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相关概念视频

Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Types Of Superconductors01:28

Types Of Superconductors

A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...

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相关实验视频

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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
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使用重稀土免费La (Fe,Si) 13基化合物进行多极度冷.

Benedikt Beckmann1, Lukas Pfeuffer1, Johanna Lill2

  • 1Functional Materials, Institute of Materials Science, Technical University of Darmstadt, 64287 Darmstadt, Germany.

ACS applied materials & interfaces
|July 11, 2024
PubMed
概括

多电热冷却为以稀土为基础的磁电热材料提供了一个可持续的替代方案,用于节能液化气体. 本研究探讨了一种使用压力和磁场用于先进冷应用的新方法.

关键词:
基于La(Fe,Si) 13的化合物气体液化过程中的液化气体.磁热热的 磁热热的一个多元的多元论坛.阶段过渡 阶段过渡 阶段过渡

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科学领域:

  • 材料科学 材料科学 材料科学
  • 热力学是一种热力学.
  • 可持续能源技术 可持续能源技术

背景情况:

  • 可再生能源转型需要节能技术,如磁热热冷却.
  • 目前的磁热材料依赖于关键的稀土元素,限制了全球的可持续性.
  • 低温气体液化需要先进的,环保的冷却解决方案.

研究的目的:

  • 探索使用La$_{0.7}$Ce$_{0.3}$Fe$_{11.6}$Si$_{1.4}$多铁材料的多重冷却的潜力.
  • 为了减轻在磁热制冷中对资源关键材料的依赖.
  • 为了研究使用结合的同位压力和磁场刺激来诱导相位过渡.

主要方法:

  • 采用了结合同otropic 压力和磁场的多元化冷却概念.
  • 劳动者La$_{0.7}$Ce$_{0.3}$Fe$_{11.6}$Si$_{1.4}$,是一种低成本,低关键性的多铁材料.
  • 测量的同热在广泛的温度范围 (190 K到30 K) 中发生变化.

主要成果:

  • 达到最大的异热变化高达-28 J (kg K) $^{-1}$.
  • 证明了在指定的温度范围内进行多度冷的可行性.
  • 探索了这种新的冷却方法的独特特性和挑战.

结论:

  • 多极度冷却为调整相位过渡特性提供了额外的自由度.
  • 这种方法可以导致节能且环保的气体液化.
  • 为特定目的而设计的非关键的多铁材料是可持续冷技术的关键.