Preparation of Ag-coated superconducting Bi2Sr2CaCu2Ox glass-ceramic fibers

Abstract

The Ag-coated superconducting Bi2 Sr2 CaCu2 Ox glass-ceramic fibers were successfully prepared. The glass fibers with a length of 50 cm, a width of 100–200 μm, and a thickness of about 20 μm were first drawn from glass plates with a thickness of 1 mm and then silver pastes were coated on the smooth surface of glass fibers. The Ag-coated glass fibers were converted into superconductors after annealing at temperatures of 820–860 °C. The main crystalline phase in the glass-ceramic fibers was the superconducting low Tc phase. The Ag-coated glass-ceramic fibers obtained by annealing at 840 °C for 5 h in air exhibited superconductivity with a Tc (zero)=70 K and a critical current density (60 K, zero magnetic field) of more than 40 A/cm2 .

Laser Patterning of Non-Linear Optical Bi2ZnB2O7 Crystal Lines in Glass

“…The crystallization of Bi2O3-based glasses has also received much attention, because some functional crystals containing Bi2O3 are formed through the crystallization. For instance, high-Tc Bi2O3-based copper superconducting glass-ceramics have been synthesized through the crystallization of glasses with Bi2O3 (Komatsu et al, 1988(Komatsu et al, , 1990. Nonlinear optical RExBi1-xBO3 crystals (RE: Gd and Sm) showing strong SHGs have been also synthesized from RE2O3-Bi2O3-B2O3 glasses (Honma et al, 2002;Ihara et al, 2004;Koshiba et al, 2007).…”