Results 21 to 30 of about 381,696 (284)
An experimental investigation of the condensation of silicate grains [PDF]
The Astrophysical Journal, 1978 Amorphous magnesium silicate smoke particles were condensed from hydrogen and argon atmospheres containing Mg and Si0. A wide range of initial compositions were observed but all particles could be recrystallized into forsterite (Mg2Si04), by heating to 1000 C in vacuum.
K. L. Day, B. Donn
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Model Dust Envelopes Around Silicate Carbon Stars [PDF]
Journal of Astronomy and Space Sciences, 2006 We have modeled dust envelopes around silicate carbon stars using optical properties for a mixture of amorphous carbon and silicate dust grains paying close attention to the infrared observations of the stars.
Kyung-Won Suh
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Quartz dissolution associated with magnesium silicate hydrate cement precipitation [PDF]
Solid Earth, 2021 Quartz has been replaced by magnesium silicate hydrate cement at the Feragen ultramafic body in south-east Norway. This occurs in deformed and recrystallized quartz grains deposited as glacial till covering part of the ultramafic body.
L. de Ruiter +4 more
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Extinction Curves for Graphite-Silicate Grain Mixtures [PDF]
Symposium - International Astronomical Union, 1970 Mixtures of graphite particles ejected from carbon stars and silicates from oxygen-rich giants are capable of producing excellent fits to the observed interstellar extinction curve. The fits extend over the entire wavelength range of the observations, and include a hump at ~ 2200 Å in the ultraviolet due to the graphite components of the mixtures.
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Massive Protostellar Disks as a Hot Laboratory of Silicate Grain Evolution
The Astrophysical Journal, 2023 Typical accretion disks around massive protostars are hot enough for water ice to sublimate. We here propose to utilize the massive protostellar disks for investigating the collisional evolution of silicate grains with no ice mantle, which is an ...
Ryota Yamamuro +2 more
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THE EFFECTS OF RE-PRESSING ON BIAXIAL FLEXURAL STRENGTH AND MICROSTRUCTURE OF CELTRA PRESS (AN INVITRO STUDY) [PDF]
Alexandria Dental Journal, 2022 Introduction: Celtra® Press is a zirconia-reinforced lithium silicate (ZLS) glass-ceramic containing 10 % zirconium oxide (ZrO2). This material is used to fabricate dental restorations by pressing technique.
Sherif Yehia, Ihab Hammad, Amir Azer
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Identification of Silicate and Carbonaceous Presolar Grains in the type 3 Enstatite Chondrites [PDF]
, 2008 We surveyed presolar grains in primitive enstatite chondrites by isotopography using the HokuDai isotope microscope system. The mineral identification has been conducted by X-ray analysis with scanning electron microscopy.
Ebata, Shingo, Yurimoto, Hisayoshi
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Occurrence of rice blast on and grain quality of irrigated rice fertilized with nitrogen and silicates [PDF]
Pesquisa Agropecuária Brasileira, 2019 : The objective of this work was to evaluate the effects of fertilization with nitrogen topdressing and silicates, as well as of the use of fungicides, on the occurrence of rice blast on panicles, milling yield, and whole grains, vitreous grains, and ...
Lillian Matias de Oliveira +7 more
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Journal of Advanced Ceramics, 2023 Rare earth (RE) silicate is one of the most promising environmental barrier coatings for silicon-based ceramics in gas turbine engines. However, calcium–magnesium–alumina–silicate (CMAS) corrosion becomes much more serious and is the critical challenge ...
Zhilin Tian +9 more
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Effect of Temperature on Chromite-Based Moulding Sands Bonded with Sodium Silicate
Archives of Foundry Engineering, 2016 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
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