Thermoelectric behaviors of fly ash and metakaolin based geopolymer

In this paper, the thermoelectric behaviors of fly ash and metakaolin based geopolymer were investigated. It was found that the seebeck coefficient of geopolymer paste is much higher than that of cement paste, indicating geopolymer may be a promising thermoelectrical material. The influences of different parameters were discussed. The seebeck coefficient for both fly ash and metakaolin based geopolymers were found to increase with the increase of alkali concentration. The curing temperature has a more significant influence on the thermoelectric behavior of fly ash based geopolymers. Meanwhile, the increase of slag replacement ratio would result in a decreased seebeck coefficient for fly ash based geopolymer. (C) 2019 Elsevier Ltd. All rights reserved.