Bi-2223 superconductors with silver additions are synthesized by sol-gel process. The effect of silver on the formation of Bi-2223 phase is studied. The addition of silver brings down the reaction temperature as well as annealing time for the formation of Bi-2223 phase. The presence of silver affects the Tc of the Bi-2212 phase. The heat treatment of silver added Bi-2223 samples above 1113 K show poor superconducting properties due to partial melting of Bi-2223 phase. © 1998 Chapman &amp; Hall.

Upadhyayula V Varadaraju

Department Of Chemistry

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Effect of silver on the formation of Bi2Sr2Ca2Cu3O10 (Bi-2223) superconductors by sol-gel process

Journal of Materials Science

The sol-gel process is employed to synthesize single-phase lead-doped Bi2Sr2Ca2Cu3O10 ((Bi,Pb)-2223) superconductors. The composition which can yield single-phase (Bi,Pb)-2223 compound is arrived at by varying the calcium and copper concentrations. Samples prepared with the composition Bi1.68 Pb0.32Sr1.75Ca1.8Cu2.8Oy result in the formation of phase pure compound. The mechanism of formation of this compound and the intermediate steps involved during the phase formation are established by X-ray diffraction (XRD) and differential thermal analytical (DTA) studies. It is found that (Bi,Pb)-2223 phase formation occurs through the reaction of (Bi,Pb)-2212 phase with Ca2CuO3 and CuO in the liquid phase obtained from the partial melting calcium rich Bi-2212 phase. The stability region for the (Bi,Pb)-2223 compound is identified as 1118 to 1138 K. Several incongruent melting reactions are identified from XRD and DTA studies during the decomposition of Bi-2223 compound. © 1996 Academic Press, Inc.

Journal of Solid State Chemistry

Synthesis of (BiPb)2Sr2Ca2Cu3Oy superconductors by the Sol-Gel process

Materials Letters

Role of silver on phase formation and texture development in Ag/BSCCO composites

Preparation and properties of YBa2Cu3Oy-Ag composites via 8-hydroxyquinoline coprecipitation

Journal of Materials Research

Phase evolution in silver-doped BiPbSrCaCuO(2223)/Ag superconducting composites

Superconductor Science and Technology

Ag-sheathed Bi(Pb)SrCaCuO superconducting tapes

Journal	Data powered by TypesetJournal of Materials Science
Publisher	Data powered by TypesetSpringer Netherlands
ISSN	00222461
Open Access	No