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Cobalt-manganese-tin-based alloy material and preparation method thereof

An alloy material, cobalt-manganese-tin-based technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of restricting the development and application of materials, and achieve the goal of avoiding thermal hysteresis effect, broad application prospects, and large magnetocaloric effect Effect

Active Publication Date: 2021-10-26
天津市京建建筑防水工程有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages associated with the first-order phase transition, such as a small operating temperature range and large hysteresis and thermal hysteresis losses, limit the further development and application of this material.

Method used

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  • Cobalt-manganese-tin-based alloy material and preparation method thereof
  • Cobalt-manganese-tin-based alloy material and preparation method thereof
  • Cobalt-manganese-tin-based alloy material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: Cobalt (purity: 99.99%), manganese (purity: 99.6%), tin (purity: 99.999%) elemental metals were weighed according to the molar ratio of 0.98:1.02:1, and placed in a vacuum electric arc furnace. Before arcing and smelting, first use a mechanical pump to evacuate the furnace cavity to a vacuum degree lower than 2 Pa, and then turn on the molecular pump to evacuate to a furnace cavity vacuum degree lower than 10 Pa. -4 Pa. Then pass into high-purity argon (99.999%) to clean the furnace chamber until the vacuum degree of the furnace chamber is 1 atmosphere (0.8atm), and then vacuumize to 10 -4 Pa, repeat the above steps three times. Use 30A current to start the arc, then move the electrode to the top of the sample, keep the distance between the electrode and the sample at 0.5-1cm, slowly adjust the current to 80A until the sample is completely melted and form an alloy, then reduce the current to 60A for 30s, after the end of the current Adjust to zero. After t...

Embodiment 2

[0023] Example 2: Except that the molar addition ratio of cobalt, manganese, and tin components is 0.96:1.04:1, other steps are the same as in Example 1.

Embodiment 3

[0024] Embodiment 3: except that the molar addition ratio of each component of cobalt, manganese, and tin is 0.94:1.06:1, all the other steps are identical with embodiment 1.

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Abstract

The invention belongs to the field of magnetic refrigeration, and specifically relates to a cobalt-manganese-tin-based alloy material and a preparation method thereof. The molecular formula of the cobalt-manganese-tin-based alloy material is Co 1‑x mn 1+x Sn, where x=0.02‑0.10, its structure is hexagonal. The alloy material overcomes the shortcomings of the small magnetic entropy change half-peak width and large thermal hysteresis of the first-order magnetic phase transition. Its phase transition behavior is a second-order magnetic phase transition, which has a large magnetocaloric effect and avoids Large thermal hysteresis effect. Cobalt-manganese-tin alloy has low cost and broad application prospects, and can be applied to many important fields of the national economy involving refrigeration and cryogenic technology.

Description

technical field [0001] The invention belongs to the field of magnetic refrigeration, and in particular relates to a cobalt-manganese-tin-based alloy material and a preparation method thereof. Background technique [0002] In recent years, people pay more and more attention to environmental protection and efficient use of energy. The commonly used refrigeration technology is the traditional gas compression refrigeration. One of the key problems is that the working gas is halogenated substances of light hydrocarbons such as ammonia, carbon dioxide and freon. The widely used freon refrigerant has a great depletion effect on ozone. . Although people have begun to use alternative refrigerants to replace Freon, the commonly used synthetic alternatives usually have a strong greenhouse effect. Another key problem of traditional refrigeration technology is the high energy consumption. In today's increasingly tense energy environment, it has become an urgent problem to be solved wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/04C22C1/02C22F1/00H01F1/01
CPCC22C1/02C22C30/04C22F1/002H01F1/015
Inventor 郭振刚李慧王誉洪王森
Owner 天津市京建建筑防水工程有限公司
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