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Wyszukujesz frazę "tantalum" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Production of High-Purity Tantalum Metal Powder for Capacitors Using Self-Propagating High-Temperature Synthesis
Autorzy:
Lee, Yong-Kwan
Sim, Jae-Jin
Byeon, Jong-Soo
Lee, Yong-Tak
Cho, Yeong-Woo
Kim, Hyun-Chul
Heo, Sung-Gue
Lee, Kee-Ahn
Seo, Seok-Jun
Park, Kyoung-Tae
Powiązania:
https://bibliotekanauki.pl/articles/2049150.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tantalum
self-propagating high-temperature synthesis
tantalum oxide
magnesium
capacitor
Opis:
In this study, high-purity tantalum metal powder was manufactured via self-propagating high-temperature synthesis. During the process, Ta2O5 and Mg were used as the raw material powder and the reducing agent, respectively, and given that combustion rate and reaction temperature are important factors that influence the success of this process, these factors were controlled by adding an excessive mass of the reducing agent (Mg) i.e., above the chemical equivalent, rather than by using a separate diluent. It was confirmed that Ta metal powder manufactured after the process was ultimately manufactured 99.98% high purity Ta metal powder with 0.5 μm particle size. Thus, it was observed that adding the reducing reagent in excess favored the manufacture of high-purity Ta powder that can be applied in capacitors.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 4; 935-939
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of 4N5 Grade Tantalum Wire from Tantalum Scrap by EBM and Drawing
Autorzy:
Yu, Ji-Won
Choi, Sang-Hoon
Sim, Jae-Jin
Lim, Jae-Hong
Seo, Kyoung-Deok
Hyun, Soong-Keon
Kim, Tae-Youb
Gu, Bon-Woo
Park, Kyoung-Tae
Powiązania:
https://bibliotekanauki.pl/articles/353005.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
electron beam melting
drawing
tantalum scrap
recycling
high purity
Opis:
Electron beam melting(EBM) is a useful technique to obtain high-purity metal ingots. It is also used for melting refractory metals such as tantalum, which require melting techniques employing a high-energy heat source. Drawing is a method which is used to convert the ingot into a wire shape. The required thickness of the wire is achieved by drawing the ingot from a drawing die with a hole of similar size. This process is used to achieve high purity tantalum springs, which are an essential component of lithography lamp in semiconductor manufacturing process. Moreover, high-purity tantalum is used in other applications such as sputtering targets for semiconductors. Studies related to recycling of tantalum from these components have not been carried outuntil now. The recycling of tantalum is vital for environmental and economic reasons. In order to obtain high-purity tantalum ingot, in this study impurities contained in the scrap were removed by electron beam melting after pre-treatment using aqua regia. The purity of the ingot was then analyzed to be more than 4N5 (99.995%). Subsequently, drawing was performed using the rod melted by electron beam melting. Owing to continuous drawing, the diameter of the tantalum wire decreased to 0.5 mm from 9 mm. The hardness and oxygen concentration of the tantalum ingot were 149 Hv and less than 300 ppm, respectively, whereas the hardness of the tantalum wire was 232.12 Hv. In conclusion, 4N5 grade tantalum wire was successfully fabricated from tantalum scrap by EBM and drawing techniques. Furthermore, procedure to successfully recycle Tantalum from scraps was established.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 3; 935-941
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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