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Dissolution of powdered quartz
Nature, 1975POWDERED quartz exhibits an initially high solubility rate but opinions are divided as to the cause. Clelland1 argued in favour of the ‘Beilby layer’—a skin of vitreous material produced during grinding; whereas Talbot2 stated that the numerous small particles which were always found adhering to the larger particles of quartz offered a plausible ...
G. S. M. MOORE, H. E. ROSE
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The Structure of Powdered Quartz
Nature, 1973DIFFERENTIAL thermal analysis (d.t.a.) of quartz normally reveals an endothermic peak at 573° C, corresponding to the inversion from low quartz to high quartz. If the quartz is subjected to grinding it is observed that the peak size decreases, both in height and area; this effect is usually attributed to conversion during grinding of quartz to some ...
G. S. M. MOORE, H. E. ROSE
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Thermodynamic Properties of Methane Hydrate in Quartz Powder
The Journal of Physical Chemistry B, 2007Using the experimental method of precision adiabatic calorimetry, the thermodynamic (equilibrium) properties of methane hydrate in quartz sand with a grain size of 90-100 microm have been studied in the temperature range of 260-290 K and at pressures up to 10 MPa.
Vitaly P, Voronov +2 more
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Effect of agglomeration purification of quartz powders on the quality of quartz glass
Glass and Ceramics, 2009The effect of agglomeration purification of quartz powders on the quality of quartz glasses obtained using quartz raw materials from the “Berkutinskaya” and No. 175 veins of the Kyshtym deposit is studied. Analysis of the optical transmission spectra and the structural characteristics of the glasses made shows that agglomeration purification of the ...
R. Sh. Nasyrov +2 more
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Air fractionation of quartz powders
Refractories, 1969The results of the investigation have opened the way for the use of the air classification method for quartz powders in the refractories industry.
M. D. Barskii +5 more
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Grinding and pozzolanic reactivity of quartz powders
Powder Technology, 1999Abstract Cement-based materials are in wide use — partly in the belief that their reactivity is due to their glassy nature. The question we wish to investigate is: how specific is the link between the pozzolanic reaction and glassy materials? In order to answer it, we take the case of quartz, a material often used in cement-based matrices, reputed to
J.C Benezet, A Benhassaine
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Inorganic Chemistry
This study investigates the process mechanisms for preparing 4N8 high-purity quartz powder from high-silicon iron ore tailings. Silicon concentrate obtained by wet high-intensity magnetic separation was used as the raw material, with impurities removed ...
Hailin Long +5 more
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This study investigates the process mechanisms for preparing 4N8 high-purity quartz powder from high-silicon iron ore tailings. Silicon concentrate obtained by wet high-intensity magnetic separation was used as the raw material, with impurities removed ...
Hailin Long +5 more
semanticscholar +1 more source
Determination of Amorphous Phase in Quartz Powder by X-Ray Powder Diffractometry
Powder Diffraction, 1989Abstract A powder diffraction method was applied to the quantitative analysis of amorphous silica in several quartz powders. Two calibration methods, i.e., direct analysis and the standard addition method were examined. Calibration mixtures were made by mixing a standard silica gel powder ground to under 5 μm particle size with a ...
Toshihiro Nakamura +4 more
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