Application,and,prospect,new,s business, insurance Application and prospect of new superconductor magnesium dib
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It is byfar the highest critical temperature, nature particularly stable metalcompounds, for developing low-cost high-performance superconducting materialopens up new roads.Previously identified superconducting materials areeither with extremely low critical temperature or complex ingredients and expensive,or the capability to carry the current strength is small. If you wantlarge-scale applications, such as manufacturing superconducting transmissionlines, these materials are not very economical and practical.Scientists say that according to the ratio of 1 to2 to mix with the 99.9% magnesium powder and 99% amorphous boron powder, pressinginto pellets and heated at high pressure nitrogen to obtain magnesium diboride.It was found that, when cooled to 39K, magnesium diboride showing significant superconductingcharacteristics.In the current developed high-temperaturesuperconducting material, the highest critical temperature can up to 160K, ismuch higher than magnesium diborides 39K. But metal powder supplier think that boron powder and magnesium powder with low price, magnesiumdiboride also easy to prepare, it is a common inexpensive chemical, with stablenature, simple ingredients, these benefits are complex and expensivecopper-oxide superconducting materials can not compare. If can through themethod of doping a small amount of impurities to significantly increase itscritical temperature, magnesium diboride with great potential to become alow-cost, practical new superconducting material.After the name of superconductor suggests is withoutenergy dissipation through current conductor, it is due to a large number ofunpaired electrons condense into a "lockstep" coherent state, itsmovement from the lattice scattering. In 1911, after the Dutch scientists foundthe mercury superconductivity, people have been expecting to find roomtemperature superconductors. End of 1986, the Swiss Reynolds and Miller in the neverthought original oxide found transition temperature was above 30Ksuperconductor, set off a pair of high-temperature superconductivity chase inthe world. Currently oxide superconductors transition temperature was as highas 130K or more, in some aspects of the application has already been felt. However,due to its own characteristics, the oxide superconductor application in manyareas is restricted.Early March of 2001, Japanese scientists reportedmagnesium diboride material in around 39 K will exhibit superconductingproperties. This discovery quickly sparked worldwide research boom. Researches onthe nature of magnesium diboride superconductor is progressing very quickly, theunderstanding of the magnesium diboride superconductors mechanism also deepening.The opportunities of magnesium diboridesuperconductors in the application will more exciting. First, thesuperconductor at a temperature of about 20 K, 8 times of the Earth's magneticfield can carry large superconducting currents and with very low energyconsumption. Secondly, magnesium diboride material prices are very low, and mucheasier to mechanical workout than ceramic characteristics oxidehigh-temperature superconductors. In addition, the superconducting coherencelength of magnesium diboride is longer, easy to prepare a superconductingquantum interference device for the detection of weak electromagnetic signals,in the earth exploration, medical equipment, environmental and military hasbroad application prospects.Source:http://www.mhcmp.com
Application,and,prospect,new,s