The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform
Natalia I Gonzalezpech - One of the best experts on this subject based on the ideXlab platform.
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nb tio2 polymer hybrid solar cells with photovoltaic response under Inert Atmosphere conditions
Solar Energy Materials and Solar Cells, 2010Co-Authors: Monica Liracantu, Mahbube K Siddiki, David Munozrojas, Roger Amade, Natalia I GonzalezpechAbstract:Hybrid Solar Cells (HSC) applying Nb-TiO2 in direct contact with a conducting organic polymer, MEH-PPV, show higher stability than the bare TiO2-based HSC when analyzed under Inert Atmosphere conditions. IPCE analyses revealed that Inert Atmospheres affect directly the semiconductor oxide in the first stages of the analyses but photovoltaic performance stabilizes after several hours. A 20 wt% Nb-doped TiO2 presented the highest stability and photovoltaic properties. The behavior has been attributed to the solubility limit of Nb within the TiO2 beyond 20 wt% doping level where the co-existence of NbO2 is observed. The HSCs were analyzed under controlled N2 Atmosphere and 1000 W/m2 (AM 1.5) irradiation.
Thomas Bauer - One of the best experts on this subject based on the ideXlab platform.
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Hot corrosion behavior of commercial alloys in thermal energy storage material of molten MgCl2/KCl/NaCl under Inert Atmosphere
Solar Energy Materials and Solar Cells, 2018Co-Authors: Wenjin Ding, Alexander Bonk, Alfons Weisenburger, Adrian Jianu, Thomas BauerAbstract:Hot corrosion behavior of three commercial alloys (stainless steel SS 310, Incoloy 800 H, Hastelloy C-276) in molten MgCl2/NaCl/KCl (60/20/20 mol%) under Inert Atmosphere was investigated by immersion tests at 700 °C for 500 h. SS 310 exhibited the highest corrosion rate, while Hastelloy C-276 showed the best corrosion resistance. All the studied alloys could not meet the requirements for commercial application (i.e., corrosion rate
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hot corrosion behavior of commercial alloys in thermal energy storage material of molten mgcl2 kcl nacl under Inert Atmosphere
Solar Energy Materials and Solar Cells, 2018Co-Authors: Wenjin Ding, Alexander Bonk, Alfons Weisenburger, Adrian Jianu, Thomas BauerAbstract:Hot corrosion behavior of three commercial alloys (stainless steel SS 310, Incoloy 800 H, Hastelloy C-276) in molten MgCl2/NaCl/KCl (60/20/20 mol%) under Inert Atmosphere was investigated by immersion tests at 700 °C for 500 h. SS 310 exhibited the highest corrosion rate, while Hastelloy C-276 showed the best corrosion resistance. All the studied alloys could not meet the requirements for commercial application (i.e., corrosion rate < 10 µm/year for 30 year's lifetime). Microstructural analysis on the exposed alloy specimens using SEM, EDX and XRD shows that Cr was dissolved preferentially than Fe and Ni to form a corrosion layer with a porous structure during the corrosion. Moreover, the corrosion products (e.g., MgO, MgCr2O4, etc.) precipitated on the surface of the exposed specimens, as well as in the pores of the Cr-depleted corrosion layer. For SS 310 containing 2 wt% Si, Si was also dissolved and corrosion products containing Si were observed in the pores of the corrosion layer. Based on these findings, an impurity-driven corrosion mechanism is proposed to describe the hot corrosion behavior of the studied alloys in molten MgCl2/NaCl/KCl under Inert Atmosphere, which could assist the development of corrosion mitigation technologies in future work.
Monica Liracantu - One of the best experts on this subject based on the ideXlab platform.
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nb tio2 polymer hybrid solar cells with photovoltaic response under Inert Atmosphere conditions
Solar Energy Materials and Solar Cells, 2010Co-Authors: Monica Liracantu, Mahbube K Siddiki, David Munozrojas, Roger Amade, Natalia I GonzalezpechAbstract:Hybrid Solar Cells (HSC) applying Nb-TiO2 in direct contact with a conducting organic polymer, MEH-PPV, show higher stability than the bare TiO2-based HSC when analyzed under Inert Atmosphere conditions. IPCE analyses revealed that Inert Atmospheres affect directly the semiconductor oxide in the first stages of the analyses but photovoltaic performance stabilizes after several hours. A 20 wt% Nb-doped TiO2 presented the highest stability and photovoltaic properties. The behavior has been attributed to the solubility limit of Nb within the TiO2 beyond 20 wt% doping level where the co-existence of NbO2 is observed. The HSCs were analyzed under controlled N2 Atmosphere and 1000 W/m2 (AM 1.5) irradiation.
W J Botta - One of the best experts on this subject based on the ideXlab platform.
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mechanical activation of tife for hydrogen storage by cold rolling under Inert Atmosphere
International Journal of Hydrogen Energy, 2018Co-Authors: L E R Vega, Daniel Rodrigo Leiva, Tomaz Toshimi Ishikawa, R Leal M Neto, W B Silva, R A Silva, Claudio Shyinti Kiminami, W J BottaAbstract:Abstract TiFe is a very interesting material for hydrogen storage in the solid state, due to its hydrogen capacity of 1.9 wt % and to the fact it can be absorb/desorb hydrogen at room temperature. However, the TiFe produced by casting does not absorb hydrogen, unless a procedure called activation is applied, which is based on a repetition of several thermal cycles. This study evaluates the effects of a mechanical activation route for the TiFe intermetallic compound, namely, cold rolling (CR) under Inert Atmosphere. Stoichiometric TiFe was prepared from elementary powders by arc melting. Ingot was grinded and then cold rolled for 20 and 40 passes under argon inside a glove box, with moisture and oxygen contents below 0.1 ppm. Cold rolled samples consisted of two parts: powder particles and thin cracked flakes. The results showed that mechanically activated samples by CR exhibited rapid absorption of hydrogen at room temperature, without using a thermal activation process. In general, the average storage capacity of hydrogen was 1.4 wt% H2 for the first absorption, regardless of the number of passes for both flake and powder samples.
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cold rolling under Inert Atmosphere a powerful tool for mg activation
International Journal of Hydrogen Energy, 2014Co-Authors: Ricardo Floriano, Daniel Rodrigo Leiva, J A Carvalho, Tomaz Toshimi Ishikawa, W J BottaAbstract:Abstract In the present work, we report results from a new processing route for Mg: cold rolling under Inert Atmosphere, followed by a short-time HEBM step (CR + HEBM). This processing route is presented as a powerful tool to reduce the activation time for Mg hydrogenation samples with no need to introduce any additives. Mg samples were extensively processed by CR and CR + HEBM and their effects on the microstructure and hydrogen storage properties were studied. The Mg samples processed by CR + HEBM presented refined microstructure (grain sizes around 4–7 nm), strong texture and are certainly free of oxide layer formation. These conditions lead to relatively fast activation kinetics and enhanced kinetics behavior that has not been reported in the literature so far.
Mahbube K Siddiki - One of the best experts on this subject based on the ideXlab platform.
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nb tio2 polymer hybrid solar cells with photovoltaic response under Inert Atmosphere conditions
Solar Energy Materials and Solar Cells, 2010Co-Authors: Monica Liracantu, Mahbube K Siddiki, David Munozrojas, Roger Amade, Natalia I GonzalezpechAbstract:Hybrid Solar Cells (HSC) applying Nb-TiO2 in direct contact with a conducting organic polymer, MEH-PPV, show higher stability than the bare TiO2-based HSC when analyzed under Inert Atmosphere conditions. IPCE analyses revealed that Inert Atmospheres affect directly the semiconductor oxide in the first stages of the analyses but photovoltaic performance stabilizes after several hours. A 20 wt% Nb-doped TiO2 presented the highest stability and photovoltaic properties. The behavior has been attributed to the solubility limit of Nb within the TiO2 beyond 20 wt% doping level where the co-existence of NbO2 is observed. The HSCs were analyzed under controlled N2 Atmosphere and 1000 W/m2 (AM 1.5) irradiation.
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Nb-TiO2/polymer hybrid solar cells with photovoltaic response under Inert Atmosphere conditions
Solar Energy Materials and Solar Cells, 2010Co-Authors: Monica Lira-cantu, Mahbube K Siddiki, Roger Amade, David Muñoz-rojas, Natalia I. González-pechAbstract:Hybrid Solar Cells (HSC) applying Nb-TiO2 in direct contact with a conducting organic polymer, MEH-PPV, show higher stability than the bare TiO2-based HSC when analyzed under Inert Atmosphere conditions. IPCE analyses revealed that Inert Atmospheres affect directly the semiconductor oxide in the first stages of the analyses but photovoltaic performance stabilizes after several hours. A 20 wt% Nb-doped TiO2 presented the highest stability and photovoltaic properties. The behavior has been attributed to the solubility limit of Nb within the TiO2 beyond 20 wt% doping level where the co-existence of NbO2 is observed. The HSCs were analyzed under controlled N2 Atmosphere and 1000 W/m2 (AM 1.5) irradiation.