Method of producing a mixed metal oxide powder and mixed metal o

Details Method of producing a mixed metal oxide powder and mixed metal o Method of producing a mixed metal oxide powder and mixed metal o

1995-08-03

1998-03-17

Bos, Steven

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423594, 423595, 423599, C01G 2900, C01G 5100, C01G 3700, C01G 4500

Patent

active

057283621

ABSTRACT:
A mixed metal oxide powder of nominal composition M.sub.x M'.sub.x ' . . . , O.sub.z, wherein M, M', . . . are metal elements and each of x, x', . . . z is greater than zero, is produced by forming an aqueous solution comprising metal salts such that the solution contains at least some of the metal elements of the mixed metal oxide in a desired ratio and comprises at least one oxidizing agent such as a nitrate of one of the metals, and at least one reducing agent such as an organic acid. The oxidizing and the reducing agent as well as the ratio of the former to the latter are chosen such that the thus-formed tuned solution undergoes an exothermic reaction occurs at a desired rate and at a desired small temperature range. Aerosol-droplets of essentially equal dimensions are generated from the tuned solution and are sprayed into a heated gas jet. The temperature of the gas jet and the residential time of the droplets in the gas jet are chosen such that the exothermic reaction and that the material of the mixed metal oxide powder is formed into an essentially amorphous oxide phase. Mixed metal oxide powder manufactured according to this method can be used in a sintering process for forming any high performance ceramics, in particular a metal oxide varistor with an excellent homogeneity, a high breakdown voltage and a low protection factor.

REFERENCES:
patent: 2155119 (1939-04-01), Ebner
patent: 4023961 (1977-05-01), Douglas et al.
patent: 4540971 (1985-09-01), Kanai et al.
patent: 4668299 (1987-05-01), Nanao et al.
patent: 4853199 (1989-08-01), Inoue et al.
patent: 4999182 (1991-03-01), Baumard et al.
patent: 5061682 (1991-10-01), Aksay et al.
patent: 5075090 (1991-12-01), Lewis et al.
patent: 5358695 (1994-10-01), Helble et al.
patent: 5395821 (1995-03-01), Kroeger et al.

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