Pulsed CO2 laser-driven production of ultrafine silicon, silicon carbide, silicon nitride and silicon oxynitride powders

1989 ◽  
Vol 11 (3) ◽  
pp. 487-493 ◽  
Author(s):  
E. Borsella ◽  
L. Caneve ◽  
R. Fantoni ◽  
S. Piccirillo
2021 ◽  
Vol 4 ◽  
pp. 15-24
Author(s):  
L. P. Mileshko ◽  

The identity of the mechanisms of anodic oxide films formation on silicon, silicon carbide, and silicon nitride is proved, which can be used as the basis for the General theory of anodic oxidation of these materials. The processes of galvanostatic anodic oxidation of Si, SiC and Si3N4 in the intervals of linear dependence of the formation voltage on time proceed with activation control. The limiting stages in all cases are the anodic reactions of the formation of intermediate SiO monoxide. Preference should be given to electrolytes with lower values of the potential environmental hazard criterion of the electrolyte, which have a higher degree of environmental safety.


1993 ◽  
Vol 76 (6) ◽  
pp. 1621-1623 ◽  
Author(s):  
PeiPei Hsu ◽  
Sikyin Ip ◽  
Chan Park ◽  
Michael J. McNallan

1993 ◽  
Vol 8 (8) ◽  
pp. 1996-2003 ◽  
Author(s):  
C.A. Pickles ◽  
J.M. Toguri

Silicon-based ceramic whiskers, such as silicon carbide and silicon nitride, were produced in a plasma arc reactor. Silicon monoxide gas was generated by reacting briquettes of silica and carbon according to the following reaction: SiO2(s or l) + C(s) = SiO(g) + CO(g). The effects of operating variables on the production of silicon monoxide are discussed. The silicon monoxide gas was then back-reacted with carbon monoxide to produce silicon carbide whiskers according to the following reaction: SiO(g) + 3CO(g) = SiC(s) + 2CO2(g). In the presence of nitrogen, the product contained some silicon nitride and silicon oxynitride whiskers. The effects of gas composition and flow rate, crucible mass, and alkali additions on the amount and morphology of the whiskers were determined. It is concluded that the whiskers grew by a vapor-liquid-solid mechanism.


1977 ◽  
Vol 32 (1-2) ◽  
pp. 25-31 ◽  
Author(s):  
R. S. Bhattacharya ◽  
J. F. Van Der Veen ◽  
C. B. W. Kerkdijk ◽  
F. W. Saris

2002 ◽  
Vol 12 (5) ◽  
pp. 1606-1611 ◽  
Author(s):  
Gautam Gundiah ◽  
G. V. Madhav ◽  
A. Govindaraj ◽  
Md. Motin Seikh ◽  
C. N. R. Rao

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