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Carbon macrostructure

Figure 1.2 Summary of the processes of carbon formation in the liquid phase and the resulting carbon macrostructures. Figure 1.2 Summary of the processes of carbon formation in the liquid phase and the resulting carbon macrostructures.
Fourth lesson - combination of different compounds in unique macrostructure provides unique performance properties. Starch is used extensively in nature to store carbon and energy. Starch is readily digested and must be protected from degradation by a resistant coating, for example, a seed (e.g. com, wheat or rice) or a skin (e.g. potato). Woody materials such as trees, soft plants and grasses are composed of a complex combination of aliphatic and aromatic compounds (cellulose, hemicellulose and lignin). [Pg.604]

Neither of the above theories takes the macrostructure of carbon black into account in any quantitative way, although in practice this is crucial in selecting a material for a particular application. Sheng (1980) was, however, able to develop the first of these theories and extend its range of applicability. He noted the well-established model for hopping conduction by tunnelling... [Pg.274]

The macrostructure level of carbon atom arrangement confers the most readily recognizable features on carbon materials, and it should not allow room for... [Pg.5]

The electronic or electrical properties of carbons are a most immediate consequence of their structure. The nanostructure anisotropy, and its degree of replication at the macrostructure level, is responsible for the entire range available here, from good conductors to effective insulators [72]. [Pg.16]

It follows from all above said that carbon particles interact with the lead active mass, being adsorbed on its surface and/or incorporated in the bulk of the lead skeleton branches. This results in macrostructural changes (reduced median pore radius and increased specific surface area of NAM). Thus, carbon additives alter the very nature of the lead electrode, converting it into a lead—carbon electrode, which will inevitably affect its electrochemical behaviour. The latter will depend on the affinity of carbon to lead, on the electrical conductivity of the carbon additive and on the electrochemical properties of the carbon surface. [Pg.333]

Vitreous carbon can be produced in three basic types which have essentially the same microstructure, but different macrostructures solid (or monolithic), foam (or reticulated), and spheres (or particles). Each type is reviewed in the next three sections. [Pg.131]

Amorphous carbon (Fig. 10.1b) is an assortment of carbon atoms in a non-crystalline, irregular and glassy state, which is essentially graphite but not held in a crystalline macrostructure. As with all glassy materials, some short-range order can be observed. It is the main constituent of substances such as charcoal, lampblack (soot) and activated carbon. In a crystallographic sense, however, these materials are not truly amorphous, but are... [Pg.372]


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See also in sourсe #XX -- [ Pg.5 ]




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Macrostructures

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