Method of making ceramic microspheres

Details Method of making ceramic microspheres Method of making ceramic microspheres

1992-09-23

1993-08-31

Theisen, Mary Lynn

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 56, 264125, C04B 3510

Patent

active

052406547

ABSTRACT:
A calcined microsphere of ultrafine bauxite particles having a mean particle size in the range 0.01 to 0.3 micrometers, said microsphere having a particle size less than 30 micrometers and being characterized by a substantially solid form having a pycnometric density substantially falling in the range 3.2-3.0 g/cm.sup.3, a BET surface area substantially falling in the range 0.05 to 0.5 m.sup.2 /g and a crystal grain size less than 4 micrometers, the surface chemistry of the microsphere being modified to enhance the wettability of the microsphere and to improve its ability to bond strongly with matrix materials in use.

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patent: 4894285 (1990-01-01), Fitzgibbon
patent: 4921820 (1990-05-01), Rumpf et al.

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