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Method for judging temperature by nano particle

A technology of nanoparticles and particles, applied in thermometers, thermometers with physical/chemical changes, measuring devices, etc., can solve the problems of mercury toxicity, limited maximum range of temperature measurement, limited measurement accuracy and scope of application, etc., and achieve rapid application Effect

Inactive Publication Date: 2009-07-01
JIANGSU TIANHENG NANO SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, mercury thermometers measure and calibrate temperature based on the volume change of mercury’s thermal expansion and cold contraction. Although it is intuitive, mercury itself is poisonous, and the maximum range of temperature measurement is limited; while thermocouples measure temperature by changing the thermoelectric effect of alloys. There are special requirements for materials, which require electrical signal conversion and display; spectral colorimetry measures temperature by the spectrum emitted by the heat source, and the temperature of the heat source must be high enough to emit the spectrum, and its measurement accuracy and scope of application are limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This example is used to compare the temperature of a high-temperature electric furnace. Two containers are placed on high-temperature electric furnaces at about 500°C and 1500°C respectively. When the liquid is heated, convection of the liquid in the vertical direction of gravity caused by the temperature difference will occur, making the nanoparticles It will quickly rise with the fluid, and compare the difference in temperature by comparing the light transmittance. The specific implementation process is:

[0018] Step 1: Fill the same volume of water in two cylindrical transparent containers with scales; then add the same mass of hydrophobic silica nanoparticles with an average particle size of 50 nanometers in the two containers, the The mass of nanoparticles is 5% of the liquid; one end of the cylindrical container is sealed with pure silver foil.

[0019] Step 2: When measuring the temperature, put the sealed ends of the two containers downward, and let the nanopa...

Embodiment 2

[0021] This example is used to compare the temperature of a high-temperature electric heating plate. Two containers are placed on high-temperature electric heating plates with different temperatures. Quickly rise with the fluid, and compare the difference in temperature by comparing the light transmittance. The specific implementation process is:

[0022] Step 1: Fill the same transparent liquid ethanol into two cylindrical transparent containers with a length of 20 centimeters and a diameter of 3 centimeters in 1 and 2, marked with scales. In these two containers, add the same mass of cobalt trioxide nanoparticles with an average particle diameter of 70 nanometers, and the amount of the nanoparticles added is 0.5% of the liquid ethanol. The bottom of the container is sealed with a pure stainless steel membrane.

[0023] Step 2: When measuring the temperature, put one end of the heat-conducting sealing material of the two containers of 1 and 2 facing down, use a centrifuge t...

Embodiment 3

[0025] This embodiment is used to compare the temperature of a certain high-temperature boiler tube. Place the two containers on the boiler pipes at different temperatures. When the liquid is heated, there will be convection of the liquid in the vertical direction of gravity caused by the temperature difference, so that the nanoparticles will rise with the fluid quickly. The difference in temperature can be compared by comparing the light transmittance . The specific implementation process is:

[0026] Step 1: Fill water in two columnar transparent containers marked with scales 1 and 2, and then add titanium dioxide nanoparticles with an average particle diameter of 30 nm in 1% liquid amount respectively in these two containers. The nanoparticle mass is liquid. The container is sealed at one end with solid gold foil.

[0027] Step 2: First, shake the two containers upside down at the same time, so that the titanium dioxide nanoparticles are evenly distributed in the liquid;...

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Abstract

The invention relates to a method for utilizing nanometer particles to judge temperature level, comprising: selecting hydrophobic titanium dioxide nanometer particles, cobaltousic oxide nanometer particles or other insoluble nanometer particles; utilizing the characteristic that the Brownian motion of nanometer particles will be enhanced in liquid; comparing the transmittances of nanometer particles in liquid under two different temperatures, to find temperature difference; or comparing the transmittance of the nanometer particles tested before heating and the liquid transmittance of the nanometer particles after heating, to obtain corresponding temperature range and value. The technical scheme provides a non-contact temperature measurement method, which can measure the range from normal temperature to high temperature above several thousands, can be used in most application fields of prior temperature measurement instruments, and can be used in the temperature measurements for high temperature electric furnace, industry kiln, steel making furnace, boiler, nuclear power station and the like. The method is characterized in visual, simple and fast temperature measurement and wide temperature application range.

Description

1. Technical field [0001] The invention relates to the field of temperature measurement, in particular to a method for judging the temperature by using nanoparticles. 2. Background technology [0002] Temperature measurement is a technology widely used in various industries. For a long time, thermometers, contact thermocouples and spectral colorimetry have been used as the main testing methods. The comparison of the spectrum of emitted photons is used to realize the comparison of temperature. Generally, mercury thermometers measure and calibrate temperature based on the volume change of mercury’s thermal expansion and cold contraction. Although it is intuitive, mercury itself is poisonous, and the maximum range of temperature measurement is limited; while thermocouples measure temperature by changing the thermoelectric effect of alloys. Materials have special requirements, and electrical signals need to be converted and displayed; spectral colorimetry measures temperature b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/12
Inventor 苏力宏乔生儒张亮
Owner JIANGSU TIANHENG NANO SCI & TECH
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