Thermocouple with micron or nanometer grade tip curvature radius and method for producing the same

A technology of curvature radius and manufacturing method, which is applied in the field of thermal detection, can solve problems affecting fluid temperature field and measurement accuracy, fluid motion interference, etc., and achieve the effect of overcoming the influence of response frequency, improving spatial resolution, and increasing response frequency

Inactive Publication Date: 2009-07-29
SOUTHEAST UNIV
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Problems solved by technology

When the outer large substrate is inserted into the fluid, it will interfere with the movement of the fluid, affecting the temperature field of the fluid and measurement accuracy

Method used

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  • Thermocouple with micron or nanometer grade tip curvature radius and method for producing the same
  • Thermocouple with micron or nanometer grade tip curvature radius and method for producing the same
  • Thermocouple with micron or nanometer grade tip curvature radius and method for producing the same

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example

[0026] To prepare T-type micro / nano thermocouples (constantan and copper), use constantan wire as the substrate, first select the constantan wire with a diameter of 0.3mm, and use the electrochemical corrosion method to prepare micron-scale needle points. The device (such as figure 2 ) includes a programmable power supply 21, a vessel 22 filled with corrosive solution, an annular graphite electrode 23 as a cathode, a transmission connecting rod 25, and a micron displacement platform 26.

[0027] The first step is to straighten the constantan wire to be corroded, anneal it, cut it into 8cm small sections 24, and fix it on the micron displacement platform 26 which can be adjusted up and down accurately through the transmission connecting rod 25, and adjust it vertically to the corrosion liquid surface, and slowly adjust it downward. The knob 27 makes the constantan wire 24 just touch the corrosion liquid surface, and from this point, the insertion depth of the constantan wire in...

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Abstract

The invention discloses a thermocouple with micron scale or nanometer scale tip curvature radius and a manufacturing method thereof, and relates to a micron/nano thermocouple manufacturing method which can quickly respond to temperature variation in a tiny area and employs an electrochemical process for corrosion and a vacuum deposition technique to process the thermocouple with the tip curvature radius ranging from tens of microns to a plurality of nanometers. The thermocouple is composed of three parts, a metal needle point (11) with the micron scale or nanometer scale tip curvature radius is taken as a substrate, an insulating layer (12) is wrapped outside the substrate, the tip of the metal needle point (11) is exposed, and a layer of metal film (13) is arranged on the tip of the insulating layer (12) and the exposed metal needle point (11).

Description

technical field [0001] The invention belongs to the field of thermal detection of thermocouples and their production methods, and in particular to a thermocouple with a diameter ranging from tens of microns to tens of nanometers that is temperature-sensitive to micro regions by using electrochemical corrosion, micro-nano control and vacuum evaporation technologies. A method for preparing a micro / nano thermocouple capable of rapid response to changes and a preparation device thereof. Background technique [0002] Temperature is a physical quantity that expresses the degree of hot or cold of an object. Microscopically speaking, it refers to the intensity of thermal motion of object molecules. Temperature can only be measured indirectly through certain characteristics of objects that change with temperature, and the scale used to measure the temperature of objects is called a temperature scale. Temperature measurement is the most common measurement item in industry, agricultur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/02C23C14/24C23C14/16C25F3/02
Inventor 顾宁汪长岭
Owner SOUTHEAST UNIV
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