Improved thermoelectric properties in solid state microwave of Zn1-xYbxSb compound by Yb for Zn substitution

Results in Materials Pub Date : 2024-06-21 DOI:10.1016/j.rinma.2024.100597

Arej Kadhim

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Abstract

In this research, the Zn-Yb-Sb materials in the form Zn_1-xYb_xSb; x = 0.02 to 0.8, were composed by a solid-state microwave method. These samples were examined to determine the crystal structure by XRD analysis, which indexed to the orthorhombic phase. The dominant peak (112) had a clearly shift in Bragg angle from 28.536° to 28.784° with increasing Yb content. The Yb content (x) effects on the thermoelectric properties (TE) was measured at the temperature reach to 500 K. Increased the Yb content (the sample with x = 0.8) in Zn_1-xYb_xSb caused an increase in the Seebeck coefficient (486 μV/K at 433 K) and a decrease in each of the hole concentration (3.02 × 10²¹ cm⁻³) and the electrical conductivity (5320 S/m). Ascribing to the increased Seebeck coefficient, the higher value of the power factor measured in this research was 1257 μW/mK² at 473K for the sample of Zn_0.92Yb_0.08Sb (x = 0.08).). These experimental results suggest that a clear idea of the application of the Zn_1-xYb_xSb for TE modules.

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以镱代锌改善 Zn1-xYbxSb 化合物在固态微波中的热电性能

本研究采用固态微波法合成了 Zn-Yb-Sb 材料，其形式为 Zn1-xYbxSb；x = 0.02 至 0.8。通过 X 射线衍射分析确定了这些样品的晶体结构，结果显示其为正交相。随着镱含量的增加，主峰（112）的布拉格角明显从 28.536°移至 28.784°。Zn1-xYbxSb 中镱含量的增加（x = 0.8 的样品）导致塞贝克系数增加（433 K 时为 486 μV/K），空穴浓度（3.02 × 1021 cm-3）和电导率（5320 S/m）分别下降。由于塞贝克系数的增加，在 473K 时，Zn0.92Yb0.08Sb（x = 0.08）样品测得的功率因数的较高值为 1257 μW/mK2。）这些实验结果表明，Zn1-xYbxSb 可用于 TE 模块。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Results in Materials

CiteScore

5.30

自引率

0.00%

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