Porous glass and process for its production

Details Porous glass and process for its production Porous glass and process for its production

1990-08-29

1992-03-31

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 54, 501 67, 501 73, 65 22, C03C 1100, C03B 1908

Patent

active

051008416

ABSTRACT:
Porous glass consisting essentially of silica, zirconia and an alkali metal compound, wherein the content of zirconia is at least 5% by weight and the content of the alkali metal compound is at least 2% by weight as calculated as M.sub.2 O wherein M is an alkali metal element, and the total pore volume (A) of pores having pore radii of from 20 to 10,000 .ANG. is at least 0.2 ml/g, and the proportion of the pore volume (B) of pores having pore radii of from 100 to 10,000 .ANG. to the total pore volume (A) of pores having pore radii of from 210 to 10,000 .ANG. is at least 80%.

REFERENCES:
patent: 3904422 (1975-09-01), Eaton
patent: 4112032 (1978-09-01), Blaszyk et al.
patent: 4528010 (1985-07-01), Edahiro et al.
patent: 4661138 (1987-04-01), Murakami
patent: 4713338 (1987-12-01), Gonzalez
patent: 4778777 (1988-10-01), Eguchi et al.
patent: 4786618 (1988-11-01), Shoup
Yogyo-kyokai-shi 93[4]1985 pp. 195-200.
Journaql of Chromatography 83(1973) pp. 5-9.
Japanese Unexamined Patent Publication No. 5817/1972 (Claiming priority of West German Patent Application No. P 20 42 910.1 (1970.8.29)).

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