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Related Concept Videos

Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

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Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
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Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

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Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
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Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
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Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

12.3K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
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Related Experiment Video

Updated: Jun 5, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

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Entropy-Mediated Crystallization Manipulation in Glass.

Xu Feng1, Guanfeng Gao2, Quanhua Lin1

  • 1State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 16, 2024
PubMed
Summary

Entropy engineering, a strategy for functional materials, is now applied to non-metallic glasses. This study demonstrates its use in controlling glass crystallization, leading to advanced optical materials.

Keywords:
entropy engineeringnanocrystal‐in‐glass compositenonlinear responsenon‐metallic glassstructure evolution

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Area of Science:

  • Materials Science
  • Glass Science
  • Crystallization Engineering

Background:

  • Entropy-mediated temperature-structure evolution is key in functional alloys and ceramics.
  • This strategy has not been previously applied to non-metallic glasses.
  • Understanding entropy's role is crucial for developing novel glass-based materials.

Purpose of the Study:

  • To demonstrate the application of entropy engineering in non-metallic glasses.
  • To manipulate the in situ crystallization process of glasses using entropy.
  • To compare entropy concepts across alloys, ceramics, and non-metallic glasses.

Main Methods:

  • Investigated entropy-stabilized effects in a niobosilicate glass system at various temperatures.
  • Analyzed the relationship between micro-configurations and entropic properties.
  • Employed entropy engineering to control glass crystallization.

Main Results:

  • Successfully applied entropy engineering to manipulate niobosilicate glass crystallization.
  • Developed a lithium niobate nanocrystal-in-glass (NiG) composite with high crystallinity.
  • Achieved 8x higher nonlinearity in the NiG composite compared to β-BBO crystal.

Conclusions:

  • Entropy engineering is a viable strategy for controlling non-metallic glass crystallization.
  • The developed NiG composite shows potential for advanced optical applications.
  • The study provides insights into entropy's role in glass micro-structures and properties.