Process of preparation of synthetic fire opal

Details Process of preparation of synthetic fire opal Process of preparation of synthetic fire opal

2004-10-18

2008-12-16

Lopez, Carlos (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Utilizing sol or gel

C264S910000

Reexamination Certificate

active

07465421

ABSTRACT:
A synthetic fire opal and a process for its preparation. Synthetic fire opals have similar physical and chemical properties as natural fire opals. Synthetic fire opals are colored, hard, and transparent. The process of preparation of synthetic fire opal includes; mixing TEOS with absolute ethanol (99.9%), distilled water, concentrated nitric acid, and an inorganic salt to form a clear sol, storing the clear sol to obtain a gel, drying the gel and sintering the dried gel to obtain a synthetic fire opal.

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“Inverse Opals Photonic Crystals—A laboratory Guide”; Schroden and Balakrishnan; Univ. of Minnesota, Materials Science Research and Engineering Center, 2001, pp. 1-31.

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