Results 141 to 150 of about 3,194 (191)

Determination of crystalline silica in silica fume

Talanta, 1994
Silica fume is formed as a by-product in the manufacture of silicon from quartzite. This paper describes an analytical method for the determination of crystalline silica in silica fume. The crystalline silica was determined after removal of amorphous silica from the fume. A gravimetric method was developed for the determination of the total crystalline
A, Fletcher, D, Phillips, I, Barrow
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Wet-Mix silica Fume Shotcrete: Effect of Silica Fume Form

"SP-132: Fly Ash, Silica Fume, Slag, and Natural Pozzolans and Natural Pozzolans in Concrete - Proceedings Fourth Interna", 1992
This study investigated the influence of the different forms of silica fume on the plastic and hardened porperties of wet-mix shotcrete. The silica fume forms studied were: uncompacted silica fume; compacted low density silica fume; compacted high density silica fume.
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Morphology and surface properties of fumed silicas

Journal of Colloid and Interface Science, 2005
Several series of fumed silicas and mixed fumed oxides produced and treated under different conditions were studied in gaseous and liquid media using nitrogen and water adsorption-desorption, mass spectrometry, FTIR, NMR, thermally stimulated depolarization current (TSDC), photon correlation spectroscopy (PCS), zeta potential, potentiometric titration,
V M, Gun'ko, I F, Mironyuk, V I, Zarko, E F, Voronin, V V, Turov, E M, Pakhlov, E V, Goncharuk, Y M, Nychiporuk, N N, Vlasova, P P, Gorbik, O A, Mishchuk, A A, Chuiko, T V, Kulik, B B, Palyanytsya, S V, Pakhovchishin, J, Skubiszewska-Zieba, W, Janusz, A V, Turov, R, Leboda   +18 more
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Cycloolefin copolymer/fumed silica nanocomposites

Journal of Applied Polymer Science, 2010
AbstractWe prepared cycloolefin copolymer (COC)/fumed silica nanocomposites by melt compounding to study the effect of the filler dimensions (filler surface area) on the physical properties, with particular attention to their thermal, mechanical, and optical behaviors.
Dorigato, Andrea, Pegoretti, Alessandro, Fambri, Luca, Slouf, M., Kolarik, J.   +4 more
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Alkali silica reactivity of agglomerated silica fume

Cement and Concrete Research, 2007
It is commonly accepted that replacement of a portion of cement in mortar or concrete with well-dispersed silica fume reduces expansion caused by alkali silica reaction. Recently there has been much discussion that large, agglomerated particles of silica fume may actually act as alkali silica reactive aggregates, thereby increasing expansion rather ...
Andrew J. Maas, Jason H. Ideker, Maria C.G. Juenger   +2 more
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CVD-zirconia on fumed silica and silica gel

Applied Surface Science, 2005
Abstract Two series of CVD-zirconia/silica samples were synthesised on the basis of silica gel Si-60 and fumed silica A-380 as substrates using zirconium tetrachloride chemisorbed then hydrolysed heated. The reaction cycles were repeated up to four times.
M.V. Borysenko, V.M. Gun’ko, A.G. Dyachenko, I.Y. Sulim, R. Leboda, J. Skubiszewska-Zięba, J. Ryczkowski   +6 more
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Fumed silica synthesis. Influence of hydrogen chloride on the fumed silica particle formation process

Macromolecular Symposia, 2003
AbstractInteraction of silicon dioxide molecule up to the small silica protoparticle and primary particle formation, and influence of hydrogen chloride (HCl), water (H2O) and inert molecules (nitrogen N2) “under flame condition” and “after cooling” on structure and properties of fumed silica were investigated by quantum‐chemical simulations. An attempt
Alexey V. Khavryutchenko, Vladimir D. Khavryutchenko   +1 more
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Quantification of branching in fumed silica

Journal of Aerosol Science, 2017
Abstract The fractal structure of ceramic aggregates has been widely studied in terms of the mass fractal dimension and primary particle size. However, there has not yet been a quantitative description of the branched topology in these structures.
Andrew Mulderig, Gregory Beaucage, Karsten Vogtt, Hanqiu Jiang, Vikram Kuppa   +4 more
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Investigation on the Effect of Silica Fume on Shrinkage Characteristics of Portland Cement-Silica Fume Paste

Advanced Materials Research, 2012
The ring-test was used to evaluate the plastic shrinkage crack tendency of paste specimen added with silica fume in this investigation. Silica fume was used as a partial replacement by weight of cement from 0% to 30%. The compressive strength and drying shrinkage were also examined.
Le Anh Tuan Bui, Chun Tsun Chen, Chao Lung Hwang, Fondly Reymont Kurniawan, Cheng Hsiao Li   +4 more
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Sustainable route for silica preparation from silica fume

Environmental Technology
Silica fume (SF) is a major voluminous and bulky by-product of the ferrosilicon industry, and its disposal poses a significant environmental concern. To address this issue, a sustainable approach was employed to transform SF into silica powder using a precipitation method.
Jiabao, Deng, Dawei, Luo, Ke, Rong
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