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Preparation method of Pd-In-Fe elastic-thermal refrigerating material with linear superelasticity

A pd-in-fe, superelastic technology, applied in the field of preparation of Pd-In-Fe type elastocaloric refrigeration materials, can solve problems not involved in the research of deep subcooling treatment, and achieve improved refrigeration efficiency and small hysteresis of linear superelasticity , good reproducible effect

Active Publication Date: 2019-01-01
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

Patent documents on deep subcooling such as CN201010292281, CN200310122735, and CN03114937 are all aimed at preparing alloys with oriented structures, and none of them involve the research of deep subcooling in the field of elastothermic refrigeration

Method used

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  • Preparation method of Pd-In-Fe elastic-thermal refrigerating material with linear superelasticity
  • Preparation method of Pd-In-Fe elastic-thermal refrigerating material with linear superelasticity
  • Preparation method of Pd-In-Fe elastic-thermal refrigerating material with linear superelasticity

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Embodiment 1

[0043] In this embodiment, the elastothermal refrigeration alloy material is Pd 59.3 In 23.2 Fe 17.5 , same as Comparative Example 1. In this embodiment, the Pd-In-Fe type elastothermal refrigeration alloy is prepared by using the deep subcooling technology of molten glass and cyclic superheating treatment, and the specific preparation process is as follows:

[0044] (1) exactly the same as step (1) in comparative example 1, obtain alloy ingot;

[0045] (2) Get about 6g of this alloy ingot sample and pack into a quartz crucible, select commercial NiSiGa glass as a purifier, put the alloy ingot into a quartz crucible, fully coat the alloy ingot with a glass purifier, the glass purifier Components and their mass percent content are: SiO 2 The content is 74.0%, Na 2 O and K 2 The mixture content of O is 15%, CaO content is 7%, Al 2 o 3 content of 2%, MgO content of 1.8%, and Fe 2 o 3 The content is 0.2%.

[0046] Fix the quartz crucible in the induction coil of the hig...

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Abstract

The invention provides a preparation method of a Pd-In-Fe elastic-thermal refrigerating material with linear superelasticity. The method comprises the following steps: smelting an alloy raw material to form alloy ingots, and obtaining a Pd-In-Fe elastic-thermal refrigerating material by adopting molten glass and a circular overheat treatment deep supercooling technology. A superelasticity curve ofthe obtained Pd-In-Fe elastic-thermal refrigerating material has linear characteristics; and moreover, by virtue of multiple circulations, the shape of the curve is unchanged, the superelasticity isstable, and the obtained Pd-In-Fe elastic-thermal refrigerating material has a potential application prospect in the field of elastic-thermal refrigeration.

Description

technical field [0001] The invention belongs to the technical field of elastocaloric refrigeration materials, and in particular relates to a preparation method of a Pd-In-Fe type elastocaloric refrigeration material with linear superelasticity. Background technique [0002] With the increasingly serious energy crisis and environmental problems, traditional gas compression refrigeration can no longer meet the needs of green energy saving due to its shortcomings such as low efficiency, polluting the environment, and high noise. The advantages of high efficiency and low energy consumption have attracted more and more researchers' attention. Among them, the elastothermic cooling of shape memory alloys (SMAs) based on stress-induced martensitic transformation is one of the current research hotspots in solid-state cooling. In the 2014 U.S. Department of Energy's assessment report on new refrigeration technologies, elastothermal refrigeration ranked first among the 17 most promisi...

Claims

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Application Information

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IPC IPC(8): C22C5/04C22C1/02C22C1/06C22F1/14
CPCC22C1/02C22C1/06C22C5/04C22F1/14
Inventor 刘剑沈琪孙文魏志阳张明晓闫阿儒
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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