Method and apparatus for producing small hollow spheres

Details Method and apparatus for producing small hollow spheres Method and apparatus for producing small hollow spheres

1978-09-29

1979-08-07

White, Robert F.

Plastic article or earthenware shaping or treating: apparatus

Means making particulate material directly from liquid or...

425174, B22D 1101

Patent

active

041636376

ABSTRACT:
Method and apparatus for producing small hollow spheres of glass, metal or plastic, wherein the sphere material is mixed with or contains as part of the composition a blowing agent which decomposes at high temperature (T.gtoreq.600.degree. C.). As the temperature is quickly raised, the blowing agent decomposes and the resulting gas expands from within, thus forming a hollow sphere of controllable thickness. The thus produced hollow spheres (20 to 10.sup.3 .mu.m) have a variety of application, and are particularly useful in the fabrication of targets for laser implosion such as neutron sources, laser fusion physics studies, and laser initiated fusion power plants.

REFERENCES:
patent: 3274642 (1966-09-01), Cramer
patent: 3347798 (1967-10-01), Baer et al.
patent: 3975194 (1976-08-01), Farnaud et al.

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