Green density temperature dependence

Figure 13 Temperature dependence of density versus depth in the lower mantle for candidate bulk compositions for the basaltic layer (red) the underlying harzburgite layer (green) and the basal Uierzolite (blue). Note that temperature sensitivity falls with increasing depth.

Figure 10.10 Temperature dependence of sintered density for an agglomerated or as-received and agglomerate-free yttria-stabilized zirconia powder (Ih). Eliminating the agglomerates in the green body resulted in a powder compact that densified much more readily. " ...

Very similar results can be easily obtained using the apparent disconti- nuities observed at the phase separation, in the temperature dependence of the density or static dielectric constant. The top critical point of the co existence curve corresponds to a mixture containing Xc=63.5 0.1 mole% of water and to the temperature (272.05 + 0.10)K from the visual observations and the density measurements. The static dielectric constant measurements however led to a slightly upper critical temperature of (272.20 0.10)K. The value of the experimental critical temperature is dependent of the chosen order parameter (Yvon, 1972). The difference in density Ap, volume fraction A ApZp(water)- p (acetonitrile), as suggested by Green (1978), and static dielectric constant AS are well fitted for the reduced temperature t=(T -T )/T < 0.01 by the expressionAp= BtP. The critical exponent (3 characterises the approach to zero of the difference in order parameter (p) between the two mutual compositions for which transition occurs at the same temperature Tt< T. The results of the analysis are given in Table 1,... 

Treatment of wood with polyethylene glycol (PEG) is the most commonly used method to impart dimensional stability to wood. PEG in a water solution can be used to permeate the lumens and penetrate the cell wall. A 30-50 percent solution of PEG in water generally is used on green wood no pressure is required. Treatment times are adjusted so that a uniform uptake of 25-30 percent of PEG is achieved, based on the dry weight of the wood temperatures range from 21 to 60°C. The wood may require weeks of soaking, depending on species, density, and thickness. After treatment, the wood is dried in a well-ventilated space, preferably heated. 

The main characteristics of the green mixture used to control the CS process include mean reactant particle sizes, size distribution of the reactant particles reactant stoichiometry, j, initial density, po size of the sample, D initial temperature, Tq dilution, b, that is, fraction of the inert diluent in the initial mixture and reactant or inert gas pressure, p. In general, the combustion front propagation velocity, U, and the temperature-time profile of the synthesis process, T(t), depend on all of these parameters. The most commonly used characteristic of the temperature history is the maximum combustion temperature, T -In the case of negligible heat losses and complete conversion of reactants, this temperature equals the thermodynamically determined adiabatic temperature (see also Section V,A). However, heat losses can be significant and the reaction may be incomplete. In these cases, the maximum combustion temperature also depends on the experimental parameters noted earlier. 

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