YBa₂Cu₃O _x superconducting nanorods

Abstract

Herein, we report the synthesis of YBa 2 Cu 3 O x superconducting nanorods performed by solution chemistry. Initially, a mixture of fine-grained coprecipitated powder was obtained and subsequently converted to YBa 2 Cu 3 O x nanorods by heating to 1223 K in oxygen for 12 h. The nanorods are superconducting without the need for any further sintering or oxygenation, thereby providing an avenue for direct application to substrates at room temperature or direct use as formed nanorods. A critical superconducting transition temperature T c of about 92 K was achieved at a critical magnetic field of 10 Oe.

Extended Cases of Laboratory Generated Gravitomagnetic Field Measurement Devices

“…New developments in nanomaterial processing of superconductors [2] [3] have led to the discovery of nano-tubular superconductors Rieken and Bhargava et al which have a Tc at 92 K. A uniqueness of the nano-tubular and other geometric structures of high temperature superconducting (HTSC) makes for a practical wire form without using the melt texturing techniques which make for brittle Figure 1. Gravitational force generation coil from Forward 1962 [1] with an inspiralling mass current, with a vector potential P, creating gravitomagnetic field G, which is additive in the center.…”

“…The elimination of this requirement makes room temperature forming and application of HTSC materials practical. The process has been demonstrated to be a low-cost and mass production method of superconductors which is scalable and without vacuum or cleanroom requirements, Rieken and Bhargava et al [2]. These developments have led to the commercialization by True 2 Materials PTE., LTD (T2M) in Singapore, of a new HTSC wire using standard wire making practices.…”

“…For the nanowire assumed in Ref. [2], J = 250 MA/m 2 . Cross sectional area A c = 7.854 × 10 −9 m 2 as given in Equation (13).…”

“…When Forward [1] first proposed a gravitomagnetic toroid for unbalanced gravitational force production in 1962 any experimental realization was quite impractical. However recent advances in high temperature superconducting (HTSC) nanorod wire (nanowire) technology, described recently by Rieken and Bhargava et al [2], have enabled a new class of superconducting magnetic energy sto-Journal of High Energy Physics, Gravitation and Cosmology rage (SMES) devices operated at current densities and magnetic field strengths sufficient to develop measurable gravitomagnetic fields, while still maintaining mechanical integrity. In the present study, it is proposed that an experimental SMES toroid configuration uses a set of standard accelerometers to measure acceleration fields along the axis of symmetry of a toroidal coil, thus providing experimental confirmation of the additive nature of the gravitomagnetic fields, as well as the production of a linear component of the overall acceleration field.…”

“…which is depicted inFigure 8. Where in this case [11]: soft iron) then L = 3.0 × 10 13 H. Assuming a current I = 1.96 A to keep below the critical current density of the material of Reference[2] then from Equation (31) the contained energy of the coil will be:…”