Results 31 to 40 of about 381,696 (284)
The Astrophysical Journal, 2013 Amorphous, astrophysically relevant silicates were prepared by laser ablation of siliceous targets and subsequent quenching of the evaporated atoms and clusters in a helium/oxygen gas atmosphere. The described gas-phase condensation method can be used to synthesize homogeneous and astrophysically relevant silicates with different compositions ranging ...
Sabri, T. +6 more
openaire +2 more sources
Direct observation of crystallization of amorphous Mg-bearing silicate grains into Mg
, 2005 The crystallization of amorphous Mg-bearing silicate grains into Mg2SiO4 and its temperature dependence were clarified by observing the grains in situ while heating in a transmission electron microscope. The crystallization started from the grain surface
K. Kamitsuji +3 more
core +1 more source
High-Q bismuth silicate nonlinear glass microsphere resonators [PDF]
, 2012 The fabrication and characterization of a bismuth-silicate glass microsphere resonator has been demonstrated. At wavelengths near 1550 nm, high-modes can be efficiently excited in a 179 µm diameter bismuth-silicate glass microsphere via evanescent ...
Ding, M. +18 more
core +1 more source
Effect of Temperature on Chromite-Based Moulding Sands Bonded with Sodium Silicate
Archives of Foundry Engineering, 2017 In the paper, a research on effects of baking temperature on chromite sand base of moulding sands bonded with sodium silicate is presented. Pure chromite sand and its chromite-based moulding sand prepared with use of sodium silicate were subjected to ...
Stachowicz M. +3 more
doaj +1 more source
Chemistry of accessory chromian spinel in serpentinites from the Penjwen ophiolite rocks, Zagros thrust zone, [PDF]
Kirkuk Journal of Science, 2009 Chromian spinel is a widespread accessory mineral in ultramafic rocks of the Penjwen ophiolite, occurring in two modes; fresh grains in dunite rocks that crop out in the eastern part and altered grains in serpentinized peridotites in the western part of ...
Sabah A.Ismail
doaj +1 more source
Nanosilicates and molecular silicate dust species: properties and observational prospects
Frontiers in Astronomy and Space SciencesSilicate dust is found in a wide range of astrophysical environments. Nucleation and growth of silicate dust grains in circumstellar environments likely involves species with diameters ranging from <1 nm (molecular silicates) to a few nanometers ...
Stefan T. Bromley, Stefan T. Bromley
doaj +1 more source
In situ collection of dust grains falling from Saturn’s rings into its atmosphere [PDF]
, 2018 Saturn’s main rings are composed of >95% water ice, and the nature of the remaining few percent has remained unclear. The Cassini spacecraft’s traversals between Saturn and its innermost D ring allowed its cosmic dust analyzer (CDA) to collect material ...
Hsu, Hsiang-Wen +22 more
core +3 more sources
NanoSIMS-Analyse und hochauflösende Elektronenmikroskopie an präsolaren Silikaten aus roten Riesensternen und Supernovaexplosionen [PDF]
, 2009 This thesis deals with the analysis of “presolar” silicates and oxides by high resolution mass spectrometry and electron microscopy techniques. This “stardust” was identified by its extreme oxygen isotopic anomalies, which point to nucleosynthetic ...
Vollmer, Christian
core
Advanced Materials Technologies, EarlyView.Nano‐TiO2 and carboxylated cellulose nanofibers jointly regulate hydration‐product distribution in cementitious composites. Improved microstructural continuity and refined pore structure accompany enhanced strength and surface stability without a substantial increase in overall hydration.
Kailun Chen +8 more
wiley +1 more source
Laboratory Analysis of Silicate Stardust Grains of Diverse Stellar Origins [PDF]
, 2016 Silicate dust is ubiquitous in a multitude of environments across the cosmos, including evolved oxygen-rich stars, interstellar space, protoplanetary disks, comets, and asteroids.
Nakamura-Messenger, Keiko +2 more
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