scholarly journals X-ray photoelectron spectroscopy analysis as a tool to assess factors influencing magnetic anisotropy type in Co/MgO system with gold interlayer

2018 ◽  
Vol 145 ◽  
pp. 50-53 ◽  
Author(s):  
Iraida N. Demchenko ◽  
Yevgen Syryanyy ◽  
Yevgen Melikhov ◽  
Laurent Nittler ◽  
Leszek Gladczuk ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Photoelectron Spectroscopy ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Factors Influencing

SiO2 films as heat resistant layers for protection of expandable polystyrene foam from flame torch–induced heat

2017 ◽  
Vol 31 (5) ◽  
pp. 657-667 ◽  
Author(s):  
S Varnagiris ◽  
S Tuckute ◽  
M Lelis ◽  
D Milcius
Keyword(s):  
Heat Resistance ◽  
Photoelectron Spectroscopy ◽  
Silicon Oxide ◽  
Plasma Generator ◽  
Expanded Polystyrene ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Heat Resistant ◽  
Pulsed Dc ◽  
Gas Atmosphere

Currently, polymeric insulation materials are widely used for energy saving in buildings. Despite of all benefits, these materials are generally sensitive to heat and highly flammable. This work discusses possibility to improve heat resistance of expanded polystyrene (EPS) foam using thin silicon dioxide (SiO2) films deposited by magnetron sputtering technique. In order to increase surface energy and adherence of SiO2 thin films to substrate EPS was plasma pretreated before films’ depositions using pulsed DC plasma generator for 40 s in argon gas. SiO2 formation was done in reactive argon and oxygen gas atmosphere. Laboratory made equipment was used for flame torch–induced heat resistance experiments. Results showed that silicon oxide films remains stable during heat resistance experiments up to 5 s and fully protects polystyrene (PS) substrate. Films are relatively stable for 30 s and 60 s and partially protect PS from melting and ignition. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy analysis confirmed that SiO2 layer, which is distributed uniformly on the EPS surface, could work as a good heat resistant material.

Effect of Sodium Metabisulfite on Selective Flotation of Chalcopyrite and Molybdenite

Minerals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1377
Author(s):  
Yuki Semoto ◽  
Gde Pandhe Wisnu Suyantara ◽  
Hajime Miki ◽  
Keiko Sasaki ◽  
Tsuyoshi Hirajima ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Separation Efficiency ◽  
Diesel Oil ◽  
Sodium Metabisulfite ◽  
Depressing Effect ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Selective Flotation

Sodium metabisulfite (MBS) was used in this study for selective flotation of chalcopyrite and molybdenite. Microflotation tests of single and mixed minerals were performed to assess the floatability of chalcopyrite and molybdenite. The results of microflotation of single minerals showed that MBS treatment significantly depressed the floatability of chalcopyrite and slightly reduced the floatability of molybdenite. The results of microflotation of mixed minerals demonstrated that the MBS treatment could be used as a selective chalcopyrite depressant in the selective flotation of chalcopyrite and molybdenite. Furthermore, the addition of diesel oil or kerosene could significantly improve the separation efficiency of selective flotation of chalcopyrite and molybdenite using MBS treatment. A mechanism based on X-ray photoelectron spectroscopy analysis results is proposed in this study to explain the selective depressing effect of MBS on the flotation of chalcopyrite and molybdenite.

scholarly journals X-ray photoelectron spectroscopy analysis of Ge-Sb-Se pulsed laser deposited thin films

2018 ◽  
Vol 101 (8) ◽  
pp. 3347-3356 ◽  
Author(s):  
Emeline Baudet ◽  
Christophe Cardinaud ◽  
Rémi Boidin ◽  
Aurélie Girard ◽  
Jan Gutwirth ◽  
...  
Keyword(s):  
Thin Films ◽  
Photoelectron Spectroscopy ◽  
Pulsed Laser ◽  
Spectroscopy Analysis ◽  
X Ray
Sign in / Sign up

Export Citation Format

Share Document