Einwirkung von Silicium auf Wasser unterhalb 100°

Moissan, Henri; Siemens, F.

doi:10.1002/cber.190403702184

Cited by 3 publications

(4 citation statements)

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“…Reactions of silicon with sulfur,19 boron,25 and phosphorus19, 26 occur at comparably high temperatures (600–1000 °C, electric arc conditions). As expected, silicon hydrolysis slowly releases hydrogen to give SiO 2 ,27 but obviously needs activation by OH − ions28 and requires boiling water for completion of SiO 2 formation 29. Oxidation with diluted nitric acid fails,19 evidently because of protection of the material by the formed oxide layer on the surface 19.…”

Section: Introductionsupporting

confidence: 56%

Amorphous Silicon: New Insights into an Old Material

Spomer

Holl

Zherlitsyna

et al. 2015

Chemistry A European J

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Amorphous silicon is synthesized by treating the tetrahalosilanes SiX4 (X=Cl, F) with molten sodium in high boiling polar and non-polar solvents such as diglyme or nonane to give a brown or a black solid showing different reactivities towards suitable reagents. With regards to their technical relevance, their stability towards oxygen, air, moisture, chlorine-containing reaction partners RCl (R=H, Cl, Me) and alcohols is investigated. In particular, reactions with methanol are a versatile tool to deliver important products. Besides tetramethoxysilane formation, methanolysis of silicon releases hydrogen gas under ambient conditions and is thus suitable for a decentralized hydrogen production; competitive insertion into the MeO-H versus the Me-OH bond either yields H- and/or methyl-substituted methoxy functional silanes. Moreover, compounds, such as Men Si(OMe)4-n (n=0-3) are simply accessible in more than 75 % yield from thermolysis of, for example, tetramethoxysilane over molten sodium. Based on our systematic investigations we identified reaction conditions to produce the methoxysilanes Men Si(OMe)4-n in excellent (n=0:100 %) to acceptable yields (n=1:51 %; n=2:27 %); the yield of HSi(OMe)3 is about 85 %. Thus, the methoxysilanes formed might possibly open the door for future routes to silicon-based products.

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Section: Introductionsupporting

confidence: 56%

Amorphous Silicon: New Insights into an Old Material

Spomer

Holl

Zherlitsyna

et al. 2015

Chemistry A European J

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“…The Si-Zn phase diagram is a simple eutectic system with a eutectic at 692.2 K (419.2°C) and X Si = 0.001 according to the assessed phase diagram by Shukla et al [43] The liquidus of this system has been measured by gravimetric method [4,16,44] and by differential thermal analysis (DTA). [45,46] Figure 8 shows the a-T plot using the reported liquidus data [4,16,44,45] which gives a = 29,206 J/mol and b = 16.26 J/mol-K.…”

Section: F Si-zn Systemmentioning

confidence: 99%

“…[45,46] Figure 8 shows the a-T plot using the reported liquidus data [4,16,44,45] which gives a = 29,206 J/mol and b = 16.26 J/mol-K. These values are both greater than the previously reported values as a = 17,980.36 J/mol and b = 4.77 J/mol-K [4] and a = 20,980 J/mol and b = 9.20 J/mol-K. [47] The calculated liquidus curve for this system using the obtained liquidus constants is shown in Figure 9.…”

Section: F Si-zn Systemmentioning

confidence: 99%

“…The coordinates of this eutectic have been calculated as X Si = 9 9 10 À10 at 600 K (327°C). [49] The solubility of silicon in molten lead has been measured by Moissan and Siemens [44] and Thurmond and Kowalchik [4] using a gravimetric technique. Applying the liquidus measurements, as was done recently for the Si-Pb system, [4] the a-T plot shown in Figure 14 is obtained.…”

Section: Si-pb Systemmentioning

confidence: 99%

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Liquidus of Silicon Binary Systems

Safarian

Kolbeinsen

Tangstad

2011

Metall Mater Trans B

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Thermodynamic knowledge about liquid silicon is crucial for the production of solar-grade silicon feedstock from molten silicon. In the current study, liquidus for silicon binary alloys is formulated using a previously developed method in which the liquidus curve is calculated using two constants. The liquidus measurements for the silicon portion of the silicon alloys with Al, Ca, Mg, Fe, Ti, Zn, Cu, Ag, Au, Pt, Sn, Pb, Bi, Sb, Ga, In, Ni, Pd, Mn, and Rh are reviewed, and the consistent data were used to determine the liquidus constants. The liquidus curves for silicon binary systems are calculated and plotted. It is indicated that the calculated liquidus curves fit well with the experimental data. A correlation between the determined liquidus constants is also observed, which can be used to gain a better understanding of the thermodynamics of the silicon binary melts.

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Die Erzeugung von Gasen

Bertelsmann

Schuster

1930

Einführung in Die Technische Behandlung Gasförmiger Stoffe

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Einwirkung von Silicium auf Wasser unterhalb 100°

Cited by 3 publications

References 0 publications

Amorphous Silicon: New Insights into an Old Material

Amorphous Silicon: New Insights into an Old Material

Liquidus of Silicon Binary Systems

Die Erzeugung von Gasen

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