For samples in the gaseous state at room temperature and ambient pressure,mature technology has been developed to encapsulate them in a diamond anvil cell(DAC).However,the large volume press(LVP)can only treat samples...For samples in the gaseous state at room temperature and ambient pressure,mature technology has been developed to encapsulate them in a diamond anvil cell(DAC).However,the large volume press(LVP)can only treat samples with starting materials in solid or liquid form.We have achieved stable encapsulation and reaction treatment of carbon dioxide in a centimeter sized sample chamber for a long time(over 10 min)under conditions of temperature higher than 1200C and pressure over 5 GPa through the use of integrated low-temperature freezing and rapid compression sealing method for LVP cell assemblies.This technology can also be applied to the packaging of other gaseous or liquid samples,such as ammonia,sulfur dioxide,water,etc.in LVP devices.展开更多
In this paper,the Joule-Thomson expansion of Born-Infeld AdS black holes is studied in the extended phase space,where the cosmological constant is identified with the pressure.The Joule-Thomson coefficient,the inversi...In this paper,the Joule-Thomson expansion of Born-Infeld AdS black holes is studied in the extended phase space,where the cosmological constant is identified with the pressure.The Joule-Thomson coefficient,the inversion curves and the isenthalpic curves are discussed in detail using a 4-dimensional black hole.The critical point of a Born-Infeld black hole is depicted with varying parameter β and the charge Q.In T-P plane,the inversion temperature curves and isenthalpic curves are obtained with different parameter β and charge Q.We find that the missing negative slope is still conserved in Born-Infeld black holes.We also extend our discussion to arbitrary dimension higher than 4.The critical temperature and the minimum of inversion temperature are compared.The ratio is asymptotically 1/2 as Q increases or β→∞ with D=4 ,and reproduces previous results at higher dimensions.展开更多
基金supported by the National Key R&D Program of China(Grant No.2023YFA1406200).
文摘For samples in the gaseous state at room temperature and ambient pressure,mature technology has been developed to encapsulate them in a diamond anvil cell(DAC).However,the large volume press(LVP)can only treat samples with starting materials in solid or liquid form.We have achieved stable encapsulation and reaction treatment of carbon dioxide in a centimeter sized sample chamber for a long time(over 10 min)under conditions of temperature higher than 1200C and pressure over 5 GPa through the use of integrated low-temperature freezing and rapid compression sealing method for LVP cell assemblies.This technology can also be applied to the packaging of other gaseous or liquid samples,such as ammonia,sulfur dioxide,water,etc.in LVP devices.
基金Supported by National Natural Science Foundation of China(11947408)。
文摘In this paper,the Joule-Thomson expansion of Born-Infeld AdS black holes is studied in the extended phase space,where the cosmological constant is identified with the pressure.The Joule-Thomson coefficient,the inversion curves and the isenthalpic curves are discussed in detail using a 4-dimensional black hole.The critical point of a Born-Infeld black hole is depicted with varying parameter β and the charge Q.In T-P plane,the inversion temperature curves and isenthalpic curves are obtained with different parameter β and charge Q.We find that the missing negative slope is still conserved in Born-Infeld black holes.We also extend our discussion to arbitrary dimension higher than 4.The critical temperature and the minimum of inversion temperature are compared.The ratio is asymptotically 1/2 as Q increases or β→∞ with D=4 ,and reproduces previous results at higher dimensions.
