Controllable Seebeck Coefficients of a Metal-Diffused Aluminum Oxide Layer via Conducting Filament Density and Energy Filtering

2019 ◽  
Vol 11 (26) ◽  
pp. 23303-23312 ◽  
Author(s):  
No-Won Park ◽  
Dae Yun Kang ◽  
Won-Yong Lee ◽  
Yo-Seop Yoon ◽  
Gil-Sung Kim ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Oxide Layer ◽  
Conducting Filament ◽  
Seebeck Coefficients ◽  
Energy Filtering ◽  
Aluminum Oxide Layer

Deposition of aluminum oxide layer on GaN using diethyl aluminum ethoxide as a precursor

2008 ◽  
Vol 104 (1) ◽  
pp. 016103 ◽  
Author(s):  
Tsutomu Uesugi ◽  
Tetsu Kachi ◽  
Masahiro Sugimoto ◽  
Tetsuya Matsuyama ◽  
Chihoko Mizue ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Oxide Layer ◽  
Aluminum Oxide Layer

Development of Efficient Metal Catalyst Support

2007 ◽  
Vol 561-565 ◽  
pp. 547-550 ◽  
Author(s):  
Shouichi Muraoka ◽  
Kazuhiro Kitamura ◽  
Satoshi Kishi ◽  
Tatuo Nakazawa ◽  
Yasuo Shimizu
Keyword(s):  
Aluminum Oxide ◽  
Oxide Layer ◽  
Catalyst Support ◽  
Wire Mesh ◽  
Metal Catalyst ◽  
Oxide Surface ◽  
Low Oxygen ◽  
Metallic Catalyst ◽  
Aluminum Oxide Layer ◽  
Aluminum Oxide Surface

A new wire mesh metallic catalyst support has been studied by using a stainless heat resistant steel of including aluminum. This catalyst support was improved for the metal honeycomb catalyst support that had been put to practical use. The wire mesh catalyst support was made in the following procedures. First, it was made from flat plate made by the stainless steel from the machining. Second, the low oxygen atmosphere in the heat treatment furnace did the aluminum extraction processing. Third, the aluminum oxide layer was made on the surface of catalyst support by furnace in air. Metal honeycomb catalyst has been made for several years by this method. The aim of this study was to evaluate the aluminum oxide layer on the surface of wire mesh catalyst support. The aluminum oxide surface was measured using scanning electron microscopy (SEM) and X-ray reflection diffraction (XRD). This catalyst support has the performance similar to the conventional metal honeycomb catalyst support.

Microstructure and Interface Analysis of Glass Particulate Reinforced Aluminum Matrix Composite

2013 ◽  
Vol 795 ◽  
pp. 578-581 ◽  
Author(s):  
Shamsul Baharin Jamaludin ◽  
Josef Hadipramana ◽  
Mohd Fitri Mohd Wahid ◽  
Kamarudin Hussin ◽  
Azmi Rahmat
Keyword(s):  
Aluminum Oxide ◽  
Oxide Layer ◽  
Ageing Time ◽  
Solution Treatment ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composite ◽  
Artificial Ageing ◽  
Micro Cracks ◽  
The Matrix ◽  
Aluminum Oxide Layer

A characterization of microstructure and interface was made on the composites Al-4 % Cu reinforced with 15 wt. % glass particulate. The composite was fabricated by powder metallurgy followed by solution treatment and artificial ageing. The microstructures of the composite showed that the glass particulates were in-homogenously distributed in the matrix and segregated near copper. The aluminum oxide layer was found between aluminum, copper and glass particulate. Micro cracks were observed in the aluminum oxide layer and at the interface between aluminum oxide layer and aluminum. Hardness increased as ageing time increased. Interface behavior and aging time influenced the hardness of the composite.

Electrolytic Coloring of Anodized Aluminum by Copper

2013 ◽  
Vol 829 ◽  
pp. 381-385 ◽  
Author(s):  
Masume Nozari Nezhad ◽  
Alireza Kolahi ◽  
Mahmood Kazemzad ◽  
Maryam Saiedifar
Keyword(s):  
Aluminum Oxide ◽  
Oxide Layer ◽  
Pure Aluminum ◽  
Dye Molecules ◽  
X Ray Diffraction ◽  
Anodized Aluminum ◽  
Electrochemical Test ◽  
X Ray ◽  
Aluminum Oxide Layer ◽  
Galvanostatic Condition

It is important to generate aluminum oxide layer on the surface of aluminum in order to enhance the adhesion of the dye molecules in coloring aluminum industry. One of the major advantages of aluminum is the formation of a resistant oxide layer naturally, but the thickness of this layer is not high enough and it should be damaged due to lack of mechanical strength. However, the thickness of oxide layer can be increased through anodizing; this process improves its abrasion and corrosion resistance as well as its mechanical properties. In the present study, specimens of pure aluminum were anodized under galvanostatic condition in sulfuric acid electrolyte and porous nanostructured aluminum oxide layer was formed. Porosity of the anodized layer was controlled by optimizing the working conditions such as electrolyte concentration, anodizing time and current density. Finally, the specimens were electrolytically colored by applying alternating current to copper (Cu) solutions. Colored coatings were created at constant voltage and different coloring duration. The results indicated that the shade of different metal ions can be optimized by controlling the coloring parameters, the longer time of coloring results in the darker colors. The samples were examined by X-Ray Diffraction (XRD) spectroscopy and Scanning Electron Microscopy (SEM) and electrochemical test.

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