中国物理B ›› 2020, Vol. 29 ›› Issue (9): 90703-090703.doi: 10.1088/1674-1056/ab9dec

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A double-layer heating method to generate high temperature in a two-stage multi-anvil apparatus

Bo Peng(彭博), Zili Kou(寇自力), Mengxi Zhao(赵梦溪), Mingli Jiang(姜明莉), Jiawei Zhang(张佳威), Yipeng Wang(王义鹏), Lu Zhang(张陆)   

  1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
  • 收稿日期:2020-04-21 修回日期:2020-06-10 接受日期:2020-06-18 出版日期:2020-09-05 发布日期:2020-09-05
  • 通讯作者: Zili Kou E-mail:kouzili@scu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51872189) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2018SCUH0022).

A double-layer heating method to generate high temperature in a two-stage multi-anvil apparatus

Bo Peng(彭博), Zili Kou(寇自力), Mengxi Zhao(赵梦溪), Mingli Jiang(姜明莉), Jiawei Zhang(张佳威), Yipeng Wang(王义鹏), Lu Zhang(张陆)   

  1. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
  • Received:2020-04-21 Revised:2020-06-10 Accepted:2020-06-18 Online:2020-09-05 Published:2020-09-05
  • Contact: Zili Kou E-mail:kouzili@scu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51872189) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2018SCUH0022).

摘要: A new heating method is proposed to increase the cell temperature of the 6-8 type multi-anvil apparatus without reducing the volume of the sample chamber. The double-layer heater assembly (DHA) has two layers of heaters connected in parallel. The temperature of the cell was able to reach 2500 ℃ by using 0.025 mm rhenium foils, and the temperature limit was increased by 25% compared with that of the traditional single-layer assembly. The power-temperature relationships for these two assemblies with different sizes were calibrated by using W/Re thermocouple at 20 GPa. When the volume of samples was the same, the DHA not only attained higher temperature, but also kept the holding time longer, compared to the traditional assembly. The results of more than ten experiments showed that the new 10/4 DHA with a relatively large sample size (2 mm in diameter and 4 mm in height) can work stably with the center temperature of the sample cavity exceeding 2300 ℃ under the pressure of 20 GPa.

关键词: double-layer heater, high pressure and high temperature, multi-anvil apparatus

Abstract: A new heating method is proposed to increase the cell temperature of the 6-8 type multi-anvil apparatus without reducing the volume of the sample chamber. The double-layer heater assembly (DHA) has two layers of heaters connected in parallel. The temperature of the cell was able to reach 2500 ℃ by using 0.025 mm rhenium foils, and the temperature limit was increased by 25% compared with that of the traditional single-layer assembly. The power-temperature relationships for these two assemblies with different sizes were calibrated by using W/Re thermocouple at 20 GPa. When the volume of samples was the same, the DHA not only attained higher temperature, but also kept the holding time longer, compared to the traditional assembly. The results of more than ten experiments showed that the new 10/4 DHA with a relatively large sample size (2 mm in diameter and 4 mm in height) can work stably with the center temperature of the sample cavity exceeding 2300 ℃ under the pressure of 20 GPa.

Key words: double-layer heater, high pressure and high temperature, multi-anvil apparatus

中图分类号:  (High-pressure apparatus; shock tubes; diamond anvil cells)

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