Theoretical kinetic studies for low temperature oxidation of two typical methylcyclohexyl radicals

2017 ◽  
Vol 182 ◽  
pp. 216-224 ◽  
Author(s):  
Lili Xing ◽  
Lidong Zhang ◽  
Feng Zhang ◽  
Jun Jiang
Keyword(s):  
Low Temperature ◽  
Kinetic Studies ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation

Low Temperature Oxidation of Cu-Base Leadframe and Cu/Emc Interface Adhesion

1996 ◽  
Vol 445 ◽  
Author(s):  
Soon-Jin Cho ◽  
Kyung-Wook Paik
Keyword(s):  
Low Temperature ◽  
Photoelectron Spectroscopy ◽  
Early Stage ◽  
Kinetic Studies ◽  
Oxide Thickness ◽  
Low Temperature Oxidation ◽  
Copper Oxidation ◽  
Temperature Oxidation ◽  
Pull Strength ◽  
20 Nm

AbstractLow temperature oxidation of a Cu-base leadframe has been investigated to understand the effect of Cu oxidation on the adhesion between Cu-base leadframes (Cu L/F) and epoxy molding compounds (EMC). From the kinetic studies on the oxidation, oxide growth was found to follow the parabolic rate law in the temperature range of 150 °C to 300 °C and the activation energy for the oxidation was 17.0 kcal/mol. X-ray photoelectron spectroscopy (XPS) studies confirmed that the oxide film consisted of Cu2O, CuO, and NiO. It was shown that the early stage of oxidation improved the adhesion strength. Furthermore the optimum copper oxide thickness required for the maximum pull strength ranged between 20 nm and 30 nm. The high pull strength was presumably due to the increase of surface wettability and mechanical interlocking effects resulting from copper oxidation.

scholarly journals Influence of Co-Precipitation Agent on the Structure, Texture and Catalytic Activity of Au-CeO2 Catalysts in Low-Temperature Oxidation of Benzyl Alcohol

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 641
Author(s):  
Lukasz Wolski ◽  
Grzegorz Nowaczyk ◽  
Stefan Jurga ◽  
Maria Ziolek
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Benzyl Alcohol ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Of Benzyl Alcohol ◽  
Key Factor ◽  
Au Particle Size ◽  
Co Precipitation

The aim of the study was to establish the influence of a co-precipitation agent (i.e., NaOH–immediate precipitation; hexamethylenetetramine/urea–gradual precipitation and growth of nanostructures) on the properties and catalytic activity of as-synthesized Au-CeO2 nanocomposites. All catalysts were fully characterized with the use of XRD, nitrogen physisorption, ICP-OES, SEM, HR-TEM, UV-vis, XPS, and tested in low-temperature oxidation of benzyl alcohol as a model oxidation reaction. The results obtained in this study indicated that the type of co-precipitation agent has a significant impact on the growth of gold species. Immediate co-precipitation of Au-CeO2 nanostructures with the use of NaOH allowed obtainment of considerably smaller and more homogeneous in size gold nanoparticles than those formed by gradual co-precipitation and growth of Au-CeO2 nanostructures in the presence of hexamethylenetetramine or urea. In the catalytic tests, it was established that the key factor promoting high activity in low-temperature oxidation of benzyl alcohol was size of gold nanoparticles. The highest conversion of the alcohol was observed for the catalyst containing the smallest Au particle size (i.e., Au-CeO2 nanocomposite prepared with the use of NaOH as a co-precipitation agent).

Low temperature oxidation of copper alloys—AEM and AFM characterization

2007 ◽  
Vol 42 (12) ◽  
pp. 4684-4691 ◽  
Author(s):  
Mari Honkanen ◽  
Minnamari Vippola ◽  
Toivo Lepistö
Keyword(s):  
Low Temperature ◽  
Copper Alloys ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation
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