CN107219116A - The test system of ferroelectric material respondent behavior under the conditions of power electro thermal coupling - Google Patents
The test system of ferroelectric material respondent behavior under the conditions of power electro thermal coupling Download PDFInfo
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- CN107219116A CN107219116A CN201710489032.6A CN201710489032A CN107219116A CN 107219116 A CN107219116 A CN 107219116A CN 201710489032 A CN201710489032 A CN 201710489032A CN 107219116 A CN107219116 A CN 107219116A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/0208—Specific programs of loading, e.g. incremental loading or pre-loading
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a kind of test system of ferroelectric material respondent behavior under the conditions of power electro thermal coupling, including：Test flume, nonconducting flow model heat-conduction medium is filled in it, and test flume is used for placing sample；Power loading unit, for loading the controllable field of force to sample；Electric field loading unit, for loading controllable electric field to sample；Stress measurement unit, for measuring the stress data of sample generation；Strain measurement unit, for measuring the strain data of sample generation；Temperature control unit, for regulating and controlling the temperature of sample local environment；Data acquisition unit, for the temperature data of the electric field data, stress data, strain data and the electric field local environment that gather sample；Data processing unit, for handling the data that data acquisition unit is gathered, obtains the respondent behavior of sample.The present invention can individually load the field of force, electric field or load the field of force, electric field simultaneously, Fast synchronization measures respondent behavior of the sample under different prestressing force under condition of different temperatures.
Description
Technical field
The invention belongs to precision scientific instrument field, ferroelectric material is responded under more particularly to a kind of power-electric-thermal coupling condition
The test system of behavior.
Background technology
It is the advantages of function ceramics such as the ferroelectric ceramics stress-electric coupling property excellent due to possessing, small volume, fast response, wide
It is general to be used to make the intelligent component such as sensor, actuator, irreplaceable work is played in modern industry and national defense construction
With.With the popularization of its application, industrial production is to the functional parameter of ferroelectric material it is also proposed that higher requirement.For example, working as
Ferroelectric ceramics is used in Diesel engine atomizer when making actuator, it is desirable to which the output strain of material is in room temperature to 150 DEG C of temperature
There is good temperature stability in the range of degree；When ferroelectric ceramics is used to make sensor, it is desirable to which material has larger pressure
Electric constant and higher coercive stress.In recent decades, the need for meet new and high technology and national defense construction development, various countries are always
Pay attention to development, exploitation and the performance characterization of the functional materials such as high-performance iron electroceramics.
The functional materials such as piezoelectricity ferro material, electrostriction material be usually associated with use complexity power, electricity,
The complicated coupling physical behavior such as heat, studies its respondent behavior and fatigue properties, stress under electric field or stress and moves back pole
The mechanism for understanding material such as change and creep behaviour, optimization material property is extremely important.
Existing ferroelectric material test equipment it is typically only simple by various laboratory apparatus manual configurations together, install and
Remove automatic data collection cumbersome and that data can not be realized and storage.Generally measure sample using the mode of bonding foil gauge at present
The strain produced under prestress, the method has following drawback：(1) foil gauge and sample bonding process are cumbersome and are difficult the palm
Hold；(2) sample is easily breakdown in test process, therefore needs the sample for preparing a large amount of bonding foil gauges to carry out system testing；
(3) foil gauge is larger using difficulty is bonded at high temperature, is difficult calibration, and test error is larger.Therefore the test generally used now
Mode wastes time and energy, and significantly reduces the operating efficiency of researcher and related practitioner.
Therefore, be badly in need of design and develop a kind of achievable rapid batch test material power, electricity, it is thermal coupling can test set
It is standby, Efficiency of the scientific research personnel to the complicated problem in science such as stress/strain, electric field, thermal field of advanced function material is improved, together
When be alternatively actuator research and development and manufacturing enterprise provide different temperatures environment under product capability electrical property experimental test platform.
The content of the invention
It is an object of the invention to provide the test system of ferroelectric material respondent behavior under a kind of power-electric-thermal coupling condition.
The test system of ferroelectric material respondent behavior under the power that the present invention is provided-electric-thermal coupling condition, including test flume,
Power loading unit, electric field loading unit, stress measurement unit, strain measurement unit, temperature control unit, data acquisition unit and
Data processing unit；Wherein, test flume fills nonconducting flow model heat-conduction medium in it, and test flume is used for placing sample；
Power loading unit, for loading the controllable field of force to sample；Electric field loading unit, for loading controllable electric field to sample；Should
Power measuring unit, for measuring the stress data of sample generation；Strain measurement unit, for measuring the dependent variable of sample generation
According to；Temperature control unit, for regulating and controlling nonconducting flow model heat-conduction medium in the temperature of sample local environment, i.e. test flume
Temperature；Data acquisition unit, it is equal with electric field loading unit, stress measurement unit, strain measurement unit and temperature control unit
It is connected, for the temperature data of the electric field data, stress data, strain data and the electric field local environment that gather sample；At data
Unit is managed, for handling the data that data acquisition unit is gathered, the respondent behavior of sample is obtained.
Further, test flume is placed on a base.
Further, power loading unit includes actuator, power conduction mechanism and force controller, and the loading force of actuator passes through
Power conduction mechanism is put on sample, and force controller is used for controlling the loading speed of actuator and the size of loading force.
Further, power conduction mechanism includes a spacing framework, power conduction regulating part and a power conductive body, power conduction
Regulating part is placed in spacing framework, and power conductive body is connected to below power conduction regulating part, and power conduction regulating part is used for adjusting power
The angle of conductive body.
Preferably, setting dome at the top of power conduction regulating part, the contact position of power conduction regulating part bottom and spacing framework is set
Rubber washer, the angle adjusting piece positioned at spacing framework both sides passes through spacing framework, and is contacted with power conduction regulating part.
Further, electric field loading unit includes Top electrode, bottom electrode, high-voltage power amplifier, signal generator and quiet
Electricity meter, Top electrode is located at power loading unit bottom, and provided with upper insulating barrier between power loading unit bottom；Bottom electrode is fixed on examination
Check of foundation subsoil bottom, and it is provided with lower insulating barrier between experiment trench bottom；Signal generator connects high-voltage power amplifier, and high-voltage power is put
Big device connection bottom electrode, electrometer connection Top electrode.
Further, stress measurement unit is force snesor, when described power loading unit includes actuator, power conduction machine
When structure and force controller, it is located between actuator and power conduction mechanism.
Preferably, strain measurement unit includes displacement transducer, displacement transducer crossbeam, the first damping spring and second
Damping spring, displacement transducer with can the mode of removing be fixed on displacement transducer crossbeam, displacement transducer crossbeam horizontal through
Power conduction mechanism, displacement transducer crossbeam two ends set the first damping spring and the second damping spring respectively, the first damping spring and
Second damping spring is individually fixed in a pair of brackets.
Further, temperature control unit includes heating module, temperature sensor and temperature controller, heating module and temperature
Degree sensor is placed in test flume, and heating module and temperature sensor are all connected with temperature controller.
Further, data acquisition unit is multichannel collecting card.
Further, data processing unit includes Sawyer-Tower circuits, and it is used for calculating sample according to electric field data
Polarization intensity.
Compared to the prior art, the invention has the advantages that and beneficial effect：
The present invention can individually load the field of force, electric field or load the field of force, electric field simultaneously under condition of different temperatures, quick same
Ferroelectric hysteresis loop (P-E), the butterfly curve (S-E) of pacing amount sample under different prestressing force etc. can reflect the data of respondent behavior,
Measurement result can be used for respondent behavior of the research ferroelectric material under the conditions of power, electricity, thermal coupling, the machine for understanding ferroelectric material
Reason, optimization ferroelectric material performance are extremely important.
Brief description of the drawings
Fig. 1 is the concrete structure schematic diagram that present system is not directed to signal hop；
Fig. 2 is the concrete structure schematic diagram of present system；
Fig. 3 is the ferroelectric hysteresis loop figure of sample under room temperature condition in embodiment；
Fig. 4 is the butterfly loop line figure of sample under room temperature condition in embodiment；
Fig. 5 is the ferroelectric hysteresis loop figure of sample under 80 DEG C of temperature conditionss in embodiment；
Fig. 6 is the butterfly loop line figure of sample under 80 DEG C of temperature conditionss in embodiment.
In figure, 1- test flumes, 2- samples, 301- actuator, 302- power conduction mechanisms, the spacing frameworks of 3021-, 3022- power
Conduct regulating part, 3023- power conductive bodies, 3024- domes, 3025- rubber washers, 3026- angle adjusting pieces, the control of 303- power
Device, 304a- upper limit devices, 304b- lower retainers, 401- Top electrodes, 402- bottom electrodes, 403- high-voltage power amplifiers, 404-
Insulating barrier under signal generator, 405- electrometers, the upper insulating barriers of 406a-, 406b-, 407- electric capacity, 501- force snesors, 601-
Displacement transducer, 602- displacement transducer crossbeams, the damping springs of 603a- first, the damping springs of 603b- second, 701- heated moulds
Block, 702- temperature sensors, 703- temperature controllers, 801- multichannel collecting cards, 901- bases, 902a- support arms, 902b-
Inner support, 10- computers.
Embodiment
The specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
Present system includes test flume 1, power loading unit, electric field loading unit, stress measurement unit, strain measurement list
Member, temperature control unit, data acquisition unit and data processing unit.Nonconducting flow model heat transfer is filled in test flume 1
Medium, test flume 1 is used for placing sample 2, nonconducting flow model heat-conduction medium be used for sample 2 provide good heat conduction and
Insulate environment.Described nonconducting flow model heat-conduction medium is preferably silicone oil, and silicone oil has good thermal conductivity, insulating properties
And mobility.Power loading unit is used for loading sample 2 in the controllable field of force.Electric field loading unit is controllable for being loaded to sample 2
Electric field.Stress measurement unit is used for measuring the stress data of the generation of sample 2.Strain measurement unit is produced for measuring sample 2
Strain data.Temperature control unit is used for regulating and controlling the temperature of the local environment of sample 2, that is, regulates and controls nonconducting stream in test flume 1
The temperature of ejector half heat-conduction medium.Data acquisition unit, with electric field loading unit, stress measurement unit, strain measurement unit and
Temperature control unit is connected, for the temperature of the electric field data, stress data, strain data and the electric field local environment that gather sample
Degrees of data.Data processing unit, for handling the data that data acquisition unit is gathered, obtains the respondent behavior of sample.
See in Fig. 1~2, present embodiment, test flume 1 is placed on base 901, it is vertical on base 901 to be provided with a pair
Support arm 902a and a pair of inner support 902b, a pair of support arm 902a are outside a pair of inner support 902b.Power loading unit includes
Actuator 301, power conduction mechanism 302 and force controller 303, actuator 301 are located between a pair of inner support 902b, and can be along a pair
Inner support 902b is freely up and down moved.The loading force of actuator 301 is put on sample 2 by power conduction mechanism 302, power control
Device 303 is used for controlling the loading speed of actuator 301 and the size of loading force.Because actuator 301 can be moved freely up and down, it is
Avoid displacement excessive and physical damage is caused to displacement transducer 601, upper limit is set using in a pair of inner support 902b
Device 304a and lower retainer 304b, to limit the moving range of actuator 301.
More specifically, power conduction mechanism 302 includes a spacing framework 3021, power conduction regulating part 3022 and one power conduction
Main body 3023, power conduction regulating part 3022 is placed in spacing framework 3021, and power conductive body 3023 is connected to power conduction regulating part
3022 lower sections, power conduction regulating part 3022 is used for adjusting the angle of power conductive body 3023.In this specific implementation, power conductive body
3023 is cylindrical.
To ensure that loading force is equably loaded onto on sample, the risk of sample physical damage is reduced, spy provides one kind preferably
Scheme, i.e.,：Power conduction regulating part 3022 top sets dome 3024, and the power conduction bottom of regulating part 3022 and spacing framework 3021 connect
Synapsis sets rubber washer 3025, positioned at the spacing both sides of framework 3021 angle adjusting piece 3026 pass through spacing framework 3021, and with
Power conduction regulating part 3022 is contacted.More specifically, angle adjusting piece 3026 uses screw.Pass through dome 3024 and precession or rotation
Go out the angle adjusting piece 3026 of the spacing both sides of framework 3021, the slight shift of adjustable force conductive body 3023, to avoid force
Face tilts the problems such as caused active force is uneven.
In present embodiment, electric field loading unit includes Top electrode 401, bottom electrode 402, high-voltage power amplifier
403rd, signal generator 404 and electrometer 405, sample 2 are placed between Top electrode 401 and bottom electrode 402, high-voltage power amplifier
403 connection bottom electrodes 402, the connection Top electrode 401 of electrometer 405.Signal generator 404 is used to produce various frequencies and amplitude
Waveform electric signal, high-voltage power amplifier 403 is used to waveform electric signal being amplified to required high pressure, and loads on sample 2, real
The loading of the existing external electric field of sample 2.When loading electric field to sample 2, Top electrode 401, bottom electrode 402 and sample 2 should be totally submerged
In nonconducting flow model heat-conduction medium, it is to avoid in the direct exposure air of high pressure, prevent arc discharge.
Top electrode 401 is located at the bottom of power conductive body 3023, is provided between Top electrode 401 and the bottom of power conductive body 3023
Upper insulating barrier 406a；Bottom electrode 402 is fixed on the bottom of test flume 1, likewise, being provided with down between bottom electrode 402 and the bottom of test flume 1
Insulating barrier 406b.Top electrode 401 and bottom electrode 402 band cable interface, electrometer 405 connect Top electrode by cable interface
401, high-voltage power amplifier 403 connects bottom electrode 402 by cable interface.To realize the physics for accurately measuring and avoiding sample
Damage, Top electrode 401 and bottom electrode 402 should have good electric conductivity, high hardness and flatness.
In present embodiment, stress measurement unit uses force snesor 501, and it is located at actuator in power loading unit
Between 301 and power conduction mechanism 302, for measuring the stress number that the loading force data acted on sample 2 and sample 2 are produced
According to.
In present embodiment, strain measurement unit mainly uses displacement transducer 601, is produced for measuring sample 2
Strain data.To eliminate the dither of external environment, measurement accuracy is improved there is provided a kind of preferred scheme, i.e.,：Displacement sensing
Device 601 with can the mode of removing be fixed on displacement transducer crossbeam 602, displacement transducer crossbeam 602 be located at Top electrode 401 on
Side, and through power conductive body 3023, more specifically, displacement transducer 601 is located in power conductive body 3023；Displacement transducer
The two ends of crossbeam 602 set the first damping spring 603a and the second damping spring 603b respectively, and the first damping spring 603a and second subtracts
Shake spring 603b is individually fixed on a pair of inner support 902b.Specifically, displacement transducer 601 is passed using CPL capacitive displacements
Sensor, its work range is 500 μm, and resolution ratio is up to 25nm.
The height adjustable of displacement transducer crossbeam 602, specifically, passing through the first damping spring 603a and the second damping spring
Column screw inside 603b realizes height adjustable；Or displacement transducer crossbeam is realized by adjustable for height inner support 902b
402 height adjustable.
In present embodiment, temperature control unit includes heating module 701, temperature sensor 702 and temperature control
Device 703, heating module 701 and temperature sensor 702 are all connected with temperature controller 703.Heating module 701 and temperature sensor
702 are placed in test flume 1, and heating module 701 is used for nonconducting flow model heat-conduction medium heating, temperature in test flume 1
Sensor 702 monitors the temperature data of flow model heat-conduction medium and is transferred to temperature controller 703, temperature controller in real time
703 are used for controlling heating module 701, flow model heat-conduction medium is reached required temperature and is kept constant.More specifically, heat
Module 701 uses heater strip, is distributed in surrounding in the groove of test flume 1；Temperature controller 703 uses PID controller, and it controls heating
Module 701, can make arbitrary temp of the flow model heat-conduction medium temperature in the range of room temperature to 200 DEG C in test flume 1 keep permanent
It is fixed.Before the system starts measurement, temperature in test flume 1 should be made to be kept for constant half an hour, to ensure test flume in measurement process
The stabilization of internal temperature.
In present embodiment, data acquisition unit is multichannel collecting card 801, and multichannel collecting card 801 gathers height
Press power amplifier 403, electrometer 405, force snesor 501, displacement transducer 601, the signal of temperature sensor 702.Data
Processing unit is used for that the data-signal that data acquisition unit is gathered is stored and handled, so as to obtain the respondent behavior of sample.Number
It can be computer 10 according to processing unit, see Fig. 2, the connecting multi-channel capture card 801 of computer 10, signal generator 404 and power
Controller 303, it can be used to connect signal generator 404 and force controller 303.
As a kind of scheme, data processing unit also includes Sawyer-Tower circuits, and it is used for the letter to electrometer 405
Number handled, obtain the polarization intensity of sample, be specially：With sample series capacitance 407, generally, the capacitance C of electric capacity 407x
Three orders of magnitude higher than the capacitance of sample.The both end voltage V of electric capacity 407, present embodiment are measured using electrometer 405
Employed in electrometer 405 resistance value be more than 1010Ohm；Utilize formula Q=Cx× V calculates sample two ends quantity of electric charge Q, according to
Sample two ends quantity of electric charge Q, the polarization intensity P of sample is calculated using formula P=Q/S, wherein, S is the contact with electrode of sample
Area.
To ensure that all electric units must altogether in the Stability and veracity of measurement result, the system.
Embodiment
Measure the PZT5 ferroelectric hysteresis loops (P-E) and butterfly loop line (S-E) under power-electric-thermal coupling condition
Specification is placed between the Top electrode in test flume and bottom electrode for 6mm*6mm*3mm PZT5 samples, power is adjusted
Conduction mechanism makes the distance of Top electrode and sample upper surface be 1mm~2mm.
At room temperature, it is respectively 36N (1MPa), 900N (25MPa), 1800N (50MPa), 2700N to sample loading size
(75MPa), 4500N (125MPa), 7200N (200MPa) prestressing force, power loading speed are 3.5MPa/s, the loading per phases forces
After keep 300s.150s, Regulate signal generator and high-voltage power amplifier are kept after actuator force value reaches prestressing force, is made
Output voltage amplitude is ± 6kV, the triangular pulse voltage that frequency is 1Hz, i.e., apply 2kv/mm bipolarity at sample two ends
Electric field.Data acquisition unit collection electric field data, stress data, strain data and temperature data.Often complete a prestressing force bar
Part, is reached after preset hold time, into next prestressing force condition, repeats the above-mentioned measurement process of progress.
The data that computer is gathered to data acquisition unit are handled, and can obtain the ferroelectric hysteresis loop of sample and butterfly at room temperature
Loop line, is shown in Fig. 3 and Fig. 4.
It is 80 DEG C to regulate and control silicone oil temperature, after stable half an hour, repeats aforesaid operations, obtains sample under 80 DEG C of temperature conditionss
Ferroelectric hysteresis loop and butterfly loop line, such as Fig. 5 and Fig. 6.
Certainly, the operation that this test system can be carried out is not limited in the measurement power-electric-thermal coupling bar shown in case
Ferroelectric hysteresis loop and butterfly loop line under part, can also measure the performance parameters such as fatigue, the creep of material.In addition, utilizing this test
System collocation electric impedance analyzer (such as HP4294) is used, and can also measure the dielectric properties under the conditions of material power-thermal coupling.
Therefore illustrate hereby：It is only one of embodiments of the present invention described in case, embodiments of the present invention are not by upper
State the limitation of embodiment, any one skilled in the art the invention discloses technical scope in, can think easily
Other replacement methods arrived or some improvement polishing, should be included in the scope of the protection.
Claims (10)
1. the test system of ferroelectric material respondent behavior under power-electric-thermal coupling condition, it is characterized in that：
Including test flume, power loading unit, electric field loading unit, stress measurement unit, strain measurement unit, temperature control list
Member, data acquisition unit and data processing unit；Wherein, test flume fills nonconducting flow model heat-conduction medium in it, tries
Check of foundation subsoil is used for placing sample；Power loading unit, for loading the controllable field of force to sample；Electric field loading unit, for sample
The controllable electric field of loading；Stress measurement unit, for measuring the stress data of sample generation；Strain measurement unit, for measuring
The strain data that sample is produced；Temperature control unit, it is nonconducting in the temperature of sample local environment, i.e. test flume for regulating and controlling
The temperature of flow model heat-conduction medium；Data acquisition unit, with electric field loading unit, stress measurement unit, strain measurement unit
It is connected with temperature control unit, for gathering electric field data, stress data, strain data and the electric field local environment of sample
Temperature data；Data processing unit, for handling the data that data acquisition unit is gathered, obtains the responsive trip of sample
For.
2. the test system of ferroelectric material respondent behavior under power as claimed in claim 1-electric-thermal coupling condition, it is characterized in that：
Described power loading unit includes actuator, power conduction mechanism and force controller, and the loading force of actuator is conducted by power
Mechanism is put on sample, and force controller is used for controlling the loading speed of actuator and the size of loading force.
3. the test system of ferroelectric material respondent behavior under power as claimed in claim 2-electric-thermal coupling condition, it is characterized in that：
Described power conduction mechanism includes a spacing framework, power conduction regulating part and a power conductive body, power conduction regulating part
It is placed in spacing framework, power conductive body is connected to below power conduction regulating part, power conduction regulating part is used for adjusting power conduction master
The angle of body.
4. the test system of ferroelectric material respondent behavior under power as claimed in claim 3-electric-thermal coupling condition, it is characterized in that：
Dome is set at the top of described power conduction regulating part, power conducts regulating part bottom and the contact position of spacing framework sets rubber blanket
Circle, the angle adjusting piece positioned at spacing framework both sides passes through spacing framework, and is contacted with power conduction regulating part.
5. the test system of ferroelectric material respondent behavior under power as claimed in claim 1-electric-thermal coupling condition, it is characterized in that：
Described electric field loading unit includes Top electrode, bottom electrode, high-voltage power amplifier, signal generator and electrometer, on
Electrode is located at power loading unit bottom, and provided with upper insulating barrier between power loading unit bottom；Bottom electrode is fixed on test flume bottom
Portion, and it is provided with lower insulating barrier between experiment trench bottom；Signal generator connects high-voltage power amplifier, and high-voltage power amplifier connects
Connect bottom electrode, electrometer connection Top electrode.
6. the test system of ferroelectric material respondent behavior under power as claimed in claim 1-electric-thermal coupling condition, it is characterized in that：
Described stress measurement unit is force snesor, when described power loading unit includes actuator, power conduction mechanism and power
During controller, it is located between actuator and power conduction mechanism.
7. the test system of ferroelectric material respondent behavior under power as claimed in claim 1-electric-thermal coupling condition, it is characterized in that：
Described strain measurement unit includes displacement transducer, displacement transducer crossbeam, the first damping spring and the second damping bullet
Spring, displacement transducer with can the mode of removing be fixed on displacement transducer crossbeam, displacement transducer crossbeam horizontal through power conduct
Mechanism, displacement transducer crossbeam two ends set the first damping spring and the second damping spring respectively, and the first damping spring and second subtract
Shake spring is individually fixed in a pair of brackets.
8. the test system of ferroelectric material respondent behavior under power as claimed in claim 1-electric-thermal coupling condition, it is characterized in that：
Described temperature control unit includes heating module, temperature sensor and temperature controller, heating module and TEMP
Device is placed in test flume, and heating module and temperature sensor are all connected with temperature controller.
9. the test system of ferroelectric material respondent behavior under power as claimed in claim 1-electric-thermal coupling condition, it is characterized in that：
Described data acquisition unit is multichannel collecting card.
10. the test system of ferroelectric material respondent behavior, its feature under power as claimed in claim 1-electric-thermal coupling condition
It is：
Described data processing unit includes Sawyer-Tower circuits, and it is strong for the polarization according to electric field data calculating sample
Degree.
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| CN112362469A (en) * | 2020-09-29 | 2021-02-12 | 东莞材料基因高等理工研究院 | Small punch test device |
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