineralogy of large dust grains [PDF]

open access: yes, 2003
We examine the thermal infrared spectra of large dust grains of different chemical composition and mineralogy. Strong resonances in the optical properties result in detectable spectral structure even when the grain is much larger than the wavelength at ...
Artymowicz   +17 more
core   +3 more sources

On the plasticity of Si-O framawork of alkali zinc silicates [PDF]

open access: yes, 1997
The configuration of the Si-O framework in alkali zinc silicates has been investigated on the basis of recently determined structures. The results have shown that there is a linear correlation between the ionic radii of alkali ions and the molar ...
Kawahara, Akira, Kohara, Shizuo
core   +1 more source

Effect of Three Commonly Consumed Beverages on Surface Roughness of Polished and Glazed Zirconia-Reinforced Lithium Silicate Glass Ceramics

open access: yesFrontiers in Dentistry, 2019
Objectives: This study aimed to assess the effect of three commonly consumed beverages on surface roughness of polished and glazed zirconia-reinforced lithium silicate (ZLS) glass ceramics.
Farnaz Firouz   +5 more
doaj   +1 more source

Calcium silicates synthesised from industrial residues with the ability for CO2 sequestration [PDF]

open access: yes, 2014
This work explored several synthesis routes to obtain calcium silicates from different calcium-rich and silica-rich industrial residues. Larnite, wollastonite and calcium silicate chloride were successfully synthesised with moderate heat treatments below
Esquivias Fedriani, Luis María   +4 more
core   +1 more source

Optimization of the structure and properties of foam-glass ceramics

open access: yesИнженерно-строительный журнал, 2019
The basic properties of foam-glass ceramics — a porous inorganic material are optimized in the study. This material is used for thermal insulation of various engineering structures: foundations of buildings, roads and railways, pipelines, etc.
Konstantin Ivanov
doaj   +1 more source

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