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Wyszukujesz frazę "Al-Ghamdi, S." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Controlling of Optical Band Gap of Allyl Diglycol Carbonate Polymer with Ultraviolet Laser Radiation
Autorzy:
Farooq, W.
Baig, M.
Fatehmulla, A.
Al-Salhi, M.
Al-Ghamdi, S.
Yakuphanoglu, F.
Powiązania:
https://bibliotekanauki.pl/articles/1400395.pdf
Data publikacji:
2013-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.20.-e
61.82.Pv
61.80.Ba
Opis:
The effects of ultraviolet laser radiation on the structure and optical properties of allyl diglycol carbonate have been investigated. The allyl diglycol carbonate samples were irradiated with 266 nm with different power densities from Nd:YAG laser. The bulk etch rate enhancement and enlargement of track diameter clearly indicate that allyl diglycol carbonate is significantly affected by UV laser. The laser-irradiated allyl diglycol carbonate samples showed a decrease in the optical band gap with increasing laser power density. The obtained results indicate that the optical band gap of the alpha irradiated polymer is varied from 4.10 eV to 2.65 eV by UV laser irradiation.
Źródło:
Acta Physica Polonica A; 2013, 123, 1; 106-110
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics and applications of iron oxide reduction processes
Autorzy:
Halim, K.S. Abdel
El-Geassy, A .A.
Nasr, M. I.
Ramadan, Mohamed
Fathy, Naglaa
Al-Ghamdi, Abdulaziz S.
Powiązania:
https://bibliotekanauki.pl/articles/27315666.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ironmaking
iron oxides
reduction
extractive metallurgy
green hydrogen
Opis:
The present review handles the main characteristics of iron oxide reduction and its industrial applications. The reduction of iron oxide is the basis of all ironmaking processes, whether in a blast furnace or by direct reduction and/or direct smelting processes. The reduction characteristics of iron ores control the efficiency of any ironmaking process and the quality of the produced iron as well. Many controlling parameters should be considered when discussing the reducibility of iron ores such as equilibrium phase diagrams, reduction temperature, pressure, gas composition, and the nature of both iron ores and reducing agent. The different factors affecting the main routes of ironmaking will be highlighted in the present review to give a clear picture of each technology. Moreover, further innovations regarding the reduction of iron oxides such as the reduction by green hydrogen will be discussed.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 4; 81--92
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of Efficiency in CdS Quantum Dots Sensitized Solar Cells
Autorzy:
Wageh, S.
Al-Ghamdi, A.
Soylu, M.
Al-Turki, Y.
El Shirbeeny, W.
Yakuphanoglu, F.
Powiązania:
https://bibliotekanauki.pl/articles/1399329.pdf
Data publikacji:
2013-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
85.35.Be
88.40.hj
72.80.Vp
68.47.Gh
Opis:
CdS quantum dots were coated on $TiO_2$ layer by successive ionic layer adsorption and reaction method. An efficient photovoltaic energy conversion and significant quantum-size effect were observed. The magnitude of the short-circuit photocurrent density $J_{SC}$ was found to be approximately 6.01 $mA//cm^2$ for graphene oxide-incorporated $CdS//TiO_2$ solar cell, while the $J_{SC}$ of only CdS-sensitized solar cells was lower than 4.40 $mA//cm^2$. The efficiency of the $CdS//TiO_2$ solar cell with a graphene oxide layer containing CdS QDs was 60% higher than that of the $CdS//TiO_2$ solar cell. The cell efficiency was remarkably improved with the graphene oxide-incorporation. The carrier recombination of the QDs sensitized solar cells based on CdS-coated $TiO_2$ was significantly suppressed due to photogenerated charge carrier transports resulting from the presence of graphene oxide.
Źródło:
Acta Physica Polonica A; 2013, 124, 4; 750-754
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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