Production of ZrO.sub.2 powder of very fine particle size

Details Production of ZrO.sub.2 powder of very fine particle size Production of ZrO.sub.2 powder of very fine particle size

1987-01-30

1990-06-12

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

423 76, 423 77, 423266, 423341, 423468, 423492, 423608, 501103, 501104, C01G 2502

Patent

active

049331540

ABSTRACT:
A ZrO.sub.2 powder of very fine particle size adapted especially for the making of high density ceramics is produced by chlorinating a zirconium source material, such as zircon sand, to produce crude ZrCl.sub.4 solids; the solids are dissolved to form a ZrOCl.sub.2 solution from which ZrOCl.sub.2 crystals are precipitated; the crystals are dried and milled to a desired particle size; and the crystal particles are subjected to direct oxidation under controlled conditions to produce a very fine ZrO.sub.2 powder especially adapted to the making of high density ceramics.

REFERENCES:
patent: 3334962 (1967-08-01), Clearfield
The Chemical Behavior of Zirconium, W. B. Blumenthal, D. Van Nostrand Co., N.J., 1958, pp. 106-107, 123-125.
Hackh's Chemical Dictionary, McGraw-Hill, 4th Ed., N.Y., 1969, p. 737.

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