Results 21 to 30 of about 154,019 (297)

Template-free inorganic synthesis of silica-based nanotubes and their self-assembly to mesocrystals [PDF]

, 2012
A novel synthesis approach for silica-based nanotubes (NTs) was discovered in the purely inorganic system containing the molecular compounds OP(NH2)3, SP(NH2)3 and SiCl4 in evacuated and sealed silica glass ampoules.
Dennenwaldt, Teresa, Scheu, Christina, Schnick, Wolfgang, Sedlmaier, Stefan J.   +3 more
core   +1 more source

Micropillar Testing of Amorphous Silica [PDF]

International Journal of Applied Glass Science, 2012
Amorphous silica exhibits a complex mechanical response. The elastic regime is highly nonlinear while plastic flow does not conserve volume, resulting in densification. As a result the quantification of a reliable constitutive equation is a difficult task.
Lacroix, Rémi, Chomienne, Vincent, Kermouche, G., Teisseire, J., Queste, S., Barthel, E.   +5 more
openaire   +2 more sources

Ice sheets as a missing source of silica to the polar oceans [PDF]

, 2017
Ice sheets play a more important role in the global silicon cycle than previously appreciated. Input of dissolved and amorphous particulate silica into natural waters stimulates the growth of diatoms.
A Cefarelli, A Dai, AJ Hodson, AJ Tedstone, C Jeandel, C Lopes, C Lydersen, CA Durkin, DJ Conley, DJ Conley, DJ DeMaster, DM Chandler, E Hood, EAC Follett, ES Eiriksdottir, F Herman, F Pattyn, HH Durr, I Bartholomew, IJ Lin, J Bamber, J Hawkings, J Telling, JA Graly, JC Yde, JD Rimstidt, JH Henderson, JL Wadham, JP Icenhower, JPM Syvitski, JR Hawkings, JR Hawkings, JT Cornelis, JW Crompton, K Kato, KG Harrison, KR Hendry, KR Hendry, L Meire, L Meire, LC Biddle, LM Wehrmann, LPAM Duprat, M Tedesco, MA Depoorter, MJ Hopwood, MP Bhatia, MT Jones, N Henriksen, P Cermeno, P Greisman, P Tréguer, PJ Frings, PJ Frings, PJ Tréguer, PJ Tréguer, PM Dove, R Hellmann, R Raiswell, RA Berner, RF Anderson, RW Smith, S Palmer, SC Painter, SM Aciego, SP Anderson, SP Anderson, SPS Gulick, SR Gislason, T Cowton, T Cowton, TJ Shaw, TN Markussen, WH Casey, WR Peltier, WW Hay   +75 more
core   +5 more sources

Effect of amorphous silica by rice husk ash on physical properties and microstructures of recycled aluminium chip AA7075 [PDF]

, 2019
High strength to weight ratio of aluminium reinforced as metal matrix composites is a well known material used in automotive application. The effects of recycled aluminium chips AA7075 with amorphous silica by rice husk ash on the physical properties and
Armesto, Das, Gronostajski, Ibrahim, Ismail, Kadir, Kadir, Kenneth, Koteswara Rao, Lindroos, Mahdi, Mahdi, Mahdi, Meyveci, Mustapa, Mustapa, Rohani, Saravanan, Tiwari   +18 more
core   +1 more source

The Nanostructures Of Amorphous Silicas

Microscopy and Microanalysis, 2000
Abstract Silicon dioxide is an important catalyst material, a mainstay insulator in microelectronics, and a widely distributed terrestrial and marine skeletal mineral. Geologically, it is found in one of a large number of polymorphic crystalline states, but can also be rendered “amorphous” by rapid cooling from the melt through a glass ...
Linn W, Hobbs, Xianglong, Yuan, L C, Qin, Vinay, Pulim, Alexander, Coventry   +4 more
openaire   +2 more sources

Elementary plastic events in amorphous silica [PDF]

Physical Review E, 2019
Plastic instabilities in amorphous materials are often studied using idealized models of binary mixtures that do not capture accurately molecular interactions and bonding present in real glasses. Here we study atomic scale plastic instabilities in a three dimensional molecular dynamics model of silica glass under quasi-static shear.
Bonfanti Silvia, Guerra Roberto, Mondal Chandana, Procaccia Itamar, Zapperi Stefano   +4 more
openaire   +4 more sources

Experimental evaluation of rice husk ash for applications in geopolymer mortars

Journal of Bioresources and Bioproducts, 2021
Rice husks obtained from upland and lowland rice varieties were characterized for composition and content of ash. Each of the rice husk varieties was fired at temperatures of 600, 800 and 900 °C for a soaking period of 3 h.
G. Ogwang, P.W. Olupot, H. Kasedde, E. Menya, H. Storz, Y. Kiros   +5 more
doaj   +1 more source

Vibrations in amorphous silica [PDF]

Journal of Non-Crystalline Solids, 2016
Abstract In this paper, we describe the vibrational properties of a realistic 648-atom model of SiO 2 ([1] Tafen and Drabold, 2005). The normal modes of the model are computed with the ab initio density functional code SIESTA ([2] Soler et al., 2002).
Bishal Bhattarai, D.A. Drabold
openaire   +1 more source

The Synthesis and Characterization of Low-cost Mesoporous Silica SiO2 from Local Pumice Rock

Nanomaterials and Nanotechnology, 2015
Pumice is a porous volcanic rock containing a significant proportion of silica and alumina, and which has a low iron content. This natural, silica-rich material attracts wide attention because of its applications in adsorption process‐ es, heterogeneous ...
Asmaa Mourhly, Mariam Khachani, Adnane El Hamidi, Mohammed Kacimi, Mohammed Halim, Said Arsalane   +5 more
doaj   +1 more source

Amorphous silica waste from a geothermal central as an adsorption agent of heavy metal ions for the regeneration of industrial pre-treated wastewater

Water Resources and Industry, 2018
An industrial wastewater regeneration treatment was successfully designed taking advantage of the amorphous silica adsorption properties, generated as an industrial waste in a geothermal power plant located in the city of Mexicali, Baja California.
Oscar Gustavo Miranda Sandoval, Gerardo Cesar Díaz Trujillo, Alma Elia Leal Orozco   +2 more
doaj   +1 more source