The influence of grain size ( d ) on the thermal conductivity ( k ) of thermoelectric ( TE ) materials has been well established through experimental studies. However, the effect of grain size distribution, described by S n , on k has not been reported before. Since thermal conductivity is a key contributor to the figure of merit ( ZT ) for thermoelectric materials, studying the effect of grain size distribution, an important microstructural descriptor, on k is necessary. In the current study we are evaluating the effect of S n on the k of thermoelectric materials by using data reported in literature on bismuth telluride (Bi 2 Te 3 ) and lead telluride (PbTe). We first check for correlations between k and d . In literature, mathematical correlations between lattice thermal conductivity ( k l ) and d have already been reporte...

中文翻译：

---

评估粒度分布对热电材料导热系数的影响

通过实验研究已经很好地确定了晶粒尺寸（d）对热电（TE）材料的导热率（k）的影响。但是，Sn所描述的晶粒尺寸分布对k的影响尚未见报道。由于热导率是热电材料品质因数（ZT）的关键因素，因此研究晶粒尺寸分布（一种重要的微观结构描述符）对k的影响是必要的。在当前的研究中，我们正在使用文献报道的碲化铋（Bi 2 Te 3）和碲化铅（PbTe）的数据评估S n对热电材料k的影响。我们首先检查k和d之间的相关性。在文献中，已经报道了晶格热导率（kl）与d之间的数学关系。