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When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
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A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
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Related Experiment Video

Updated: Feb 13, 2026

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
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Research Progress of Porous Radiative Cooling Films Based on Phase Separation Method.

Shicheng Lu1, Youliang Cheng1, Mengyao Li2

  • 1Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, China.

Nanomaterials (Basel, Switzerland)
|February 12, 2026
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Summary

Researchers explore porous radiative cooling films made using phase separation. This method offers efficient, passive cooling for environmental and energy-saving applications like green buildings and food preservation.

Keywords:
filmsphase separationporous structureradiative coolingthermal management

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Area of Science:

  • Materials Science
  • Environmental Science
  • Thermodynamics

Background:

  • Global climate change and environmental issues necessitate high-efficiency cooling technologies and energy-saving materials.
  • Radiative cooling offers a passive, energy-efficient solution by reflecting sunlight and emitting thermal radiation.
  • Porous daytime radiative cooling materials are crucial for sustainable thermal management.

Purpose of the Study:

  • To review preparation methods, structural design, and applications of porous radiative cooling films.
  • To highlight the advantages of the phase separation method for fabricating these materials.
  • To assess the potential of these films in various fields.

Main Methods:

  • Fabrication of porous radiative cooling films via the phase separation method.
  • Analysis of structural properties influencing radiative cooling performance.
  • Evaluation of cooling efficiency under different environmental conditions.

Main Results:

  • The phase separation method is a scalable and cost-effective approach for creating porous radiative cooling films.
  • These films demonstrate favorable processability and excellent cooling performance.
  • Optimized structural design enhances sunlight reflection and thermal emission.

Conclusions:

  • Phase-separated porous radiative cooling films are a promising technology for passive cooling.
  • Potential applications include green buildings, personal thermal management, and food preservation.
  • Further research can optimize material properties for enhanced cooling efficiency and broader adoption.