热电效应
材料科学
纹理(宇宙学)
半导体
接口(物质)
比例(比率)
热电材料
光电子学
工程物理
纳米技术
计算机科学
复合材料
人工智能
工程类
热导率
物理
热力学
毛细管数
量子力学
毛细管作用
图像(数学)
作者
Zongmo Shi,Zhen Han,Jian Wei,Chanli Chen,Ying Zhang,Hudie Yuan,Fang Song,Junzhan Zhang,Geping He,Xueting Li
标识
DOI:10.1016/j.apsusc.2024.160046
摘要
Ca3Co4O9 is considered as an attractive material for high-temperature area application. The correlation between structure modulation and electric-thermal transport properties is an important prerequisite to optimize thermoelectric performance of Ca3Co4O9 materials. p-type Ca3Co4O9-based ceramics with texture interface were successfully prepared by tape casting method. The different content of template seeds was added into the Ca3Co4O9 semiconductor, successfully constructing the parallel interfaces. The "brick-wall" structure was formed due to the liquid film existed at grain boundaries. The sample with 15 wt% template seeds additives yielded ∼60 % rise in power factor with a peak value of 0.33 mW/(m·K2), and the low thermal conductivity of 0.97 W/(m·K) was obtained at 800 ℃. Additionally, the ZT value reached 0.34 due to the presence of multi-scale parallel interfaces among the stripe-like grains, which effectively scattered the long-wave, middle-wave and short-wave phonons and strengthened the charge carrier transporting. This texturing method offered a meaningful way for enhancing thermoelectric properties of oxides thermoelectric materials.
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