Thermal Conductivity of Sol-Gel Bonded Castables

The silica-alumina sol bonding agent, prepared by the sol gel route from ethyl silicate and aluminium isopropanol, was utilized in the refractory castables. The influence of structure on the heat transfer has been investigated using different sorts of refractory matrix. The results indicated that the heat conductivity of sol-gel bonded castables was considerably affected by their structure. The phase composition of matrix, porosity, pore size distribution and pore size structure were the most important factors. Thermal conductivity has been measured from the ambient temperature up to 1250 °C. The influence of crystalline phases and the glassy phase formation and the influence of the pore size distribution on the thermal conductivity were also described in this work.

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Properties of Sol-Gel Bonding Castables

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.1484 ◽

2007 ◽

Vol 336-338 ◽

pp. 1484-1487 ◽

Cited By ~ 7

Author(s):

Feng Cao ◽

Shi Gang Long ◽

Xing Rong Wu ◽

Rainer Telle

Keyword(s):

Size Distribution ◽

Sol Gel ◽

Modulus Of Rupture ◽

X Ray Diffraction ◽

Refractory Castables ◽

Cold Crushing Strength ◽

Silica Alumina ◽

Alumina Sol ◽

Slag Corrosion Resistance

The silica-alumina sol bonding agent, prepared by the sol gel route from ethyl silicate and aluminium isopropanol, was characterized by X ray diffraction, infrared spectroscopy, thermogravimetric analysis, particle size distribution. It was utilized in the corundum based refractory castables. The properties and characters such as cold crushing strength, apparent porosity, hot modulus of rupture, pore size distribution, scanning electron microscopy, energy dispersive spectral analysis, thermal shock and slag corrosion resistance tests of the selected samples from both the sol-gel bonding castables and the cement bonding castables were determined to identify the role of sol-gel additive in castables. The results show that the sol-gel bonding castables have a lot of advantages compared with traditional cement bonding castables and are more suitable for application in the ladles.

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Correlation of pore size distribution with thermal conductivity of precipitated silica and experimental determination of the coupling effect

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2019.01.074 ◽

2019 ◽

Vol 150 ◽

pp. 1037-1045 ◽

Cited By ~ 7

Author(s):

S. Sonnick ◽

M. Meier ◽

J. Ross-Jones ◽

L. Erlbeck ◽

I. Medina ◽

...

Keyword(s):

Thermal Conductivity ◽

Pore Size Distribution ◽

Experimental Determination ◽

Pore Size ◽

Size Distribution ◽

Coupling Effect ◽

Precipitated Silica

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Alteration of pore size distribution by sol–gel impregnation for dynamic range and sensitivity adjustment in Kelvin condensation-based humidity sensors

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2013.10.032 ◽

2014 ◽

Vol 191 ◽

pp. 572-578 ◽

Cited By ~ 34

Author(s):

F. Hossein-Babaei ◽

S. Rahbarpour

Keyword(s):

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Dynamic Range ◽

Sol Gel ◽

Humidity Sensors

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Porosity and pore size distribution influence on thermal conductivity of yttria-stabilized zirconia: Experimental findings and model predictions

Ceramics International ◽

10.1016/j.ceramint.2015.12.122 ◽

2016 ◽

Vol 42 (5) ◽

pp. 5802-5809 ◽

Cited By ~ 32

Author(s):

Giorgio Pia ◽

Ludovica Casnedi ◽

Ulrico Sanna

Keyword(s):

Thermal Conductivity ◽

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Yttria Stabilized Zirconia ◽

Stabilized Zirconia ◽

Model Predictions ◽

Experimental Findings

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Erratum to “A modified sol–gel process-derived highly nanocrystalline mesoporous NiO with narrow pore size distribution” [Colloids Surf. A: Physicochem. Eng. Aspects 296 (1–3) (2007) 222–229]

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2007.05.068 ◽

2007 ◽

Vol 305 (1-3) ◽

pp. 149

Author(s):

Thammanoon Sreethawong ◽

Sumaeth Chavadej ◽

Supachai Ngamsinlapasathian ◽

Susumu Yoshikawa

Keyword(s):

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Sol Gel ◽

Narrow Pore Size Distribution ◽

Sol Gel Process

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Theory of Nuclear Relaxation in Confining Systems. Application to Non Wetting Liquids in Porous Silica Glasses

MRS Proceedings ◽

10.1557/proc-290-107 ◽

1992 ◽

Vol 290 ◽

Author(s):

J.-P. Korb ◽

A. Delville ◽

Shu Xu ◽

J. Jonas

Keyword(s):

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Sol Gel ◽

Porous Silica ◽

Nuclear Relaxation ◽

Narrow Pore Size Distribution ◽

Silica Glasses ◽

Frequency Dependences ◽

Wetting Liquid

AbstractThis work shows how the geometrical confinements enhances the nuclear relaxation of a non wetting liquid in a model porous systems. Application of the proposed theory is made to interpret the size and frequency dependences of the 1H relaxation of methylcyclohexane liquid in sol-gel porous silica glasses with narrow pore-size distribution.

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Conducting Membranes and Coatings made from Redispersable Nanoscaled Crystalline SnO2:Sb Particles

MRS Proceedings ◽

10.1557/proc-520-293 ◽

1998 ◽

Vol 520 ◽

Cited By ~ 1

Author(s):

C. Goebbert ◽

M. A. Aegerter ◽

D. Burgard ◽

R. Nass ◽

H. Schmidt

Keyword(s):

Thermal Treatment ◽

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Sol Gel ◽

Total Porosity ◽

Solid Content ◽

Visible Range ◽

Inorganic Membranes ◽

Separation Processes

ABSTRACTInorganic membranes prepared by the sol gel method are promising candidates for use as filters in separation processes. Conducting supported membranes and coatings have been produced from redispersable nanoscaled crystalline Sb-doped SnO2 powders with a Sb content up to 5 mole % (with respect to Sn). The crystalline particles are monosized (≅4 nm) and fully redispersable in aqueous solution at pH ≥ 8 with a solid content up to 70 wt. %. By thermal treatment at different temperatures and times, the pore size diameter of the material can be adjusted from 4 to 20 nm with a very narrow pore size distribution (∼ ±1 nm) and a total porosity of 63 %, practically independent of the sintering parameters. Uniaxial pressed substrates present similar characteristics with however larger pore size distribution (±5 nm) and 80 % total porosity. Their resistance decreases with sintering temperature and time down to 4 Ω (800 °C 8 h). Fully dispersed aqueous solutions of the powder (25 wt. %) were used to prepare transparent conducting coatings on glass or ceramics by spin-coating. After thermal treatment (1 hour at 550 °C) single layers 200 nm thick exhibited a typical specific electrical resistance ρ = 2.5·10−2 ωcm with transmission in the visible range measured against air of 90%.

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