Porous ceramic beads

Details Porous ceramic beads Porous ceramic beads

1993-08-23

1994-06-21

Group, Karl

Compositions: ceramic

Ceramic compositions

Pore-forming

501 87, 501 96, 501103, 501127, 501133, 501134, 501137, 501 12, C04B 3800

Patent

active

053228219

ABSTRACT:
Ceramic beads having a bimodal pore distribution are prepared by a process involving a) formation of a ceramic particle slurry, b) adding a foamable prepolymer to the slurry to form a mixture, c) dispersing the mixture as beads in a second liquid, d) polymerizing and foaming the prepolymer, e) recovering the beads and firing them to remove the polymer and bond the ceramic particles. The beads can optionally be joined by sintering. Beads with a monodal pore distribution can be made by using a nonfoaming prepolymer.

REFERENCES:
patent: 3833386 (1974-09-01), Wood et al.
patent: 4011096 (1977-03-01), Sandell
patent: 4051073 (1977-09-01), Hegedus et al.
patent: 4407967 (1983-10-01), Luks
patent: 4654075 (1987-03-01), Cipollini
patent: 4657754 (1987-04-01), Bauer et al.
patent: 4749664 (1988-06-01), Ross et al.
patent: 5082607 (1992-01-01), Tange et al.
patent: 5212143 (1993-05-01), Torobin
patent: 5217930 (1993-06-01), Dubots
"Processing of Porous Ceramics" by Jeannine Saggio-Woyansky and Curtis E. Scott, GE Lighting, Cleveland, Ohio Nov. 1992.
HYPOL, Laboratory Procedures and Foam Formulations, 1988.

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