Monolithic silica aerogel insulation doped with TiO2 powder and ceramic fibers

Wang, J.; Kühn, Joachim; Lu, X.

doi:10.1016/0022-3093(95)00068-2

Cited by 134 publications

(62 citation statements)

References 4 publications

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“…In this work, fumed silica, reinforced fiber, and powder additives were used as the basic components [10][11][12]. Fumed silica was AEROSIL 200 from Degussa with specific surface area of 200 m 2 /g and average primary particle size of 12 nm [13].…”

Section: Methodsmentioning

confidence: 99%

Effects of Powder Additives on Thermal Shrinkage of Nanoporous Silica Insulation

Feng¹,

Wang²,

Feng³

2016

JRST

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ABSTRACT:In this study, four powder additives were introduced as high-temperature shrinkage inhibitors to make high performance nanoporous silica insulation. The introduction of fumed alumina could greatly improve the thermal stability of the composites at higher temperatures, and the maximum service temperature could be increased to about 1000°C. When 5% fumed alumina was added, the volume shrinkage decreased from 18.49% to 3.47%. Moreover, better results could be achieved with the increase in mass ratio. In addition, fumed titania also improved the thermal stability of the composites to some extent, while boron carbide and boron nitride led to poor performance.

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Section: Methodsmentioning

confidence: 99%

Effects of Powder Additives on Thermal Shrinkage of Nanoporous Silica Insulation

Feng¹,

Wang²,

Feng³

2016

JRST

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“…SEM magnification ×500, BSE detector. Accelerating voltage 15 kV opacifier [28,29]. Analogous concentrations of Fe in the Pyrogel® sample probably come from Fe 3 O 4 , another opacifier.…”

Section: Sem Characterizationmentioning

confidence: 99%

“…The answer as to why this happens is not the purpose of this article. However, the literature data [25,26,[28][29][30][31][32] indicate a wide variety of solutions, and at least two careful considerations can be made. First, to decrease the influence of the radiation at higher temperatures, a mineral opacifier has been loaded to the aerogel products, as observed by the presence of titanium and iron compounds were noticed in sample B and the Pyrogel® (Table 4).…”

Section: Thermal Conductivity Testmentioning

confidence: 99%

Aerogel insulation materials for industrial installation: properties and structure of new factory-made products

Miros

Psiuk

Szpikowska‐Sroka

2017

J Sol-Gel Sci Technol

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In this article the comparisons of two new factory-made Chinese aerogel products with the Pyrogel® product, all available on the market, are presented. The aerogel products are in a flexible blanket form and all products are dedicated for high temperature applications. The properties of the samples such as their dimension stability, water vapour transmission and water absorption are also described. Additionally the microstructure and chemical composition of the products are analysed using SEM/ EDS (scanning electron microscopy coupled with X-ray energy-dispersive spectroscopy). The differences in the maximum service temperature are presented. The internal self-heating of the aerogel samples is described and is compared to a similar effect observed in mineral wool samples. The results in the change of the thermal properties in a wide range of temperatures (+ 10-600°C) are shown. The obtained results are correlated with the mineral wool data. The correlation shows an advantage in a highefficiency thermal performance of aerogel products compared to other insulation materials at high temperatures. Graphical Abstract

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“…It is therefore common to add glass or ceramic fibers to increase the structural integrity of the porous insulation compacts [1][2][3][4]. Silicon carbide or nanostructured titania powers [2,5] are also added as an opacifier.…”

Section: Introductionmentioning

confidence: 99%

Effect of resin infiltration on fumed silica-based thermal insulations

Kim

Park

et al. 2010

Res Chem Intermed

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The thermal conductivities and the strengths of fumed silica-based thermal insulations prepared by the dry process and the resin infiltration method have been studied. Infiltration of the insulation samples prepared by dry processing of mixtures, consisting of fumed silica, ceramic fiber and a SiC opacifier, was performed to strengthen their binding structure. The high temperature thermal conductivities for the insulation samples obtained by the resin infiltration method were similar to those for the samples prepared by the dry process. On the other hand, the bending strengths for the former were superior to those for the latter. However, the resin-infiltrated samples were more brittle than the samples obtained by the dry process due to the occurrence of rigid bonding between the fibers and the infiltrated resin in the porous insulations. The thermosetting resin solution infiltration method appeared to be applicable to producing a dust-free fumed silica-based thermal insulation.

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Monolithic silica aerogel insulation doped with TiO2 powder and ceramic fibers

Cited by 134 publications

References 4 publications

Effects of Powder Additives on Thermal Shrinkage of Nanoporous Silica Insulation

Effects of Powder Additives on Thermal Shrinkage of Nanoporous Silica Insulation

Aerogel insulation materials for industrial installation: properties and structure of new factory-made products

Effect of resin infiltration on fumed silica-based thermal insulations

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