Internal Resistive Heating (IRH)

A technique for internally heating non-metallic samples to 3000 K and >60 GPa in the diamond anvil cell.

Internal resistive heating (IRH) is a technique developed in our lab for heating non-metallic samples in the diamond anvil cell to extreme temperatures (up to 3000 K) and pressures (>60 GPa). Unlike laser heating, IRH provides stable, uniform heating over long durations, making it ideal for experiments that require extended equilibration times or in situ measurements at simultaneous high pressure and temperature.

The method uses a metallic heater element embedded within the sample assembly inside the diamond anvil cell. By passing a current through the heater, the sample is heated internally and uniformly, avoiding the steep thermal gradients associated with laser-heating techniques.

Reference: B. J. Heinen, J. W. E. Drewitt, M. J. Walter, C. Clapham, F. Qin, A. K. Kleppe & O. T. Lord (2021). Internal resistive heating of non-metallic samples to 3000 K and >60 GPa in the diamond anvil cell. Review of Scientific Instruments, 92(6), 063904. DOI: 10.1063/5.0038917