Тhe study of the effect of sublimation temperature of metals on their ice-forming properties under high relative humidity conditions
Clusters of nanofibers of metal oxides serve the object of the research. The paper studies the ice-forming properties of clusters of nanofibers of zinc, aluminum oxide. During the laboratory simulation, the experiments were carried out in conditions close to real ones − in an artificial cloud enviro...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
North-Caucasus Federal University
2025-04-01
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| Series: | Наука. Инновации. Технологии |
| Subjects: | |
| Online Access: | https://scienceit.elpub.ru/jour/article/view/711 |
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| Summary: | Clusters of nanofibers of metal oxides serve the object of the research. The paper studies the ice-forming properties of clusters of nanofibers of zinc, aluminum oxide. During the laboratory simulation, the experiments were carried out in conditions close to real ones − in an artificial cloud environment at subzero temperatures. A set of equipment, which includes small and large cloud chambers connected to each other by means of a pipe, was used. A reagent was placed in a small cloud chamber and water vapor was started. After creating an artificial fog, the reagent was thermally sublimated and the mixture was introduced into a large cloud chamber. At the bottom of the chamber, substrates were opened to collect reagent particles of the formed ice crystals. The reagent particles and ice crystals were then studied under optical and electron microscopes. The features of the synthesis of clusters from nanofibers of metal oxides and the specific yield depending on the sublimation temperature and relative humidity in the cloud chamber are revealed. Experiments have shown that when metals are sublimated at high temperatures (800–2000°C) in the presence of water, clusters that consist of tightly packed nanoparticles (filamentous nanofibers and nanotubes) are formed. Clusters, falling into a cloudy environment, are filled with water and active zones are triggered, ice crystals are formed. According to experimental data, metal oxides have good ice-forming properties, especially in the temperature range of –8... –9 °C. For zinc oxide, this indicator is about 1013 particles per 1 gram. Aluminum oxide exhibit less ice-forming activity. The experimental results show that there is a fundamental possibility and expediency of using clusters of metal oxide nanofibers as an additive to the standard pyrotechnic composition or as independent ice-forming reagents. |
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| ISSN: | 2308-4758 |