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ISSN Druckformat: 2150-766X
ISSN Online: 2150-7678
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THERMOELECTRIC PULSE POWER GENERATION USING SELF-SUSTAINING GASLESS NANOREACTANT SYSTEMS
ABSTRAKT
Thermoelectric (TE) modules that convert heat into electricity and vice versa (Seebeck−Peltier effect) have great potential in the field of short-term power generation. Commercially available TE modules are manufactured with a series of p- and n-doped semiconductor materials sandwiched between two ceramic face sheets. A commonly used ceramic material in these devices is Al2O3, which has a relatively low thermal conductivity (28 W/m·K). If it is replaced with a material with higher thermal conductivity, such as AlN (180 W/m·K), significantly faster electrical pulses may be generated. In this paper, pulse voltage generation was investigated using a self-sustaining nanothermite reactive system containing Fe2O3/Al coated on Al2O3 or AlN face plates of a TE module. Al2O3 substrates of two TE modules were coated directly with Fe2O3/Al and were placed on top of each other with Ni−Al foil sandwiched in between the two coated surfaces. Upon ignition of this hybrid reactive system, a pulse of 6 V with the rise time of about 200 ms was generated. Experiments have shown that the replacement of Al2O3 with AlN reduces the rise time. The effect of a gasless reacting system−such as reactive powder, foil, and combinations thereof−on dynamic voltage generation in TE modules is presented.
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Ervin Matthew H., Bedair Sarah S., Knick Cory R., Tsang Harvey, Isaacson Brian, Piekiel Nicholas W., Evaporation Driven Assembly of On-Chip Thermite Devices, Journal of Microelectromechanical Systems, 26, 6, 2017. Crossref