Low-pressure-responsive heat-storage ceramics for automobiles.

ABSTRACT: The accumulated heat energy of a heat-storage material is typically released over time. If a heat-storage material could preserve its accumulated heat energy for a prolonged period, the applicability of such materials would be expanded greatly. Herein we report a newly fabricated heat-storage material that can store latent heat energy for a long period and release the heat energy upon demand by applying an extremely low pressure. This material is a block-type lambda trititanium pentoxide (block-type ?-Ti₃O₅). The block-type ?-phase accumulates a large heat energy of 237?kJ?L^-1 and exhibits a pressure-induced phase transition to beta trititanium pentoxide. The pressure-induced phase transition occurs by applying only several tens of bars, and half of the fraction transforms by 7?MPa (70?bar). Such a low-pressure-responsive heat-storage ceramic is effective to reuse excessive heat in automobiles or waste heat at industrial factories.

SUBMITTER: Ohkoshi SI 

PROVIDER: S-EPMC6751172 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature