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Temperature sensitive composite materials and preparing process thereof

A composite material and temperature-sensitive technology, which is applied in the field of nano-copper-based temperature-sensitive composite materials, can solve the problems of slow thermal response speed and low thermal conductivity, and achieve the effects of fast thermal response speed, simple process and cheap raw materials

Inactive Publication Date: 2006-09-27
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although paraffin wax has the advantage of good thermal expansion as a temperature-sensitive material, it has the disadvantage of low thermal conductivity as an organic substance. Due to the low thermal conductivity of paraffin wax itself, its thermal response speed is slow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Raw material preparation: copper powder 2kg, paraffin wax (melting point 43~45℃) 1kg

[0023] Material preparation: After mixing the components according to a certain ratio, put them in an agate jar, use agate balls of different sizes, and under the protection of argon, mill the temperature-sensitive composite material by a planetary high-energy ball mill for 80 hours. . The rotational speed of the ball mill is 200r / min.

[0024] The obtained temperature-sensitive composite material was put into a self-made copper tube (diameter 5mm, length 20mm, one end closed), and prepared by hot pressing molding (the molding temperature was close to the melting point of the selected paraffin wax). Placed in a constant temperature water bath at 50°C, the relative expansion reached 7.5% in 40 seconds, the composite material was not dissolved and collapsed, and the protruding part became columnar.

Embodiment 2

[0026] Raw material preparation: copper powder 4kg, paraffin wax (melting point 43~45℃) 1kg

[0027] Material preparation: After mixing the components according to a certain ratio, put them in an agate jar, use agate balls of different sizes, and under the protection of argon, mill them with a planetary high-energy ball mill for 50 hours to prepare the temperature-sensitive composite material . The rotational speed of the ball mill is 200r / min.

Embodiment 3

[0029] Raw material preparation: copper powder 4kg, paraffin wax (melting point 43~45℃) 0.5kg

[0030] Material preparation: After mixing the components in a certain proportion, put them in an agate jar, use agate balls of different sizes, and under the protection of argon, mill them for 100 hours with a planetary high-energy ball mill to prepare the temperature-sensitive composite material . The rotational speed of the ball mill is 200r / min.

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Abstract

The invention discloses a temperature-sensitive composite material and preparing method, which is characterized by the following: blending the copper and vax at inert gas protection; balling 50-150 h in the baler to produce temperature-sensitive composite material. The invention possesses good heat dilatability and easy manufacturing mould, which is benefit to do industrial production.

Description

(1) Technical field [0001] The invention relates to a temperature-sensitive composite material, in particular to a nanometer copper-based temperature-sensitive composite material. (2) Background technology [0002] Temperature-sensitive materials integrate sensing, driving and material structure, and have the functions of perception, driving and automatic control. [0003] At present, the research and development of temperature-sensitive materials at home and abroad are mainly concentrated in several fields such as bimetallic sheets, shape memory alloys, temperature-sensitive shape memory polymers and temperature-sensitive ferrites. For bimetal sheets and shape memory alloys, although they have good heat sensitivity, the shape of the material is fixed and cannot be changed with the structure of the measurement and control element. There are also disadvantages such as instability in the bimetal sheet. Among shape memory alloys, nickel-titanium-based alloys have good shape m...

Claims

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Application Information

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IPC IPC(8): C08L91/06C08K3/08B22F1/02C09K5/14
Inventor 楼白杨徐斌
Owner ZHEJIANG UNIV OF TECH
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