Thermal Conductivity Temperature-Pressure Dependence of Rocks and Ceramics

Effect of Structural Ordering, Temperature, and Pressure on Processes of Heat Transfer in Minerals and Alloys

“…Numerous data of our own [8][9][10] and from the literature [12][13][14][15][16][17][18][19][20][21] show that n = −1 for ordered minerals and alloys; n = −0.5 for partially ordered minerals and alloys; n = 0 when the degree of disorder in minerals and alloys is ε = 36.4% [18]; and n = 0.5 for when the structure of minerals and rocks is amorphous (with no long-range translational bonds between atoms). The temperature dependence of the efficient thermal conductivity of minerals and rocks thus lies within the narrow domain of to and provides an estimate of their degree of disorder ε.…”

“…In amorphous and glassy minerals and alloys with no long-range translational bonds between atoms, efficient thermal conductivity depends weakly on temperature. A review of the literature data [6][7][8][9][10][11] shows † Deceased.…”

“…Our recent works were dedicated to revealing the relationship between exponent n and other characteristics of a composite compound [8][9][10]. This work presents experimental results from determining the efficient thermal conductivity of sandstone samples (Aktash deposit, Republic of Dagestan: depth, 2970 m; density, 2.7 × 10 3 kg m −3 ; open porosity k = 5%) in the 273-523 K range of temperatures at a hydrostatic pressure of 0.1-400 MPa (measured using absolutely stationary flat plates [10]).…”

On the temperature and pressure dependences of the effective thermal conductivity of granites

“…In the general case, as shown in a number of our recent works (see, for example, [6,7], and also references in these publications), the temperature dependence of most natural and artificial composite materials at a fixed pressure is rather well described by a power law:…”