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Magnetic calorific composite material and method for manufacturing thereof

A technology of composite materials and magnetocaloric materials, which is applied in the field of magnetocaloric composite materials and its manufacturing, can solve problems such as crystal structure destruction and magnetocaloric effect reduction

Inactive Publication Date: 2021-06-18
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, part of the crystal structure is destroyed during sintering, and the magnetocaloric effect decreases

Method used

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  • Magnetic calorific composite material and method for manufacturing thereof
  • Magnetic calorific composite material and method for manufacturing thereof
  • Magnetic calorific composite material and method for manufacturing thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] Hereinafter, the present invention will be described in more detail by giving production examples, examples, and comparative examples, but the present invention is not limited by these examples.

manufacture example

[0078] A magnetocaloric composite material was manufactured by the following procedure.

[0079] [(1) Precursor production process]

[0080] The raw material powder of the single element is mixed in a predetermined ratio, and the precursor of the magneto-caloric material is produced by the suction casting method in an inert gas atmosphere. As the raw material powder, a material with a purity of 4N was used. In addition, since rare earths such as lanthanum (La), cerium (Ce), praseodymium (Pr), and neodymium (Nd) volatilize when dissolved, an additional 10 atm% is weighed.

[0081] [(2) Manufacturing process of magnetocaloric material]

[0082] NaZn with a crystalline structure is produced by heat-treating the obtained precursor in a muffle furnace. 13 intermediate material. Specifically, in order to prevent volatilization of rare earth elements, vacuum seal in a quartz tube so that the degree of vacuum is 10 to 5 Torr, and perform heat treatment at 1100° C. to 1200° C. for ...

Embodiment 1

[0089] [Example 1: Study of Binder]

[0090] In order to confirm the effectiveness of the magnetocaloric composite material of the present invention, a magnetocaloric composite material containing an alloy binder, a composite material containing a resin binder as a conventional composite material, and a magnetocaloric material not using a binder were fabricated. The sintered body was compared in terms of thermal and magnetic properties.

[0091] For the magnetocaloric material, La was commonly used in Example 1-1 and Comparative Examples 1-1 to 1-2 1-a A a (Fe b B c Si 1-b-c ) 13 h d La(Fe 0.89 Si 0.11 ) 13 H.

[0092] In Example 1-1, a magnetocaloric composite material was obtained using a binary system of SnIn as a binder and the magnetocaloric material obtained by the above-mentioned predetermined production method. The ratio of the alloy as a binder was set to 15 wt%.

[0093] In Comparative Example 1-1, a composite material containing a resin binder was produc...

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Abstract

The invention provides a magnetic calorific composite material containing a magnetic calorific material and an alloy binder having a melting point in a range of 100 DEG C. to 150 DEG C., in which a content of the alloy binder is 7.5 to 22.5 wt %, and a method for manufacturing thereof.

Description

technical field [0001] The invention relates to a magnetocaloric material, a magnetocaloric composite material containing a binder and a manufacturing method thereof. Background technique [0002] In many vapor compression heat pumps of air conditioners, refrigerators, etc., substitutes for Freon, which has a high global warming coefficient, are used. At the MOP28 held in Kigali, Rwanda in 2016, the amendment to the Montreal Protocol that introduced Freon substitutes as new restrictions was adopted, and so on, and environmental considerations in this field are gradually becoming important. Based on this background, the practical application of new heat pumps with lower environmental burdens is demanded. [0003] In recent years, expectations for magnetic cryogenic technology have increased as candidates for environmentally friendly and efficient freezing technology, and research and development of room temperature magnetic cryogenic technology has been actively carried out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/01H01F41/00F25B21/00
CPCF25B21/00F25B2321/002H01F1/015H01F41/00B22F2998/10C22C1/03C22C13/00C22C33/02C22C38/005C22C2202/02B22F2009/043B22F3/14C22C32/0089
Inventor 酒井一树吉田大哲
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD