Contribution to the study of neon-nitrogen mixtures at low temperatures

[摘要] Theoretical studies show that neon can inuence the phase diagram of nitrogen, lowering its triple-point temperature. The use of a neon-nitrogen mixture that could remain liquid at temperatures below the triple-point of nitrogen (63.15 K) could solve some problems in the temperature range from 44 to 54 K, where no pure cryogenic liquids exist at all. This work consists of a preliminary study of mixtures of neon and nitrogen at low temperatures, in order to assess whether a liquid neon-nitrogen mixture below 63.15 K can be obtained. Indications that there may be a process of neon dilution in solid and liquid nitrogen are shown, as well as evidence of changes in the phase diagram of nitrogen due to the introduction of neon, in comparison to a model that supposes no interaction between the two substances. Evidences of a change in the nitrogen triple-point temperature from 63.15 to 62.5 K are presented and discussed.

[发布机构] LIBPhys, Physics Department, Faculty of Sciences and Technology, Universidade Nova de Lisboa, Caparica; 2829-516, Portugal^1

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Liquid neon;Low temperatures;Temperature range;Theoretical study;Triple point temperatures;Triple points