Preparation and study of structural properties, transition temperature and thermal conductivity of the HgBa2Ca2Cu3O8+δ and HgBa2CaCu2O6+δ nanomaterial compounds.

In this paper, using the solid-state reaction technique, high-temperature nanomaterial's superconductors HgBa2Ca2Cu3O8+δ and HgBa2CaCu2O6+δ, have been effectively created. At 850 °C, samples were sintered. By calculating the current and voltage as a function of temperature using the four probes method to determine the transition temperatures Tc(onset) and Tc(offset), the continuous electrical properties were explored. Where it was discovered that for the HgBa2Ca2Cu3O8+δ compound, the electrical resistivity has a gradient Tc(onset) (the beginning) at 145 K but zeroes out at Tc(offset) = 128 K. The temperature Tc(onset) (beginning) for the HgBa2CaCu2O6+δ compound was 137 K, whereas the temperature Tc(offset) was zero at 115 K. Using a Lee disk, thermal conductivity was measured. It was found that the thermal conductivity increased in direct proportion to temperature. The sample of the compound (HgBa2Ca2Cu3O8+δ) (Hg-1223) has a curve that begins at a temperature (40 ° C), thermal conductivity (0.878970388), and ends at a point (0.901118234) with a temperature (280 °C). This curve is higher than the curve of the compound (HgBa2CaCu2O6+δ) (Hg-1212) has a curve that begins at a temperature (40 ° C), thermal conductivity (0.878027444), and ends at a point (0.895530) with a temperature (280 °C). In order to analyze the structural qualities, X-ray diffraction analysis was used. The findings demonstrated that both compounds have a tetragonal crystal structure with distinct differences in the crystal lattice characteristics. [ABSTRACT FROM AUTHOR]