Rare earth polishing compositions

Details Rare earth polishing compositions Rare earth polishing compositions

1980-12-22

1985-07-16

Derrington, James

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

51307, 423263, B24D 1700

Patent

active

045294100

ABSTRACT:
Rare earth glass-polishing compositions of improved homogeneity and reproducibility are prepared by (a) simultaneously continuously admixing a cerium salt solution, a basic solution and a solution of at least one acid and/or one salt, the anion or anions of which being adopted to form insoluble rare earth compounds, the number of equivalents of base being equal to or greater than the number of equivalents of cerium, and the pH of the reaction medium being greater than about 6; (b) filtering the precipitate which reuslts from the reaction medium; (c) drying said recovered precipitate; and (d) calcining said dried precipitate.

REFERENCES:
patent: 3262766 (1966-07-01), Nonamaker
patent: 3311461 (1967-03-01), Silvernail
patent: 3768989 (1973-10-01), Goetzinger et al.
Chemical Abstracts, vol. 80, 1974, 51688q.
Chemical Abstracts, vol. 93, 1980, 30807f.
Chemical Abstracts, vol. 82, 1975, 128702r.

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