TY - JOUR
T1 - Magnetic, electrical, and microstructural properties of YBa2 Cu3 O7
T2 - A comparison of sol-gel, co-precipitated, and solid state processing routes
AU - Hayri, E. A.
AU - Greenblatt, M.
AU - Ramanujachary, K. V.
AU - Nagano, M.
AU - Oliver, J.
AU - Miceli, M. J.
AU - Gerhardt, R.
N1 - Funding Information:
The authors wish to thank Professor W. McLean of the Rutgers Physics Department for his assistance with the interpretation of the magnetic data. This work was supported by the National Science Foundation—Solid State Chemistry Grants DMR-84-04003, DMR-87-14072, and the National Science Foundation Materials Research Instrumentation Grant DMR-87-05620 (E.A.H., M.N., K.V.R., and M.G.), the Office of Naval Research (E.A.H., M.N., K.V.R., and M.G.), and the Center for Ceramic Engineering, Rutgers University (J.O., M.J.M., and R.G.).
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1989/10
Y1 - 1989/10
N2 - Samples of YBa2 Cu3 O7 were prepared by sol-gel, co-precipitation, and solid state processes. Sol-gel samples were prepared from a solution of yttrium, barium, and copper nitrates dissolved in ethylene glycol, co-precipitated samples were made by the amorphous citrate method, and solid state samples were prepared by conventional high temperature reaction of the appropriate metal oxides and carbonates. The sol-gel process was shown to yield superconducting samples of superior Meissner effect, critical current, and critical field. The co-precipitated samples contain impurities that affect the critical properties. The sol-gel and co-precipitated processes yield materials with well-formed, plate-like particles with a fairly uniform size of about 10 μm. The grains in the solid state sample are smaller but have a much wider distribution of sizes than the samples prepared by solution methods.
AB - Samples of YBa2 Cu3 O7 were prepared by sol-gel, co-precipitation, and solid state processes. Sol-gel samples were prepared from a solution of yttrium, barium, and copper nitrates dissolved in ethylene glycol, co-precipitated samples were made by the amorphous citrate method, and solid state samples were prepared by conventional high temperature reaction of the appropriate metal oxides and carbonates. The sol-gel process was shown to yield superconducting samples of superior Meissner effect, critical current, and critical field. The co-precipitated samples contain impurities that affect the critical properties. The sol-gel and co-precipitated processes yield materials with well-formed, plate-like particles with a fairly uniform size of about 10 μm. The grains in the solid state sample are smaller but have a much wider distribution of sizes than the samples prepared by solution methods.
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U2 - 10.1557/JMR.1989.1099
DO - 10.1557/JMR.1989.1099
M3 - Article
AN - SCOPUS:0024731611
SN - 0884-2914
VL - 4
SP - 1099
EP - 1102
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 5
ER -