Glass composition for glass bubbles with increased compressive s

Details Glass composition for glass bubbles with increased compressive s Glass composition for glass bubbles with increased compressive s

1992-03-26

1994-03-08

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 63, 501 65, 501 66, 501 67, 501 68, 501 69, 501 72, C03C 3078

Patent

active

052926907

ABSTRACT:
A glass composition for glass bubbles used as reinforcing fillers in plastic resin articles has an improved compressive strength and the reduced alkali amount leached from the glass. The glass composition consists essentially of, by weight percentages, SiO.sub.2 40-59%, R.sub.2 O 2-17%, R.sub.2 O being at least one selected from Li.sub.2 O, Na.sub.2 O, and K.sub.2 O, B.sub.2 O.sub.3 1-25%, RO 5-25%, RO being at least one selected from CaO, MgO, BaO, ZnO, and SrO, RO.sub.2 6-40%, RO.sub.2 being at least one selected from TiO.sub.2 and ZrO.sub.2, Al.sub.2 O.sub.3 0-13%, P.sub.2 O.sub.5 0-3%, and SO.sub.3 0.1-1.0%.

REFERENCES:
patent: 4243421 (1981-01-01), Kume
patent: 4391646 (1983-07-01), Howell
patent: 4661137 (1987-04-01), Garnier
patent: 4983550 (1991-01-01), Goetz et al.
Genda Zairyo Rikigaku (Modern Strength of Materials) pp. 201-202 1970.
Japanese Industrial Standard JIS R1602 (cited p. 7) 1986 ed.
Japanese Industrial Standard JIS R3502 (cited on p. 7) 1987 ed.

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