CN103913635B - System for measuring surface resistivity of material on high-temperature condition - Google Patents
System for measuring surface resistivity of material on high-temperature condition Download PDFInfo
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- CN103913635B CN103913635B CN201410138115.7A CN201410138115A CN103913635B CN 103913635 B CN103913635 B CN 103913635B CN 201410138115 A CN201410138115 A CN 201410138115A CN 103913635 B CN103913635 B CN 103913635B
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Abstract
The invention discloses a system for measuring the surface resistivity of a material on a high-temperature condition. The system is composed of a positioning and transmitting system and a resistance measurement system. A high-temperature environment is achieved through a high-temperature heating furnace. An infrared thermometer is used for monitoring the surface temperature change of the material. A measurement electrode resistant to the high temperature is designed according to a double-electrode method. Each high-temperature electrode is a graphite electrode resistant to the high temperature and each high-temperature transmission line is a graphite line. In the measuring process, the material to be measured is firstly heated to a certain temperature in the high-temperature heating furnace, the material is then rapidly taken out and placed on a high-temperature-resistant insulation base, and the surface resistivity of the material is continuously monitored in the naturally cooling process on the high-temperature condition. The system is simple in overall structure and convenient to operate and control. After the material is heated, the surface resistivity of the material is measured outside the high-temperature heating furnace; due to the fact that the high-temperature-resistant graphite electrodes are in contact with the high-temperature material and the graphite lines are connected with the thermometer, influence on the system by the high temperature is avoided, and the operability of measurement is guaranteed.
Description
Technical field
The present invention relates to the test macro of material surface resistivity under a kind of hot conditions, especially aircraft surface heat-barrier material surface resistivity in high temperature environments.
Background technology
Because the static discharge that a variety of causes produces may cause the blast on fire of its fuel tank when aircraft aloft flies, the radiation that static discharge produces also can cause interference to the communication of aircraft and navigational system, and this has certain antistatic performance with regard to needing the surfacing of aircraft.Meanwhile, aircraft aloft in high speed motions can because of with air friction and produce very high heat, especially under the environment of near space, aircraft surface temperature can reach thousands of degree, and aircraft surface can cover thermofin for this reason.For thermofin antistatic performance how, whether antistatic performance especially under the high temperature conditions up to standard, and this weighs with regard to needing an important parameter, i.e. the surface resistivity of material.But the surface resistivity of material can change along with the change of temperature, therefore, the surface resistivity of material under the surface resistivity of material and hot conditions is measured particularly important.
At present, the test for the surface resistivity of material under normal-temperature has the method for testing such as three-electrode method, two-probe method.But, for the test of material surface resistivity under hot conditions, due to the restriction by heating condition and testing tool itself, also there is no good method of testing now.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of structure simple, operate practical, measurement result material surface resistivity test macro under hot conditions accurately.
For solving the problems of the technologies described above, the technical solution used in the present invention is: material surface resistivity test macro under a kind of hot conditions, and its gordian technique is: comprise location and transmission system and resistance test system;
Described location and transmission system comprise insulator foot, described insulator foot are placed with test sample, be provided with two high temperature electrodes, be provided with weight above each high temperature electrode above described test sample;
Described resistance test system comprises electrostatic resistance meter, and described high temperature electrode connects the X-over of electrostatic resistance meter through high temperature transmission line.
Preferably, described high temperature electrode is graphite electrode, and its shape is strip.
Preferred further, described electrode length is 12cm, and height and width are 1cm.
Preferably, described insulator foot forms by high temperature brick with for increasing the polyfluortetraethylene plate of insulating property, described polyfluortetraethylene plate is arranged at below, and described high temperature brick is located at above polyfluortetraethylene plate, and described high temperature brick arranges two pieces and separated by a distance between two pieces; Described test specimens product are positioned on high temperature brick.
Preferably, described weight is steel cylinder, and this right cylinder is provided with one and high temperature electrode groove of the same size, described high temperature electrode is stuck in groove.
Preferably, described high temperature transmission line is graphite line.
Also comprise for measuring the infrared thermometer of test sample temperature and/or the high temperature furnace for heating test sample.
The beneficial effect adopting technique scheme to produce is:
1, one-piece construction of the present invention is simple, and convenient operation and control.After heating materials, at high temperature furnace external testing material surface resistivity, contacted with high-temperature material by resistant to elevated temperatures graphite electrode, adopt graphite line to be connected with testing tool simultaneously, avoid the impact of high temperature on test macro, ensure that the operability of measurement.
2, the present invention adopts infrared thermometer to monitor material surface temperature, utilizes weight to push down the contact of electrode increase electrode and material simultaneously, ensure that the accuracy of measurement result.
3, the present invention can flexibly for the test of various insulating material surface resistivity under the high temperature conditions.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
See accompanying drawing 1, the present invention is by locate and transmission system and normal temperature resistance test macro form.The instruments such as the high temperature furnace that the present invention relates to, infrared thermometer and electrostatic resistance meter all adopt existing commercially available prod.Wherein resistance test system is made up of X-over and ACL800 surface resistance tester.
The heating-up temperature of high temperature furnace can reach 1000 DEG C; High temperature transmission line adopts graphite line to make, and length is 1m, guarantees that high temperature does not pass to testing tool; High temperature electrode adopts graphite material to make, and make long strip type, length is 12cm, and height and width are 1cm; Pressing weight steel is made right cylinder, diameter 10cm, high 10cm, digs out the groove that a size is consistent with electrode, electrode is stuck in groove just bottom it; Insulator foot is made up of high temperature brick and polyfluortetraethylene plate, two pieces of high temperature bricks are placed on polyfluortetraethylene plate, certain distance is kept between two pieces of high temperature bricks, but material can be placed on brick, ensure like this and the resistance to elevated temperatures of the insulator foot of surveyed material and its high insulating property; X-over is used for connecting high temperature transmission line and electrostatic resistance test instrument, guarantees convenient test.
During test, detected materials is heated half an hour in high temperature furnace, guarantee that material is fully heated, and be heated to assigned temperature; Then take out material rapidly, material is placed on the high temperature brick of the insulator foot placed in advance; Graphite electrode is placed on the edge of insulating material, utilize weight to push down graphite electrode, groove blocks electrode, and graphite transmission line connecting test electrode is also connected to surface resistance tester by X-over; Utilize infrared thermometer to monitor the temperature of material surface simultaneously, in its natural cooling process, monitor the surface resistivity of material under condition of different temperatures continuously.
Present invention achieves under the high temperature conditions to the test of material surface resistivity, utilize high-temperature heater by heating materials to assigned temperature, infrared thermometer is utilized to monitor material surface temperature variation, resistant to elevated temperatures graphite test electrode is designed according to two-probe method, use the weight of band groove that electrode is contacted fully with material surface, be provided with groove bottom described weight, groove and electrode in the same size, electrode is stuck in groove just.Adopt graphite line as high temperature transmission line.During test, first subject material is heated to certain temperature in high temperature furnace, then takes out material rapidly, be placed on high-temperature insulation base, in its natural cooling process, monitor material surface resistivity under the high temperature conditions continuously, utilize infrared thermometer to monitor material surface temperature simultaneously.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a material surface resistivity test macro under hot conditions, is characterized in that: comprise location and transmission system and resistance test system;
Described location and transmission system comprise insulator foot, described insulator foot are placed with test sample, be provided with two high temperature electrodes, be provided with weight above each high temperature electrode above described test sample;
Described resistance test system comprises electrostatic resistance meter, and described high temperature electrode connects the X-over of electrostatic resistance meter through high temperature transmission line.
2. material surface resistivity test macro under hot conditions according to claim 1, is characterized in that: described high temperature electrode is graphite electrode, and its shape is strip.
3. material surface resistivity test macro under hot conditions according to claim 2, is characterized in that: described electrode length is 12cm, and height and width are 1cm.
4. material surface resistivity test macro under hot conditions according to claim 1, it is characterized in that: described insulator foot forms by high temperature brick with for increasing the polyfluortetraethylene plate of insulating property, described polyfluortetraethylene plate is arranged at below, described high temperature brick is located at above polyfluortetraethylene plate, and described high temperature brick arranges two pieces and separated by a distance between two pieces; Described test specimens product are positioned on high temperature brick.
5. material surface resistivity test macro under hot conditions according to claim 1, is characterized in that: described weight is steel cylinder, and this right cylinder is provided with one and high temperature electrode groove of the same size, described high temperature electrode is stuck in groove.
6. material surface resistivity test macro under hot conditions according to claim 1, is characterized in that: described high temperature transmission line is graphite line.
7. the test macro of material surface resistivity under the hot conditions according to claim 1-6, is characterized in that: also comprise for measuring the infrared thermometer of test sample temperature and/or the high temperature furnace for heating test sample.
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Families Citing this family (8)
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CN104166049B (en) * | 2014-08-20 | 2016-08-17 | 太原理工大学 | A kind of soil resistivity test device of insulating materials |
CN105486926B (en) * | 2016-01-29 | 2018-03-27 | 哈尔滨理工大学 | Strip insulating materials surface resistivity tests three-electrode system |
CN106771619B (en) * | 2016-12-26 | 2020-02-14 | 上海集成电路研发中心有限公司 | High-precision temperature control resistance testing system |
JP6957099B2 (en) * | 2017-09-05 | 2021-11-02 | 住友重機械工業株式会社 | Laser annealing device and sheet resistance calculation device |
CN107907746B (en) * | 2017-10-25 | 2020-03-20 | 营口康辉石化有限公司 | Method for testing polymer melt resistivity |
CN109188086B (en) * | 2018-09-19 | 2021-01-15 | 许昌学院 | Method for testing influence of temperature on conductivity of space dielectric material |
CN109655666A (en) * | 2018-12-05 | 2019-04-19 | 深圳市飞荣达科技股份有限公司 | Sheet resistance test fixture and test method |
CN112051452B (en) * | 2020-07-27 | 2023-04-28 | 山东天岳先进科技股份有限公司 | High-precision graphite crucible resistivity testing device and method |
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CN101639501A (en) * | 2009-05-15 | 2010-02-03 | 西安超码科技有限公司 | Direct heating type testing method of high temperature resistance of carbon/carbon heating elements |
CN101968511A (en) * | 2010-09-27 | 2011-02-09 | 成都理工大学 | Small electrode experiment device for measuring resistivity of mineral and solid insulating material |
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