CN106353372A - Resistivity testing device capable of regulating temperature, atmosphere and density of powder material - Google Patents
Resistivity testing device capable of regulating temperature, atmosphere and density of powder material Download PDFInfo
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- CN106353372A CN106353372A CN201610985583.7A CN201610985583A CN106353372A CN 106353372 A CN106353372 A CN 106353372A CN 201610985583 A CN201610985583 A CN 201610985583A CN 106353372 A CN106353372 A CN 106353372A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/043—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a granular material
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Abstract
The invention discloses a resistivity testing device capable of regulating the temperature, atmosphere and density of a powder material. Firstly, the equipment is small in volume and convenient, temperature regulation is performed through a constant-temperature zone of a tubular furnace, different electrodes are changed for connection at different temperatures and in different atmospheres, and direct contact resistance between the powder and a wire as well as the redox of an electrode at different temperatures and in different atmospheres is reduced, so that the accuracy of the test data is high; secondly, by adopting a straight-blowing gas supply way at the sealed bottom, direct contact between the gas and the powder as well as uniform gas distribution can be guaranteed, and uniform gas distribution is guaranteed and the problem of powder particle loss is solved through different numbers of gas guide plates; and finally, by adopting a screw type central pressurizing way and increasing the length of a pressurizing screw, uniform pressure distribution between the powder and the electrode can be guaranteed, the fixing stability is high, and the pressure is kept unchanged in the case of material expansion at a high temperature; and moreover, with the same powder mass, the resistivity of the powder of the same material and at different compaction densities is measured according to the rotation number of turns of the screw.
Description
Technical field
The present invention relates to test powder body material performance detection technique field, particularly to a kind of to powder body material temperature,
Atmosphere and consistency regulatable resistivity measurement device.
Background technology
Resistivity, also known as the inverse of resistance coefficient or electrical conductivity, is the physical quantity of description materials conductive performance.Electric conductivity
Research of interest by substantial amounts of researcher always in the field such as catalysis, electrochemistry and electronics technology.Resistivity is to characterize material
The important physical parameter of electric conductivity, the measurement of the wherein electronic conductivity of powder body material be evaluate materials application during can not
Or the important parameter lacking.The test of therefore resistivity is to the improvement optimizing catalysis material and membrane electrode material preparation process and electronics
The selection of equipment functionalization and its key.
The method of test powder resistance rate mainly has briquetting method, four probe method etc. at present.Chen Weidong et al. sending out in design
In bright patent (cn200810216653.8), first powder body is passed through tablet machine briquetting, and cover metal powder in briquetting powder body both sides
Body, then connecting test device passes through direct current shunting and AC impedence method obtains the resistivity of powder body, and the method passes through metal
Powder body reduces briquetting and the direct resistance of wire, and the method certainty of measurement is high, but method of testing is single, does not also consider to measure
Different temperatures, different atmosphere, the powder resistance rate under different compacted densities；In the patent of invention of Wang Xindong et al. design
(cn201310057222.2), by by powder body tabletting and the method that sprays, the method that powder body is placed in heating in test cell,
Powder resistance rate is tested, the method can test the powder resistance rate under different temperatures, but for different atmosphere and
It need to be improved on the measuring condition of different compacted densities；In the patent of invention of Wu Shengben et al. design
(cn200710103773.2), it is placed in pressure warehouse by a test powder body and is pressurizeed, then with resistance meter, sample is entered
The measurement of row resistivity, the method can measure the powder resistance rate under different compacted densities, but in different temperatures, no
There is weak point with atmosphere to the measurement of powder resistance rate.And for catalysis, electrochemistry, the material such as electrical equipment is in actual applications
Need to consider the change in resistance of material under different condition, this plays key reference value for the improvement of material with optimization.
Therefore present invention offer is a kind of will to powder body material temperature, atmosphere and consistency regulatable resistivity measurement device
Can solve the problem that the problems referred to above.
Content of the invention
For overcoming the problems referred to above, present invention present device compact first is convenient, can pass through tube furnace zone of constant temperature
Carry out temperature adjusting, and change Different electrodes (such as: the material such as pt, ag, cu, au, mo) by under different temperatures and different atmosphere
Electrode is attached, and reduces the oxidoreduction of powder body and the direct contact resistance of wire and different temperatures different atmosphere bottom electrode,
Make test data accuracy high；Secondly present invention designs sealed bottom blow-through and supplies gas mode, ensure that gas and powder body
Directly contact and gas is evenly distributed, and ensure that gas is uniformly distributed and powder granule by the gas guide board of different meshes
Losing issue；The screw center pressuring method of last present invention design and increase pressurization spiro rod length, ensure that to powder body
Uniformly, stability maintenance is high and solves material under high temperature for pressure distribution and electrode (such as: the material such as pt, ag, cu, au, mo) between
Pressure when material expands is constant, and in identical powder quality, is realized different to same material by the rotation number of turns of screw rod
The measurement of powder resistance rate under compacted density.
For achieving the above object, technical solution of the present invention is as follows: al2o3Sleeve pipe (1), the cake seal plug with air inlet
Head (2a), the cake seal plug (2b) with gas outlet and wire outlet, air inlet pipe (3), gas outlet (4), carry air inlet
Support (5a), screwed support (5b), pressurization storage bin (6), sample to be tested powder body (7), electrode (8), carry water conservancy diversion
The semi-circular gas distributor (9) of plate, screwed t type screw rod (10), with the increased pressure board (11) of necking, inlet
External fixed support (12a), the external stent (12b) of standing screw.
Described al2o3The inside of sleeve pipe (1) both sides respectively with the cake seal plug (2a) with air inlet, with giving vent to anger
The cake seal plug (2b) of mouth and wire outlet carries out sealing cooperation, air inlet pipe (3) and the cake seal plug with air inlet
Head (2a) and the tight fit of the support (5a) with air inlet, the support (5a) with air inlet and screwed support (5b)
It is fixed in identical platform, this platform is arranged on cake seal plug (2a) with air inlet, goes out with gas outlet and wire
Al between the cake seal plug (2b) of mouth2o3The inside of sleeve pipe (1)；Pressurization storage bin (6) and the support with air inlet
(5a) closely connect, pressurize storage bin (6) and the semi-circular gas distributor with deflector are passed through in one end of air inlet pipe (3)
(9) carry out sealing cooperation, the t shape end of screwed t type screw rod (10) is closely joined with increased pressure board (11) surface with necking
Close, screwed t type screw rod (10) is arranged vertically with the increased pressure board (11) with necking；The external fixed support of inlet
(12a), the external stent (12b) of standing screw is separately positioned on al2o3Outside the both sides of sleeve pipe (1), air inlet pipe (3) with bring into
The external fixed support (12a) of QI KOU contacts and coordinates, the external fixed support (12a) of inlet with pressurization storage bin
(6) surfaces mate, the external fixed support (12a) of inlet is arranged vertically with pressurization storage bin (6), standing screw
External stent (12b) and screwed t type screw rod (10) cooperation；Pressurization storage bin (6) and the increased pressure board (11) with necking
Between central filler have a sample to be tested powder body (7), two electrodes (8) are respectively inserted in pressurization storage bin (6) and sample to be tested powder
Between increased pressure board (11) between body (7) with necking and sample to be tested powder body (7).
Described pressurization storage bin (6), the semi-circular gas distributor (9) with deflector and the increased pressure board with necking
(11) be unlikely to deform, non-conductive, high temperature resistant, corrosion resistant quartz or hexagonal boron nitride material.
Described air inlet pipe (3), the support (5a) with air inlet, screwed support (5b), screwed t type spiral shell
The external stent (12b) of bar (10), the external fixed support (12a) of inlet and standing screw can set according to temperature and atmosphere
Count different materials, material require not react with reaction atmosphere and high temperature resistant, be difficult deformation, the coefficient of expansion is little under high temperature
The materials such as dilval, quartz.
Circular air inlet is arranged at the bottom of the described semi-circular gas distributor (9) with deflector.
Described pressurization storage bin (6) be shaped as cuboid or square, this shape facilitates electrode (8) and sample to be tested
The filling of powder body (7).
On described screwed t type screw rod (10) with scale, the convenient unit with length is come metering pressure
Size, thus calculate compacted density and the ratio of pressure.
The deflector mesh number on semi-circular gas distributor (9) with deflector must assure that powder granule can not lead to
Cross.
The described air inlet of the semi-circular gas distributor (9) with deflector is with sample to be tested powder body (7) same
On centrage.
Resistivity measurement formula isCalculate the specific insulation of sample by resistivity measurement formula,
In resistivity measurement formula, ρvRepresent the specific insulation (ω cm) of sample, rvRepresent the resistance (ω) of sample, s represents examination
Cross-sectional area (the cm of sample2), l represents the length (cm) of sample.Wherein surveyed according to the test of direct current polarization curve and AC impedance
Examination, obtains total impedance rv, then total electricalresistivityρ is being calculated by formulav.
It is an advantage of the current invention that: 1, device structure compact volume and convenience, trip temperature can be entered to powder sample by tube furnace
Control；2nd, contacted with powder body by Different electrodes (such as: the material such as pt, ag, cu, au, mo), prevent wire from directly connecing with powder body
Electric shock resistance and the oxidoreduction reducing powder body and the direct contact resistance of wire and different temperatures different atmosphere bottom electrode, thus shadow
Ring experimental result；3rd, sealed bottom blow-through is supplied gas mode, ensure that gas with powder body directly contact and gas is evenly distributed；
4th, ensure that gas is uniformly distributed the losing issue with powder granule by the gas guide board of different meshes；5th, screw center adds
Pressure mode, ensure that to the pressure distribution between powder body and Different electrodes (such as: the material such as pt, ag, cu, au, mo) uniformly, Gu
Determine stability pressure that is high and solving when material under high temperature expands constant；6th, realized to same material by the rotation number of turns of screw rod
The measurement of powder resistance rate under different compacted densities.
Brief description
Fig. 1 is a kind of structural representation to powder body material temperature, atmosphere and consistency regulatable resistivity measurement device
Figure.
Fig. 2 is the side view of the cake seal plug (2b) with gas outlet and wire outlet.
Fig. 3 is the side view of the support (5a) with air inlet.
Fig. 4 is the side view of screwed support (5b).
Fig. 5 is the schematic diagram of deflector.
Fig. 6 is the axonometric chart of the semi-circular gas distributor (9) with deflector.
Fig. 7 is the axonometric chart of the semi-circular gas distributor (9) with deflector and pressurization storage bin (6).
In figure: 1, al2o3Sleeve pipe, 2a, the cake seal plug with air inlet, 2b, with gas outlet and wire outlet
Cake seal plug 3, air inlet pipe, 4, gas outlet, 5a, carry air inlet support, 5b, screwed support 6, pressurization storing
Storehouse, 7, sample to be tested powder body, 8, electrode, 9, the semi-circular gas distributor with deflector, 10, screwed t type screw rod,
11st, the increased pressure board of necking, 12a, the external fixed support of inlet, 12b, the external stent of standing screw are carried.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail
As shown in figure 1, a kind of of the present invention fills to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency
The structure put is: al2o3Sleeve pipe (1), the cake seal plug (2a) with air inlet, the circle with gas outlet and wire outlet
Cake seal plug (2b), air inlet pipe (3), gas outlet (4), with the support (5a) of air inlet, screwed support (5b), plus
Press storage bin (6), sample to be tested powder body (7), electrode (8), the semi-circular gas distributor (9) with deflector, be threaded
T type screw rod (10), with the increased pressure board (11) of necking, the external fixed support (12a) of inlet, standing screw external
Support (12b).
1) first the electrode (8) with wire and sample to be tested powder body (7) are filled in pressurization storage bin (6).
2) rotate threaded t type screw rod (10) sample to be tested (7) to be compacted and records threaded t type screw rod
(10) scale on.
3) equipment of the sample to be tested (7) having loaded is put in tube furnace.
4) the cake seal plug (2a) with air inlet and the cake seal plug with gas outlet and wire outlet
(2b) put into sealing cooperation in tube furnace.
5) add tube furnace and be passed through the gas to be tested of certain time so that temperature and gas reach test condition.
6) pressure by bringing when observing the change of threaded t type screw rod (10) scale and adjusting because of high-temperature expansion misses
Difference, and be corrected by rotating screwed t type screw rod (10).
7) finally access electrochemical test at working electrode two ends, and proceed by resistivity of material measurement.
Claims (10)
1. a kind of to powder body material temperature, atmosphere and consistency regulatable resistivity measurement device it is characterised in that: al2o3Set
Manage (1), the cake seal plug (2a) with air inlet, the cake seal plug (2b) with gas outlet and wire outlet, enter
Trachea (3), gas outlet (4), with the support (5a) of air inlet, screwed support (5b), pressurization storage bin (6), to be measured
Sample powder body (7), electrode (8), the semi-circular gas distributor (9) with deflector, screwed t type screw rod (10), band
There are the increased pressure board (11) of necking, the external fixed support (12a) of inlet, the external stent (12b) of standing screw；
Described al2o3The inside of sleeve pipe (1) both sides respectively with the cake seal plug (2a) with air inlet, with gas outlet and
The cake seal plug (2b) of wire outlet carries out sealing cooperation, air inlet pipe (3) and the cake seal plug with air inlet
(2a) support (5a) with air inlet is fitted close, and the support (5a) with air inlet is solid with screwed support (5b)
It is scheduled in identical platform, this platform is arranged on cake seal plug (2a) with air inlet, carries gas outlet and wire outlet
Cake seal plug (2b) between al2o3The inside of sleeve pipe (1)；Pressurization storage bin (6) and the support (5a) with air inlet
Closely connect, one end of air inlet pipe (3) is passed through pressurization storage bin (6) and entered with the semi-circular gas distributor (9) with deflector
Row sealing cooperation, the t shape end of screwed t type screw rod (10) and increased pressure board (11) surfaces mate with necking, band
Threaded t type screw rod (10) is arranged vertically with the increased pressure board (11) with necking；The external fixed support of inlet
(12a), the external stent (12b) of standing screw is separately positioned on al2o3Outside the both sides of sleeve pipe (1), air inlet pipe (3) with bring into
The external fixed support (12a) of QI KOU contacts and coordinates, the external fixed support (12a) of inlet with pressurization storage bin
(6) surfaces mate, the external fixed support (12a) of inlet is arranged vertically with pressurization storage bin (6), standing screw
External stent (12b) and screwed t type screw rod (10) cooperation；Pressurization storage bin (6) and the increased pressure board (11) with necking
Between central filler have a sample to be tested powder body (7), two electrodes (8) are respectively inserted in pressurization storage bin (6) and sample to be tested powder
Between increased pressure board (11) between body (7) with necking and sample to be tested powder body (7).
2. according to claim 1 a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency fill
Put it is characterised in that: described pressurization storage bin (6), with deflector semi-circular gas distributor (9) and with necking plus
Pressing plate (11) is for being unlikely to deform, non-conductive, high temperature resistant, corrosion resistant quartzy or hexagonal boron nitride material.
3. according to claim 1 a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency fill
Put it is characterised in that: described air inlet pipe (3), with the support (5a) of air inlet, screwed support (5b), be threaded
The external stent (12b) of t type screw rod (10), the external fixed support (12a) of inlet and standing screw can be according to temperature
The material different with atmosphere design, material require not react with reaction atmosphere and high temperature resistant, be difficult deformation, expand under high temperature
The little dilval of coefficient or quartz material.
4. according to claim 1 a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency fill
Put it is characterised in that: circular air inlet is arranged at the bottom of the described semi-circular gas distributor (9) with deflector.
5. according to claim 1 a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency fill
Put it is characterised in that: described pressurization storage bin (6) be shaped as cuboid or square, this shape facilitates electrode (8) and treats
The filling of test specimens powder body (7).
6. according to claim 1 a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency fill
Put it is characterised in that: on described screwed t type screw rod (10) with scale, convenient measured with the unit of length
The size of pressure, thus calculate compacted density and the ratio of pressure.
7. according to claim 1 a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency fill
Put it is characterised in that: the deflector mesh number on semi-circular gas distributor (9) with deflector must assure that powder granule not
Can pass through.
8. according to claim 1 a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency fill
Put it is characterised in that: the described air inlet of the semi-circular gas distributor (9) with deflector and sample to be tested powder body (7)
On same centrage.
9. according to claim 1 a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency fill
Put it is characterised in that: resistivity measurement formula isCalculate the volume electricity of sample by resistivity measurement formula
Resistance rate, in resistivity measurement formula, ρvRepresent the specific insulation (ω cm) of sample, rvRepresent the resistance (ω) of sample, s
Represent the cross-sectional area (cm of sample2), l represents the length (cm) of sample；Wherein tested according to direct current polarization curve and exchange
Testing impedance, obtains total impedance rv, then total electricalresistivityρ is being calculated by formulav.
10. according to claim 1 a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement of consistency fill
Put it is characterised in that:
1) first the electrode (8) with wire and sample to be tested powder body (7) are filled in pressurization storage bin (6)；
2) rotate threaded t type screw rod (10) sample to be tested (7) to be compacted and records on threaded t type screw rod (10)
Scale；
3) equipment of the sample to be tested (7) having loaded is put in tube furnace；
4) the cake seal plug (2a) with air inlet and the cake seal plug (2b) with gas outlet and wire outlet
Put into sealing cooperation in tube furnace；
5) add tube furnace and be passed through the gas to be tested of certain time so that temperature and gas reach test condition；
6) pressure error by bringing when observing the change of threaded t type screw rod (10) scale and adjusting because of high-temperature expansion,
And be corrected by rotating screwed t type screw rod (10)；
7) finally access electrochemical test at working electrode two ends, and proceed by resistivity of material measurement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610985583.7A CN106353372B (en) | 2016-11-09 | 2016-11-09 | It is a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement device of consistency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610985583.7A CN106353372B (en) | 2016-11-09 | 2016-11-09 | It is a kind of to powder body material temperature, atmosphere and the regulatable resistivity measurement device of consistency |
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| Publication Number | Publication Date |
|---|---|
| CN106353372A true CN106353372A (en) | 2017-01-25 |
| CN106353372B CN106353372B (en) | 2018-11-13 |
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243874A (en) * | 2019-07-02 | 2019-09-17 | 上海应用技术大学 | A kind of method of solid electrolyte resistivity under measurement high temperature |
| CN110873823A (en) * | 2019-12-04 | 2020-03-10 | 安徽大学 | Resistivity testing method for semiconductor material |
| CN117723915A (en) * | 2024-02-06 | 2024-03-19 | 哈尔滨理工大学 | Test electrode and method for composite insulation breakdown characteristics of inorganic powder and gas |
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| SU585457A1 (en) * | 1975-12-15 | 1977-12-25 | Предприятие П/Я В-2763 | Device for measuring specific resistance |
| WO1998003856A1 (en) * | 1996-07-23 | 1998-01-29 | Commissariat A L'energie Atomique | Method and device for compacting and measuring the resistivity of powders |
| CN101000319A (en) * | 2006-10-13 | 2007-07-18 | 深圳大学 | Method and device for investingating resistivity of powder metal |
| CN103149439A (en) * | 2013-02-22 | 2013-06-12 | 北京科技大学 | Device and method for testing electric conductivity of powder material and impedance of membrane electrode |
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2016
- 2016-11-09 CN CN201610985583.7A patent/CN106353372B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU585457A1 (en) * | 1975-12-15 | 1977-12-25 | Предприятие П/Я В-2763 | Device for measuring specific resistance |
| WO1998003856A1 (en) * | 1996-07-23 | 1998-01-29 | Commissariat A L'energie Atomique | Method and device for compacting and measuring the resistivity of powders |
| CN101000319A (en) * | 2006-10-13 | 2007-07-18 | 深圳大学 | Method and device for investingating resistivity of powder metal |
| CN103149439A (en) * | 2013-02-22 | 2013-06-12 | 北京科技大学 | Device and method for testing electric conductivity of powder material and impedance of membrane electrode |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243874A (en) * | 2019-07-02 | 2019-09-17 | 上海应用技术大学 | A kind of method of solid electrolyte resistivity under measurement high temperature |
| CN110873823A (en) * | 2019-12-04 | 2020-03-10 | 安徽大学 | Resistivity testing method for semiconductor material |
| CN117723915A (en) * | 2024-02-06 | 2024-03-19 | 哈尔滨理工大学 | Test electrode and method for composite insulation breakdown characteristics of inorganic powder and gas |
| CN117723915B (en) * | 2024-02-06 | 2024-04-16 | 哈尔滨理工大学 | Test electrode and method for composite insulation breakdown characteristics of inorganic powder and gas |
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