A tungsten external heater for BX90 diamond anvil cells with a range up to 1700 K

Resistive heating of a sample in a diamond anvil cell (DAC) can generate a homogeneous temperature field across the sample chamber with reliable temperatures measured by a thermocouple. It is of importance in experiments aiming at exploring phase diagrams and quantifying thermoelastic properties of...

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Bibliographic Details
Published in:Review of scientific instruments 2021-01, Vol.92 (1), p.013903-013903
Main Authors: Yan, J., Doran, A., MacDowell, A. A., Kalkan, B.
Format: Article
Language:English
Subjects:
Aluminum oxide
Anvils
Coils
Diamond anvil cells
Material properties
Melting points
Modular design
Oxidation
Phase diagrams
Scientific apparatus & instruments
Temperature
Temperature distribution
Thermal expansion
Thermocouples
Thermoelastic properties
Tungsten
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Summary:Resistive heating of a sample in a diamond anvil cell (DAC) can generate a homogeneous temperature field across the sample chamber with reliable temperatures measured by a thermocouple. It is of importance in experiments aiming at exploring phase diagrams and quantifying thermoelastic properties of materials. Here, we present a ring-heater design developed for BX90 diamond anvil cells (DACs). It is made of a ring-shaped aluminum oxide holder hosting a tungsten wire coil inside and coupled with Ar + 2% H2 gas to prevent oxidation during experiment. This modular plug-and-play design enables in situ studies of samples via x-ray diffraction up to a temperature of 1700 K. Temperature in the BX90 sample volume as measured through a thermocouple was calibrated using the melting point of gold. As an application of this design, we report the thermal expansion coefficient of MgO at 9.5(1) GPa.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0009663