Eco-friendly Bi substituted ZnSb samples were prepared by a novel hydrogen decrepitation method, followed by consolidation using the cold pressing technique. The structural and morphological analysis of the samples have been carried out by XRD, FESEM and TEM. XRD analysis confirms the phase purity of the ZnSb sample. The presence of secondary phase of Bi was observed in the XRD patterns of Bi substituted Zn_1-xBi_xSb (0.02 ≤ x ≤ 0.06) samples, probably due to low solid solubility limit of Bi in ZnSb alloy. FESEM and HRTEM images revealed the highly inter-connected grain structure and the grain sizes were in the range of 200 nm. The electrical resistivity and Seebeck coefficient values of Zn_1-xBi_xSb samples were decreased compared to the pristine ZnSb sample. The power factor of Zn_0.98Bi_0.02Sb sample increased compared to pure sample. The thermal conductivity of Zn_1-xBi_xSb alloys were increased with increasing Bi content (x). As a result, a high ZT of ~0.45 was achieved for Zn_0.98Bi_0.02Sb sample at 573 K compared to pure ZnSb (0.39). The experimental results demonstrated that bismuth substitution with optimum content is a promising approach to enhance the thermoelectric properties of ZnSb.

通过一种新型的氢爆裂方法制备了环保的 Bi 取代 ZnSb 样品，然后使用冷压技术进行固结。样品的结构和形态分析已通过 XRD、FESEM 和 TEM 进行。XRD 分析证实了 ZnSb 样品的相纯度。在 Bi 取代的 Zn _1-x Bi _x Sb (0.02 ≤ x ≤ 0.06) 样品的 XRD 图中观察到 Bi 的第二相的存在，这可能是由于 Bi 在 ZnSb 合金中的低固溶度极限。FESEM 和 HRTEM 图像揭示了高度互连的晶粒结构，晶粒尺寸在 200 nm 范围内。Zn _1-x Bi _{x 的}电阻率和塞贝克系数值与原始 ZnSb 样品相比，Sb 样品有所减少。Zn _0.98 Bi _0.02 Sb 样品的功率因数比纯样品有所提高。Zn _1-x Bi _x Sb 合金的热导率随着 Bi 含量 (x) 的增加而增加。结果，与纯 ZnSb (0.39) 相比，Zn _0.98 Bi _0.02 Sb 样品在 573 K下实现了 ~0.45 的高 ZT 。实验结果表明，具有最佳含量的铋取代是提高 ZnSb 热电性能的一种有前景的方法。