Ring type furnace integrated into DAC chamber for stable and uniform sample heating up to 2000 K

The diamond anvil cell is a powerful tool for investigating material behavior under extreme pressure and temperature, but achieving efficient and uniform heating remains challenging. This study introduces a ring-type furnace integrated into a gasket with a metal–insulator–metal sandwich structure, using tantalum (Ta) for heating, tungsten (W) for electrodes, and mica-ceramic powder for insulation, enabling stable and uniform heating up to 2000 K. A calibration method combining thermocouple data and finite element simulations ensures accurate temperature measurement. Experimental validation shows that the furnace maintains optical access for spectroscopic measurements and supports in situ conductivity characterization under high-pressure and high-temperature conditions. This advancement provides a robust platform for multi-physics experiments under extreme conditions.