Efficient graphite ring heater suitable for diamond-anvil cells to 1300 K

Area of Science:

• High-pressure physics
• Materials science
• Experimental techniques

Background:

• Diamond-anvil cells (DACs) are crucial for studying materials under extreme conditions.
• Achieving homogeneous high temperatures in DACs, especially up to 1300 K, presents significant engineering challenges.
• Existing heating methods may require specialized DAC materials or limit in situ analytical capabilities.

Purpose of the Study:

• To develop a novel resistive heating system for diamond-anvil cells (DACs).
• To achieve homogeneous high temperatures (up to 1300 K) at high pressures.
• To enable versatile in situ measurements, including radial X-ray diffraction (XRD).

Main Methods:

• A ring-shaped graphite heater was designed and implemented.
• The heater was placed in direct contact with the diamond anvils within the DAC.
• The system was tested for its heating efficiency and compatibility with various in situ probes.

Main Results:

• The graphite heater successfully heated DAC samples to 1300 K.
• The DAC body temperature was maintained below 800 K, avoiding the need for special alloys.
• The compact design facilitated in situ X-ray, optical, and electrical measurements.
• Side access enabled radial X-ray diffraction (XRD) measurements.

Conclusions:

• The developed ring-shaped graphite heater is an effective solution for high-temperature, high-pressure research using DACs.
• This system offers efficient heating, a compact design, and broad analytical flexibility.
• The capability for radial XRD measurements significantly enhances the study of materials under extreme conditions.