Superconductor comprising magnesium diboride and manufacturing method therefor
The present disclosure relates to a superconductor including magnesium diboride and a production method therefor. A superconductor having a high critical current density at a certain temperature and under a certain magnetic field may be obtained by doping magnesium diboride with liquid chloroform during the production of the superconductor.
1. A superconductor comprising: carbon-doped magnesium diboride; and chlorine atoms present in grains of the carbon-doped magnesium diboride, wherein the superconductor comprises 0.05 at. % to 0.11 at. % of chlorine atoms.
2. The superconductor of claim 1 , wherein the carbon-doped magnesium diboride comprises more than 0 wt. % and 2 wt. % or less of carbon atoms.
3. A method for producing the superconductor according to claim 1 , the method comprising:
mixing boron powder with a liquid chlorinated hydrocarbon compound to form an amorphous carbon layer on the surface of the boron powder;
mixing magnesium powder with the boron powder having the amorphous carbon layer formed thereon to produce mixture;
press shaping the mixture; and
sintering a product resulting from the press shaping,
wherein the liquid chlorinated hydrocarbon compound is mixed with the boron powder in an amount of 0.03 mL to 0.4 mL per mg of the boron powder.
4. The method of claim 3 , wherein the liquid chlorinated hydrocarbon compound is chloroform or carbon tetrachloride.
5. The method of claim 3 , wherein the mixing of magnesium powder comprises mixing the magnesium powder with the boron powder having the amorphous carbon layer formed thereon at a stoichiometric ratio.
6. The method of claim 3 , wherein the amorphous carbon layer has a thickness of 1 nm to 10 nm.
7. The method of claim 3 , wherein the sintering is performed at a temperature of 600° C. to 1,000° C.
8. The method of claim 3 , wherein the sintering is performed for 10 minutes to 10 hours.