CN103901071B - A kind of method testing membranaceous thermoelectric material Seebeck coefficient and test device thereof - Google Patents
A kind of method testing membranaceous thermoelectric material Seebeck coefficient and test device thereof Download PDFInfo
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Abstract
A kind of method testing membranaceous thermoelectric material Seebeck coefficient and test device thereof, relate to being specially adapted for the thermoelectric semiconductor device of detection or the method for its parts or equipment, particularly relate to a kind of method and apparatus for testing membranaceous thermoelectric semiconductor material Seebeck coefficient, including test lead module, the test device of heating module and data acquisition module, tabilized current power supply is used to control strip ceramic heating flake, control the temperature difference at sample to be tested two ends, the configuration of test lead module becomes the wire electrode of linear contact lay with sample to be tested along isopotential line direction, thermoelectromotive force signal is gathered by wire electrode, computer is sent to after being converted to digital signal by data acquisition module.The method of the present invention can preferably avoid the measurement error that edge of materials effect and sampled point loose contact cause, distance and the position of strip ceramic heating flake of wire form electrode can be set according to the specification of sample to be tested, solve the problem that existing test module cannot carry out testing for the sample of different specification size.
Description
Technical field
The present invention relates to be specially adapted for the thermoelectric semiconductor device of detection or the method for its parts or equipment, particularly relate to one
Plant the method and apparatus for testing membranaceous thermoelectric semiconductor material Seebeck coefficient.
Background technology
1821, Germany scientist Seebeck (Seebeck) found, when two kinds of different metal line two ends are linked together,
If a contact being placed in condition of high temperature T2 (high temperature), and another contact being placed in low temperature state T1 (cold end), then at two ends it
Between there is Electromotive Difference Of Potential Δ V, this phenomenon is referred to as Seebeck effect, and Δ V is directly proportional, i.e. to the temperature difference Δ T at cold and hot two ends
Δ V=S Δ T, wherein S is referred to as Seebeck coefficient.
Seebeck coefficient is one of of paramount importance performance parameter of thermoelectric material, accurately measures its material different for further investigation
Expect thermoelectricity capability, and then further investigation and exploitation novel semi-conductor thermoelectric material device have important using value and theory
Meaning.At present, countries in the world have developed the device of some test semi-conductor thermoelectric material Seebeck coefficients, such as Japan
ZEM series Seebeck coefficient measuring device, Germany's Lin Saisi Seebeck/ Resistance Analysis system etc..But these test dress
Put some problems that still suffer from: 1, test device is huge, and structure is complicated, and cost is high, and process is complicated, causes testing expense
Expensive.2, test device is mainly for block thermoelectric material, higher for sample to be tested specification requirement, it is impossible to membranaceous heat
Electric material is tested.
Compared with block thermoelectric material test, the test of membranaceous thermoelectric material has due to the reason that sample to be tested is relatively thin
Special place.First, the electrode gathering electromotive force signal is often difficult to sufficiently contact with sample to be tested, loose contact
The error measured can be caused to produce；Secondly, existing electrode and sample to be tested connected mode substantially divide two classes, and a class is for adopting
With conductive silver paste, electrode is bonded with sample to be tested, but often due to conductive silver paste heatproof is limited, it is impossible at higher temperature bar
Measure under part, and sample to be tested cannot reclaim.Electrode and sample to be tested are clamped by Equations of The Second Kind for using fixture, it is achieved
Electrode preferably contacts with sample to be tested.Chinese invention patent application " thin film thermoelectricity material Seebeck coefficient test system
And method " (application for a patent for invention number: 200810153534.2 publication numbers: CN101413908A) disclose a kind of thin film temperature
Difference electric material Seebeck coefficient test system and method, including testing device and control and test Circuits System；Sample to be tested
Be held in place on the insulating trip on sample to be tested bracing frame, and by the fixing card of sample to be tested respectively with two samples to be tested
Temperature thermocouple is in close contact；The temperature difference is set up in the inside of sample to be tested by being positioned at the electrical heating block of sample to be tested side,
And two sample to be tested temperature thermocouples spaced apart record the temperature of thin-film thermoelectric material at position along temperature difference direction
Degree, surveys by means respectively of the Seebeck electromotive force drawn by each wire in the two sample to be tested temperature thermocouple
Amount line, records the Seebeck that sample to be tested produces inside thin-film thermoelectric material at the two temperature thermocouple position
Electromotive force；This invention can measure the Seebeck coefficient of thin-film thermoelectric material rapidly and accurately, solves current thin film temperature
The problem that difference electric material Seebeck coefficient cannot be measured.But, this invention blocks electrode with to be measured by sample to be tested is fixing
Sample is clamped, and forms point cantact, on the one hand easily causes the damage to sample to be tested, on the other hand because of the position of contact point
Different introducing measurement error, cause measurement reproducibility poor.
Summary of the invention
It is an object of the invention to provide a kind of can the temperature difference on the temperature at precise acquisition sample to be tested two ends and correspondence position thereof
Electromotive force, thus the method accurately testing membranaceous thermoelectric material Seebeck coefficient, solve edge of materials effect and sampling electricity
Pole and membranaceous thermoelectric material loose contact and the excessive problem of the test error that brings.
The present invention solves above-mentioned technical problem and be the technical scheme is that
A kind of method testing membranaceous thermoelectric material Seebeck coefficient, making to computerized control a set of includes test lead module,
The test device of heating module and data acquisition module, obtains temperature and the thermoelectromotive force of membranaceous thermoelectric material sample to be tested
Signal, it is characterised in that:
Described heating module uses strip ceramic heating flake to apply heat to the temperature end of sample to be tested, makes sample to be tested long
The homogeneous temperature in degree direction, makes the temperature difference between the temperature end of sample to be tested and low-temperature end, the thermoelectromotive force inspired,
Isopotential line is formed along the length direction being parallel to sample to be tested；
Described heating module uses tabilized current power supply to control the supply current of strip ceramic heating flake, controls sample to be tested two
The temperature difference of end, makes the temperature distribution gradient along sample to be tested width；
Described test lead module configuration and sample to be tested become the wire electrode of linear contact lay along isopotential line direction, by thread electricity
Pole gathers sample to be tested temperature end and the thermoelectromotive force signal of low-temperature end, is converted to digital signal by data acquisition module
After send computer to.
It is a further object to provide a kind of survey using above-mentioned test device membranaceous thermoelectric material Seebeck coefficient
Electricity testing device, solves existing test device easily because sample electrodes causes measurement error big with membranaceous thermoelectric material loose contact
Problem.
The present invention solves above-mentioned technical problem and be the technical scheme is that
A kind of membranaceous thermoelectric material Seebeck coefficient testing device using above-mentioned method of testing, including test lead module,
Heating module and data acquisition module；Described data acquisition module passes through test lead module, is connected to be coated with membranaceous heat
The sample to be tested of electric material, obtains temperature and the thermoelectromotive force analog signals of sample to be tested, and is converted into numeral
Signal, sends computer to and performs Seebeck coefficient calculations, it is characterised in that:
Described heating module includes tabilized current power supply and is connected to the strip ceramic heating flake of tabilized current power supply；Described strip
Ceramic heating flake is in close contact with one end of described sample to be tested, uniformly heats to the length direction of sample to be tested, and composition is treated
The temperature end of test specimens；The other end of described sample to be tested constitutes the low-temperature end of sample to be tested；
Described test lead module includes insulating body, temperature end wire electrode, low-temperature end wire electrode, temperature end thermoelectricity
Even summation low-temperature end thermocouple；
Described temperature end wire electrode and low-temperature end wire electrode are placed on insulating body along interval, temperature difference direction, respectively with treat
Temperature end and the low-temperature end of test specimens are fully contacted, connecing of sample to be tested and temperature end wire electrode and low-temperature end wire electrode
Touch line, be respectively parallel to the isopotential line of sample to be tested thermoelectromotive force；The temperature difference of sample to be tested temperature end and low-temperature end is electronic
Gesture is sent to described data acquisition module by temperature end wire electrode and low-temperature end wire electrode；
Described temperature end thermocouple and low-temperature end thermocouple are respectively placed in temperature end and the low-temperature end of sample to be tested, temperature end heat
The thermometric output signal of galvanic couple and low-temperature end thermocouple is sent to described data acquisition module.
The one preferably technical scheme of the membranaceous thermoelectric material Seebeck coefficient testing device of the present invention, it is characterised in that
Described insulating body is made up of matrix potsherd, the first potsherd and the second potsherd；First potsherd and the second pottery
Sheet is bonded on matrix potsherd, and between the first potsherd and the second potsherd, reserved one is perpendicular to the long limit side of insulating body
To conduit；First potsherd and the thickness of the second potsherd and the width of described conduit, with temperature end thermocouple and low temperature
The diameter of end thermocouple is consistent, and described temperature end thermocouple and low-temperature end thermocouple are placed in described conduit, its temperature-sensitive end
Position aligns temperature end wire electrode and low-temperature end wire electrode respectively；Described temperature end wire electrode and low-temperature end are thread
Electrode is that the two root length degree plain conductors more than sample to be tested length, temperature end wire electrode and low-temperature end wire electrode are along absolutely
The long side direction of edge matrix is arranged in parallel, and fits tightly on the first potsherd and the second potsherd；The following table of sample to be tested
Face is fitted tightly on described temperature end wire electrode and low-temperature end wire electrode, the temperature end of sample to be tested and temperature end
Wire electrode is fully contacted, and the low-temperature end of sample to be tested is fully contacted with low-temperature end wire electrode；Described strip ceramic heat
Sheet is corresponding to the position of temperature end wire electrode, with the upper surface thermal conductive contact of sample to be tested temperature end.
A kind of superior technique scheme of the membranaceous thermoelectric material Seebeck coefficient testing device of the present invention, it is characterised in that
Described temperature end wire electrode and low-temperature end wire electrode, can be along being perpendicular on the first potsherd and the second potsherd
Insulating body long side direction translates, by adjusting the spacing between temperature end wire electrode and low-temperature end wire electrode, and
The position of strip ceramic heating flake, is adapted to the sample to be tested of different in width.
A kind of technical scheme of the improvement of the membranaceous thermoelectric material Seebeck coefficient testing device of the present invention, it is characterised in that
Described temperature end thermocouple and low-temperature end thermocouple are fixed on the both sides of the first potsherd respectively along insulating body long side direction
Edge, and bend in the conduit described in 90 degree of embeddings at described conduit.
The technical scheme of a kind of further improvement of the membranaceous thermoelectric material Seebeck coefficient testing device of the present invention, it is special
Levy and be that described test lead module and strip ceramic heating flake are placed in tubular heater, by controlling tubular heater
Temperature and be filled with the protective gas of tubular heater, described test device can at varying environment temperature and atmosphere protection,
Sample to be tested is carried out Seebeck coefficient test.
The invention has the beneficial effects as follows:
1. the method testing membranaceous thermoelectric material Seebeck coefficient of the present invention, uses wire form electrode to gather electric potential signal,
Make electrode form linear contact lay with sample (i.e. isopotential line direction) along its length, can preferably avoid edge of materials
The measurement error that effect and sampled point loose contact cause.Meanwhile, in the case of chucking pressure is identical, electrode and sample
Linear contact lay be less likely to cause the damage to sample than point cantact.
2. the membranaceous thermoelectric material Seebeck coefficient testing device of the present invention, has simple in construction, the advantage that motility is strong,
Distance and the position of strip ceramic heating flake of wire form electrode can be set according to the specification of different samples, solve existing survey
Die trial block many employings fixed electrode designs, it is impossible to the problem carrying out testing for the sample of different specification size.
Accompanying drawing explanation
Fig. 1 is the test lead modular structure schematic diagram of the present invention membranaceous thermoelectric material Seebeck coefficient testing device；
Fig. 2 is the overall structure schematic diagram of the present invention membranaceous thermoelectric material Seebeck coefficient testing device；
Fig. 3 is the Δ T-Δ V and linear fit result curve figure using the method for the present invention to record；
Fig. 4 is that the Seebeck coefficient of the sample to be tested using the method for the present invention to record varies with temperature curve chart.
In figure: 11-matrix potsherd, 12-the first potsherd, 13-the second potsherd, 20-conduit, 21-low-temperature end thermoelectricity
Even, 22-temperature end thermocouple, 31-low-temperature end wire electrode, 32-temperature end wire electrode, 4-sample to be tested, 5-strip
Ceramic heating flake, the supply lines of 6-strip ceramic heating flake, 100-test lead module, 200-heating module, 300-data
Acquisition module, 400-computer, 500-tubular heater, 600-protective gas.
Detailed description of the invention
For better understanding of the technique scheme of the present invention, carry out the most detailed with embodiment below in conjunction with the accompanying drawings
Thin description.
The method testing membranaceous thermoelectric material Seebeck coefficient of the present invention, uses computer 400 to control to survey a set of including
Examination end module 100, the test device of heating module 200 and data acquisition module 300, obtain membranaceous thermoelectric material to be tested
The temperature of sample and thermoelectromotive force signal.Heating module 200 uses strip ceramic heating flake 5 to the high temperature of sample to be tested 4
End applies heat, makes the homogeneous temperature of sample to be tested length direction, makes between temperature end and the low-temperature end of sample to be tested 4
The temperature difference, the thermoelectromotive force inspired, form isopotential line along the length direction being parallel to sample to be tested 4；
Described heating module 200 uses tabilized current power supply to control the supply current of strip ceramic heating flake 5, controls to be measured
The temperature difference at sample 4 two ends, makes the temperature distribution gradient along sample to be tested width；
Test lead module 100 configuration becomes two wire electrode (low temperature terminal filaments of linear contact lay with sample to be tested along isopotential line direction
Shape electrode 31 and temperature end wire electrode 32), gather sample to be tested 4 temperature end and the temperature difference of low-temperature end by wire electrode
Electromotive force signal, sends computer 400 to after being converted to digital signal by data acquisition module 300.
One embodiment of the present invention membranaceous thermoelectric material Seebeck coefficient testing device as depicted in figs. 1 and 2, including
Test lead module 100, heating module 200 and data acquisition module 300；Data acquisition module 300 is by test lead module
100, it is connected to be coated with the sample to be tested 4 of membranaceous thermoelectric material, obtains temperature and the thermoelectromotive force mould of sample to be tested 4
Analog quantity signal, and it is converted into digital signal, send computer 400 to and perform Seebeck coefficient calculations.
Heating module 200 includes tabilized current power supply and is connected to tabilized current power supply by the supply lines 6 of strip ceramic heating flake
Strip ceramic heating flake 5；Strip ceramic heating flake 5 is in close contact, to sample to be tested 4 with one end of sample to be tested 4
Length direction uniformly heat, constitute sample to be tested 4 temperature end；The other end that sample to be tested 4 does not heats constitutes to be measured
The low-temperature end of sample 4；
Test lead module 100 includes the insulating body of three piece aluminum oxide potsherd 11,12 and 13 compositions, and temperature end is thread
Electrode 32, low-temperature end wire electrode 31, temperature end thermocouple 22 and low-temperature end thermocouple 21；
Temperature end wire electrode 32 and low-temperature end wire electrode 31 are placed on insulating body along interval, temperature difference direction, respectively with
Temperature end and the low-temperature end of sample to be tested 4 are fully contacted, and sample to be tested 4 is thread with temperature end wire electrode 32 and low-temperature end
The contact line of electrode 31, is respectively parallel to the isopotential line of sample to be tested 4 thermoelectromotive force；Sample to be tested 4 temperature end and low
The thermoelectromotive force of Wen Duan is sent to described data acquisition by temperature end wire electrode 32 and low-temperature end wire electrode 31
Module 300；
Temperature end thermocouple 22 and low-temperature end thermocouple 21 are respectively placed in temperature end and the low-temperature end of sample to be tested 4, high temperature
The thermometric output signal of end thermocouple 22 and low-temperature end thermocouple 21 is sent to data acquisition module 300.
Fig. 1 is an enforcement of the test lead module 100 of the membranaceous thermoelectric material Seebeck coefficient testing device of the present invention
Example, in order to more clearly represent the structure of test lead module 100, makes in Fig. 1 sample to be tested 4 and strip are represented by dashed line
Ceramic heating flake 5.As it is shown in figure 1, insulating body is by matrix potsherd the 11, first potsherd 12 and the second potsherd 13
Constitute；First potsherd 12 and the second potsherd 13 are bonded on matrix potsherd 11, the first potsherd 12 and second
A reserved conduit 20 being perpendicular to insulating body long side direction between potsherd 13；First potsherd 12 and the second pottery
The thickness of sheet 13 and the width of conduit 20, consistent with the diameter of temperature end thermocouple 22 and low-temperature end thermocouple 21, high
The temperature-sensitive end of temperature end thermocouple 22 and low-temperature end thermocouple 21 is placed in conduit 20, and the position of its temperature-sensitive end aligns height respectively
Temperature end wire electrode 32 and low-temperature end wire electrode 31；Temperature end wire electrode 32 and low-temperature end wire electrode 31 are two
Length is more than the plain conductor of sample to be tested 4 length, and temperature end wire electrode 32 and low-temperature end wire electrode 31 are along insulation
The long side direction of matrix is arranged in parallel, and fits tightly on the first potsherd 12 and the second potsherd 13；Sample to be tested 4
Lower surface be fitted tightly on temperature end wire electrode 32 and low-temperature end wire electrode 31, the temperature end of sample to be tested 4
Being fully contacted with temperature end wire electrode 32, the low-temperature end of sample to be tested 4 is fully contacted with low-temperature end wire electrode 31；
Strip ceramic heating flake 5 is corresponding to the position of temperature end wire electrode 32, with the upper surface heat conduction of sample to be tested 4 temperature end
Contact.
Temperature end wire electrode 32 and low-temperature end wire electrode 31 can use fine silver wire or gold-plated or silver-plated copper wire.
Strip ceramic heating flake 5 is connected to tabilized current power supply by the supply lines 6 of strip ceramic heating flake, high to sample to be tested 4
The length direction of Wen Duan is uniformly heated.Temperature difference T, temperature end heat is produced between the temperature end and low-temperature end of sample to be tested 4
The temperature-sensitive end of galvanic couple 22 and low-temperature end thermocouple 21 aligns temperature end wire electrode 32 and low-temperature end wire electrode 31 respectively
Position, in Real-time Collection sample to be tested 4 temperature end temperature T2With low-temperature end temperature T1While, temperature end wire electrode
32 and low-temperature end wire electrode 31 respectively Real-time Collection correspondence position on temperature end electromotive force V2With low-temperature end electromotive force
V1, sending computer 400 after being converted to digital signal by data acquisition module 300 to, computer 400 just can root
According to Seebeck coefficient formula S=(V2-V1)/(T2-T1), calculate instantaneous under a certain ambient temperature of sample to be tested 4
Seebeck coefficient value S.
According to the embodiment of the test lead module 100 shown in Fig. 1, temperature end wire electrode 32 and low-temperature end wire electrode 31,
Can be along being perpendicular to the translation of insulating body long side direction on the first potsherd 12 and the second potsherd 13, by adjusting height
Spacing between temperature end wire electrode 32 and low-temperature end wire electrode 31, and the position of strip ceramic heating flake 5, can
To adapt to the sample to be tested 4 of different in width.
According to the embodiment of the test lead module 100 shown in Fig. 1, temperature end thermocouple 22 and low-temperature end thermocouple 21 points
It is not fixed on the both sides of the edge of the first potsherd 12 along insulating body long side direction, and bending 90 degree is embedding at conduit 20
Enter in conduit 20.
The embodiment of the membranaceous thermoelectric material Seebeck coefficient testing device according to the present invention shown in Fig. 2, test lead mould
Block 100 and strip ceramic heating flake 5 are placed in tubular heater 500, by control tubular heater 500 temperature and
Be filled with the protective gas 600 of tubular heater, the test device of the present invention can at varying environment temperature and atmosphere protection,
Sample to be tested 4 is carried out Seebeck coefficient test.
Embodiment
Sample to be tested is to utilize method for printing screen to be prepared in 25mm*25mm*1mm aluminium oxide ceramics sheet surface
Bi0.5Sb1.5Te3Thick-film material, its thicknesses of layers is 30 μm.Sample to be tested is fixed in test lead module 100, puts
In tubular heater 500, it is passed through nitrogen protection, the tubular heater 500 speed with 5 DEG C/min is set, by room temperature
It is warming up to 200 DEG C.Room temperature, 50 DEG C, 75 DEG C, 100 DEG C, 125 DEG C, 150 DEG C, 175 DEG C, 200 DEG C respectively to be measured
The Seebeck coefficient of sample 4 is tested.
Concrete test process is, when observing test temperature needed for furnace temperature rises to, starts to add to the strip pottery in test device
Backing 5 is passed through electric current, and in this example, we use the electric current of 0.4A.By data acquisition module 300, read and remember
Temperature end temperature T of the sample to be tested 4 that record temperature end thermocouple 22 and low-temperature end thermocouple 21 collect2With low-temperature end temperature
Degree T1, and the corresponding temperature end electromotive force that temperature end wire electrode 32 and low-temperature end wire electrode 31 Real-time Collection arrive
V2With low-temperature end electromotive force V1.Data acquiring frequency is 2 times per second, observes sample to be tested 4 two ends temperature difference and reaches 7 DEG C
During left and right, stop input current and data record.In time arriving next test temperature, repeat above testing process.
Test process under each of the above ambient temperature can collect 4 serial parameters, low-temperature end temperature T1, low temperature
End electromotive force V1, temperature end temperature T2, temperature end electromotive force V2.Utilize data processing software, with (T2-T1) value is horizontal seat
Mark, (V2-V1) value be vertical coordinate mapping, obtain curve as shown in Figure 3, the linear fit slope of curve is a certain survey
The Seebeck coefficient of this sample to be tested at a temperature of examination.With test temperature as abscissa, the Seebeck recorded at each temperature
Coefficient value is vertical coordinate, can make Seebeck value situation of change figure at a temperature of this sample to be tested varying environment, such as Fig. 4 institute
Show.This result show obtained by Bi0.5Sb1.5Te3Thick film coating is between room temperature to 200 DEG C temperature, and Seebeck coefficient first increases
Reducing after big, absolute value is between 200 μ V/ DEG C to 300 μ V/ DEG C.
Those of ordinary skill in the art is it should be appreciated that above embodiment is intended merely to illustrate the skill of the present invention
Art scheme, and it is not used as limitation of the invention, any connotation based on the present invention is to embodiment described above
The change made, modification, all will fall in the scope of the claims of the present invention.
Claims (6)
1. the method testing membranaceous thermoelectric material Seebeck coefficient, make to computerized control a set of include test lead module,
The test device of heating module and data acquisition module, obtains temperature and the thermoelectric of membranaceous thermoelectric material sample to be tested
Electromotive force signal, it is characterised in that:
Described heating module uses strip ceramic heating flake to apply heat to the temperature end of sample to be tested, makes sample to be tested long
The homogeneous temperature in degree direction, the temperature difference making the temperature difference between the temperature end of sample to be tested and low-temperature end inspire is electronic
Gesture, forms isopotential line along the length direction being parallel to sample to be tested；
Described heating module uses tabilized current power supply to control the supply current of strip ceramic heating flake, thus controls to be tested
The temperature difference at sample two ends, makes the temperature distribution gradient along sample to be tested width；
Described test lead module configuration and sample to be tested become the wire electrode of linear contact lay along isopotential line direction, by thread electricity
Pole gathers sample to be tested temperature end and the thermoelectromotive force signal of low-temperature end, is converted to numeral by data acquisition module
Computer is sent to after signal.
2. use the method testing device testing membranaceous thermoelectric material Seebeck coefficient described in claim 1, bag
Include test lead module, heating module and data acquisition module；Described data acquisition module is by test lead module even
Receive the sample to be tested being coated with membranaceous thermoelectric material, obtain temperature and the thermoelectromotive force simulation letter of sample to be tested
Number, and it is converted into digital signal, send computer to and perform Seebeck coefficient calculations, it is characterised in that:
Described heating module includes tabilized current power supply and is connected to the strip ceramic heating flake of tabilized current power supply；Described strip
Ceramic heating flake is in close contact with one end of described sample to be tested, uniformly heats to the length direction of sample to be tested, structure
Become the temperature end of sample to be tested；The other end of described sample to be tested constitutes the low-temperature end of sample to be tested；
Described test lead module includes insulating body, temperature end wire electrode, low-temperature end wire electrode, temperature end thermoelectricity
Even summation low-temperature end thermocouple；
Described temperature end wire electrode and low-temperature end wire electrode are placed on insulating body along interval, temperature difference direction, high temperature terminal filament
Shape electrode and low-temperature end wire electrode temperature end and low-temperature end with sample to be tested respectively is fully contacted, sample to be tested with
The contact line of temperature end wire electrode and low-temperature end wire electrode be respectively parallel to sample to be tested thermoelectromotive force etc.
Gesture line；The thermoelectromotive force of sample to be tested temperature end and low-temperature end passes through temperature end wire electrode and the thread electricity of low-temperature end
Pole is sent to described data acquisition module；
Described temperature end thermocouple and low-temperature end thermocouple are respectively placed in temperature end and the low-temperature end of sample to be tested, temperature end heat
The thermometric output signal of galvanic couple and low-temperature end thermocouple is sent to described data acquisition module.
Test device the most according to claim 2, it is characterised in that described insulating body by matrix potsherd, first
Potsherd and the second potsherd are constituted；First potsherd and the second potsherd are bonded on matrix potsherd, first
A reserved conduit being perpendicular to insulating body long side direction between potsherd and the second potsherd；First potsherd with
The thickness of the second potsherd and the width of described conduit, with the diameter one of temperature end thermocouple and low-temperature end thermocouple
Causing, described temperature end thermocouple and low-temperature end thermocouple are placed in described conduit, and the position of its temperature-sensitive end aligns respectively
Temperature end wire electrode and low-temperature end wire electrode；Described temperature end wire electrode and low-temperature end wire electrode are two
Root length degree is more than the plain conductor of sample to be tested length, temperature end wire electrode and low-temperature end wire electrode edge insulation base
The long side direction of body is arranged in parallel, and fits tightly on the first potsherd and the second potsherd；The following table of sample to be tested
Face is fitted tightly on described temperature end wire electrode and low-temperature end wire electrode, and the temperature end of sample to be tested is with high
Temperature end wire electrode is fully contacted, and the low-temperature end of sample to be tested is fully contacted with low-temperature end wire electrode；Described strip
Ceramic heating flake and the upper surface thermal conductive contact of sample to be tested temperature end.
Test device the most according to claim 3, it is characterised in that described temperature end wire electrode and low-temperature end are thread
Electrode, can be along being perpendicular to the translation of insulating body long side direction on the first potsherd and the second potsherd, by adjusting
Spacing between whole temperature end wire electrode and low-temperature end wire electrode and the position of strip ceramic heating flake, permissible
Adapt to the sample to be tested of different in width.
Test device the most according to claim 3, it is characterised in that described temperature end thermocouple and low-temperature end thermocouple
It is fixed on the both sides of the edge of the first potsherd respectively along insulating body long side direction, and at described conduit, bends 90
In conduit described in degree embedding.
6. according to the test device described in any claim of claim 2 to 5, it is characterised in that described test lead mould
Block and strip ceramic heating flake are placed in tubular heater, by controlling the temperature of tubular heater and being filled with tubular type and add
The protective gas of hot stove, sample to be tested can be entered at varying environment temperature and atmosphere protection by described test device
Row Seebeck coefficient is tested.
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| US9140612B2 (en) * | 2011-02-23 | 2015-09-22 | California Institute Of Technology | Measuring seebeck coefficient |
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