CN103852642A - Method for detecting electrical conductivity of small number of solids - Google Patents
Method for detecting electrical conductivity of small number of solids Download PDFInfo
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- CN103852642A CN103852642A CN201210517060.1A CN201210517060A CN103852642A CN 103852642 A CN103852642 A CN 103852642A CN 201210517060 A CN201210517060 A CN 201210517060A CN 103852642 A CN103852642 A CN 103852642A
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Abstract
The invention discloses a method for detecting the electrical conductivity of a small number of solids. The method comprises the following steps that two metal nail-shaped electrodes are used for limiting detected powder in a PTFE pressure-bearing pipe, wherein the height of the pressure-bearing pipe ranges from one centimeter to three centimeters, and the diameter of the pressure-bearing pipe ranges from three millimeters to five millimeters; in the measuring process, pressure is exerted on the metal nail-shaped electrodes at the two ends, air among the powder is exhausted, and the powder is squeezed into a cylinder; the length of an inner cylindrical sample can be measured through a measuring tool, and the overall resistance is measured through a multimeter; the electrical conductivity is calculated; after measurement is completed, the metal nail-shaped electrodes are pulled out of the two ends of the pressure-bearing pipe, and the sample is ejected out of the pressure-bearing pipe through a hard needle. According to the method for detecting the electrical conductivity of a small number of solids, only a small number of samples are used, and accurate measurement data of the electrical conductivity are obtained through a very simple method on the premise that no liquid auxiliaries need to be added and no properties of the powder are changed.
Description
Technical field
The present invention relates to a kind of method that detects trace solid electric conductivity.
Background technology
In modern scientific research, the electric conductivity that all relates to pressed powder or fiber in the research category of Many researchers detects.In experiment, conventional method is that powder preparation is become to solution or suspension, utilizes existing conductivity meter to measure.Measure and have two problems like this, first be that degree of accuracy is not high, because whether the result of this method depends on solvent electric conductivity to a great extent good, the dissolubility of powder with and concentration in the solution electronic conduction network that whether can form self in solvent can affect the electric conductivity of solvent, thereby the result that impact detects; Next is not have universality, because this method will get into trouble while being used for measuring the complete soluble research objects that cannot form again suspension such as fiber, if add surfactant to be prepared into suspension, need to get rid of the impact of surfactant on monolithic conductive, if do not added, there is layering in liquid and solid, the just electric conductivity of liquid that conductivity meter is measured; Be finally that sample reclaims difficulty, after even surfactant mixes with liquid, need to carry out a large amount of work residual to remove the liquid and the auxiliary agent that adhere on powder.
Except the way of utilizing solution to measure, also having one is utilize sheeter or similarly install a large amount of powder are pressed into thin slice, utilize subsequently four probe method or directly measure by special device, this measuring method is owing to being to measure under plane after compressing tablet, it is volume conductance or surface conductivity that result is difficult to differentiate, and the method cost is very high, also there is the instrument that can directly measure after compressing tablet, but its quantitative requirement to measurement sample is larger, for the higher powder of some costs, a large amount of samples cannot be once provided, be unsuitable for adopting the method.Meanwhile, often bulky equipment such as sheeter, be not suitable for portable use.
Summary of the invention
The object of this invention is to provide a kind of method that detects trace solid electric conductivity, can only use micro-sample not needing to add any liquid adjuvants, not change under the prerequisite of any character of powder and utilize very simple gimmick to obtain conductivity measurement data accurately.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A method that detects trace solid electric conductivity, comprises the following steps:
(a) with two metal spike electrodes, detection powder being limited in to a height is 1 to 3 centimetre, in the teflon pressure-bearing pipe of diameter between 3 to 5 millimeters;
(b) while measurement, exert pressure to the metal spike electrode at two ends, discharge the air between powder, be squeezed into cylindrical;
(c) inner sample cylinder length can be measured by survey instrument, and record overall electrical resistance by multimeter, this value deducts electrode resistance value and is the cylindrical resistance value of sample;
(d) calculate conductivity, sample right cylinder resistance value can draw its volume conductance divided by its volume;
(e) after having measured, extract metal spike electrode from pressure-bearing pipe two ends, now, pressure-bearing pipe two is all openings, and sample is therefrom ejected with hard spicule.
The described teflon pressure-bearing of step (a) pipe adds stainless steel sleeve cylinder outward.
On the described metal spike of step (a) electrode, the binding post in order to contact resistance measuring equipment is all set.
Beneficial effect of the present invention is:
The method using in the application has series of advantages compared to additive method, is first that process is quite easy, there is no unnecessary superfluous tired step, uses the most simple mode to solve one of test problems the most thorny in present process of scientific research.Next has expanded the coverage that detects sample, all solid matters including powder and fiber are almost contained, no matter be organism or inorganics, no matter whether with water of crystallization, as long as can make powder its electric conductivity all can measure, and the conductivity result accuracy rate of measuring is higher.That testing cost is minimum again, needed sample even can be controlled at a milligram rank, and owing to detecting completely to sample nondestructive, therefore sample can be used as other samples that detect gimmicks completely and uses after this kind of conductivity detection, does not need to purify or numerous and diverse operation such as separation again.Meanwhile, measure needed accessory volume very little, be easy to carry.Finally, when several samples need to be carried out electric conductivity comparison, the method is more applicable compared to additive method, because in additive method due to sample volume is excessive or solvent auxiliary agent add etc. situation, while comparing, be difficult to guarantee that other environmental parameters strictly remain unchanged except sample itself (such as the degree of scatter of powder in solvent etc.), but this method is quite different, as long as guarantee identical and the time is identical to two electrode applied pressures, just can guarantee to accomplish strict conformance to the influential surrounding enviroment parameter of testing result, therefore the credible result degree comparing is also higher.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the principle schematic that application the inventive method detects trace solid electric conductivity.
Embodiment
As shown in the figure, a kind of method that detects trace solid electric conductivity, comprises the following steps:
(a) with two metal spike electrodes 2, detection powder 6 being limited in to a height is 1 to 3 centimetre, in the teflon pressure-bearing pipe 5 of diameter between 3 to 5 millimeters;
(b) while measurement, exert pressure to the metal spike electrode 2 at two ends, discharge the air between powder, be squeezed into cylindrical;
(c) inner sample cylinder length can be measured by survey instrument, and record overall electrical resistance by multimeter, this value deducts electrode resistance value and is the cylindrical resistance value of sample;
(d) calculate conductivity, sample right cylinder resistance value can draw its volume conductance divided by its volume;
(e) after having measured, extract metal spike electrode 2 from pressure-bearing pipe two ends, pressure-bearing pipe two is all openings, and sample is therefrom ejected with hard spicule.
The described teflon pressure-bearing of step (a) pipe adds stainless steel sleeve cylinder 4 outward, and its object is, prevents that on pressure-bearing pipe, static exerts an influence to result.After measurement completes, because properties of samples is without any variation, the sample of taking-up still can be used for other Performance Detection link.Sample requirement is minimum, and can not cause the waste of sample.
On the described metal spike of step (a) electrode, the binding post 1 in order to contact resistance measuring equipment is all set.
Disclosed is above only the specific embodiment of this patent, but this patent is not limited thereto, and for the person of ordinary skill of the art, under the premise without departing from the principles of the invention, the distortion of making should be considered as belonging to protection domain of the present invention.
Claims (3)
1. a method that detects trace solid electric conductivity, is characterized in that, comprises the following steps:
(a) detecting powder (6) with two metal spike electrodes (2), to be limited in a height be 1 to 3 centimetre, in the teflon pressure-bearing pipe (5) of diameter between 3 to 5 millimeters;
(b) while measurement, exert pressure to the metal spike electrode (2) at two ends, discharge the air between powder, be squeezed into cylindrical;
(c) inner sample cylinder length can be measured by survey instrument, and record overall electrical resistance by multimeter, this value deducts electrode resistance value and is the cylindrical resistance value of sample;
(d) calculate conductivity, sample right cylinder resistance value can draw its volume conductance divided by its volume;
(e) after having measured, extract metal spike electrode (2) from pressure-bearing pipe two ends, sample is therefrom ejected with hard spicule.
2. a kind of method that detects trace solid electric conductivity according to claim 1, is characterized in that: the described teflon pressure-bearing of step (a) pipe adds stainless steel sleeve cylinder (4) outward.
3. a kind of method that detects trace solid electric conductivity according to claim 1, is characterized in that: on the described metal spike of step (a) electrode, the binding post (1) in order to contact resistance measuring equipment is all set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210517060.1A CN103852642A (en) | 2012-12-06 | 2012-12-06 | Method for detecting electrical conductivity of small number of solids |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210517060.1A CN103852642A (en) | 2012-12-06 | 2012-12-06 | Method for detecting electrical conductivity of small number of solids |
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| CN103852642A true CN103852642A (en) | 2014-06-11 |
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| CN201210517060.1A Pending CN103852642A (en) | 2012-12-06 | 2012-12-06 | Method for detecting electrical conductivity of small number of solids |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974199A (en) * | 2016-07-15 | 2016-09-28 | 中国科学院福建物质结构研究所 | Solid powder DC resistance and AC impedance test apparatus |
| CN106680588A (en) * | 2016-11-14 | 2017-05-17 | 南京大学（苏州）高新技术研究院 | Pressure intensity-controllable solid power electric conductivity test device |
| CN107421993A (en) * | 2017-05-27 | 2017-12-01 | 双登集团股份有限公司 | Powdered electrode material electric conductivity simulating test device |
| JP7411501B2 (en) | 2020-05-13 | 2024-01-11 | 日東精工アナリテック株式会社 | Powder resistivity measuring device and resistivity measuring method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2135157Y (en) * | 1992-08-07 | 1993-06-02 | 高瑞林 | Automatic powder resistivity measuring apparatus |
| CN2141899Y (en) * | 1992-05-16 | 1993-09-08 | 中国科学院山西煤炭化学研究所 | Powder mass resistivity measurer |
| US5469069A (en) * | 1993-03-19 | 1995-11-21 | Chang; On-Kok | Method and apparatus for measuring resistivity of geometrically undefined materials |
| CN101000319A (en) * | 2006-10-13 | 2007-07-18 | 深圳大学 | Method and device for investingating resistivity of powder metal |
| CN101315343A (en) * | 2007-05-29 | 2008-12-03 | 上海比亚迪有限公司 | Apparatus and method for measuring volume resistivity of powder |
| CN101324538A (en) * | 2007-06-14 | 2008-12-17 | 深圳市比克电池有限公司 | Method for measuring powder body material electric conductivity and electric conductivity measuring apparatus suitable for the method |
| CN101706529A (en) * | 2009-10-09 | 2010-05-12 | 上海微纳科技有限公司 | Device and method for testing conductivity of solid powder material |
| CN202196122U (en) * | 2011-08-11 | 2012-04-18 | 天津量诺科技发展有限公司 | Module for testing powder material conductivity |
| CN102680793A (en) * | 2011-03-08 | 2012-09-19 | 上海尧顺电子科技有限公司 | Powder resistivity testing device |
| CN202443068U (en) * | 2012-02-13 | 2012-09-19 | 安徽亚兰德新能源材料股份有限公司 | Static impedance tester for positive powder materials of cobalt-overlapped type spherical nickel hydroxide |
-
2012
- 2012-12-06 CN CN201210517060.1A patent/CN103852642A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2141899Y (en) * | 1992-05-16 | 1993-09-08 | 中国科学院山西煤炭化学研究所 | Powder mass resistivity measurer |
| CN2135157Y (en) * | 1992-08-07 | 1993-06-02 | 高瑞林 | Automatic powder resistivity measuring apparatus |
| US5469069A (en) * | 1993-03-19 | 1995-11-21 | Chang; On-Kok | Method and apparatus for measuring resistivity of geometrically undefined materials |
| CN101000319A (en) * | 2006-10-13 | 2007-07-18 | 深圳大学 | Method and device for investingating resistivity of powder metal |
| CN101315343A (en) * | 2007-05-29 | 2008-12-03 | 上海比亚迪有限公司 | Apparatus and method for measuring volume resistivity of powder |
| CN101324538A (en) * | 2007-06-14 | 2008-12-17 | 深圳市比克电池有限公司 | Method for measuring powder body material electric conductivity and electric conductivity measuring apparatus suitable for the method |
| CN101706529A (en) * | 2009-10-09 | 2010-05-12 | 上海微纳科技有限公司 | Device and method for testing conductivity of solid powder material |
| CN102680793A (en) * | 2011-03-08 | 2012-09-19 | 上海尧顺电子科技有限公司 | Powder resistivity testing device |
| CN202196122U (en) * | 2011-08-11 | 2012-04-18 | 天津量诺科技发展有限公司 | Module for testing powder material conductivity |
| CN202443068U (en) * | 2012-02-13 | 2012-09-19 | 安徽亚兰德新能源材料股份有限公司 | Static impedance tester for positive powder materials of cobalt-overlapped type spherical nickel hydroxide |
Non-Patent Citations (1)
| Title |
|---|
| 徐丽金: "半导体氧化锡粉末直流电阻的测定", 《应用化学》, vol. 11, no. 6, 31 December 1994 (1994-12-31), pages 45 - 48 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974199A (en) * | 2016-07-15 | 2016-09-28 | 中国科学院福建物质结构研究所 | Solid powder DC resistance and AC impedance test apparatus |
| CN106680588A (en) * | 2016-11-14 | 2017-05-17 | 南京大学（苏州）高新技术研究院 | Pressure intensity-controllable solid power electric conductivity test device |
| CN107421993A (en) * | 2017-05-27 | 2017-12-01 | 双登集团股份有限公司 | Powdered electrode material electric conductivity simulating test device |
| JP7411501B2 (en) | 2020-05-13 | 2024-01-11 | 日東精工アナリテック株式会社 | Powder resistivity measuring device and resistivity measuring method |
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Application publication date: 20140611 |