Silicon graphite-like

Fig. Id. Structures of binary disilicides of alkaline earth and rare earth metals EuSij., crystallizing with graphite-like silicon layers...

Silicon so prepared reacts with water to give SiOz and hydrogen. It has been suggested that it is a graphite-like allotrope, but proof is as yet lacking, and its reactivity may be due to a state of extreme subdivision as in certain reactive forms of amorphous carbon. 

Figure 13.10. En route to hypothetical "graphite-like" silicon.

The upper left situation in Figure 13.10 is the least condensed member and the hypothetical "graphite-like silicon" the most highly condensed one. Based on the above described understanding of charge stabilization and planarity, a... 

Commercial DND isolated from detonation carbon is supplied in the form of suspensions and dry powders. This material usually contains 0.1-0.7 wt% graphite-like carbon, as well as, depending on the actual conditions of the synthesis procedure chosen, up to 1 wt% iron salts, silicon, and titanium oxides originating from the components of the equipment in which the synthesis and subsequent isolation of DND from the detonation carbon are performed. 

The non-metals considered are boron and silicon. The corresponding binary nitrides, BN, either in the graphite-like or diamond-like form, and Si3N4 are well-known as high-performance materials owing to excellent thermal, electrical, mechanical and chemical properties. Their low reactivity explains that ternary nitrides with lanthanides are only... 

There are several possible reasons why the overall rate of electron transfer is slow. Occasionally, it is because the electrode is a poor conductor, such as semiconductors like silicon or poor metals such as tungsten (see SAQ 2.6). Fabricating an electrode from metals such as platinum, gold, or from metallic conductors such as graphite or glassy carbon, will circumvent that possibility. 

Zinc oxide in solid or fine particle form is kept in a reactor cavity that is subjected to irradiation from solar concentrators [92], The dissociation products are zinc (vapor) and oxygen for this first reaction AG=0 at about 2235K [91], The reactor is made of materials like inconel steel, zirconia, silicon carbide or graphite [68,89,92], The graphite is used in special designs to avoid direct contact with chemical species [68], The dissociation products are then cooled rapidly to separate zinc and oxygen, transporting the... 

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