Materials Based on Solid Solutions of Bismuth Chalcogenides of n-Type Conductivity Prepared by Melt Crystallization in a Liquid

• Published in: Semiconductors (Woodbury, N.Y.) N.Y.), 2019-05, Vol.53 (5), p.691-694
• Main Authors: Ivanova, L. D., Granatkina, Yu. V., Malchev, A. G., Nikhezina, I. Yu, Emel’yanov, M. V., Nikulin, D. S.
• Format: Article
• Language: English
• Subjects: 2018; Antimony; ANTIMONY IODIDES; Ball milling; Bismuth; BISMUTH SELENIDES; BISMUTH TELLURIDES; CADMIUM CHLORIDES; COMPRESSION STRENGTH; Compressive strength; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTALLIZATION; CUTTING; DOPED MATERIALS; Electric properties; EXTRUSION; HOT PRESSING; LIQUIDS; Magnetic Materials; Magnetism; Mechanical properties; MICROSTRUCTURE; Mortars (material); October 8–12; Physics; Physics and Astronomy; PRESSURE RANGE MEGA PA; SOLID SOLUTIONS; TEMPERATURE RANGE 0273-0400 K; THERMOELECTRIC PROPERTIES; Thermoelectricity; XVI International Conference “thermoelectrics and Their Applications–2018” (Iscta 2018,) St. Petersburg
• ISSN: 1063-7826; 1090-6479
• DOI: 10.1134/S1063782619050087

The microstructure, mechanical, and thermoelectric properties of samples of the n -type Bi 2 Te 3 –Bi 2 Se 3 solid-solution samples containing 6, 8, and 10 mol % Bi 2 Se 3 , doped with antimony iodide, cadmium chloride, and hexabromobenzene, are investigated. The samples are formed by hot pressing and the extrusion of granules prepared by melt crystallization in a liquid and ground in a mortar, cutting mill, and ball mill. Measurements are performed at room temperature and in the range of 100–600 K. The formation conditions and compositions of materials with an ultimate compressive strength of ~250 MPa and thermoelectric efficiency of ( ZT ) max = (0.9–1.0) in the temperature range of 320–430 K are found.