4-lead method has high measuremnt accuracy
Both manual recording and software acquisition data
Industrial sample can be stored in room temperature & durable
Sample has large current range
The superconducting phenomenon was discovered by Dutch physicist Heike Kamerlingh Onnes in 1911. After the successful development of strong magnetic materials and the discovery of the Josephson effect, especially with the discovery of new high critical temperature superconductors of the YBCO (YBa2Cu3O7) series and the BSCCO (Bi2Sr2Ca2Cu3O10) series, superconductivity theory and technology have developed rapidly in practical applications. Superconductive materials are now used in high-energy physics, electrical engineering, electronics, biomagnetics, aerospace, medical diagnostics and other fields.
LEAI-73 Apparatus of Measuring High Temperature Superconducting Critical Temperature is a specially designed experimental equipment for measuring the basic characteristics of superconductors. It has features:
1. The R-T relationship is measured at a certain current using the four-lead method. The critical temperature is determined based on either manual recording or software automatic acquisition.
2. The sample has a large current range, which enables to measure the characteristic curve of temperature increasing or decreasing at different currents and analyze the error caused by the dynamic temperature difference.
3. An industrial BSCCO wire material is used as the experimental sample, which is easy to store at room temperature and will not hydrolysis, so it is durable.
The LEAI-73 apparatus consists of an electric control unit, a low-temperature liquid nitrogen Dewar and an experimental probe bar, on which the sample is wound on. The objectives of conducting experiments using this system are following:
1. Learn liquid nitrogen cryogenic technology;
2. Measure the critical temperature of a BSCCO wire material and master the measurement method of resistance-temperature relationship;
3. Understand the basic properties of superconductors and master the basic methods for determining superconductor states.
The instruction manual contains comprehensive materials including experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.
|0 ~ 110 mA (continuously adjustable)|
Measurement of Sample Resistance
|resolution 0.1 milli-Ohm|
|Operating Temperature||77 K ~ 300 K|
|Temperature Measurement||resolution 0.1 K|
Liquid Nitrogen Container
|volume 3 liters, caliber 50 mm|
|Experimental Probe Bar||length 62 cm|
|Power Consumption||20 W|
|Main electric unit||1|
|Liquid nitrogen dewar||1|
|Superconductor sample||1 (wound on probe bar)|
|Serial data cable||1|
|USB to RS232 converting cable||1|
|Instruction manual (CD)||1|