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

Abstract

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.

Inventors:
 [1];  [1];  [1];  [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
875010
Patent Number(s):
6511943
Assignee:
The Regents of the University of California (Los Alamos, NM) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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/

Citation Formats

Serquis, Adriana C., Zhu, Yuntian T., Mueller, Frederick M., Peterson, Dean E., and Liao, Xiao Zhou. Synthesis of magnesium diboride by magnesium vapor infiltration process (MVIP). United States: N. p., 2003. Web.
Serquis, Adriana C., Zhu, Yuntian T., Mueller, Frederick M., Peterson, Dean E., & Liao, Xiao Zhou. Synthesis of magnesium diboride by magnesium vapor infiltration process (MVIP). United States.
Serquis, Adriana C., Zhu, Yuntian T., Mueller, Frederick M., Peterson, Dean E., and Liao, Xiao Zhou. Wed . "Synthesis of magnesium diboride by magnesium vapor infiltration process (MVIP)". United States. https://www.osti.gov/servlets/purl/875010.
@article{osti_875010,
title = {Synthesis of magnesium diboride by magnesium vapor infiltration process (MVIP)},
author = {Serquis, Adriana C. and Zhu, Yuntian T. and Mueller, Frederick M. and Peterson, Dean E. and Liao, Xiao Zhou},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {1}
}

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