Strength Characteristics of the Materials Based on n- and p-Type Solid Solutions of Bismuth and Antimony Chalcogenides Fabricated by Various Methods

Abstract—The mechanical compressive properties of the materials based on the n-type Bi2Te3–Bi2Se3 (20 mol % Bi2Se3) solid solution doped with Hg2Cl2 and the p-type Sb2Te3–Bi2Te3 (25 mol % Bi2Te3) solid solution doped with lead and excess tellurium (2 wt %) are studied. The samples are fabricated by hot pressing, extrusion, and spark plasma sintering of the powders prepared by melt spinning and grinding an ingot in a jet mill. Fractographs of cleavages are examined using electron scanning microscopy. The samples fabricated by the extrusion of a melt-spun powder have the highest ultimate strengths, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sigma _{{\text{u}}}^{{\text{c}}}$$\end{document} = 168 MPa (n-type conduction material) and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\sigma _{{\text{u}}}^{{\text{c}}}$$\end{document} = 133 MPa (p-type conduction material).