聚合物衍生硅氧碳陶瓷作为下一代有前途的可持续热电材料。

Polymer-Derived Silicon Oxycarbide Ceramics as Promising Next-Generation Sustainable Thermoelectrics.

机构信息

Department of Automotive Engineering, ‡Clemson Composites Center, §Department of Physics & Astronomy, and ⊥Department of Materials Science and Engineering, Clemson University , Greenville, South Carolina 29601, United States.

出版信息

ACS Appl Mater Interfaces. 2018 Jan 24;10(3):2236-2241. doi: 10.1021/acsami.7b17394. Epub 2018 Jan 12.

DOI:10.1021/acsami.7b17394

PMID:29309124

Abstract

We demonstrate the potential of polymer-derived ceramics (PDC) as next-generation sustainable thermoelectrics. Thermoelectric behavior of polymer-derived silicon oxycarbide (SiOC) ceramics (containing hexagonal boron nitride (h-BN) as filler) was studied as a function of measurement temperature. SiOC, sintered at 1300 °C exhibited invariant low thermal conductivity (∼1.5 W/(m·K)) over 30-600 °C, coupled with a small increase in both Seebeck coefficient and electrical conductivity, with increase in measurement temperature (30-150 °C). SiOC ceramics containing 1 wt % h-BN showed the highest Seebeck coefficient (-33 μV/K) for any PDC thus far.

摘要

我们展示了聚合物衍生陶瓷（PDC）作为下一代可持续热电材料的潜力。研究了聚合物衍生硅氧碳（SiOC）陶瓷（含六方氮化硼（h-BN）作为填充剂）的热电行为，作为测量温度的函数。在 1300°C 下烧结的 SiOC 在 30-600°C 范围内表现出不变的低热导率（约 1.5 W/（m·K）），同时塞贝克系数和电导率随着测量温度（30-150°C）的升高而略有增加。含 1wt%h-BN 的 SiOC 陶瓷表现出迄今为止任何 PDC 中最高的塞贝克系数（-33μV/K）。