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Title: Compound transparent ceramics and methods of preparation thereof

Patent ·
OSTI ID:1082454

According to one embodiment, a method for forming a composite transparent ceramic preform includes forming a first suspension of oxide particles in a first solvent which includes a first dispersant but does not include a gelling agent, adding the first suspension to a first mold of a desired shape, and uniformly curing the first suspension in the first mold until stable. The method also includes forming a second suspension of oxide particles in a second solvent which includes a second dispersant but does not include a gelling agent, adding the second suspension to the stable first suspension in a second mold of a desired shape encompassing the first suspension and the second suspension, and uniformly curing the second suspension in the second mold until stable. Other methods for forming a composite transparent ceramic preform are also described according to several other embodiments. Structures are also disclosed.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC52-07NA27344
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Number(s):
8,329,090
Application Number:
12/603,195
OSTI ID:
1082454
Country of Publication:
United States
Language:
English

References (7)

Controlled Gelation and Sintering of Monolithic Gels Prepared from gamma-Alumina Fume Powder journal April 1991
Nanostructured energetic materials using sol–gel methodologies journal June 2001
Hydrolysis-assisted solidification (HAS): A new setting concept for ceramic net-shaping journal January 1997
YAG ceramic processed by slip casting via aqueous slurries journal March 2008
Sintering book January 1990
Preparation and sintering of high-density green bodies to high-purity silica glasses journal March 1987
Hydrolysis-assisted solidification of alumina slurry dispersed in silica sol without de-airing process journal June 2006

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