| 摘要 |
PROBLEM TO BE SOLVED: To provide vaterite type calcium carbonate having a crossed disk-like, hamburger-like or disk-like shape, which hardly contains impurities and is usable in wide-ranging fields and in which the particle size of highly-dispersible particles is controlled, and to provide a method for manufacturing vaterite type calcium carbonate. SOLUTION: Vaterite type calcium carbonate having the crossed disk-like, hamburger-like or disk-like shape, which has 1-20μm disk-like standard particle size, is manufactured by preparing an aqueous solution containing water-soluble calcium salt of 0.1-1 mol/L concentration and another aqueous solution containing water-soluble carbonate of 0.1-1 mol/L concentration and reacting the water-soluble calcium salt with the water-soluble carbonate at 5-60°C reaction temperature by dripping the former solution in the latter solution or the latter solution in the former solution for 0.1-10 hours while accelerating/decelerating the rotational speed of an agitator. COPYRIGHT: (C)2007,JPO&INPIT
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