Metal tungstates and method of preparing them and their use

Details Metal tungstates and method of preparing them and their use Metal tungstates and method of preparing them and their use

1995-05-09

1999-02-23

Bos, Steven

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423593, 423594, C01G 400

Patent

active

058740562

ABSTRACT:
Phase-pure, crystalline tungstates of general composition Me(II)WO.sub.4, where Me(II)=Co, Ni, Zn, Pb, Mg, Ca, Sr and/or Ba. These are prepared by wet mixing tungsten components (preferably ammonium paratungstate or metatungstate) with corresponding sponding Me(II) oxides and used, preferably, in making perovskites and X-ray intensifier phosphors.

REFERENCES:
patent: 5079199 (1992-01-01), Ochi et al.
Chem. Abstract 88:177618, 1997 (no month), by Nakahara, et al., "Surface Properties of Spherical Calcium Tungstate Powder", Osaka Kogyo Gijutsu Shikensko Kiho, 28(3), pp. 201-206.
DIN 66131 publication of H.C. Starck, Jul. 1993.
German Patent Office action dated Dec. 5, 1994.

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