Resistivity of diamond

Diamond Hints, although not approaching bulk diamond, are harder than most refractory nitride and carbide thin films, which makes them attractive for tribological coatings. Transparency in the visible and infrared regions of the optical spectrum can be maintained and index-of-refraction values approaching that of bulk diamond have been measured. Electrical resistivities of diamond films have been produced within the full range of bulk diamond, and thermal conductivities equivalent to those of bulk diamond also have been achieved. As substrates for semiconductor electronic devices, diamond films can be produced by both the PACVD and IBRD techniques. 

The oxidation resistance of diamond particles and MWCNTs is markedly improved by SiC coating. 

The resistivity (a measure of electrical resistance) of graphite is (0.4 to 5.0) X 10-4 ohm-cm in the basal plane. (The basal plane is the plane of the six-membered rings of carbon atoms.) The resistivity is 0.2 to 1.0 ohm-cm along the axis perpendicular to the plane. The resistivity of diamond, 1014 to 1016 ohm-cm, is independent of direction. How can you account for this behavior in terms of the structures of graphite and diamond ... 

The extreme hardness and abrasion resistance of diamond makes this material an ideal choice for applications in which the optical components are exposed to aggressive environments. The use of diamond for optical elements for infrared seeking missiles and other military uses constitute probably the best examples of this type of application as discussed in more detail in this section. There are, however, a host of other applications in industry outside the military field in which the attributes of diamond optics are of great advantage. These include windows used in the monitoring of chemical reactions, or in the analysis of fluids which contain abrasive components. 

Diamond, due to its rigid crystalline network, is expected to be more stable than existing dimensionally stable anodes (DSAs). There are several reports on the stability and electrochemical treatment applications of diamond electrodes. Swain and coworkers have studied the morphological structural stability of diamond electrodes in both acidic and basic media [25,26]. The diamond films in their study were found to be dimensionally stable in both media, even at a current density of 0.5 A cm 2 for 20 h. However, when low quality diamond films, with significant sp impurities, were used, this harsh treatment resulted in the formation of pits at the grain boundaries. Ramesham and Rose [27] demonstrated the high corrosion resistance of diamond films in comparison to molybdenum, as well as noble metals such as Pt and Au. 

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