Conductivity vs. temperature

Figure 11.9. Conductivity vs temperature plot for two ionically conducting crystals and for a polymer electrolyte, LiTf-aPtO40, which is based on amorphous poly(ethylene) oxide (after Ratner...

Fig. 2.53 Thermal conductivity vs. temperature. Reprinted from Hetsroni et al. (2001b) with permission...

Figure 11. Plot of conductivity vs temperature for La2Sr4Ti60i9-(5 in dry and wet 5%H2/Ar. (Reprinted with permission from ref 145. Copyright 2003 Elsevier.)...

Conductivity vs. Temperature of Chlorine Trifluoride. The conductivity of chlorine trifluoride has been measured over the temperature range from near the boiling point (+11.3° C.) to —130° C. Figures 2 and 3 are plots of the conductivity as a function of temperature as the sample of chlorine trifluoride is cooled from the boiling point at a rate of approximately 2°-3° C. per minute. The conductivity increases slightly... 

Fig. VI-3 shows a schematie diagram of the electrical conductivity vs. temperature (In tr vs. In T) in the vicinity of the metal-insulator transition. Each of the curves shown in Fig. VI-3 is drawn for a different degree of disorder for a given conducting polymer system, each curve would represent data obtained from a sample with different resistivity ratio, Precisely at the critical point (where the mobility edge is precisely at the Fermi energy), the conductivity follows the power law of Eqn VI-6. On the metallic side, the resistivity remains finite as the temperature approaches zero as indicated in Eqn VI-5. On the insulating side, the resistivity falls below the power law as a result of the exponential dependence that results from variable range hopping see Eqn VI-8 and VI-9.

Table 2 summarizes [391 the electrical conductivity of several charge-transfer crystals, most of which have a definite Peierls transition to a semiconducting state below a temperature T. In some cases, however, there is instead a very broad maximum in the conductivity vs. temperature plot, and the compound retains its high conductivity to the lowest temperatures measured, without ever going superconducting. One such salt, Cu(DMDCNQI)2, even reaches ct = 5x 10 S cm at 0.5 K. 

Figure 15.4. Thennal expansion and electric conductivity vs. temperature for epoxy filled with 46 vol% titanium boride. [Data from Strumpler R, Maidorn (1, Garbin A, Ritzer L, Greuter F, Polym. < Polym. Composites, 4, No.5, 1996,299-304.]...

Infra-red absorption peaks due to resonance modes of NaCl Cu+ 154) were found to agree with the interpretation of the dips in the thermal conductivity vs. temperature curves28). Such effects on the thermal conductivity were earlier found by Walker and Pohl158) for KC1 I-. Resonance modes of the system NaCl Ag+ were detected... 

Results are described for three new highly conducting organic solids, all based on substituted TCNQ-derivatives TMTSF-2,5-dimethyl-TCNQ /TMTSF-DMTCNQ/ 1 1 shows "normal" conductivity vs.temperature behaviour, i.e. metallic conductivity at higher temperatures followed by a metal-semiconductor transition as the temperature is decreased below 5o K. 

In addition, the normalized conductivity vs temperature behaviour of the three compounds seems comparable. No "peaked" curve is seen, at most there are very broad maxima. 

It may be concluded that there is a strong correlation between conductivity vs temperature behaviour and structure for conducting solids of this kind. 

The results strongly indicate that a "peaked" conductivity vs temperature- curve is related to the "herring-bone" structure whereas the "four-nearest-neighbours" structure is characteristic for a solid with a less pronounced variation of the conductivity with temperature. 

Figure 2 Illustrates the conductivity vs temperature data obtained. Initially (Figure 2d), conductivities are low ( 10 -10 (ohm-cm) l), rising monotonlcally for temperatures between approximately 200-300°C. Samples may be heated to at least 300°C without altering the a vs 1/T curve obtained during subsequent cooling or heating below this temperature. However, a qualitative change In the temperature dependence of the conductivity occurs once the pyrolysis temperature Is raised above a critical value of approximately 390 C at which the conductivity Is seen to rise dramatically from 10 to 10 (ohm-cm) l. Previous reports on the conductivity of PAN did not note this behavior.(7, 17-22)...

FI. 32. Schematic representation of the structural elements of tellurium subhalides with regard to ele-mental Te—Te bonds above and electrical conductivity vs temperature plot of representative tellurium subhalides below The room temperature conductivity of pure iodine as well as the intrinsic conductivity lines of tellurium are indicated... 

F. 33. Electrical conductivity vs. temperature of TejCl, symbols refer to the corresponding number of various experiments in... 

Fig. 1. Schematic diagram of the viscosity and the thermal conductivity vs. temperature for a classical liquid.

Fig. 2. Liquid thermal conductivity vs. temperature in reduced coordinates.

Fig. 4. Thermal conductivity vs. temperature for epoxy resins having different cross-link...

Fig. 11. Survey picture of thermal conductivities vs. temperature of resins, powder-filled resins, and fiber composites.

FIGURE 8. Plots of conductivity vs. temperature for several UHTCs ... 

Figure 9.144 Thermal conductivity vs. temperature for Solvay Solexis Solef 1010— general purpose homopolymer molding and extrusion PVDF resin [16].

Figure 2.6 shows the ionic conductivity vs. temperature of a GPE in comparison with that of the liquid electrolyte with the same solvents and salt. 

Fig. It.1-tt6a,b Ge. Thermal conductivity vs. temperature, (a) 3-400 K, (b) 400-1200 K. Solid curve in (a) and data in (b) from [1.40] experimental data in (a) from [1.45]. Dashed line in (b), extrapolated lattice component...

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