Results 251 to 260 of about 507,192 (288)

Limiting density behavior of quartz powders

Powder Technology, 1969
Abstract An experimental study into the effects of varying particle characteristics on maximum and minimum bulk densities of dry quartz powders is presented. The characteristics which were varied are particle size, particle size distribution (or gradation), and particle shape.
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The influence of particle size on the pozzolanic reactivity of quartz powder

Powder Technology, 1999
Abstract Materials with cement-based matrices represent a class of materials notable for their wide and plentiful use. Up to the present, component reactivity was closely linked to the material's vitreous characteristics. The question we wanted to find an answer to was: is the pozzolanic reaction one which is specific to vitreous materials? To tackle
J.C. Benezet, A. Benhassaine
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Dynamical properties of epoxy composites filled with quartz powder

Journal of Alloys and Compounds, 2000
Abstract The dynamical mechanical properties of epoxy composites filled with different amounts of quartz powder were investigated. The loss tangent and the storage Young’s modulus were measured at frequencies between 5 and 323 Hz with a tension–compression device, from room temperature up to 460 K.
S.N Goyanes, J.D Marconi, P.G König, M.D Martin, I Mondragon   +4 more
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Densification of quartz powder and reduction of conductivity at 700°C

Journal of Geophysical Research: Solid Earth, 1995
We have measured axial strain, volumetric strain, and electrical conductivity during the densification at 700°C of ultra‐fine quartz powder (5–10 μm diameter) saturated with distilled water. Individual experiments were run at confining pressures ranging from 200 to 370 MPa and pore pressures of 30, 100, and 200 MPa. During the experiments, which lasted
David Lockner, Brian Evans
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Determination of quartz in kaolins by x-ray powder diffractometry

Analytica Chimica Acta, 1994
Abstract Depending upon their origin, naturally occuring kaolins contain various accessory minerals including micas, feldspars and quartz. These minerals may be partially removed, but rarely eliminated, by refining. When determining quartz by x-ray diffractometry, serious problems are encountered even with refined kaolins due to overlapping peaks ...
N.J. Elton, P.D. Salt, J.M. Adams
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Hydrogen generation by mechanochemical reaction of quartz powders in water

International Journal of Hydrogen Energy, 2011
Abstract The present work focuses on the chemical reaction of water with quartz powders undergoing mechanical activation. The reaction produces gaseous hydrogen and is accompanied by a decrease of the water pH. The observed behavior is related to the chemical reactivity of the active sites generated at the surface of quartz powders by fracture and ...
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Production of silica glass by vacuum sintering of quartz powder

Vacuum, 1963
Abstract Production of a transparent silica glass ingot by a vacuum sintering of −60 mesh quartz powder 2.3–3 kg with an assembled vertical type graphite crucible in a specially designed vacuum furnace was investigated. Formation of bubbles in the silica glass ingot depended mainly on the thickness of the quartz powder layer.
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Effect of quartz powder on mid-strength fly ash geopolymers at short curing time and low curing temperature

Construction and Building Materials, 2022
Gokhan Kaplan, Halûk Gorkem Alcan, Oğuzhan Celebi   +2 more
exaly  

Vacuum sintering of quartz powder and phase transformation of quartz

Vacuum, 1962
openaire   +1 more source

Effect of using available GGBFS, silica fume, quartz powder and steel fibres on the fracture behavior of sustainable reactive powder concrete

Construction and Building Materials, 2023
Parthiban Kathirvel
exaly