Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 3, Pages 2236-2241Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b17394
Keywords
polymer-derived ceramic; thermoelectric; h-BN; SiOC; free carbon; Seebeck coefficient
Funding
- Southern Automotive Women's Scholarship Fund
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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 degrees C exhibited invariant low thermal conductivity (similar to 1.5 W/(m.K)) over 30-600 degrees C, coupled with a small increase in both Seebeck coefficient and electrical conductivity, with increase in measurement temperature (30-150 degrees C). SiOC ceramics containing 1 wt % h-BN showed the highest Seebeck coefficient (-33 mu V/K) for any PDC thus far.
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