Effect of silver additions on sintered Bi2Sr2CaCu2O8

Jones, Travis E.; McGinnis, W. C.; Jacobs, E. W.; Boss, R. D.; Thibado, P. M.; Briggs, J S; Glad, W. E.

doi:10.1016/0921-4534(92)90474-q

Cited by 14 publications

(23 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3 displays the rate of formation of Bi-2223 and Bi-2212 phases with respect to wt% of ZnO added BSCCO samples. Because of the calculating volume percentage characteristic peaks, it was used, for Bi-2223, the peaks of (0 0 2) and (0 0 1 0) with 2Â = 4.7 • and 24.04 • , and also for Bi-2212 at (0 0 2) and (0 0 8) with 2Â = 5.7 • and 23.22 • , respectively [28][29][30]. The volume fraction of the Bi-2223 and Bi-2212 phases in the samples was evaluated the relative intensities of the X-ray diffraction peaks using the following expression [31,32].…”

Section: Resultsmentioning

confidence: 99%

Effects of ZnO addition on mechanical properties of Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06O10 prepared by a wet technique

Karaca

Uzun

Kölemen

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Effects of ZnO addition on mechanical properties of Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06O10 prepared by a wet technique

Karaca

Uzun

Kölemen

et al. 2009

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…A quantitative measurement of the crystallographic orientation of a sample with relation to the axis can be obtained from the XRD measurement using the Lotgering factor [6], which can be calculated by (1) where is the summation of the XRD peak height intensities for all reflections divided by the summation of all intensities in the textured sample, and is the XRD peak height intensity ratio of a randomly oriented sample (Bi2212 precursor powder). The factor ranges from zero (randomly oriented sample) to one (totally oriented sample).…”

Section: Resultsmentioning

confidence: 99%

“…Other factors that define the interest in the phase Bi2212 are: relatively low melting point, stability and the tendency to have oriented grain growth [1]. The Bi2212 phase can be obtained controlling the thermal processing of the superconductor.…”

Section: Introductionmentioning

confidence: 99%

Phase Formation and Evolution, Texturing and Current Transport in Ag/Bi2212 PIT Monofilamentary Tapes

Rodrigues

Bigansolli

Cursino

et al. 2005

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

Superconducting tapes of ceramic material capable of transporting high current densities at high operation temperatures have been revealed as promising conductors in applied superconductivity. Tapes of Ag/Bi2212 present excellent characteristics and their processing techniques are being improved. This work presents a study on the formation of phases and the texturing behavior of Ag/Bi2212 monofilamentary tapes after several heat treatments with different cooling rates from 890 C to 830 C and silver doping, allowing an optimization of the heat treatment profiles aiming the obtainment of close to stoichiometric superconducting phases with high texturing. The tapes were fabricated using Bi2212 precursor powder and the powder-in-tube (PIT) method. The powder was pressed inside the Ag tube, and the set was mechanically deformed by swaging and rolling to the final thickness of 150 m. After heat treatment, the samples were characterized by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) equipped with Energy Dispersive Spectrometer (EDS). The results show the effect of each heat treatment profile on the microstructure and superconducting characteristics of the Ag/Bi2212 tapes, as well as they show the ways to obtain the best texturing of the samples aiming high current transport.

show abstract

“…The beneficial effects of silver doping include increased fracture toughness, 46 improved densification, 47 improved grain morphology and better grain-tograin connectivity and intergranular critical current, 48 better flux pinning, 49 enhanced texturing, [50][51][52] and accelerated phase formation. 53 Table V shows the effect of added excess silver (∼30 wt%) on melting temperatures of the above-described equilibrated four-phase compositions.…”

Section: (5) Effect Of Silver Additionmentioning

confidence: 98%

“…Other advantages include enhancement of textures, increased densification, and better grain-to-grain connectivity, all of which can promote increased critical current density. [46][47][48][49][50][51][52][53] …”

Section: (6) Processing Applicationsmentioning

confidence: 99%

Melting Equilibria of the Bi‐Sr‐Ca‐Cu‐O (BSCCO) System in Air: The Primary Crystallization Phase Field of the 2212 Phase and the Effect of Silver Addition

Wong‐Ng

Cook

Jiang

1998

Journal of the American Ceramic Society

View full text Add to dashboard Cite

The subsolidus and primary crystallization phase field of the ''2212'' (Bi:Sr:Ca:Cu) phase in the BSCCO system have been investigated. At 830°C, this phase was observed to be in equilibrium with ten phases. Sixteen four-phase equilibrium regions that surround the 2212 phase have been identified at this temperature. The melting events associated with these four-phase regions were studied with differential thermal analysis, quenching experiments, and wicking experiments, in which samples of the liquid for analysis were absorbed by capillary action. The melt compositions were obtained by using quantitative energy-dispersive X-ray spectrometry. The 2212 phase melts incongruently, beginning at ∼825°C. Its primary crystallization field encompasses a compositional range of 24-42 mol% BiO 1.5 , 7-33 mol% SrO, 2-27 mol% CaO, and 19-43 mol% CuO. The compositions of melts in equilibrium with the 2212 phase were mostly on the calcium-deficient side of the 2212 solid solution. An approximate polygonal model of the 2212 primary crystallization field has been presented. The addition of silver depresses the melting temperatures in the vicinity of the 2212 phase, from 4°C to 22°C. Silver entered the melt at a saturation level of 2-8 mol%. In the more copper-rich liquids, silver replaced some of the copper, which resulted in a shift of the 2212 crystallization field away from the copper oxide corner.

show abstract

Effect of silver additions on sintered Bi2Sr2CaCu2O8

Cited by 14 publications

References 13 publications

Effects of ZnO addition on mechanical properties of Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06O10 prepared by a wet technique

Effects of ZnO addition on mechanical properties of Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06O10 prepared by a wet technique

Phase Formation and Evolution, Texturing and Current Transport in Ag/Bi2212 PIT Monofilamentary Tapes

Melting Equilibria of the Bi‐Sr‐Ca‐Cu‐O (BSCCO) System in Air: The Primary Crystallization Phase Field of the 2212 Phase and the Effect of Silver Addition

Contact Info

Product

Resources

About