Controlling Metallurgical Phase Separation Reactions of the Ge0.87Pb0.13Te Alloy for High Thermoelectric Performance
Controlling Metallurgical Phase Separation Reactions of the Ge0.87Pb0.13Te Alloy for High Thermoelectric Performance
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DOI：
10.1002/aenm.201200970
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发表时间：
2013-06-01
影响因子：
27.8
通讯作者：
Kanatzidis, Mercouri
中科院分区：
文献类型：
--
作者：
Gelbstein, Yaniv;Davidow, Joseph;Kanatzidis, Mercouri
我们通过火花等离子体烧结巩固并随后控制热处理序列，证明了冶金控制反应的潜力，以增强P型GE0.87PB0.13TE组成的热电特性。观察到观察到非常高至大约2的ZT，这归因于亚微米相分离域的成核以及可比较尺寸的双胞胎和错位网络特征。基于实验测得的运输特性，结合了先前报道的相位分离的N型（PB0.95SN0.05TE）0.92（PBS）0.08组成，理论上计算了最大效率约为11.5％的最大效率值。这些ZT和效率值是单一组成非分段散装材料腿的最多报告的值。
We demonstrate the potential of metallurgical controlling of the phase separation reaction, by means of spark plasma sintering consolidation and subsequently controlled heat treatments sequence, for enhancement the thermoelectric properties of the p-type Ge0.87Pb0.13Te composition. Very high ZTs of up to approximate to 2, attributed to the nucleation of sub-micron phase separation domains and to comparable sized twinning and dislocation networks features, were observed. Based on the experimentally measured transport properties, combined with the previously reported phase separated n-type (Pb0.95Sn0.05Te)0.92(PbS)0.08 composition, a maximal efficiency value of approximate to 11.5% was theoretically calculated. These ZT and efficiency values are among the highest reported for single composition non-segmented bulk material legs.