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Title: Hollow spherical shell manufacture

Abstract

A process for making a hollow spherical shell of silicate glass composition in which an aqueous suspension of silicate glass particles and an immiscible liquid blowing agent is placed within the hollow spherical cavity of a porous mold. The mold is spun to reduce effective gravity to zero and to center the blowing agent, while being heated so as to vaporize the immiscible liquid and urge the water carrier of the aqueous suspension to migrate into the body of the mold, leaving a green shell compact deposited around the mold cavity. The green shell compact is then removed from the cavity, and is sintered for a time and a temperature sufficient to form a silicate glass shell of substantially homogeneous composition and uniform geometry.

Inventors:
 [1]
  1. Belleville, MI
Issue Date:
Research Org.:
KMS Fusion Inc
OSTI Identifier:
868075
Patent Number(s):
5068071
Assignee:
KMS Fusion, Inc. (Ann Arbor, MI)
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
B - PERFORMING OPERATIONS B22 - CASTING B22F - WORKING METALLIC POWDER
DOE Contract Number:  
AC03-87DP10560
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
hollow; spherical; shell; manufacture; process; silicate; glass; composition; aqueous; suspension; particles; immiscible; liquid; blowing; agent; placed; cavity; porous; mold; spun; reduce; effective; gravity; zero; center; heated; vaporize; urge; water; carrier; migrate; leaving; green; compact; deposited; removed; sintered; time; temperature; sufficient; form; substantially; homogeneous; uniform; geometry; spherical shell; substantially homogeneous; aqueous suspension; spherical cavity; blowing agent; temperature sufficient; glass composition; hollow spherical; glass particles; immiscible liquid; silicate glass; mold cavity; glass shell; liquid blowing; /264/65/419/

Citation Formats

O'Holleran, Thomas P. Hollow spherical shell manufacture. United States: N. p., 1991. Web.
O'Holleran, Thomas P. Hollow spherical shell manufacture. United States.
O'Holleran, Thomas P. Tue . "Hollow spherical shell manufacture". United States. https://www.osti.gov/servlets/purl/868075.
@article{osti_868075,
title = {Hollow spherical shell manufacture},
author = {O'Holleran, Thomas P},
abstractNote = {A process for making a hollow spherical shell of silicate glass composition in which an aqueous suspension of silicate glass particles and an immiscible liquid blowing agent is placed within the hollow spherical cavity of a porous mold. The mold is spun to reduce effective gravity to zero and to center the blowing agent, while being heated so as to vaporize the immiscible liquid and urge the water carrier of the aqueous suspension to migrate into the body of the mold, leaving a green shell compact deposited around the mold cavity. The green shell compact is then removed from the cavity, and is sintered for a time and a temperature sufficient to form a silicate glass shell of substantially homogeneous composition and uniform geometry.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}