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Diamagnetism General Specifications

Whether an object will or will not levitate in a magnetic field B is defined
by the
balance between the magnetic force F = MB and gravity mg = V g where
is the
material density, V is the volume and g = 9.8m/s^{2}. The magnetic moment
M = (/ µ_{0})VB so
that F = (/µ_{0})BVB = (/2µ_{0})VB^{2}.
Therefore, the vertical field gradient B^{2}
required
for levitation has to be larger than 2µ_{0} g/.
Molecular susceptibilities are
typically 10^{-5}
for diamagnetics and 10^{-3} for paramagnetic materials and, since is most
often a few
g/cm^{3}, their magnetic levitation requires field gradients ~1000
and 10 T^{2}/m,
respectively.
Taking l = 10cm as a typical size of high-field magnets
and B^{2} ~ B^{2}/l as an
estimate, we
find that fields of the order of 1 and 10T are sufficient to cause levitation
of para- and
diamagnetics. This result should not come as a surprise because, as we know,
magnetic
fields of less than 0.1T can levitate a superconductor (= -1) and, from the
formulas
above, the magnetic force increases as B^{2}.

Aerogel Technical Specifications

Property
Value

Apparent density:
0.003-0.35 g/cc

Internal surface area:
600-1000m2/g

% solids:
0.13-15%

Mean pore diameters:
~20 nm

Primary particle diameter:
2-5 nm

Index of refraction:
1-1.05

Thermal tolerance:
to 500 C

Coefficient of thermal expansion:
2-4x10-6

Poisson ratio:
0.2

Young's modulus:
106-107N/m2

Tensile strength:
16 kPa

Fracture toughness:
0.8 kPa*m0.5

Dielectric constant:
1.1

Sound velocity through medium:
100 m/s

Superconducting Material Specifications

The major applications of high-temperature superconductors have mostly been
confined to products in the form of wires and thin films. However, recent
developments show that rare-earth REBa2Cu3O7-x and light rare-earth
LREBa2Cu3O7-x superconductors prepared by melt processes have a high
critical-current density at 77 K and high magnetic fields. These superconductors
will promote the application of bulk high-temperature superconductors in high
magnetic fields; the superconducting bulk magnet for the Magnetic Levitation in Electrogravitational Inductor Systems is one
possible application.

Laminate

Layers of Diamagnetic, Superconducting and Aerogel / Cellulytic materials which have been bonded together by the use of heat, pressure and, possibly, adhesive.

Tolerances

Thickness: ±10%

Size (linear dimension):
less than 100mm ±1mm

greater than100mm +2% / -1%

The Electrical Machine Designed for the Application of the Special Function of Cyclic Diamagnetic Electrogravitation