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grain side 皮革粒面。

grain sorghum

The samples with smaller grain sides were obtained in our experiment , and the properties are corresponding with that of those samples prepared by melting method mentioned previously . several approaches can be proposed for further increasing the thermoelectric properties . preparation of the material with different compositional deviations availably controlled from stoichiometry is one of the ways to change the carrier concentration , and hence to optimize the value of power factor 該方法獲取的塊體樣品的片狀顆粒的粒度遠小于熔煉法制備的樣品,樣品的性能也與熔煉法相當,如果能有效控制樣品的化學計量比,提高生成物的純度將會更大程度的提高材料的熱電性能。