Electrochemical making process and apparatus of super-miniature thermocouple
An electrochemical, ultra-micro technology, applied in the manufacture/processing of thermoelectric devices, the use of electrical devices, measurement devices, etc., can solve problems such as difficulty, high price, loss, etc., to improve the response speed, simple manufacturing process, holding handy effect
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Embodiment 1
[0044] Referring to Fig. 4a and Fig. 4b, thermocouple wire 7 is placed on a platform 10 as anode and cathode graphite 33 in parallel, one end of thermocouple wire 7 is connected to power supply 4 anodes, one end of cathode graphite rod 33 is connected to power supply 4 cathodes, from heat Electrolyte droplet 9 is dripped over the middle part of the couple wire 7 and the cathode graphite 33, and the closed circuit is connected to the power supply 53 through a wire 54, and the opening and closing of the circuit is realized by a switch; the diameter of the thermocouple wire 7 is in the tens of microns Ranges such as 80 microns, 100 microns or 200 microns etc. FIG. 4 b is a schematic diagram of ultra-fine thermocouple wires 72 obtained by etching the thermocouple wires 7 in the electrolyte in the present invention, thereby obtaining thermocouple wires 72 with significantly reduced sizes. The same method can be used to etch the constantan wire 82. Figure 4c is a schematic diagram o...
Embodiment 2
[0053] Example 2 is quite successful in processing miniature thermocouples with a slightly larger size, such as from several microns to tens of microns, but when the size of the thermocouple wire obtained by corrosion is quite small, such as tens of nanometers or less, its welding is quite difficult. But at this time, the ultra-miniature thermocouples can also be made under the basic point of the present invention to find other new processing procedures. The embodiment described below is an effective simplified solution, which can make the manufacturing process easier. The basic steps of this scheme are to firstly fabricate the thermocouple junction 88 of common size, and then use electrochemical method to etch the junction until a very small ultra-micro thermocouple junction is obtained. In this case, the welding procedure is carried out at the initial stage, and the welding of large-size thermocouples is quite easy. Just use ordinary electric sparks to weld the joints, avoid...
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Abstract
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