CN209446505U - A kind of measuring device for graphene film thermo electric material Electrothermal Properties - Google Patents
A kind of measuring device for graphene film thermo electric material Electrothermal Properties Download PDFInfo
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- CN209446505U CN209446505U CN201920007404.1U CN201920007404U CN209446505U CN 209446505 U CN209446505 U CN 209446505U CN 201920007404 U CN201920007404 U CN 201920007404U CN 209446505 U CN209446505 U CN 209446505U
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Abstract
The utility model relates to a kind of measuring devices for graphene film thermo electric material Electrothermal Properties, belong to the thin Electrothermal Properties field of measuring technique of graphene, solve the problems, such as that existing measuring device is difficult to precise measurement radiant heat transfer accounting.The device of the measurement graphene film thermo electric material Electrothermal Properties of the utility model, including electric control system, test macro and data collection and processing system；Electric control system is for exporting constant current or constant voltage；Test macro is used to obtain the electric current, voltage and temperature information of graphene film layer sample, and test macro includes Electrothermal Properties thermometric room, and Electrothermal Properties thermometric room is equipped with thermocouple；Data collection and processing system is used to collect electric current, voltage and the temperature information of test macro acquisition and is handled, and obtains the Electrothermal Properties data of graphene film thermo electric material.The utility model realizes the precise measurement of the thin Electrothermal Properties of graphene.
Description
Technical field
The utility model relates to graphene Electrothermal Properties field of measuring technique, more particularly to one kind is for graphene film electricity
The measuring device of hot material Electrothermal Properties.
Background technique
Graphene is a kind of new carbon, and grapheme material has excellent electric conductivity, thermal conductivity, zero defect single layer stone
The thermal coefficient of black alkene is up to 5300W/mK.Graphene is the most thin material being currently known, and has excellent mechanical performance (its
Theoretical Young's modulus reaches 1.0TPa, tensile strength 130GPa), big (the up to 2630m of theoretical specific surface area2/ g), carrier moves
Fast (the 200000cm of shifting rate2/ (V.s)) etc. excellent physicochemical property, research field focuses primarily upon composite material, battery at present
Electrode, supercapacitor, energy storage material, catalyst, the fields such as thin-film material.
Traditional thermo electric material is divided into metal material and ceramic material two major classes, and the thermo electric material price of metal material is just
Preferably, easy to process, but that there is also density simultaneously is big, hardness is high, not corrosion-resistant, preparation process not environmentally the disadvantages of.Ceramic material
Heating rate is slow, and possesses very big brittleness.New electrically heating material is especially received with various carbon containing or with various nano materials
Rice material thermo electric material as main component.It is compared to metallic resistance silk, carbon nanomaterial has from a wealth of sources and environmentally friendly, surpasses
Light weight is compared to ceramic material, and rapidly, flexibility is good for carbon nanomaterial heating.Moreover, with various carbon nanometer materials
Material, such as carbon nanotube, the thermo electric material of the preparations such as graphene also have lower starting voltage, higher electric conversion efficiency with
And radiant heat transfer accounting.
In electric heating conversion process, due to the characteristic of material itself, part electric energy is converted to interior energy storage, and rest part passes through
The mode of heat transmitting is transmitted outward.In heat transfer process, there are two types of main modes: first, when heating, film surface temperature
It increases, and will transmit heat in air, then form one in air and flowed due to caused by the difference of own temperature,
Referred to as free convection is the major way of traditional material heat transmitting.The generation wavelength second, carbon material can also be excited in the electric field
In 8-14 μm of electromagnetic wave, i.e. far infrared, energy is transmitted by way of heat radiation.Heat radiation belongs to electricity as visible light
Magnetic wave, the interaction with object also include absorbing, reflecting and penetrate.For solid and liquid, the absorption and reflection of radiation
Occur not being related to the inside of object in body surface.Therefore influence of the surface situation of object to these radiation characteristics is to pass
Important.And for gas, the absorption of radiation and penetrate, is carried out in entire gas volume.In addition, far infrared has pole
Strong penetrates effect, can pass through plastics, glass and ceramic, but the object that can be had polar molecule as water
It absorbs.Due to electric heating conversion process and these characteristics of heat transfer process, especially far infrared penetrate and absorption characteristic, make
Obtain the Electrothermal Properties difficulty of test multiplication of material.In addition, having special optical detection apparatus at present to detect new electrically heating material
The wavelength of the far infrared electromagnetic generated in material diabatic process, but this method only can know that the wave-length coverage and phase of the electromagnetic wave of radiation
To intensity, measurement result accuracy is low, poor reliability, cannot obtain accounting of the far infrared radiation in diabatic process, can not
Simulate different working environments.
Utility model content
In view of above-mentioned analysis, the utility model is intended to provide a kind of for graphene film thermo electric material Electrothermal Properties
Measuring device, to solve the problems, such as that existing measuring device is difficult to precise measurement radiant heat transfer accounting.
The purpose of this utility model is mainly achieved through the following technical solutions:
It is a kind of measure graphene film thermo electric material Electrothermal Properties device, including electric control system, test macro and
Data collection and processing system；For exporting constant current or constant voltage, film layer sample is uniformly provided with more electric control system
Group thermocouple；Test macro is used to obtain the electric current, voltage and temperature information of graphene film layer sample, and test macro includes electricity
Thermal characteristics thermometric room, Electrothermal Properties thermometric room are equipped with thermocouple；Data collection and processing system is for collecting test macro acquisition
Electric current, voltage and temperature information and handled, obtain the Electrothermal Properties data of graphene film thermo electric material.
Further, the outer surface of Electrothermal Properties thermometric room is equipped with the insulation of isolation Electrothermal Properties thermometric indoor and outdoor heat exchange
Material layer.
Further, the inner surface of insulation material layer is equipped with heat radiation reflectance coating, and film layer is tried when preventing test
The heat radiation that sample generates is transmitted outward.
Further, heat radiation reflectance coating is silver coating.
Further, Electrothermal Properties thermometric room includes top surface, side and bottom surface, and film layer sample is set to bottom surface.
Further, one group of thermocouple, film are equipped in top surface, side, bottom surface and space away from bottom surface certain distance
Layer sample is uniformly provided with four groups of thermocouples.
Further, data collection and processing system includes temperature polling instrument and control and processing unit, temperature polling instrument
For recording the real time temperature of electroheat pair, control is used for real-time display electric current, voltage, temperature information with processing unit.
Further, temperature polling instrument is connect with thermocouple, and temperature polling instrument can record the temperature measuring point of thermocouple simultaneously
Real time temperature.
Further, film layer sample is equipped with heated object, and heated object is Electrothermal Properties thermometric room air or liquid
State fluid.
Further, electric control system and data collection and processing system are respectively equipped with ammeter and voltmeter.
Compared with prior art, the utility model one of at least has the advantages that:
A) measuring device provided by the utility model for graphene film thermo electric material Electrothermal Properties, Electrothermal Properties are surveyed
Greenhouse outer surface is equipped with the insulation material layer of the heat exchange of isolation Electrothermal Properties thermometric indoor and outdoor, the interior table of the insulation material layer
Face is equipped with heat radiation reflectance coating, and the Electrothermal Properties thermometric room of this structure can not only completely cut off Electrothermal Properties and survey inside and outside greenhouse space
Thermal convection, and reduce the external transmitting of heat radiation that film layer sample generates during heating to the maximum extent, accurately
The radiant heat transfer accounting in diabatic process is measured, simple and quick, test result is more accurate, reliable.
B) measuring device provided by the utility model for graphene film thermo electric material Electrothermal Properties, can be by adjusting
The material of Electrothermal Properties thermometric room forms and the material of heated object, more accurate measurement graphene film thermo electric material exist
The Electrothermal Properties that different working environments is shown, it is with a wide range of applications, and patrolled by the arrangement and temperature of thermocouple
Examine the record and control and the temperature change of processing unit real-time monitoring different location of instrument, it is simple, quick, accurately measure spoke
Heat transfer accounting is penetrated, and then by comparing voltage, electric current, initial heating rate, heating-up time, average heating rate, electric heating conversion
Efficiency integrates the Electrothermal Properties parameters such as coefficient of heat transfer, radiant heat transfer accounting to evaluate the quality of material electric heating performance.
It in the utility model, can also be combined with each other between above-mentioned each technical solution, to realize more preferably combination sides
Case.Other feature and advantage of the utility model will illustrate in the following description, also, certain advantages can be from specification
It becomes apparent, or is understood and implementing the utility model.The purpose of this utility model and other advantages can pass through
It is achieved and obtained in specifically noted content in bright book, claims and attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not considered as limitations of the present invention, entire
In attached drawing, identical reference symbol indicates identical component.
Fig. 1 is the structural schematic diagram of the measurement graphene film thermo electric material Electrothermal Properties device in embodiment；
Fig. 2 is the arrangement schematic diagram of thermocouple and graphene thin layer specimen in Electrothermal Properties thermometric room in embodiment；
Fig. 3 is the arrangement schematic diagram of thermocouple on graphene film layer sample in embodiment.
Appended drawing reference:
1- electric control system；2- test macro, 21- Electrothermal Properties thermometric room；The top surface 22-；The side 23-；The bottom surface 24-；
25- film layer sample；26- thermocouple；27- first interface；28- second interface；3- data collection and processing system.
Specific embodiment
Specifically describe the preferred embodiment of the utility model with reference to the accompanying drawing, wherein attached drawing constitutes the application one
Point, and be used to illustrate the principles of the present invention together with the embodiments of the present invention, it is not intended to limit the utility model
Range.
One specific embodiment of the utility model discloses a kind of for graphene film electricity as shown in Figure 1 to Figure 3
The measuring device of hot material Electrothermal Properties, including electric control system 1, test macro 2 and data collection and processing system 3, electricity
Gas control system 1 is for exporting constant current or constant voltage；Graphene film layer sample 25 when test macro 2 is for obtaining experiment
Electric current, voltage and the temperature information of (hereinafter referred to as " film layer sample 25 "), test macro 2 include Electrothermal Properties thermometric room 21,
Electrothermal Properties thermometric room 21 is equipped with thermocouple 26, and film layer sample is uniformly provided with multiple groups thermocouple 26；Data collection and processing system
System 3 obtains graphene film electric heating material for collecting electric current, voltage and the temperature information of the acquisition of test macro 2 and being handled
The Electrothermal Properties data of material.
In the present embodiment, electric control system 1 can adjust output mode, realize Constant current output or constant voltage output,
The precision for exporting electric current reaches 1mA, and the precision of output voltage reaches 1mV.Data collection and processing system 3 includes temperature polling instrument and control
System and processing unit, temperature polling instrument are connect with thermocouple 26, and temperature polling instrument is used to record the real time temperature of thermocouple 26, control
System is used for real-time display electric current, voltage, temperature information with processing unit.Temperature polling instrument can record the survey of thermocouple 26 simultaneously
The real time temperature of warm spot, it is preferable that temperature polling instrument is able to record the real time temperature of 1 to 16 thermocouple, 26 temperature measuring point.Electrically
Control system 1 and data collection and processing system 3 are respectively equipped with ammeter and voltmeter, and illustratively, control system is equipped with electricity
Flow table A1With voltmeter V1, current value or voltage value are preset, control system exports stable current or voltage, data collection
Ammeter A is equipped with processing system 32With voltmeter V2If presetting ammeter A1For fixed value, then voltmeter V2Measurement is real
The voltage change of graphene film thermo electric material when testing, if presetting voltmeter V1For fixed value, then ammeter A2Measurement experiment
When graphene film thermo electric material curent change.
In the present embodiment, the selection of 21 material of Electrothermal Properties thermometric room and the arrangement of arrangement, thermocouple 26 are that this is practical new
One of main innovation point of type, wherein the selection of 21 material of Electrothermal Properties thermometric room and be arranged in consideration being capable of precise measurement stone
Consider that economical and practicability, thermocouple 26 are then according to follow-up data under the premise of the Electrothermal Properties of black alkene film thermo electric material
The demand of processing is selected and is arranged.
Electrothermal Properties thermometric room 21 includes top surface 22, side 23 and bottom surface 24, and grapheme material to be tested is placed in electricity
The bottom surface 24 of thermal characteristics thermometric room 21 forms film layer sample 25.It is special that the outer surface of Electrothermal Properties thermometric room 21 is equipped with isolation electric heating
Property thermometric indoor and outdoor heat exchange insulation material layer, the inner surface of insulation material layer is equipped with heat radiation reflectance coating.It is selected in material
It selects, insulation material layer is preferably loose fiber or foam porous material, such as polystyrene plastics foam, plasticized polyurethane parison
Foam, or powder particle heat-insulating material can also be multi-layer vacuum thermal insulation board；Heat radiation reflecting material can for gold,
The paillon or coating of silver, nickel, aluminium etc.；In arrangement, insulation material layer is arranged in outer surface, and inner surface is arranged heat radiation and reflects
Layer, heat insulation layer can be one layer or multilayer, and heat radiation reflecting layer is one layer, it is preferred that two layers of heat-insulating material and one layer of hot spoke
Reflecting material is penetrated, the heat-insulating material of outer layer is polystyrene plastics foam, and the heat-insulating material of internal layer is plasticized polyurethane strand foam, heat
Radiation reflecting layer is silver coating.The insulation of heat exchange inside and outside the setting isolation Electrothermal Properties thermometric room 21 of Electrothermal Properties thermometric room 21
Material layer and heat radiation reflectance coating can prevent the heat radiation that film layer sample 25 generates when test from transmitting outward, test knot
Fruit is more accurate and reliable.
It is equipped in the top surface 22 of Electrothermal Properties thermometric room 21, side 23, bottom surface 24 and space away from bottom surface certain distance
One group of thermocouple 26, film layer sample 25 are uniformly provided with four groups of thermocouples 26, and film layer sample 25 is equipped with the electricity with control system
The first interface 27 and second interface 28 of road connection, test electric current enter from first interface 27, flow out from second interface 28, such as scheme
Shown in 2, the size of film layer sample 25 to be measured can be adjusted according to requirement of experiment, is set in Electrothermal Properties thermometric room 21 position
Set and the quantity of thermocouple 26 and setting position.In the selection of thermocouple 26, it can choose K-type, T-type, J-type, the heat such as E type
K-type thermocouple is used in this embodiment in galvanic couple, and the arrangement of thermocouple 26 selects quantity and position according to testing requirement, just
Beginning heating rate, heating-up time, average heating rate use in film layer sample and space away from bottom surface certain distance totally five groups
The data of thermocouple, and integrate coefficient of heat transfer, electric heating conversion efficiency, radiant heat transfer accounting and then need to use whole thermocouples 26
Temperature data.It can be according to the thermocouple of testing requirement arranging section or whole.
Film layer sample 25 is equipped with heated object, and heated object is air or liquid stream in Electrothermal Properties thermometric room 21
Body.Air in the cavity of Electrothermal Properties thermometric room 21 is one of heated object, in measurement graphene film thermo electric material
Electrothermal Properties when, select the empty chamber air of Electrothermal Properties thermometric room 21 as heated object；And working environment is being simulated,
Whens such as heating the waist of human body, knee etc., according to different test conditions, different heated objects, such as selection liquid are selected
Fluid is as heated object, such as pure water, physiological saline etc..
Measuring device provided in this embodiment for graphene film thermo electric material Electrothermal Properties, test object include but
The film for not limiting the preparation of graphene film material, as other carbon materials preparations with far infrared radiation feature can be measured
Film also can measure the film of other traditional thermo electric material preparations.
When implementation, Electrothermal Properties thermometric room 21 is arranged according to requirement of experiment, and select heated object；Graphene electric heating is thin
Film layer sample 25 is put into Electrothermal Properties thermometric room 21, and is selected the quantity of thermocouple 26 and arranged as required；Connect exchange
Electricity, sets the mode and parameter value of input, adjusts input pattern control assembly and input value adjusts component, setting input pattern and
Input parameter；Connection circuit starts experiment test；Disconnecting circuit after the heating stipulated time cools down the stipulated time, when record is tested
Electric current, voltage and each thermocouple 26 temperature data, after experiment, export the electricity of film layer sample 25 in experimentation
Simultaneously the heating-up time is calculated in pressure, electric current, temperature measuring point temperature versus time curve, comprehensive coefficient of heat transfer, electric thermal conversion efficiency
Rate, radiant heat transfer accounting and the electric heating such as initial heating rate and average heating rate parameter and with the superiority and inferiority of this comparison material.
Wherein, there are two types of input patterns, a kind of is that control system exports DC stabilization electric current, and another kind is that control system output direct current is steady
Constant voltage, correspondingly, data collection and processing system 3 obtains the voltage change or curent change situation of film layer sample 25.
In the present embodiment, Electrothermal Properties data include initial heating rate, the heating-up time, average heating rate, comprehensive dissipate
Hot coefficient, electric heating conversion efficiency and radiant heat transfer accounting, for different Electrothermal Properties data, processing method also phase not to the utmost
Together, two methods of curve matching, mounted castization calculating are mainly used, specifically: initial heating rate, is averaged at the heating-up time
Heating rate is matched curve to be obtained by the method for nonlinear fitting, and calculate according to its physical significance and experiment demand
It arrives, wherein the heating-up time can be used " GB/T 7287-2008 infrared radiation heater test method ", and initial heating rate is put down
Equal heating rate is according to experiment demand and its physical significance self-defining.Comprehensive coefficient of heat transfer be according to its physical significance, according to
Newtonian Cooling formula linear fit obtains.Electric heating conversion efficiency, radiant heat transfer accounting are by the way that Electrothermal Properties are surveyed Greenhouse model
Change, it can be according to " thermal conduction study " (Beijing Yang Shiming, inscription on pottery select thermal conduction study (fourth edition) [M]: Higher Education Publishing House, 2006.)
In the calculation method in relation to convection current and radiant heat transfer obtain.
Compared with prior art, the measurement provided in this embodiment for graphene film thermo electric material Electrothermal Properties fills
It sets, 21 outer surface of Electrothermal Properties thermometric room is equipped with the insulation material layer of the heat exchange inside and outside isolation Electrothermal Properties thermometric room 21, absolutely
The inner surface of hot material layer is equipped with heat radiation reflectance coating, and the Electrothermal Properties thermometric room 21 of this structure can not only completely cut off electric heating spy
Property 21 space of thermometric room inside and outside thermal convection, and reduce the heat that generates during heating of film layer sample 25 to the maximum extent
The external transmitting of radiation, the radiant heat transfer accounting in precise measurement diabatic process, simple and quick, test result is more smart
Really, reliably.In addition, can be more accurate by adjusting the material of the material of Electrothermal Properties thermometric room 21 composition and heated object
The Electrothermal Properties that are shown in different working environments of measurement graphene film thermo electric material, it is with a wide range of applications,
And pass through the arrangement of thermocouple 26 and the record of temperature polling instrument and the temperature of control and processing unit real-time monitoring different location
Spend variation, simple, quick, accurately measurement radiant heat transfer accounting, and then voltage by comparing, electric current, initial heating rate, liter
Warm time, average heating rate, electric heating conversion efficiency integrate the Electrothermal Properties parameters such as coefficient of heat transfer, radiant heat transfer accounting to comment
The quality of valence material electric heating performance.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Change or replacement, should be covered within the scope of the utility model.
Claims (10)
1. a kind of measuring device for graphene film thermo electric material Electrothermal Properties, which is characterized in that including electrical control system
System, test macro and data collection and processing system；
The electric control system is for exporting constant current or constant voltage；
The test macro is used to obtain the electric current, voltage and temperature information of graphene film layer sample, the test macro packet
Electrothermal Properties thermometric room is included, Electrothermal Properties thermometric room is equipped with thermocouple, and the film layer sample is uniformly provided with multiple groups thermoelectricity
It is even；
The data collection and processing system is used to collect electric current, voltage and the temperature information that the test macro obtains and carries out
Processing, obtains the Electrothermal Properties data of graphene film thermo electric material.
2. the measuring device according to claim 1 for graphene film thermo electric material Electrothermal Properties, which is characterized in that
The outer surface of Electrothermal Properties thermometric room is equipped with the insulation material layer of isolation Electrothermal Properties thermometric indoor and outdoor heat exchange.
3. the measuring device according to claim 2 for graphene film thermo electric material Electrothermal Properties, which is characterized in that
The inner surface of the insulation material layer is equipped with heat radiation reflectance coating, the heat radiation that film layer sample generates when preventing test
Transmitting outward.
4. the measuring device according to claim 3 for graphene film thermo electric material Electrothermal Properties, which is characterized in that
The heat radiation reflectance coating is silver coating.
5. the measuring device according to claim 1 for graphene film thermo electric material Electrothermal Properties, which is characterized in that
Electrothermal Properties thermometric room includes top surface, side and bottom surface, and film layer sample is set to the bottom surface.
6. the measuring device according to claim 5 for graphene film thermo electric material Electrothermal Properties, which is characterized in that
It is equipped with one group of thermocouple in the top surface, side, bottom surface and space away from bottom surface certain distance, the film layer sample is uniform
Equipped with four groups of thermocouples.
7. the measuring device according to claim 1 for graphene film thermo electric material Electrothermal Properties, which is characterized in that
The data collection and processing system includes temperature polling instrument and control and processing unit, and the temperature polling instrument is for recording institute
The real time temperature of electroheat pair is stated, the control is used for real-time display electric current, voltage, temperature information with processing unit.
8. the measuring device according to claim 7 for graphene film thermo electric material Electrothermal Properties, which is characterized in that
The temperature polling instrument is connect with the thermocouple, and the temperature polling instrument can record the temperature measuring point of the thermocouple simultaneously
Real time temperature.
9. according to the described in any item measuring devices for graphene film thermo electric material Electrothermal Properties of claim 2 to 8,
It is characterized in that, the film layer sample is equipped with heated object, and the heated object is Electrothermal Properties thermometric room air or liquid
State fluid.
10. the measuring device according to claim 1 for graphene film thermo electric material Electrothermal Properties, feature exist
In the electric control system and the data collection and processing system are respectively equipped with ammeter and voltmeter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687358A (en) * | 2019-10-14 | 2020-01-14 | 云南师范大学 | Capacitive electromagnetic wave detector and system based on thermoelectric material |
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- 2019-01-03 CN CN201920007404.1U patent/CN209446505U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687358A (en) * | 2019-10-14 | 2020-01-14 | 云南师范大学 | Capacitive electromagnetic wave detector and system based on thermoelectric material |
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