Development of Thermoelectric Materials using Weakly Bonded Rigid Heavy Clusters

在AlPdRe和AlPdMn准晶中，我们根据我们新提出的弱键合刚性重团簇的指导思想，对其微观结构进行了改进，并替代了组成元素。用Fe替代Re，使准晶的无因次优值ZT提高2.6倍至0.21；用Al替代Ga，使准晶的无量纲优值ZT提高1.4倍，达到最大值0.26。另一方面，对于被认为是铝基准晶相关材料的Al_2Ru，通过用较重的Ga替代Al和降低导热系数，成功地将ZT提高到0.5。

In AlPdRe and AlPdMn quasicrystals, we improved the microstructure and substituted the constitution elements according to our new guiding principle of WBRHC (weakly bonded rigid heavy clusters). We succeeded that the dimensionless figure of merit, ZT, increases 2.6 times to 0,21 by the substitution of Fe for Re in the former and 1.4 times to the largest value of 0.26 for the quaqsicrystals by the substitution of Ga for Al in the latter. On the other hand, in Al_2Ru which has been considered to be a related material for the Al-based quasicrystals, we succeeded to improve ZT to be 0.5 by substituting heavier Ga for Al and decreasing the thermal conductivity.