Method to produce large, uniform hollow spherical shells

Patent · Tue Jan 01 00:00:00 EST 1985

OSTI ID:865645

Hendricks, Charles D ^[1]

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1. Livermore, CA

Large, uniform hollow spherical shells are produced by forming uniform size drops of heat decomposable or vaporizable material, evaporating the drops to form dried particles, coating the dried particles with a layer of shell forming material, and heating the composite particles to melt the outer layer and decompose or vaporize the inner particle to form an expanding inner gas bubble which expands the outer layer. By cycling the temperature and pressure on the hollow shells, spherical shells with uniform walls are produced.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4548767
• OSTI ID: 865645
• Country of Publication: United States
• Language: English

Related Subjects

method
produce
uniform
hollow
spherical
shells
produced
forming
size
drops
heat
decomposable
vaporizable
material
evaporating
form
dried
particles
coating
layer
shell
heating
composite
melt
outer
decompose
vaporize
inner
particle
expanding
gas
bubble
expands
cycling
temperature
pressure
walls
spherical shell
spherical shells
outer layer
hollow spherical
gas bubble
uniform size
forming material
uniform wall
hollow shell
heat decomposable
dried particles
uniform hollow
forming uniform
niform hollow
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