A simple external resistance heating diamond anvil cell and its application for synchrotron radiation x-ray...

Area of Science:

• High-pressure physics and materials science.
• Geophysics and planetary science.

Background:

• Diamond anvil cells (DACs) are crucial for simulating extreme conditions.
• Accurate temperature and pressure measurements are vital for high-pressure research.

Purpose of the Study:

• To construct a simple external heating system for DAC experiments.
• To enable high-pressure, high-temperature X-ray diffraction studies.
• To validate the system's performance with material studies.

Main Methods:

• Designed and built a novel external heating assemblage for DACs.
• Utilized a NiCr resistance wire for heating and thermocouples for temperature measurement.
• Integrated the DAC system with synchrotron radiation for X-ray diffraction.

Main Results:

• Successfully constructed a DAC system capable of reaching 34 GPa and 653 K.
• Demonstrated the system's utility through a phase transition study of cinnabar (alpha-HgS).
• Showcased the system's application in determining the thermal equation of state for almandine.

Conclusions:

• The developed external heating system is effective for high-pressure, high-temperature research.
• The system facilitates convenient synchrotron X-ray diffraction analysis.
• This apparatus is suitable for studying material properties under extreme conditions.