Temperature Determination and Thermal Structure Analysis on the Pressure Assembly of a Piston-Cylinder Apparatus

XIA Ying; DING Xing; SONG Mao-Shuang; XIONG Xiao-Lin; SHAO Tong-Bin; LI Jian-Feng; HAO Xi-Luo

doi:10.11858/gywlxb.2014.03.002

Volume 28 Issue 3

Jun 2015

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Chinese Journal of High Pressure Physics > 2014 > 28(3): 262-272.

XIA Ying, DING Xing, SONG Mao-Shuang, XIONG Xiao-Lin, SHAO Tong-Bin, LI Jian-Feng, HAO Xi-Luo. Temperature Determination and Thermal Structure Analysis on the Pressure Assembly of a Piston-Cylinder Apparatus[J]. Chinese Journal of High Pressure Physics, 2014, 28(3): 262-272. doi: 10.11858/gywlxb.2014.03.002

Citation:

XIA Ying, DING Xing, SONG Mao-Shuang, XIONG Xiao-Lin, SHAO Tong-Bin, LI Jian-Feng, HAO Xi-Luo. Temperature Determination and Thermal Structure Analysis on the Pressure Assembly of a Piston-Cylinder Apparatus[J]. Chinese Journal of High Pressure Physics, 2014, 28(3): 262-272. doi: 10.11858/gywlxb.2014.03.002

Citation:

XIA Ying, DING Xing, SONG Mao-Shuang, XIONG Xiao-Lin, SHAO Tong-Bin, LI Jian-Feng, HAO Xi-Luo. Temperature Determination and Thermal Structure Analysis on the Pressure Assembly of a Piston-Cylinder Apparatus[J]. Chinese Journal of High Pressure Physics, 2014, 28(3): 262-272. doi: 10.11858/gywlxb.2014.03.002

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Temperature Determination and Thermal Structure Analysis on the Pressure Assembly of a Piston-Cylinder Apparatus

doi: 10.11858/gywlxb.2014.03.002

1.
State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640
2.
Graduate University of Chinese Academy of Sciences, Beijing 100049, China
3.
Department of Earth Science, Hongkong University, Hongkong, China

Received Date: 05 Nov 2012
Rev Recd Date: 07 Jan 2013

Abstract

Abstract

Piston-cylinder apparatus is widely used for high-pressure and high-temperature experiments.Its thermal structure in the pressure chamber depends mainly on design and materials of the sample assembly.Here we present a thermal structure analysis on the 13 mm pressure assembly of a QUICKpress piston-cylinder apparatus on the basis of the experimental temperature measurements using the double thermocouple determination, the spinel reaction progress thermometer, and heat conduction simulation by Fourier's law.The temperature measurements were conducted at 0.5 GPa, 1.0 GPa and 1.5 GPa with the control thermocouple in a temperature range of 800-1 400 ℃.The major results are summarized as follows:(1) the hot spot is always located at a position below the midpoint of effective furnace (this means that it is close to the steel base plug); (2) the hot spot region with a temperature variation within 20 ℃ possesses a width of 2.8 mm to 5.2 mm, showing a low thermal gradient of 7.7-13.0 ℃/mm while the region far from hot spot shows a much higher thermal gradient of 42-83 ℃/mm; (3) the position of hot spot moves toward the center or midpoint of effective furnace with pressure or temperature increasing, but the temperature profile is main determined by the temperature of hot spot, with the hot spot region becoming narrower and the thermal gradients for both the hot spot region and the region far from hot spot becoming larger with temperature increasing.On the basis of our experimental and numerical simulation results, effective factors controlling the thermal structure of pressure assembly of a piston-cylinder apparatus and other issues are further discussed.
- piston-cylinder,
- spinel reaction progress thermometer,
- double-thermocouple determination,
- thermal gradient,
- thermal structure

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References(31)

References

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