Investigations on the thermal stability, long-term reliability of LiNO3/KCl – expanded graphite composite as industrial waste heat storage material and its corrosion properties with metals

2017 ◽  
Vol 188 ◽  
pp. 521-528 ◽  
Author(s):  
Zhaowen Huang ◽  
Zigeng Luo ◽  
Xuenong Gao ◽  
Xiaoming Fang ◽  
Yutang Fang ◽  
...  
Keyword(s):  
Industrial Waste ◽  
Heat Storage ◽  
Waste Heat ◽  
Expanded Graphite ◽  
Storage Material ◽  
Corrosion Properties ◽  
Graphite Composite ◽  
Heat Storage Material ◽  
Industrial Waste Heat

scholarly journals Low-pressure-responsive heat-storage ceramics for automobiles

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Shin-ichi Ohkoshi ◽  
Hiroko Tokoro ◽  
Kosuke Nakagawa ◽  
Marie Yoshikiyo ◽  
Fangda Jia ◽  
...  
Keyword(s):  
Phase Transition ◽  
Heat Storage ◽  
Waste Heat ◽  
Low Pressure ◽  
Heat Energy ◽  
Block Type ◽  
Storage Material ◽  
Excessive Heat ◽  
Heat Storage Material ◽  
Large Heat

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 λ-Ti3O5). The block-type λ-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.

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