Ceramic materials and their synthesis by a xerogel process

Details Ceramic materials and their synthesis by a xerogel process Ceramic materials and their synthesis by a xerogel process

1991-11-01

1993-07-20

Group, Karl

Compositions: ceramic

Ceramic compositions

501 12, 501152, 505735, 505737, 505780, 25231501, C04B 3500

Patent

active

052293351

ABSTRACT:
The invention provides a process for producing high phase purity ceramic materials through the utilization of organic gelling agents. The process comprises the following steps: (a) dissolving stoichiometric amounts of metal salts in a solvent to form a solution; (b) heating the solution to a temperature sufficient to dissolve the gelling agent; (c) dissolving from about 0.1 to about 50 weight percent of an organic gelling agent into the heated solution; (d) cooling the solution to form a gel; (e) drying the gel to form a xerogel precursor; and (f) subjecting the xerogel precursor to a calcination process to produce a high phase purity ceramic material.

REFERENCES:
patent: 4829031 (1989-05-01), Roy et al.
patent: 5066636 (1991-11-01), Liu et al.
Umeda et al., "Superconducting Fibers by the Sol-Gel Method", Adv. Cerm. ., vol. 3, No. 5 (1988) pp. 520-522.

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