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M. Kılıç - One of the best experts on this subject based on the ideXlab platform.
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The effective thermal conductivity of insulation materials reinforced with Aluminium Foil at low temperatures
Heat and Mass Transfer, 2012Co-Authors: N. Yüksel, A. Avcı, M. KılıçAbstract:The effective thermal conductivity (ETC) of multilayer thermal insulation materials was experimentally investigated as a function of temperature (0–25 °C). The materials consisted of binary/ternary glass wools or ternary expanded polystyrene foams reinforced with Aluminium Foil. The experimental measurements were performed using a guarded hot plate with temperature differences of 5, 10 and 15 °C. The results indicated that significant correlations exist between ETC and the characteristics of the materials with decreasing temperature. The ETC decreases with reinforcement with Aluminium Foil at the same temperature or with temperature differences of 5 and 15 °C. In addition, it was clearly observed that the ETC decreases sharply with decreased temperature. Consequently, reflective materials may reduce the ETC at low temperatures.
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The temperature dependence of effective thermal conductivity of the samples of glass wool reinforced with Aluminium Foil
International Communications in Heat and Mass Transfer, 2010Co-Authors: N. Yüksel, A. Avcı, M. KılıçAbstract:In this study, the temperature dependence of effective thermal conductivity (ETC) for samples of binary, ternary, and quadruple glass wools reinforced with Aluminium Foil was examined. The experiments were realized by the guarded hot plate in temperature differences of 5, 10 and 15 °C and the temperatures of 25 and 40 °C. The results revealed that in the case of reinforcing the Aluminium Foil, ETC increased with increasing the temperature or changing of temperature difference (5, and 15 °C). Also, an increase of additional layers decrease its' influence on low temperature. Consequently, reflectivity materials may increase or reduce ETC.
Mark J Burchell - One of the best experts on this subject based on the ideXlab platform.
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identification by raman spectroscopy of mg fe content of olivine samples after impact at 6kms 1 onto Aluminium Foil and aerogel in the laboratory and in wild 2 cometary samples
Geochimica et Cosmochimica Acta, 2013Co-Authors: N F Foster, Penelope J Wozniakiewicz, M C Price, A T Kearsley, Mark J BurchellAbstract:Abstract Olivine, (Mg, Fe)2[SiO4], is a common mineral in extraterrestrial materials, whose Mg–Fe content varies from the end-members Forsterite (Mg2SiO4: denoted ‘Fo’) to Fayalite (Fe2SiO4: denoted ‘Fa’), together with minor quantities of Ca, Cr, Mn and Ni. Olivine is readily identified by Raman spectroscopy, and the Mg–Fe content can be obtained by precise measurements of the position of the two strongest Raman peaks. Here we show that this is not only true for pristine and highly crystalline olivine, but also for grains which have undergone high pressure shock processing during hypervelocity impact. We demonstrate that there are subtle changes to the Raman spectra in grains impacted at 6.1 km s−1 onto Aluminium Foil and into low density aerogel. We quantify these changes, and also show that if no correction is made for the impact effects, the Fe:Mg molar ratio of the olivine can be significantly misinterpreted. This study was stimulated by NASA’s Stardust mission to comet 81P/Wild-2, since freshly ejected cometary dust particles were collected (via impact) onto Aluminium Foil and into aerogel cells at 6.1 km s−1 and these samples are being investigated with Raman spectroscopy. We identify the residue in one Stardust impact crater on Aluminium Foil as arising from an olivine with a composition of Fo97–100.
Dominique Averty - One of the best experts on this subject based on the ideXlab platform.
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Ultra light tunable capacitor based on PZT thin film deposited onto Aluminium Foil
Journal of Sol-Gel Science and Technology, 2013Co-Authors: Raynald Seveno, Dominique AvertyAbstract:Lead zirconate titanate (PZT) thin films with a Zr/Ti ratio of 57/43, elaborated by a derived sol-gel process, have been deposited onto bare and RuO2 coated Aluminium substrate 16 μm thick. Commercial Aluminium Foil presents many advantages as ultra light weight (43 g m−2), conformability, conduction, can be easily cut, and is one of the cheapest substrates used for PZT thin films deposition (
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ultra light tunable capacitor based on pzt thin film deposited onto Aluminium Foil
Journal of Sol-Gel Science and Technology, 2013Co-Authors: Raynald Seveno, Dominique AvertyAbstract:Lead zirconate titanate (PZT) thin films with a Zr/Ti ratio of 57/43, elaborated by a derived sol–gel process, have been deposited onto bare and RuO2 coated Aluminium substrate 16 μm thick. Commercial Aluminium Foil presents many advantages as ultra light weight (43 g m−2), conformability, conduction, can be easily cut, and is one of the cheapest substrates used for PZT thin films deposition (<0.1$ m-2). XRD measurements have shown a well crystallized PZT in the perovskite structure and ferroelectric behaviour has also been observed. By the use of a RuO2 film 100 nm thick at the PZT/Aluminium interface, the coercive field and tunability values have been strongly improved despite an increase of the dielectric losses. The lead excess introduced in the precursor solution has been increased up to 65 % in order to lower the crystallization temperature of the PZT around 560 °C and tunability has been studied as a function of annealing time and temperature.
N. Yüksel - One of the best experts on this subject based on the ideXlab platform.
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The effective thermal conductivity of insulation materials reinforced with Aluminium Foil at low temperatures
Heat and Mass Transfer, 2012Co-Authors: N. Yüksel, A. Avcı, M. KılıçAbstract:The effective thermal conductivity (ETC) of multilayer thermal insulation materials was experimentally investigated as a function of temperature (0–25 °C). The materials consisted of binary/ternary glass wools or ternary expanded polystyrene foams reinforced with Aluminium Foil. The experimental measurements were performed using a guarded hot plate with temperature differences of 5, 10 and 15 °C. The results indicated that significant correlations exist between ETC and the characteristics of the materials with decreasing temperature. The ETC decreases with reinforcement with Aluminium Foil at the same temperature or with temperature differences of 5 and 15 °C. In addition, it was clearly observed that the ETC decreases sharply with decreased temperature. Consequently, reflective materials may reduce the ETC at low temperatures.
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The temperature dependence of effective thermal conductivity of the samples of glass wool reinforced with Aluminium Foil
International Communications in Heat and Mass Transfer, 2010Co-Authors: N. Yüksel, A. Avcı, M. KılıçAbstract:In this study, the temperature dependence of effective thermal conductivity (ETC) for samples of binary, ternary, and quadruple glass wools reinforced with Aluminium Foil was examined. The experiments were realized by the guarded hot plate in temperature differences of 5, 10 and 15 °C and the temperatures of 25 and 40 °C. The results revealed that in the case of reinforcing the Aluminium Foil, ETC increased with increasing the temperature or changing of temperature difference (5, and 15 °C). Also, an increase of additional layers decrease its' influence on low temperature. Consequently, reflectivity materials may increase or reduce ETC.
K G Mcguigan - One of the best experts on this subject based on the ideXlab platform.
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effect of agitation turbidity Aluminium Foil reflectors and container volume on the inactivation efficiency of batch process solar disinfectors
Water Research, 2001Co-Authors: S C Kehoe, Tina Joyce, P Ibrahim, J B Gillespie, R A Shahar, K G McguiganAbstract:Abstract We report the results of experiments designed to improve the efficacy of the solar disinfection of drinking water, inactivation process. The effects of periodic agitation, covering the rear surface of the container with Aluminium Foil, container volume and turbidity on the solar inactivation kinetics of Escherichia coli (starting population=106 CFU ml−1) were investigated. It was shown that agitation promoted the release of dissolved oxygen from water with subsequent decrease in the inactivation rates of E. coli. In contrast, covering the rear surface of the solar disinfection container with Aluminium Foil improved the inactivation efficiency of the system. The mean decay constant for bacterial populations in Foil-backed bottles was found to be a factor of 1.85 (std. dev.=0.43) higher than that of non-Foil-backed bottles. Inactivation rates decrease as turbidity increases. However, total inactivation was achievable in 300 NTU samples within 8 h exposure to strong sunshine. Inactivation kinetics was not dependent on the volume of the water container for volumes in the range 500–1500 ml.