Flash-within-flash (FWF) Joule heating is a two-vessel configuration of Flash Joule Heating (FJH) in which an outer vessel is flashed and drives conversion of an inner feedstock by indirect heating. It is the dossier's principal answer to the problem that poorly conducting materials cannot be flashed directly.
Role in the dossier
The source compilation lists FWF among the hardware and method variants of flash Joule heating and identifies WO2025042774 as a patent filing covering it. A related approach described in the review excerpt, two-step FJH, first carbonizes the feedstock at low current (about 10 s) to raise conductivity, then applies the high-current flash; this reportedly reduces the conductive-additive requirement from 10–20 wt% to 2–3 wt% carbon black, with the additives themselves co-converting to graphene. The dossier does not present two-step FJH as a form of FWF.
The dossier provides no performance data specific to FWF beyond its description as a configuration for non-conductive feedstocks.
Related pages
Flash Joule Heating (FJH) · Joule Heating
Source notes & attribution
- https://rexresearch.com/FlashJouleHeating/FlashJouleHeating.html