Heating Technique, Temperature Measurement, and Temperature Distribution in High Pressure Experiments on Large Volume Press(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2018年第04期
- Page:
- 428-448
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Heating Technique, Temperature Measurement, and Temperature Distribution in High Pressure Experiments on Large Volume Press
- Author(s):
- CHEN Tao; WANG Yi-chuan; BAO Xin-jian; MA Yun-lu; LIU Li-ping; LIU Xi
- 1. School of Earth and Space Sciences, Peking University, Beijing 100871, China; 2. Key Laboratory of Orogenic Belts and Crustal Evolution of Ministry of Education, Peking University, Beijing 100871, China
- Keywords:
- high-P and high-T experiment; heater; temperature measurement; thermocouple; large volume press; cubic press; temperature distribution; temperature gradient
- PACS:
- P589
- DOI:
- -
- Abstract:
- The physical-chemical properties of the Earth’s interior are critically dependent on its high-P and high-T conditions, which are usually simulated with high-P and high-T experiments. How to improve the accuracy of the T measurement at high-P condition is thus crucial. This paper introduces some common aspects of the heating techniques, methods of temperature measurement, properties of thermocouples, and features of temperature distribution in the high-P cell assembly used on different large volume presses, provides some new experimental data about the power-temperature relations in the piston-cylinder apparatus, about the behavior of different thermocouples under different experimental conditions (especially under different oxygen fugacities), and about the temperature distribution in the cell assembly (with straight wall heater) in the cubic press, and tentatively explores how to improve the accuracy of the temperature measurement in the large volume press. It is suggested that in order to achieve a better temperature measurement, researchers must understand the target system, it P-T ranges, and the purpose of the present study, on which the type of the large volume press, the arrangement of the cell assembly, the shape and size of the heating element, and the way of the temperature measurement are based. We emphasize that the temperature measurement in the large volume press can be affected by a large number of complicated factors. A good understanding of these factors and taking them into consideration in designing the cell assembly will result in higher accuracy in the temperature measurement in the experiments carried out with the large volume press.
Last Update: 2018-07-27