نتایج جستجو برای: Colloidal silica

تعداد نتایج: 54127  

A. R. Souri, H. Sarpoolaky, N. Hamedani Golshan,,

Abstract: Efforts have been carried out in order to use microsilica to develop a forsterite bond rather than other types of binders in the basic refractory castables. According to the higher drying rate and sinterability of colloidal silica, it has been proposed in the recent years. In the present work, effects of replacement of microsilica by colloidal silica evolution of forsterite bond have ...

Journal: :journal of chemical and petroleum engineering 0
atieh eskandari faculty of chemical, petroleum and gas engineering, semnan university, semnan, i.r. iran. mansoor anbia research laboratory of nanoporous materials, faculty of chemistry, iran university of science and technology, tehran 16846-13114, iran. mansour jahangiri faculty of chemical, petroleum and gas engineering, semnan university, semnan, i.r. iran. fariba mohammadi nejati faculty of chemical, petroleum and gas engineering, semnan university, semnan, i.r. iran.

silicon and aluminum sources are most important reactants in the synthesis of zeolite. the use of the silicon source has an important effect on the crystallization of zeolites. also, it can change the properties of the end product. this work reports the influence of three common commercial silica sources such as colloidal silica (ludox am-30), fumed silica and water glass on the crystallinity o...

Silicon and aluminum sources are most important reactants in the synthesis of zeolite. The use of the silicon source has an important effect on the crystallization of zeolites. Also, it can change the properties of the end product. This work reports the influence of three common commercial silica sources such as colloidal silica (Ludox AM-30), fumed silica and water glass on the crystallinity o...

Journal: :international journal of nano dimension 0
s. sadegh hassani catalysis and nanotechnology research division, research institute of petroleum industry, p. o. box: 1485733111, tehran, iran a. rashidi catalysis and nanotechnology research division, research institute of petroleum industry, p. o. box: 1485733111, tehran, iran m. adinehnia catalysis and nanotechnology research division, research institute of petroleum industry, p. o. box: 1485733111, tehran, iran n. montakhab catalysis and nanotechnology research division, research institute of petroleum industry, p. o. box: 1485733111, tehran, iran

this study is focused on synthesis of nano-colloidal silica via alkaline water glass solution. sodium ions of water glass were removed by cation exchanging in a resin column to obtain the silicic acid which was titrated to the solution of sodium silicate. concentration of the colloidal silica and ph value of the solutions were controlled using different concentrations of alkaline sodium silicat...

A. Souri, F. Golestanifard, H. Sarpoolaky, H. Yaghoubi,

Colloidal silica bonded refractory castables have been developed recently. It was found that colloidal silica is one of the best binders can substitute other binders such as cement in No Cement Castable (NCC) and Ultra Low Cement Castable (ULCC) refractories. Also composition of colloidal silica with appropriate additives resulted in a gel form which makes the initial strength. Moreover, the na...

Journal: :international journal of nanoscience and nanotechnology 2014
v. jafari a. allahverdi

colloidal nanosilica is currently being produced by various methods which are mainly high energy intensive and/or not environmentally friendly. it is therefore essential to develop new energy-efficient and environmentally friendly technologies. this paper introduces a new ultrasound assisted route based on alkali leaching of silica fume for synthesis of colloidal silica nanoparticles. the ef...

A. Rashidi, M. Adinehnia N. Montakhab S. Sadegh Hassani

This study is focused on synthesis of nano-colloidal silica via alkaline water glass solution. Sodium ions of water glass were removed by cation exchanging in a resin column to obtain the silicic acid which was titrated to the solution of sodium silicate. Concentration of the colloidal silica and pH value of the solutions were controlled using different concentrations of alkaline sodium silicat...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2008
asghar karami gholam reza vahdany mohammad abedi mehdi fattahi

in this study, alkaline colloidal silica was prepared by titration of an alkaline solution such as sodium silicate with silicic acid in constant range of ph  .this constant range of ph was achieved by using concentrated soduim silicate solutions as ph adjusting solutions during titration.the sodium silicate solutions  having a variety of concentrations were passed  through ion-exchange resin to...

A. Rashidi, M. Adinehnia N. Montakhab S. Sadegh Hassani

This study is focused on synthesis of nano-colloidal silica via alkaline water glass solution. Sodium ions of water glass were removed by cation exchanging in a resin column to obtain the silicic acid which was titrated to the solution of sodium silicate. Concentration of the colloidal silica and pH value of the solutions were controlled using different concentrations of alkaline sodium silicat...

A. Allahverdi V. Jafari

Colloidal nanosilica is currently being produced by various methods which are mainly high energy intensive and/or not environmentally friendly. It is therefore essential to develop new energy-efficient and environmentally friendly technologies. This paper introduces a new ultrasound assisted route based on alkali leaching of silica fume for synthesis of colloidal silica nanoparticles. The ef...

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