Process of making finely divided powders of alkaline earth metal

Details Process of making finely divided powders of alkaline earth metal Process of making finely divided powders of alkaline earth metal

1984-09-14

1988-05-31

Bell, Mark L.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

501136, 501137, C01G 2308, C04B 3546

Patent

active

047480165

ABSTRACT:
Finely divided powders of alkaline earth metal titanates, well suited for the fabrication of, e.g., ceramic resistors and condensers, are facilely prepared by (i) admixing a solution of an alkaline earth metal nitrate with a titanium sol having a pH ranging from 0.8 to 2.5 and which comprises elementary crystallites of TiO.sub.2 having particle sizes ranging from 10 to 100 .ANG., agglomerated into submicronic masses having particle sizes ranging from 200 to 1000 .ANG., (ii) next drying the suspension which results, (iii) calcining said dried suspension at a temperature ranging from 700.degree. to 1300.degree. C. for from 30 minutes to 24 hours, under a NO.sub.x partial pressure decreasing from 1 to 0, and then (iv) optionally grinding the powder resulting from said step (iii).

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Encyclopedia of Chemical Technology, vol. 4, pp. 225-231.

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