Method of manufacturing barium titanate BaTiO.sub.3

Details Method of manufacturing barium titanate BaTiO.sub.3 Method of manufacturing barium titanate BaTiO.sub.3

1989-02-10

1991-04-23

Morris, Theodore

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423609, C01G 2300

Patent

active

050098764

ABSTRACT:
A method of manufacturing barium titanate (BaTiO.sub.3) (BaTiO(C.sub.2 O.sub.4).sub.2. 4H.sub.2 O), is by pyrolysis of barium titanyl oxalate, an provided in which aqueous solution of barium chloride (BaCl.sub.2) is added dropwise while stirring vigorously to an aqueous solution comprising a mixture of oxalic acid (H.sub.2 C.sub.2 O.sub.4) and titanium oxychloride (TiOCl.sub.2) having a temperature in the range from 20.degree. to 60.degree. C. to form barium titanyl oxalate, the resultant precipitate being calcined at a temperature in the range from 960.degree. to 1200.degree. C.

REFERENCES:
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patent: 4670243 (1987-06-01), Wilson et al.
Chemical Abstracts, vol. 68 (1968) 8826Y.
Kutty et al., Materials Letters, EPR Study on the Role of MN in Enhancing PTC of BaTiO.sub.3, 4/1985, Nos. 5-6, pp. 195-199.
Van Nostrand's Scientific Encyclopedia, 4th ed., D. Van Nostrand Company, N.J.
Clabaugh et al., Journal of Research of the National Bureau of Standards, vol. 56, No. 5, 1956, "Preparation of Barium Titanyl Oxalate Tetrahydrate for Conversion to Barium Titanate of High Purity", pp. 289-291.

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