GRAVITATION SHIELDING POSSIBLE
From the abstract in the paper by: E.E. Podkletnov (Moscow Chem. Scientific. Ctr.), "Weak Gravitation Shielding Properties of Composite Bulk YBa2Cu3O7-x Superconductor Below 70íK under E.M. Field," Univ. Cincinnati Engineering, report # MSU-chem 95, abstract cond-mat/9701074; 19 pages, 12 refs, 7 figs, 1 table.
A high-temperature YBa2Cu3O7-x bulk ceramic superconductor with composite structure has revealed weak shielding properties against gravitational force in the state of levitation at temperature below 70 K. A toroidal disk was prepared using conventional ceramic technology in combination with melt-texture growth. Two solenoids were placed around the disk in order to initiate the current inside it and also to provide rotation about its central axis. Samples placed over the rotating disk demonstrated a weight loss of 0.3 to 0.5%. When the rotation speed was slowly reduced by changing the current in the solenoids, the shielding effect became considerably higher and reached 1.9 to 2.1 % at maximum.
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Apr. 27, 1997.