Thermoelectric properties of carbon nanotube reinforced cement-based composites fabricated by compression shear
Thermoelectric properties of carbon nanotube reinforced cement-based composites fabricated by compression shear
复制标题
压缩剪切法制备碳纳米管增强水泥基复合材料的热电性能
DOI：
10.1016/j.ceramint.2018.01.074
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Qian Zhang
中科院分区：
文献类型：
--
作者：
Jian Wei（魏剑）;Yin Fan;Lili Zhao;Fei Xue;Lei Hao;Qian Zhang
将质量分数分别为5.0%、10.0%和15.0%的碳纳米管（CNTs）掺入水泥基体中，采用混合法和干压剪切法制备了CNTs增强水泥基复合材料（CNTs/CC）。对所得CNTs/CC复合材料的塞贝克系数、电导率和热导率进行了详细的测量和分析。CNTs/CC具有p型半导体的热电性能。在压剪应力作用下，碳纳米管在水泥基体中均匀分散，提高了复合材料的电导率（0.818 S/cm）和塞贝克系数（57.98 μV/°C）。结合其较低的热导率（0.734 ~ 0.947 W m-1 K-1），CNTs/CC的热电优值（ZT）最高可达9.33 × 10 - 5，有利于在未来城市建筑物和路面中以低成本进行大规模能量收集。
Carbon nanotubes (CNTs) with weight percent of 5.0%, 10.0% and 15.0% were added into the cement matrix to fabricate CNT reinforced cement-based composites (CNTs/CC) by mixing and dry compression shear methods. Seebeck coefficient, electrical conductivity and thermal conductivity of the as-received CNTs/CC were measured and analyzed in detail. The CNTs/CC exhibits the thermoelectric behavior of p-type semiconductor. CNTs were dispersed uniformly in cement matrix by compression shear stress, which promoted a relatively high electrical conductivity (0.818 S/cm) and Seebeck coefficient (57.98 μV/°C) of CNTs/CC. Combining with their lower thermal conductivity ranged from 0.734 to 0.947 W m−1K−1, the CNTs/CC shows the highest thermoelectric figure of merit (ZT) has reached 9.33 × 10−5, Which is benefit to the applications in large-scale energy harvesting in the buildings and pavements with low cost in the future cities.
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