We have porous ceramic platelets of ~50x5x1 mm³ thickness infiltrated with ammonium nitrate solution (NH4NO3). We want to decompose and evaporate it w/o damaging the fragile substrate (decomposition should take place at ~210 °C)
Since this is part of a repeated experimental procedure, it shouldn't take longer than ~15 minutes for heating, decomposition and cooling back to max ~50 °C for a batch of 10 to 20 samples at once.
I was thinking about a microwave furnace since it would heat only the samples, or maybe even only the ammonium nitrate within the samples (not sure how well ceramics (ZrO2) couples in the µwave), but since it will heat the material uniformly, I'm concerned about explosive evaporation and damage of the fragile samples. Might still be suitable if the power is tuned well.
What also came to my mind was inductive heating of a small metal sample carrier or sample holding capsule. Could also be quick. However I have no idea if lab devices like this are available, at least I've found nothing.
Any other ideas?