| 摘要 |
The invention provides an amorphous fine-particle powder capable of giving a perovskite-type barium titanate fine powder which has stable quality and is free from residual by-products such as barium carbonate; and a process for the production of the fine-particle powder. An amorphous fine-particle powder which contains titanium, barium, lactic acid, and oxalic acid and has a mean particle diameter of 3μm or below, a BET specific surface area of 6m2/g or above and a Ba/Ti molar ratio of 0.98 to 1.02 and which is in an amorphous state as determined by X-ray diffraction and exhibits peaks at 1120 to 1140cm-1 and at 1040 to 1060cm-1 respectively in the infrared absorption spectrum; and a process for the production of an amorphous fine-particle powder by bringing, in a solvent containing an alcohol, a solution (A) containing a titanium component, a barium component, and a lactic acid component into contact with a solution (B) containing an oxalic acid component.
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