Nanotechnology in Refractory Castables — An Overview
May 30 2018 · In recent times nanotechnology has gained significant attention in the field of refractory research. As the unshaped refractory especially the castable is becoming of prime importance in refractory research a good amount of work is going on globally to study the effect of nanotechnology on castables. The Effect of different nano-oxide binders formed from colloidal bonding agents and nano
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LUDOX® Colloidal SilicaGrace
LUDOX ® colloidal silica improves the performance of your products as inorganic binders reinforcing and strengthening agents refractory bonding agents and sur face modifiers. As a binder it provides excellent strength and adhesion in catalyst washcoats and catalyst structures precision investment casting molds insulation boards and other
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(PDF) Rheological performance of High alumina nano-bonded
This article reviews the recent developments in nano-bonded refractory castables focusing on the use of colloidal silica or alumina. In the first part of the paper a comparison of different
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The Role of SiC and Different Binders on Mechanical
Silica refractory sample containing 20 wt. SiC and 5 wt. borax as a binder had the best results of mechanical strength and compaction. In this sample glassy phases formed fills the voids and increasing temperature between particles. In fact glass phase formation increase compaction density and strength. Keywords Silica refractory Binders
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Sodium silicateWikipedia
Sodium silicate is a generic name for chemical compounds with the formula Na 2x Si y O 2y x or (Na 2 O) x · (SiO 2) y such as sodium metasilicate Na 2 SiO 3 sodium orthosilicate Na 4 SiO 4 and sodium pyrosilicate Na 6 Si 2 O 7.The anions are often polymeric.These compounds are generally colorless transparent solids or white powders and soluble in water in various amounts.
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Nano-bonded refractory castablesScienceDirect
May 01 2013 · The use of colloidal silica as an alternative binder has been studied by many researchers in recent years and recently reports have also explored the use of colloidal alumina for the same purpose. This article reviews the recent developments in nano-bonded refractory castables focusing on the use of colloidal silica or alumina.
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FIRE Compendium Series Vol. 1 Refractory Castable
2.4. Eff ect of castable s matrix and additives on binder hydration 191 2.5. Evolution of CAC and HA-bonded castables properties during the curing stage 205 3. Chemical binders (phosphates) 211 3.1. Bonding mechanisms 213 4. Colloidal binders 217 4.1. Colloidal silica (CS) 219 4.2. Colloidal alumina (CA) 235 5. Final remarks 241 6
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Development and study of composite refractory materials
V. A. Doroganov "Refractory mixes of silica and high-alumina compositions based on modifying binder suspensions " Diss. Cand. Tech. Sci. for Specialists "Technology of silicate and refractory non-metallic materials " Belogorod (2005). Google Scholar
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(PDF) EFFECT OF NANO-SILICA AND METAKAOLIN ON PROPERTIES
The properties of cement were within limits as per 1.4 MERITS OF NANO-SILICA IS 8112 1989. The properties are shown in Table-1. Adding Nano-silica to concrete enhances its mechanical properties and durability. Concrete is the most commonly used material for construction.
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Nano mullite bonded refractory castable composition for
Aug 15 2016 · Mullite sol bonded compositions were processed conventionally and characterized for various refractory properties after heat treatment at different temperatures up to 1650 °C. The developed properties are also compared with the castable prepared by using commercial silica sol as
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Introductory Chapter Properties and Applications of
Jan 11 2018 · The chemical interaction and mechanical interlocking between the hydraulic binder and the additives. Effect of hydraulic binder composition that is calcium alumina sulfate alkali and silica ration. Effect of curing temperature as it increases ultimate strength is reduced.
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Development and study of composite refractory materials
V. A. Doroganov "Refractory mixes of silica and high-alumina compositions based on modifying binder suspensions " Diss. Cand. Tech. Sci. for Specialists "Technology of silicate and refractory non-metallic materials " Belogorod (2005). Google Scholar
Get Price(PDF) EFFECT OF NANO-SILICA AND METAKAOLIN ON PROPERTIES
The properties of cement were within limits as per 1.4 MERITS OF NANO-SILICA IS 8112 1989. The properties are shown in Table-1. Adding Nano-silica to concrete enhances its mechanical properties and durability. Concrete is the most commonly used material for construction.
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EPA4Functionalized silica with elastomer binder
functionalized silica elastomer binder elastomer binder functionalized Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Pending Application number EP.9A Other languages
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LUDOX® Colloidal SilicaGrace
LUDOX ® colloidal silica improves the performance of your products as inorganic binders reinforcing and strengthening agents refractory bonding agents and sur face modifiers. As a binder it provides excellent strength and adhesion in catalyst washcoats and catalyst structures precision investment casting molds insulation boards and other
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Preparation Characterization of Insulating Rice Husk Ash
Abstract Preparation of the Insulating Silica Refractory was done by utilizing the waste Rice Husk Ash taken from rice mills. These insulating properties can be obtained by controlling the porosity of the sample by using different amount of rice husk as pore forming media and different firing temperatures.
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Dr. Akhilesh Kumar SinghAssistant ProfessorParul
The castable compositions are conventionally processed using the synthesized sols as sole binders and characterized for various refractory properties after heat treatment at different temperatures. These synthesized sol containing compositions are also compared with the commercial silica sol containing ones and cement bonded castables
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NON-CemeNt refraCtOry CaStableS CONtaiNiNg NaNO-SiliCa
In this study the effect of nano-silica sol content on the self-flow characteristics microstructure physical and mechanical properties of high-alumina self-flowing non-cement castable has been studied. The self-flow characteristics such as self-flow value and working time has been evaluated. The bulk density apparent porosity mechanical properties and microstructure of fired castables at
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NON-CemeNt refraCtOry CaStableS CONtaiNiNg NaNO-SiliCa
In this study the effect of nano-silica sol content on the self-flow characteristics microstructure physical and mechanical properties of high-alumina self-flowing non-cement castable has been studied. The self-flow characteristics such as self-flow value and working time has been evaluated. The bulk density apparent porosity mechanical properties and microstructure of fired castables at
Get PriceOptimization of the Binder System for Improving
May 30 2018 · Plastic refractory properties were studied by synthesizing two different binders in the laboratory. Liquid phosphate binders from different sources a sol-gel bonding system organic plasticizers water retention agent and deflocculating agent were optimally mixed using different techniques for binder synthesis. The stability of the thixotropic behaviour of the binders varied with
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Microstructural and mechanical investigation of high
nano-materials. Nano-materials improve several properties of re-fractory products. It was found that colloidal silica (a stable dispersion of nano-sized particles of amorphous SiO 2) is suitable as a calcium-free binder for high alumina ultra-low cement refractory castables 11 12 . Yaghoubi et al. 12 reported that the refractory castables
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FIRE Compendium Series Vol. 1 Refractory Castable
2.4. Eff ect of castable s matrix and additives on binder hydration 191 2.5. Evolution of CAC and HA-bonded castables properties during the curing stage 205 3. Chemical binders (phosphates) 211 3.1. Bonding mechanisms 213 4. Colloidal binders 217 4.1. Colloidal silica (CS) 219 4.2. Colloidal alumina (CA) 235 5. Final remarks 241 6
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(PDF) EFFECT OF NANO-SILICA AND METAKAOLIN ON PROPERTIES
The properties of cement were within limits as per 1.4 MERITS OF NANO-SILICA IS 8112 1989. The properties are shown in Table-1. Adding Nano-silica to concrete enhances its mechanical properties and durability. Concrete is the most commonly used material for construction.
Get Price
Nanotechnology in Refractory Castables — An Overview
May 30 2018 · In recent times nanotechnology has gained significant attention in the field of refractory research. As the unshaped refractory especially the castable is becoming of prime importance in refractory research a good amount of work is going on globally to study the effect of nanotechnology on castables. The Effect of different nano-oxide binders formed from colloidal bonding agents and nano
Get Price
USALow thermal conductivity high strength
A low thermal conductivity high strength refractory castable composition with high abrasion resistance consisting essentially of about 55 to 80 by weight amorphous silica about 5 to 25 by weight of a calcined alumino-silicate aggregate having a density of about 30 to 70 pcf and a particle size of about -10 to 65 mesh about 5 to 40 by weight of calcined fireclay fines about 1 to 10 by
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Inorganic binder composition for castingDR AXION CO. LTD.
The present disclosure relates to an inorganic binder composition for casting including water glass of 40 to 70 parts by weight nano-silica of 5 to 35 parts by weight a Li-based water resistant additive of 0.1 to 10 parts by weight an organic silicon compound of 0.1 to 10 parts by weight and an anti-sand burning additive of 1 to 10 parts by weight.
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V. A. Doroganov "Refractory mixes of silica and high-alumina compositions based on modifying binder suspensions " Diss. Cand. Tech. Sci. for Specialists "Technology of silicate and refractory non-metallic materials " Belogorod (2005). Google Scholar
Get PriceSELF-BONDING REFRACTORIES FOR INVESTMENT CASTING
FIG. 4 is a table comparing known colloidal silica slurry compositions with self-bonded refractory slurry compositions lacking colloidal silica in accordance with an embodiment. FIG. 5 shows typical flash-fire-dewax and fired molds in accordance with an embodiment. FIG. 6 shows castings made from ceramic molds in accordance with an embodiment.
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Aspects of the modification of refractory concrete with
Mar 08 2012 · Aspects of the modification of refractory concretes with different grades of Ludox nanosilica are discussed. It was established that the addition of nanosilica TMA to the binder in amounts no greater than 25 of the binder s weight increases the strength of medium-cement concretes and alleviates their softening. The grade of nanosilica that is optimum for super-low-cement concretes is
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