In situ thermal conductivity measurement in diamond anvil cell

Yue, Donghui; Zhao, Lin; Yan, Yu; Ji, Tingting; Han, Yonghao

doi:10.7567/1347-4065/ab01f1

Cited by 9 publications

(7 citation statements)

References 32 publications

(26 reference statements)

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“…The simulation results using the surface radiation model yield almost the same thermal conductivity as that from Yue et al's results by heat conduction model. 34) Hence, it is clear that the heat loss caused by surface radiation is minimal and shows limited effects on diamonds' thermal conductivity at temperatures between 320 and 570 K. This is consistent with the radiant heat loss ratio obtained in the previous part. However, the result from the NTRC heat transfer model is more conformable with Olson et al's data as the diamond anvils temperature increases.…”

Section: Validation Of the Radiation-conduction Coupling Heat Transfe...supporting

confidence: 89%

“…As demonstrated in Fig. 4, the thermal conductivity of diamond obtained from both models is comparable to that obtained from Yue et al's 34) results and the Olson et al's 36) results using the flash diffusivity method, yet shows minimal deviation from each other. The simulation results using the surface radiation model yield almost the same thermal conductivity as that from Yue et al's results by heat conduction model.…”

Section: Validation Of the Radiation-conduction Coupling Heat Transfe...supporting

confidence: 80%

“…In order to verify the rationality of the proposed model, we compared our simulated thermal conductivity of type Ia diamond with that obtained through the experiment. Based on the temperature measurements via thermocouples, 34) the simulation of thermal conductivity of type Ia diamond was performed using NSRC and NTRC heat transfer models. In this scheme, T 1 (T 2 ) is the top (bottom) anvil's back surface temperature and T 3 (T 4 ) is the temperature at the midpoint D 3 (D 4 ) of the top (bottom) anvil lateral edges.…”

Section: Validation Of the Radiation-conduction Coupling Heat Transfe...mentioning

confidence: 99%

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Effect of radiation-induced heat transfer on the temperature measurements in externally heated diamond anvil cells

Jia¹,

Ji²,

Jiang³

et al. 2021

Jpn. J. Appl. Phys.

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The study of the thermal transport property of matter under extreme conditions is a significant but challenging task in the science community due to the unsatisfactory accuracy of heat flow characterization experimentally. In this work, a radiative-conductive coupled heat transfer model was proposed to resolve the heat transfer process inside a diamond anvil cell (DAC) under static heating conditions. The rationality of the model was verified via the characterization of the thermal conductivity of type Ia diamond. It is found that obvious error can come from the measurement of temperature by thermocouples in DAC. Based on this model, a temperature correction method with certain universality is presented for accurate temperature measurement by thermocouples in high-temperature experiments. The construction of the proposed model combined with the new correction method for temperature measurements may provide an efficient method for measuring potential thermal conductivity in a Bassett-type externally heated DAC.

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Section: Validation Of the Radiation-conduction Coupling Heat Transfe...supporting

confidence: 89%

Section: Validation Of the Radiation-conduction Coupling Heat Transfe...supporting

confidence: 80%

Section: Validation Of the Radiation-conduction Coupling Heat Transfe...mentioning

confidence: 99%

See 1 more Smart Citation

Effect of radiation-induced heat transfer on the temperature measurements in externally heated diamond anvil cells

Jia¹,

Ji²,

Jiang³

et al. 2021

Jpn. J. Appl. Phys.

Self Cite

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show abstract

“…[17] Then this method was verified via the characterization of the thermal conductivity of diamond. [28] It was found that, as the diamond temperature increases, the influence of the radiation on the temperature field of the DAC increases. Since the radiationconduction heat transfer model is applied to analyze the heat fluxes, it is necessary to know the radiant characteristics of a Iatype diamond anvil.…”

Section: Methodsmentioning

confidence: 99%

Investigating the thermal conductivity of materials by analyzing the temperature distribution in diamond anvils cell under high pressure

Jia¹,

Cao²,

Ji³

et al. 2022

Chinese Phys. B

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Investigating the thermal transport properties of materials is of great importance in the field of earth science and for the development of materials under extremely high temperatures and pressures. However, it is an enormous challenge to characterize the thermal and physical properties of materials using the diamond anvil cell (DAC) platform. In the present study, a steady-state method is used with a DAC and a combination of thermocouple temperature measurement and numerical analysis is performed to calculate the thermal conductivity of the material. To this end, temperature distributions in the DAC under high pressure are analyzed. We propose a three-dimensional radiative–conductive coupled heat transfer model to simulate the temperature field in the main components of the DAC and calculate in situ thermal conductivity under high-temperature and high-pressure conditions. The proposed model is based on the finite volume method. The obtained results show that heat radiation has a great impact on the temperature field of the DAC, so that ignoring the radiation effect leads to large errors in calculating the heat transport properties of materials. Furthermore, the feasibility of studying the thermal conductivity of different materials is discussed through a numerical model combined with locally measured temperature in the DAC. This article is expected to become a reference for accurate measurement of in situ thermal conductivity in DACs at high-temperature and high-pressure conditions.

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“…Thermal conductivity (W/(m•K)) function [19] function [24] function [26] Specific heat capacity (J/(kg•K)) function [20] function [23] 460…”

Section: Mathematical Modelmentioning

confidence: 99%

Effect of deformation of diamond anvil and sample in diamond anvil cell on the thermal conductivity measurement*

Jia¹,

Jiang²,

Cao³

et al. 2021

Chinese Phys. B

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Studies show that the sample thickness is an important parameter in investigating the thermal transport properties of materials under high-temperature and high-pressure (HTHP) in the diamond anvil cell (DAC) device. However, it is an enormous challenge to measure the sample thickness accurately in the DAC under severe working conditions. In conventional methods, the influence of diamond anvil deformation on the measuring accuracy is ignored. For a high-temperature anvil, the mechanical state of the diamond anvil becomes complex and is different from that under the static condition. At high temperature, the deformation of anvil and sample would be aggravated. In the present study, the finite volume method is applied to simulate the heat transfer mechanism of stable heating DAC through coupling three radiative-conductive heat transfer mechanisms in a high-pressure environment. When the temperature field of the main components is known in DAC, the thermal stress field can be analyzed numerically by the finite element method. The obtained results show that the deformation of anvil will lead to the obvious radial gradient distribution of the sample thickness. If the top and bottom surfaces of the sample are approximated to be flat, it will be fatal to the study of the heat transport properties of the material. Therefore, we study the temperature distribution and thermal conductivity of the sample in the DAC by thermal-solid coupling method under high pressure and stable heating condition.

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In situ thermal conductivity measurement in diamond anvil cell

Cited by 9 publications

References 32 publications

Effect of radiation-induced heat transfer on the temperature measurements in externally heated diamond anvil cells

Effect of radiation-induced heat transfer on the temperature measurements in externally heated diamond anvil cells

Investigating the thermal conductivity of materials by analyzing the temperature distribution in diamond anvils cell under high pressure

Effect of deformation of diamond anvil and sample in diamond anvil cell on the thermal conductivity measurement*

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