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Title: Method and apparatus for producing small hollow spheres

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.

Inventors:
 [1]
  1. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
OSTI Identifier:
863403
Patent Number(s):
4163637
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
C - CHEMISTRY C03 - GLASS C03B - MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; producing; hollow; spheres; glass; metal; plastic; sphere; material; mixed; contains; composition; blowing; agent; decomposes; temperature; gtoreq; 600; degree; quickly; raised; resulting; gas; expands; forming; controllable; thickness; produced; 20; 10; variety; application; particularly; useful; fabrication; targets; laser; implosion; neutron; sources; fusion; physics; studies; initiated; power; plants; power plants; hollow spheres; blowing agent; particularly useful; power plant; neutron source; laser fusion; produced hollow; neutron sources; fusion power; gas expands; laser initiated; sphere material; hollow sphere; /425/376/

Citation Formats

Hendricks, Charles D. Method and apparatus for producing small hollow spheres. United States: N. p., 1979. Web.
Hendricks, Charles D. Method and apparatus for producing small hollow spheres. United States.
Hendricks, Charles D. Mon . "Method and apparatus for producing small hollow spheres". United States. https://www.osti.gov/servlets/purl/863403.
@article{osti_863403,
title = {Method and apparatus for producing small hollow spheres},
author = {Hendricks, Charles D},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}