Post by Bi0hazard on Sept 14, 2011 0:19:42 GMT -6
Weak gravitation shielding properties of composite bulkY Ba2Cu3O7− x superconductor below 70K under e.m. field
Full Primary Article @ www.scribd.com/doc/39624334/Podkletnov-1997
E.E. Podkletnov
Moscow Chemical Scientific Research Centre
113452 Moscow - Russia
ABSTRACT
A high-temperatureY B a2 C u3 O7− xbulk ceramic superconductor with composite structure has revealed weak shielding properties against gravitational force while in a levitating state at temperatures below 70K . A toroidal disk with an outer diameter of 275m m and a thickness of 10m m 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 to rotate the disk about its central axis. Samples placed over the rotating disk initially demonstrated a weight loss of 0.3-0.5%. When the rotation speed was slowly reduced by changing the current in the solenoids, the shielding effect became considerably higher and reached 1.9-2.1% at maximum. 74.72.-h High-Tc cuprates
Full Primary Article @ www.scribd.com/doc/39624334/Podkletnov-1997
E.E. Podkletnov
Moscow Chemical Scientific Research Centre
113452 Moscow - Russia
ABSTRACT
A high-temperatureY B a2 C u3 O7− xbulk ceramic superconductor with composite structure has revealed weak shielding properties against gravitational force while in a levitating state at temperatures below 70K . A toroidal disk with an outer diameter of 275m m and a thickness of 10m m 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 to rotate the disk about its central axis. Samples placed over the rotating disk initially demonstrated a weight loss of 0.3-0.5%. When the rotation speed was slowly reduced by changing the current in the solenoids, the shielding effect became considerably higher and reached 1.9-2.1% at maximum. 74.72.-h High-Tc cuprates