Method for manufacturing amorphous silica objects

Details Method for manufacturing amorphous silica objects Method for manufacturing amorphous silica objects

1989-11-15

1991-11-05

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

By extrusion spraying or gravity fall through orifice

264 63, 423335, B29B 900, C01B 3312

Patent

active

050630032

ABSTRACT:
The method involves prehydrolysing alkoxysilanes and atomizing to droplets which are then cured to hardened beads with no or very low porosity and narrow size distribution by slurrying with aqueous ammonia. The cured beads are mixed with binders and the resulting pastes are compacted to green forms; the greens are sintered to fused silica-like objects at temperatures significantly lower than the melting of silica.

REFERENCES:
patent: 3535890 (1970-10-01), Hansen
patent: 4243422 (1981-01-01), Lenz
patent: 4317668 (1982-03-01), Susa et al.
patent: 4775520 (1988-10-01), Unger et al.
patent: 4806328 (1989-02-01), van Lierop et al.
patent: 4842837 (1989-06-01), Shimizu et al.

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