Ceramic Microspheres

Details Ceramic Microspheres Ceramic Microspheres

1990-12-21

1992-12-29

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501128, 501131, 428614, 524450, C04B 3510

Patent

active

051751330

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 3.2-3.9 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.

REFERENCES:
patent: 4427068 (1984-01-01), Fitzgibbon
patent: 4440866 (1984-04-01), Lunghofer et al.
patent: 4623630 (1986-11-01), Fitzgibbon
patent: 4639427 (1987-01-01), Khaund
patent: 4668645 (1987-05-01), Khaund
patent: 4713203 (1987-12-01), Andrews
patent: 4879181 (1989-11-01), Fitzgibbon
patent: 4894285 (1990-01-01), Fitzgibbon
patent: 4921820 (1990-05-01), Rumpf et al.

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