Anti-perovskite material with room-temperature magnetic refrigeration performance and preparation method and application thereof

An anti-perovskite, magnetic refrigeration technology, applied in the fields of inorganic material magnetism, inductor/transformer/magnet manufacturing, electrical components, etc., can solve the problems of harsh equipment requirements, complex preparation process, harmful raw materials, etc., and achieve excellent stability , huge application potential and prospects, the effect of magnetic transition temperature and saturation magnetization improvement

Pending Publication Date: 2022-07-29
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems existing in existing magnetic refrigeration materials and devices, such as easy oxidation, high price, complex preparation process, harsh equipment requirements and harmful raw materials, the present invention provides an antiperovskite material with room temperature magnetic refrigeration performance and its preparation method and Application, the raw materials used in the present invention are low in price, environmentally friendly, high in stability, simple in preparation process, suitable for mass production, and effectively solve the key problems existing in current magnetic refrigeration materials and products

Method used

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  • Anti-perovskite material with room-temperature magnetic refrigeration performance and preparation method and application thereof
  • Anti-perovskite material with room-temperature magnetic refrigeration performance and preparation method and application thereof
  • Anti-perovskite material with room-temperature magnetic refrigeration performance and preparation method and application thereof

Examples

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Embodiment 1

[0022] A preparation method of an anti-perovskite material with room temperature magnetic refrigeration performance, comprising the following steps:

[0023] (1) According to the molar ratio of Sn:Fe=0.6:3.4, SnO 2 and Fe 2 O 3 Proportioning by weighing, in SnO 2 and Fe 2 O 3 100wt% of absolute ethanol was added to the mixed raw materials for one hour grinding and mixing to obtain a mixed slurry with uniform composition.

[0024] (2) The mixed slurry uniformly mixed in step 1 is dried at 70° C. for two hours in an electric heating blast drying oven, and the dried material is obtained after crushing and grinding.

[0025] (3) Place the material obtained in step 2 in a quartz boat, then put it into a sintering furnace, heat the sintering furnace to make its temperature rise to 650°C, and simultaneously feed the sintering furnace with a gas flow rate of 200 cc / min Ammonia gas is nitriding, and the nitriding time is 15 hours to obtain a pre-phased sample

[0026] (4) After ...

Embodiment 2

[0028] Different from Example 1, SnO in Example 2 2 and Fe 2 O 3 The molar ratio of Sn:Fe is 0.8:3.2, and other preparation processes are the same as in Example 1; the prepared anti-perovskite material is denoted as Sn 0.8 NFe 3.2 .

Embodiment 3

[0030] Different from Example 1, SnO in Example 3 2 and Fe 2 O 3 The molar ratio of Sn:Fe is 1:3, and other preparation processes are the same as in Example 1; the prepared anti-perovskite material is denoted as Sn 1 NFe 3 .

[0031] The samples prepared in the above-described embodiments are tested for performance, and the results are analyzed as follows:

[0032] figure 1 For the XRD patterns of the materials prepared in Examples 1 to 3, from figure 1 It can be seen that the present invention realizes Sn through the doping control of atoms. 1-x NFe 3+x The anti-perovskite doped series samples were prepared, and high-quality pure-phase samples were obtained, and the lattice constants complied with the doping law, showing a linear decreasing trend.

[0033] figure 2 The magnetic performance test results for the materials prepared in Examples 1 to 3 in 5K and 300K environments, respectively, from figure 2 It can be seen that the transformation of the sample from ant...

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Abstract

The invention discloses an anti-perovskite material with room-temperature magnetic refrigeration performance and a preparation method and application thereof, the chemical structural formula of the anti-perovskite material is M < 1-x > NFe < 3 + x >, M is a doped metal selected from one of Ga, Ge, Sn or Zn; n is nitrogen, Fe is iron, and x is more than or equal to 0 and less than or equal to 0.4. The invention also discloses a preparation method of the material and application of the material as a room-temperature magnetic refrigeration material in the field of room-temperature magnetic refrigeration. According to the invention, the content and occupation condition of magnetic ions are changed in an atom doping substitution mode, the exchange effect among the magnetic ions in a system is enhanced, the magnetic transition temperature and saturation magnetization are greatly improved, and the anti-perovskite material with room-temperature magnetic refrigeration capability and high refrigeration performance is obtained. The preparation method provided by the invention is simple to operate and low in cost, and has huge application potential and prospect.

Description

technical field [0001] The invention belongs to the technical field of refrigeration materials, and in particular relates to an anti-perovskite material with room temperature magnetic refrigeration performance and a preparation method and application thereof. Background technique [0002] With the rapid development and rapid change of science and technology, magnetic materials are playing an increasingly important role in promoting or accelerating the vigorous development of various modern technologies, and are considered to be one of the important factors leading the future prosperity of science and technology. As an important new class of functional materials, iron-based anti-perovskite compounds have rich magnetic properties and great application potential, and have become a research hotspot in many fields such as physics, information, and materials. Among them, iron-based anti-perovskite compounds have the characteristics of high saturation magnetization and steep magnet...

Claims

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Application Information

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IPC IPC(8): H01F1/01H01F41/00
CPCH01F1/017H01F41/00
Inventor 刘超成段恒利闫文盛
Owner UNIV OF SCI & TECH OF CHINA
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