Microstructural, thermal, and electrical properties of Bi_1.7V_0.3Sr₂Ca₂Cu₃O_x glass‐ceramic superconductor

Abstract

A glass-ceramic Bi 1.7 V 0.3 Sr 2 Ca 2 Cu 3 O x superconductor was prepared by the melt-quenching method. The compound was characterized by scanning electron microscopy, x-ray diffraction, differential thermal analysis, current-voltage characteristics, transport resistance measurements, and Hall effect measurements. Two main phases (BSCCO 2212 and 2223) were observed in the x-ray data and the values of the lattice parameters quite agree with the known values for 2212 and 2223 phases. The glass transition temperature was found to be 426 °C while the activation energy for crystallization of glass has been found to be E a = 370.5 kJ / mol. This result indicates that the substitution of vanadium increased the activation energy for the BSCCO system. An offset T c of 80 K was measured and the onset T c was 100 K. The Hall resistivity ρ H was found to be almost fieldindependent at the normal state. A negative Hall coefficient was observed and no sign reversal of ρ H or R H could be noticed. The mobility and carrier density at different temperatures in the range 140-300 K under different applied magnetic fields up to 1.4 T were also measured and the results are discussed.

Crystallization kinetic studies on Bi1.75Pb0.25Sr2Ca2Cu3-xSnxOδ glass-ceramic by using non-isothermal technique

“…Since the first report on new high T c superconducting BiSrCaCuO ceramics by Maeda et al [1], many attempts have been done on the effect of the doping or substitution by different rare earth elements on the electrical properties, magnetic properties and thermal characterizations for the high-T c superconductors [1][2][3][4][5][6][7][8][9]. Study of the thermal and structural properties [5][6][7][8][9][10][11][12][13][14] of BiSrCaCuO (BSCCO) glass ceramics is important to understand the nucleation and crystal growth mechanism which is essential to obtain high quality glasses for technological applications.…”

“…Study of the thermal and structural properties [5][6][7][8][9][10][11][12][13][14] of BiSrCaCuO (BSCCO) glass ceramics is important to understand the nucleation and crystal growth mechanism which is essential to obtain high quality glasses for technological applications. Many works have reported the glass thermal properties studied by isothermal and non-isothermal methods [10][11][12][13][14].…”

Experimental and theoretical approaches on thermal and structural properties of Zn doped BSCCO glass ceramics

“…Some of those studies included works with partially substituted Zn-Ca BSCCO systems produced by solid state reaction method [10][11][12][13]. The effect of Zn doping on electrical and magnetic properties of the BSCCO system has been investigated by Mohamed et al [14].…”