scholarly journals Fabrication of ZnO Nanowires Arrays by Anodization and High-Vacuum Die Casting Technique, and Their Piezoelectric Properties

Sensors ◽  
2016 ◽  
Vol 16 (4) ◽  
pp. 431 ◽  
Author(s):  
Chin-Guo Kuo ◽  
Ho Chang ◽  
Jian-Hao Wang
Keyword(s):  
Piezoelectric Properties ◽  
Die Casting ◽  
High Vacuum ◽  
Zno Nanowires ◽  
Casting Technique ◽  
Vacuum Die Casting

Fabrication of a Pb-Sn nanowire array gas sensor using a novel high vacuum die casting technique

2013 ◽  
Vol 9 (4) ◽  
pp. 481-484 ◽  
Author(s):  
Chin-Guo Kuo ◽  
Ho Chang ◽  
Lih-Ren Hwang ◽  
Shu Hor ◽  
Jia-Shin Chen ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Die Casting ◽  
Nanowire Array ◽  
High Vacuum ◽  
Casting Technique ◽  
Vacuum Die Casting

Investigations of the High Vacuum Die Castings of Dumbbell Specimens

2009 ◽  
Vol 628-629 ◽  
pp. 727-734
Author(s):  
Rong Yuan Jou
Keyword(s):  
Die Casting ◽  
High Vacuum ◽  
Testing Machine ◽  
Casting Process ◽  
Process Use ◽  
Vacuum Die Casting ◽  
Small Feature ◽  
Visualization Experiments ◽  
Die Casting Process ◽  
Die Castings

Compare to atmosphere die casting or moderate vacuum die casting process, use of the high vacuum die casting can enhance excluding gas volumes in the mold, improve the casting mechanical properties and density, and increase the fabrication feasibility for casting small feature size, shape, and higher quality of product. The process of high vacuum die casting for dumbbell specimens is established and implemented for evaluation of this innovative manufacturing technology. A transparent acrylic mold is fabricated to investigate the vacuum injection for vacuum die casting process and a metal mold is fabricated to test the real manufacturing of high vacuum die casting. To visualize the flowing pattern inside the mold under the consequence of evacuation processing, flow visualization experiments are conducted. Then, the specimen is molded by the high vacuum die casting process and the specimen castings are test by a universal testing machine for its loading-elongation relationship. The porosities of specimen casting are examined by scale weighting and direct visual inspection ways. Experimental results show that the high vacuum die casting process is effective to reduce the porosity (5.47% increment in weight) and to increase the strength (4.83% increment in maximum stress) of the investigated specimen. An obviously vortex roll is established along the centerline position of dumbbell specimen which may be became the source of porosity in real processing. Meanwhile, an excellent vacuum sealing is critical to the success of high vacuum die casting.

scholarly journals Fabrication of a Zinc Aluminum Oxide Nanowire Array Photoelectrode for a Solar Cell Using a High Vacuum Die Casting Technique

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Chin-Guo Kuo ◽  
Jung-Hsuan Chen ◽  
Yueh-Han Liu
Keyword(s):  
Aluminum Alloy ◽  
Aluminum Oxide ◽  
Die Casting ◽  
Nanowire Array ◽  
High Vacuum ◽  
Hydraulic Pressure ◽  
Characteristic Analysis ◽  
X Ray ◽  
Vacuum Die Casting ◽  
Zinc Aluminum Oxide

Zinc aluminum alloy nanowire was fabricated by the vacuum die casting. Zinc aluminum alloy was melted, injected into nanomold under a hydraulic pressure, and solidified as nanowire shape. Nanomold was prepared by etching aluminum sheet with a purity of 99.7 wt.% in oxalic acid solution. A nanochannel within nanomold had a pore diameter of 80 nm and a thickness of 40 μm. Microstructure and characteristic analysis of the alumina nanomold and zinc-aluminum nanowire were performed by scanning electron microscope, X-ray diffraction analysis, and energy dispersive X-ray spectroscopy. Zinc aluminum oxide nanowire array was produced using the thermal oxidation method and designed for the photoelectrode application.

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