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Liquid metal based flexible resistance micro heater

A liquid metal and micro-heater technology, applied in the direction of heating element materials, etc., can solve the problems that the heater cannot continuously provide heat, and the working temperature of the electrode of the flexible resistance micro-heater is limited, so as to improve the working temperature range and service life , Improve flexibility, ease of processing and mass production

Active Publication Date: 2019-10-29
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the working temperature of the electrode of the flexible resistance micro-heater in the prior art is limited, and the heater cannot continuously provide heat in each temperature zone, the purpose of the present invention is to provide a Long and easily fabricated microheater based on composite liquid metal electrodes

Method used

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  • Liquid metal based flexible resistance micro heater
  • Liquid metal based flexible resistance micro heater
  • Liquid metal based flexible resistance micro heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] see figure 1 , a flexible resistance micro-heater, including a housing 1 made of PDMS, a liquid metal resistor, and a lead wire 4. The length and width of the housing 1 are 2cm×1cm, and the upper surface of the housing is provided with a heating device for carrying an object to be heated. area, a liquid metal resistance flow channel is set in the shell, and the liquid metal resistance flow channel is filled with composite liquid metal.

[0034] figure 1 It is a structural schematic diagram of a top view angle. In this embodiment, the liquid metal resistance is composed of three metal segments, one segment of liquid metal at normal temperature and two segments of solid metal at normal temperature. The two sides are solid metal 2 at normal temperature (bismuth-based alloy, Bi 32.5 In 51 sn 16 .5, the melting point is 60 degrees Celsius), and the middle is liquid metal 3 at room temperature (gallium-based alloy, Ga 62 In 25 sn 13 Melting point is 11 degrees Celsius)....

Embodiment 2

[0039] see figure 2 , a kind of flexible resistance microheater, comprises the microcolumn 6 that shell 1, PDMS are made by PDMS (the length, width and height of a single microcolumn are 30 micrometers, 50 micrometers, 100 micrometers, between microcolumn and microcolumn The distance between them is 30 microns) The liquid metal resistance is a single type of liquid metal at room temperature 3 (Ga 62 In 25 sn 13 Melting point is 11 degrees centigrade) and lead wire 4, air runner 5. The length and width of the housing 1 are 2cm×1cm, and the upper surface of the housing is provided with a heating area for carrying the object to be heated, and the housing is filled with the single liquid metal. The housing 1 is provided with a liquid metal resistance flow channel and an air flow channel, the liquid metal resistance is filled in the liquid metal resistance flow channel, and a plurality of microcolumns are arranged between the liquid metal resistance flow channel and the air flo...

Embodiment 3

[0043] see image 3 , based on the similar beneficial effects of Example 2, this case proposes a method for directly connecting the air flow channel 5 and the single liquid metal electrode flow channel 3 without micro-pillars. image 3 It is a schematic diagram of the structure with a soluble film 7 from a top view. The air flow channel and the liquid metal flow channel are separated by a layer of soluble film 7 (such as a PDMS template, starch film), and the liquid metal is injected into the electrode flow channel. The soluble film is dissolved away with a solvent (such as toluene, acetone, etc.). Finally, a structure in which the liquid metal flow channel is directly connected to the air flow channel is formed. Due to the high surface tension of the liquid metal, the liquid metal remains in the area of ​​the liquid metal resistance flow channel after the soluble film 7 is removed.

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Abstract

The invention provides a liquid metal based flexible resistance micro heater. The micro heater includes an external flexible base material shell, a liquid metal resistor and lead wires; the external flexible base material shell completely or partially wraps the liquid metal resistor; the shell is provided with a liquid metal resistor flow path and / or air flow path, and the outer surface of the shell is a heating area; the liquid metal resistor is formed by single liquid metal or composite liquid metal; and the composite liquid metal consists of more than two kinds of metal, at least one kind of metal maintains a liquid state at normal temperature, and the metal is single metal or alloy. The liquid metal can be utilized to generate joule heat by being powered on, and the flexibility of themicro heater can be greatly enhanced by the external flexible shell and the liquid metal; through the improvement of the components or structures of the liquid metal, the operating temperature range and service life of the heater can be significantly prolonged; and the micro heater is easy to process and produce in batches, so that the micro heater can be applied to the fields of medical devices,biochemical instruments and high-end manufacturing equipment.

Description

technical field [0001] The invention belongs to the field of industrial equipment, and in particular relates to a heating device based on liquid metal. Background technique [0002] Flexible micro-heaters have been one of the hot pursuits in the fields of high-end manufacturing and academic research in recent years. Flexible micro-heaters that can provide continuous and stable heat can be widely used in precision medical devices and implanted electronic devices. [0003] The main problems of current flexible resistive micro-heaters include the short service life of the micro-heaters and the inability to provide heat continuously. Since the electrodes of the micro-heater need to work normally in various temperature zones, the working temperature of the current flexible electrodes is greatly limited in order to ensure flexibility. The flexible resistance micro-heater using the composite liquid metal electrode can effectively expand the working temperature of the flexible elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/12
CPCH05B3/12
Inventor 桂林张伦嘉高猛
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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