Characterization of superconducting BiSrCaCuO (2212 and 2223) from amorphous plates by splat quenching

Massalker, Y.; Sembira, A.N.; Baram, J.

doi:10.1016/0921-4534(93)90927-i

Cited by 4 publications

(1 citation statement)

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“…[8][9] Others have also studied crystallization of splat-quenched Bi-Sr-Ca-Cu-O.10"12 None of these studies has systematically investigated the effect of PQ2 on crystallization pathways of the amorphous material. [8][9] Others have also studied crystallization of splat-quenched Bi-Sr-Ca-Cu-O.10"12 None of these studies has systematically investigated the effect of PQ2 on crystallization pathways of the amorphous material.…”

Section: Introductionmentioning

confidence: 99%

Effects of oxygen partial pressure on the crystallization of amorphous Bi–Sr–Ca–Cu–O and Bi–Sr–Ca–Cu–O + Ag

Kramer¹,

Margulies²,

Arrasmith³

et al. 1994

J. Mater. Res.

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The temperatures and pathways of crystallization for amorphous Bi-Sr-Ca-Cu-O are strongly dependent on oxygen partial pressure {Po2), the oxidation state of the glass, and the presence of Ag. Reducing the POl from 1 to 0 bar lowers the onset of melting 100 °C, but does not change the onset of crystallization. Decreasing POl does inhibit the formation of (CaSr)CuO3 (Oil). Although Ag appears to be immiscible in B i -S r -C a -C u -0 , finely distributed Ag lowers the onset of melting by 20 to 35 °C, depending on POl. In oxygen-deficient glass, two exotherms are observed upon heating. The first exotherm at 460 °C is independent of PO2 and Ag and corresponds with the formation of Bi2Sr2Cu06 (Bi-2201). The second exotherm occurs at 486 °C with Ag or 500 °C without Ag. The onset temperature of the second exotherm does not change with POl, but the exotherm decreases in intensity with decreasing Po2. EXAFS indicates that in the as-quenched amorphous material, Cu is in a reduced state. Annealing the amorphous material in oxygen below the first exotherm (i.e., glass relaxation) increases the oxidation state of the Cu to that necessary for the formation of the Bi2Sr2CaCu2O8 (Bi-2212) without additional oxygen diffusion. This relaxation of the glass increases the crystallization temperature of the Bi-2201 to 500 °C. The crystallization sequence of Bi-2201 to Bi-2212 occurs at all POl 3= 0.1 bar, but the composition of the secondary phases changes in the unrelaxed glass. Relaxing the glass eliminates liquid formation at low temperatures, allowing for rapid formation of the Bi-2212 phase with minimal formation of secondary phases for 0.1 =£ POl =s 0.2 bar.

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Section: Introductionmentioning

confidence: 99%

Effects of oxygen partial pressure on the crystallization of amorphous Bi–Sr–Ca–Cu–O and Bi–Sr–Ca–Cu–O + Ag

Kramer¹,

Margulies²,

Arrasmith³

et al. 1994

J. Mater. Res.

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Improved Magneto-Optical Imaging Films Employing Surface Plasmon Resonance

Kochergin

Swinehart

2004

Magneto-Optical Imaging

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Nonlinear transport and other properties of semiconducting Bi₄Sr₃Ca₃Cu₄O_x + zAg₂O (z = 1-10 wt%) type multicomponent oxide glasses: precursors for high T_c superconductors

Bhattacharya

Chaudhuri

Komatsu

2000

Philosophical Magazine B

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Characterization of superconducting BiSrCaCuO (2212 and 2223) from amorphous plates by splat quenching

Cited by 4 publications

References 21 publications

Effects of oxygen partial pressure on the crystallization of amorphous Bi–Sr–Ca–Cu–O and Bi–Sr–Ca–Cu–O + Ag

Effects of oxygen partial pressure on the crystallization of amorphous Bi–Sr–Ca–Cu–O and Bi–Sr–Ca–Cu–O + Ag

Improved Magneto-Optical Imaging Films Employing Surface Plasmon Resonance

Nonlinear transport and other properties of semiconducting Bi₄Sr₃Ca₃Cu₄O_x + zAg₂O (z = 1-10 wt%) type multicomponent oxide glasses: precursors for high T_c superconductors

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Characterization of superconducting BiSrCaCuO (2212 and 2223) from amorphous plates by splat quenching

Cited by 4 publications

References 21 publications

Effects of oxygen partial pressure on the crystallization of amorphous Bi–Sr–Ca–Cu–O and Bi–Sr–Ca–Cu–O + Ag

Effects of oxygen partial pressure on the crystallization of amorphous Bi–Sr–Ca–Cu–O and Bi–Sr–Ca–Cu–O + Ag

Improved Magneto-Optical Imaging Films Employing Surface Plasmon Resonance

Nonlinear transport and other properties of semiconducting Bi4Sr3Ca3Cu4Ox + zAg2O (z = 1-10 wt%) type multicomponent oxide glasses: precursors for high Tc superconductors

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Nonlinear transport and other properties of semiconducting Bi₄Sr₃Ca₃Cu₄O_x + zAg₂O (z = 1-10 wt%) type multicomponent oxide glasses: precursors for high T_c superconductors