Experimental Determination of Phase Equilibria in the Sn-Zn-Sb System

Abstract

The phase equilibria of the Sn-Zn-Sb ternary system at 400 and 500°C were experimentally determined by electron probe microanalyzer, x-ray diffraction and differential scanning calorimetry. In this study, the ternary compound of (Zn,Sn)Sb is confirmed at 400 and 500°C. Additionally, a liquid phase region is found at 400°C with composition ranges of 9. at.% Sn, which becomes a prolongation of the main liquid as the temperature is raised to 500°C.

Phonon properties of ZnSnSb2 + Mn semiconductors: Raman spectroscopy

“…The results of phase identification show that white microstructures correspond to SnSb and Sb phases, the gray phases to formed ternary ZnSnSb 2 , and dark gray and black microstructures to MnSb and ZnSb. This is consistent with results from literature …”

“…It has been established that SnSb phase exists in these samples; thus, it is a reasonable assumption that these modes originate from it. SnSb phase forms the white fields, which is registered previously, and microstructures with some small dark inclusions, as it could be seen in Figure . ‐Low‐intensity spectra are analyzed next. Complex spectrum from b2 has clear peaks that can be identified as follows: 185.8 and 197.7 cm −1 —from ZnSnSb 2 ; 81 and 172 cm −1 —from ZnSb; and 114 and 150 cm −1 and weak at 270 cm −1 —from Sb, according to data from Table . ‐Spectra d3 and d4 are similar.…”

Phase Boundary Mapping of Tin‐Doped ZnSb Reveals Thermodynamic Route to High Thermoelectric Efficiency

“…Four three‐phase regions have been identified around ZnSb at 400 °C by Wang et al. [ 14 ] ( Figure 2 ). Each of the four phase spaces are identified by both XRD and electron microscopy.…”

“…al. [ 14 ] Lavender areas represent single‐phase regions, white regions are two‐phase regions, and yellow regions are three‐phase regions. b) The phase diagram zoomed into the ZnSb composition shows four distinct three‐phase regions accessible by doping ZnSb with Sn.…”

“…Synthesis: The nominal compositions of samples studied in each of the four 3-phase regions and analyzed for this paper are shown in Table 2. Synthesis techniques used by Wang et al [14] were used to target the phase spaces in the phase diagrams seen in Figure 2. The starting materials were Zn (99.999%), Sb (99.9999%), and Sn (99.999%) bulk pieces all procured from Alpha Aesar.…”