CN102866298A - Multichannel temperature gradient method RRR testing sample rod - Google Patents
Multichannel temperature gradient method RRR testing sample rod Download PDFInfo
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- CN102866298A CN102866298A CN2012103232444A CN201210323244A CN102866298A CN 102866298 A CN102866298 A CN 102866298A CN 2012103232444 A CN2012103232444 A CN 2012103232444A CN 201210323244 A CN201210323244 A CN 201210323244A CN 102866298 A CN102866298 A CN 102866298A
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Abstract
The invention discloses a multichannel temperature gradient method RRR testing sample rod which comprises a regulation rod, wherein the regulation rod is a long tube and is provided with a sealing screw cap and a sealing flange, a transition metal plate is vertically welded with one end of the regulation rod, the middle part of the transition metal plate is hollowed out, the transition metal plate is connected with an insulation sample table through a connecting rod, a Cernox thermometer is fixed on the insulation sample table, and a thermometer routing hole and twenty wiring terminals are also arranged on the insulation sample table. The multichannel temperature gradient method RRR testing sample rod disclosed by the invention has a simple structure and is easy in operation; and with the adoption of the multichannel temperature gradient method RRR testing sample rod, sample temperature is rapid and stable to control, and the accuracy and precision are high, thus greatly improving the working efficiency.
Description
Technical field
The present invention relates to the material properties test device, relate in particular to a kind of specimen holder that utilizes liquid helium top thermograde principle that material RRR value is tested.
Background technology
RRR is defined as the ratio of material room temperature resistance resistance with a little more than superconducting transition temperature the time, the expression residual resistivity.Concrete definition is the ratio of metallic resistance rate under 273K and a certain low temperature.Purity and the machining state of RRR value reflection metal, the RRR value shows that more greatly the purity of metal is higher, it also is an important parameter of copper substrate quality in the reflection strand, the size of its value directly has influence on the stability of working under the conductor low temperature, is the important parameter of calculating conductor engine sta bility margin and hot(test)-spot temperature.Usually, for the Nb3Sn superconducting line, the ratio of resistance when the measurement of its RRR value requires to obtain 273K and the 20K left and right sides, and for the NbTi superconducting line, the ratio of resistance when then requiring to obtain 273K and the 10K left and right sides is decided by the critical temperature of superconducting line.
International thermonuclear fusion experimental reactor (ITER) is the maximum international cooperative research project in the present whole world, and this plan will be researched and solved a nuclear fusion gordian technique difficult problem.In bearing international thermonuclear fusion experimental reactor (ITER) conductor design, production run, need to be to the Nb of ITER TF conductor and the use of PF conductor
3The RRR value of Sn and NbTi Superconducting Strand and copper cash is tested.As domestic ITER superconducting line performance test Notified body, we have born a large amount of superconducting line performance test tasks, and for these test assignments, we have set up a cover superconducting line performance testing device, comprise the Nb that ITER TF conductor and PF conductor use
3The RRR value proving installation of Sn and NbTi Superconducting Strand and copper cash.
Summary of the invention
The object of the invention is exactly in order to remedy the defective of prior art, a kind of simple and reliable multichannel temperature gradient method RRR specimen bar to be provided.
The present invention is achieved by the following technical solutions:
A kind of multichannel temperature gradient method RRR specimen bar, include adjusting lever, described adjusting lever is a long tube, sealing nut and seal flange are installed on the described adjusting lever, one end of described adjusting lever is vertically welded with the transition metal plate, described transition metal plate middle part hollows out, described transition metal plate is connected with the insulated sample platform by connecting link, be fixed with the Cernox thermometer on the described insulated sample platform, also be provided with thermometer cable hole and 20 binding posts, described Cernox thermometer adopts four wire connections, wherein two lines connect with constant current source one and link to each other, other two lines link to each other with a digital voltmeter, described binding post is distributed with 2 group of 4 row, one group is the voltage binding post, one group is the electric current binding post, one row of electric current binding post are followed successively by I5+, I4-, I3+, I2-, the I1+ binding post, one row of voltage binding post are followed successively by V5+, V4-, V3+, V2-, the V1+ binding post, another row of voltage binding post are followed successively by V5-, V4+, V3-, V2+, the V1-binding post, another row of electric current binding post are followed successively by I5-, I4+, I3-, I2+, the I1-binding post, passage is measured in one of each behavior of 4 row, measure passage for totally 5, there are 5 samples to be welded on respectively on each binding post of 5 passages, described I5+ is connected with the I4-binding post, I3+ is connected with the I2-binding post, I4+ is connected with the I3-binding post, I2+ is connected with the I1-binding post, each binding post and I1+ in the voltage binding post, the I5-binding post is all leaded at the back side of insulated sample plate, be respectively voltage lead and current feed, current feed is passed described adjusting lever link to each other with constant current source two, the voltage lead on same passage is passed described adjusting lever link to each other with a potential measuring instrument respectively.
Described multichannel temperature gradient method RRR specimen bar, it is characterized in that: described connecting link is 4.
Described multichannel temperature gradient method RRR specimen bar, it is characterized in that: described potential measuring instrument is nanovoltmeter.
As shown in Figure 4, in use, get 5 straight samples, be welded on respectively on each binding post of measuring passage, and guarantee that each 4 binding post measuring sample and this measurements passage on passage welds complete, at first, sample resistance under the certain electric current of test under room temperature or the mixture of ice and water, keep electric current inconvenience, adjusting lever is put into the liquid helium groove slowly, make sample temperature be controlled at required point by regulating sample stage and liquid helium face height, then the recording voltage value changes the measuring current direction of sample, size keeps inconvenience, record corresponding magnitude of voltage, eliminate thermoelectrical potential to the impact of test with this, the ratio of room temperature and low-temperature resistance is the sample RRR value that will obtain.
Advantage of the present invention is: the present invention has designed hyperchannel RRR specimen bar, and is simple in structure, easy to operate, sample temperature control fast and stable, and accuracy is high, and precision is high, has greatly improved work efficiency.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is insulated sample platform schematic diagram among the present invention.
Fig. 3 is insulated sample platform binding post back side arrangenent diagram.
Fig. 4 is application principle figure of the present invention.
Embodiment
Such as Fig. 1,2, shown in 3, a kind of multichannel temperature gradient method RRR specimen bar, include adjusting lever 1, described adjusting lever 1 is a long tube, sealing nut 2 and seal flange 3 are installed on the described adjusting lever 1, one end of described adjusting lever 1 is vertically welded with transition metal plate 4, described transition metal plate 4 middle parts hollow out, described transition metal plate 4 is connected with insulated sample platform 6 by connecting link 5, be fixed with Cernox thermometer 7 on the described insulated sample platform 6, also be provided with thermometer cable hole 8 and 20 binding posts 9, described Cernox thermometer 7 adopts four wire connections, wherein two lines connect with constant current source one and link to each other, other two lines link to each other with a digital voltmeter, described binding post 9 is distributed with 2 group of 4 row, one group is the voltage binding post, one group is the electric current binding post, one row of electric current binding post are followed successively by I5+, I4-, I3+, I2-, the I1+ binding post, one row of voltage binding post are followed successively by V5+, V4-, V3+, V2-, the V1+ binding post, another row of voltage binding post are followed successively by V5-, V4+, V3-, V2+, the V1-binding post, another row of electric current binding post are followed successively by I5-, I4+, I3-, I2+, the I1-binding post, passage is measured in one of each behavior of 4 row, measure passage for totally 5, there are 5 samples to be welded on respectively on each binding post of 5 passages, described I5+ is connected with the I4-binding post, I3+ is connected with the I2-binding post, I4+ is connected with the I3-binding post, I2+ is connected with the I1-binding post, each binding post and I1+ in the voltage binding post, the I5-binding post is all leaded at the back side of insulated sample plate, be respectively voltage lead and current feed, current feed is passed described adjusting lever 1 link to each other with constant current source 2 10, the voltage lead on same passage is passed described adjusting lever 1 link to each other with a potential measuring instrument respectively.
Described multichannel temperature gradient method RRR specimen bar, it is characterized in that: described connecting link 5 is 4.
Described multichannel temperature gradient method RRR specimen bar, it is characterized in that: described potential measuring instrument is nanovoltmeter.
Claims (3)
1. multichannel temperature gradient method RRR specimen bar, include adjusting lever, described adjusting lever is a long tube, sealing nut and seal flange are installed on the described adjusting lever, it is characterized in that: an end of described adjusting lever is vertically welded with the transition metal plate, described transition metal plate middle part hollows out, described transition metal plate is connected with the insulated sample platform by connecting link, be fixed with the Cernox thermometer on the described insulated sample platform, also be provided with thermometer cable hole and 20 binding posts, described Cernox thermometer adopts four wire connections, wherein two lines connect with constant current source one and link to each other, other two lines link to each other with a digital voltmeter, described binding post is distributed with 2 group of 4 row, one group is the voltage binding post, one group is the electric current binding post, one row of electric current binding post are followed successively by I5+, I4-, I3+, I2-, the I1+ binding post, one row of voltage binding post are followed successively by V5+, V4-, V3+, V2-, the V1+ binding post, another row of voltage binding post are followed successively by V5-, V4+, V3-, V2+, the V1-binding post, another row of electric current binding post are followed successively by I5-, I4+, I3-, I2+, the I1-binding post, passage is measured in one of each behavior of 4 row, measure passage for totally 5, there are 5 samples to be welded on respectively on each binding post of 5 passages, described I5+ is connected with the I4-binding post, I3+ is connected with the I2-binding post, I4+ is connected with the I3-binding post, I2+ is connected with the I1-binding post, each binding post and I1+ in the voltage binding post, the I5-binding post is all leaded at the back side of insulated sample plate, be respectively voltage lead and current feed, current feed is passed described adjusting lever link to each other with another constant current source two, two voltage leads on same passage are passed described adjusting lever link to each other with a potential measuring instrument respectively.
2. multichannel temperature gradient method RRR specimen bar according to claim 1, it is characterized in that: described connecting link is 4.
3. multichannel temperature gradient method RRR specimen bar according to claim 1, it is characterized in that: described potential measuring instrument is nanovoltmeter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103675454A (en) * | 2013-10-31 | 2014-03-26 | 成都金采科技有限公司 | Resistor testing apparatus |
| CN114325110A (en) * | 2021-12-30 | 2022-04-12 | 中国科学院合肥物质科学研究院 | Method for testing residual resistivity of composite material copper coating |
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| CN114325110A (en) * | 2021-12-30 | 2022-04-12 | 中国科学院合肥物质科学研究院 | Method for testing residual resistivity of composite material copper coating |
| CN114325110B (en) * | 2021-12-30 | 2023-08-15 | 中国科学院合肥物质科学研究院 | Test method for residual resistivity of copper coating of composite material |
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Effective date of registration: 20160606 Address after: 230088 innovation building, room 860, Wangjiang West Road, hi tech Zone, Anhui, Hefei, 816 Patentee after: Hefei Zhongke ion medical technology equipment Co., Ltd. Address before: 230031 Shushan Lake Road, Shushan District, Anhui, China, No. 350, No. Patentee before: Inst. of Plasma Physics, Chinese Academy of Sciences |