Hot-extrusion processing of Bi-Sr-Ca-Cu-O super conducting oxide ceramics (2212 phase).

Processing of Bi–Sr–Ca–Cu–O glasses using platinum and alumina crucibles

Reactions with alumina and platinum crucibles were studied during the preparation of Bi2Sr2Ca1Cu2Oy “2212” glasses. In particular, reactions with Al2O3 are of interest since alumina is a potential substrate material in applications of this superconductor. Glasses processed using alumina crucibles were completely homogeneous and free of secondary phases although the material contained 2.26 at. %...

بررسی تاثیر سرب و زمان پخت برروی خواص ابررسانای سرامیکی Bi-Sr-Ca-Cu-O

Primary Phase Field of the Pb-Doped 2223 High-Tc Superconductor in the (Bi, Pb)-Sr-Ca-Cu-O System

Both liquidus and subsolidus phase equilibrium data are of central importance for applications of high temperature supercon-ductors in the (Bi, Pb)-Sr-Ca-Cu-O system, including material synthesis, melt processing and single crystal growth. The sub-solidus equilibria of the 110 K high-Tc Pb-doped 2223 ([Bi, Pb], Sr, Ca, Cu) phase and the location of the primary phase field (crystallization field...

NEW SUPERCONDUCTING OXIDES IN THE Bi-Sr-Ca-Cu-O SYSTEM : MAGNETIC MEASUREMENTS AND STRUCTURAL DETERMINATION

-Detailed neutron diffraction structure analysis of Bi2SrzCaCu20s is reported. The effects of Pb-substitution on BizSrzCaCuzOs and Bi2Sr2CuOs are discussed, and magnetization measurement results on the 110 K phase in the Bi-Sr-Ca-Cu-0 system are given. Since the discovery of high Tc superconductivity in the Bi-Sr-Ca-Cu-0 system [I], two superconducting phases have been unambiguously identified,...

Magnetic properties of magnetically textured Bi-2212 ceramics

Abstract: This paper aims at reporting magnetic properties of bulk polycrystalline Bi2Sr2Ca0.8Dy0.2Cu2O8-y samples textured under a magnetic field. The micro structure of these materials is highly anisotropic and exhibits particular features needed to be taken into account in order to interpret their magnetic and electrical properties. First the AC magnetic susceptibility χ = χ' jχ" has been me...