Thermal Conductivity of SiO2-Aerogel Tiles
The production of highly transparent silica aerogel tiles has been strongly motivated by high-energy physicists who wanted to use this material with low index of refraction in Cerencov counters . Today tiles of excellent optical quality with densities between about 75 and 300 g/l corresponding to indices of refraction between 1.015 and 1.060 and with sizes of 20 × 20 cm2 are available . Though these tiles might also have a potential as transparent superinsulating spacers in window systems in the future ,right now we consider them primarily as indispensable systems for investigations of the thermal transport in highly porous monolithic materials, which allow the optimization of cheaper granular aerogel fillings.
KeywordsContact Resistance Optical Thickness Radiative Heat Transfer Silica Aerogel Loss Coefficient
Unable to display preview. Download preview PDF.
- 1.G. Poelz, “Aerogel Cerenkov Counters at DESY”, DESY-Report 84–110 (1984) and references thereinGoogle Scholar
- 3.G. v. Dardel, S. Henning and L. Svensson, European Patent Specification 0018955 Bl, date of filing 17.04.80, date of publication 01. 12. 82Google Scholar
- 7.P. Scheuerpflug, R. Caps, D. Büttner and J. Fricke, “Apparent Thermal Conductivity of Evacuated SiO2 Aerogel Tiles Under Variation of Radiative Boundary Conditions”, Report E12-1284-1 (1984), accepted for publication in Int. J. Heat Mass TransferGoogle Scholar
- 8.P. Scheuerpflug, Diplom Thesis, University of Würzburg, 1985 (unpublished)Google Scholar
- 10.D. Büttner, J. Fricke and H. Reiss, Vakuum-Technik 34, 3 (1985)Google Scholar
- 11.D. Büttner, J. Fricke and H. Reiss, “Thermal Conductivity of Evacuated Load Bearing Powder and Fiber Insulations Under Variable External Load”, High Temp.-High Pressure 17, in print (1985)Google Scholar
- 12.F. de Ponte, private communication and J. Thermal Insulation 84, 94 (1984)Google Scholar