Synthesis, single crystal growth and properties of $Sr_5Pb_3ZnO_{12}$

TL;DR

This paper reports the synthesis, crystal structure analysis, and electrical and thermal properties of a new oxide compound, Sr5Pb3ZnO12, demonstrating its potential as a dielectric material.

Contribution

The study introduces a new Sr5Pb3ZnO12 compound, details its crystal structure, and characterizes its dielectric and thermal properties, expanding knowledge of related oxide materials.

Findings

Sr5Pb3ZnO12 is a dielectric with high permittivity (ε_r = 22 at 300K).

The compound has an activation energy of dielectric relaxation of 0.80 eV.

Heat capacity measurements yield a Debye temperature of 324 K.

Abstract

The novel $Sr_5Pb_3ZnO_{12}$ oxide was synthesized by the solid-state reaction method. The crystal structure was studied by means of the powder x-ray diffraction Rietveld method and was found to be similar to 3 other previously known $Sr_5Pb_3MO_{12}$ compounds (M = Co, Ni, Cu). Crystals of several hundred microns in size of the new phase were grown in molten sodium chloride and imaged using confocal optical and scanning electron microscopy. Electrical properties were studied using the impedance spectroscopy technique. It was found that $Sr_5Pb_3ZnO_{12}$ is a dielectric material with rather high relative permittivity ($\epsilon_r$ = 22 at 300K) and with activation energy of the dielectric relaxation process $E_A$ = 0.80(4) eV. The heat capacity studies reveal the Debye temperature $\Theta_D$ = 324(1) K.