Open AccessМатериалы на основе твердых растворов теллуридов висмута и сурьмы, полученные методами быстрой кристаллизации расплава
Author(s) -
Л.Д. Иванова,
Ю. В. Гранаткина,
А.Г. Мальчев,
И.Ю. Нихезина,
М.В. Емельянов
Publication year - 2019
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2019.05.47558.16
Subject(s) - materials science , scanning electron microscope , crystallization , microstructure , melt spinning , thermoelectric effect , seebeck coefficient , extrusion , composite material , thermal conductivity , differential scanning calorimetry , optical microscope , thermoelectric materials , analytical chemistry (journal) , chemical engineering , spinning , chemistry , physics , chromatography , engineering , thermodynamics
p -type Bi_0.5Sb_1.5Te_3 solid solutions prepared by hot pressing and the extrusion of powders prepared by rapid melt crystallization methods such as melt spinning and melt crystallization in a liquid are investigated. The morphology of the powders, the sample cleavage surface, and their microstructure are investigated using optical microscopy, scanning electron microscopy, and scanning tunneling microscopy. The mechanical properties of the samples are investigated by room-temperature compression tests. The Seebeck coefficient, electrical conductivity, and thermal conductivity of the materials are measured in the temperature range of 100–600 K. The highest limiting compressive strength σ_B = 145 MPa at 300 K and maximal thermoelectric efficiency ( ZT )_max = 1.34 at 370 K are found for materials extruded from granules prepared by melt crystallization in water and ground in a ball mill.