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

Patent ·
OSTI ID:875010
 [1];  [1];  [1];  [1];  [1]
  1. Los Alamos, NM
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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 (United States)
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
Improved superconducting properties of MgB2 journal October 2001
Boron Isotope Effect in Superconducting MgB 2 journal February 2001
Synthesis and characterization of MgB2 superconductor journal November 2001
High critical current density and enhanced irreversibility field in superconducting MgB2 thin films journal May 2001
Effect of lattice strain and defects on the superconductivity of MgB2 journal December 2001
Superconductivity at 39 K in magnesium diboride journal March 2001
Superconducting magnesium diboride films with Tc≈24 K grown by pulsed laser deposition with in situ anneal journal May 2001
Synthesis and processing of MgB2 powders and wires journal May 2001

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Related Subjects

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