Pyro-carbon

The samples of pyro-carbon (PC) were synthesized by the Central Research Institute of Materials (Russian Federation). [2]... 

The raw material for the synthesis was methane. Powder of Nickel carbonyl (NC) or powder of nano-diamond (ND) was the catalyst. Attempts to synthesize pyro-carbon on copper powder were not successful. Powder with the composition 70%PC, 30%NC, and also the set of powders with various ratios of PC and ND were tested. Anodes made of the powder 70PC30NC showed satisfactory cycle behavior and had specific capacity 180 mAh/(g of powder) (260 mA-h/(g 0f carbon)) (Fig. 3a). The anodes made of powder xPCyND, irrespective of the components ratio, had specific capacity... 

Figure 23>6 (a) 002 lattice fringes image on a cross section of a carbonized viscose fiber coated with pyrolytic carbon by CVD from propylene at 900°C. The continuous line shows the separation between a microporous carbon at the bottom (fiber) and the lamellar pyro-carbon at the top. The two insets represent a magnification of selected areas in these two parts, (b) Model showing the disordered nanotexture of the fiber and the lamellar and dense nanotexture of the coating. The coating acts as a barrier which hinders an easy diffusion of species to the core of the fiber. (Adapted from [22]). 

FIGURE 17 (a) Resistivity versus temperature plots for various forms of carbon (1) single crystal (2) HOPG (3) graphite whisker (4) pyrolytic carbon (5) petroleum coke carbon (6) lampblack base carbon (7) glassy carbon (8) electron evaporated carbon film, (b) Resistivity versus temperature plots for various forms of carbon including pyrolytic (1) pyro-carbon (2) pyrocarbon 2400°C (3) pyrocarbon 1900 C (4) coke and lampblack base carbon (5) annealed pyrocarbon 3000 C (6) annealed pyrographite [551. 

Formylphenoxyacetic acid added at 40° during 10 min. to diethyl pyro-carbonate, heated 3 hrs. at 80° until dissolved, more diethyl pyrocarbonate added, and heating continued for 2 hrs. ethyl 4-formylphenoxyacetate. Y 92.5%.—This mild method is particularly suited for compounds bearing additional reactive groups. F. e. and reactions s. W. Thoma and H. Rinke, A. 624, 30 (1959). 

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