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Synthesis of magnesium diboride by magnesium vapor infiltration process (MVIP)

Patent ·
OSTI ID:875010
 [1];  [1];  [1];  [1];  [1]
  1. Los Alamos, NM
+ Show Author Affiliations
A process of preparing superconducting magnesium diboride powder by heating an admixture of solid magnesium and amorphous boron powder or pellet under an inert atmosphere in a Mg:B ratio of greater than about 0.6:1 at temperatures and for time sufficient to form said superconducting magnesium diboride. The process can further include exposure to residual oxygen at high synthesis temperatures followed by slow cooling. In the cooling process oxygen atoms dissolved into MgB.sub.2 segregated to form nanometer-sized coherent Mg(B,O) precipitates in the MgB.sub.2 matrix, which can act as flux pinning centers.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM
DOE Contract Number:
W-7405-ENG-36
Assignee:
The Regents of the University of California (Los Alamos, NM)
Patent Number(s):
US 6511943
OSTI ID:
875010
Country of Publication:
United States
Language:
English

References (9)

Superconductivity in Dense MgB 2 Wires journal March 2001
Superconducting magnesium diboride films with Tc≈24 K grown by pulsed laser deposition with in situ anneal journal May 2001
High critical current density and enhanced irreversibility field in superconducting MgB2 thin films journal May 2001
Improved superconducting properties of MgB2 journal October 2001
Superconductivity at 39 K in magnesium diboride journal March 2001
Synthesis and processing of MgB2 powders and wires journal May 2001
Synthesis and characterization of MgB2 superconductor journal November 2001
Effect of lattice strain and defects on the superconductivity of MgB2 journal December 2001
Boron Isotope Effect in Superconducting MgB 2 journal February 2001

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Related Subjects

/505/252/420/423/
061
admixture
amorphous
amorphous boron
atmosphere
atoms
boron
boron powder
centers
coherent
cooling
diboride
dissolved
exposure
flux
followed
form
heating
inert
inert atmosphere
infiltration
infiltration process
magnesium
matrix
mgb
mgbo
mgbsub2
mvip
nanometer-sized
oxygen
pellet
pinning
powder
precipitates
preparing
process
ratio
residual
segregated
slow
solid
sufficient
superconducting
synthesis
temperatures
time
vapor