| abstract |
PROBLEM TO BE SOLVED: To provide a cubic calcium carbonate having good uniformity and dispersibility of particles, high whiteness of powder and high thermal stability, and controllable particle diameter. SOLUTION: The carbonate ion concentration is 0.1 to 3.0 mol / L. And a calcium ion concentration of 0.1-3. In preparing calcium carbonate by mixing with a calcium salt solution consisting of 0 mol / L, the carbonate solution is added dropwise to the calcium salt solution or the calcium salt solution is added dropwise to the carbonate solution over 30 seconds or more. The temperature in the system is 3-30 A method of producing a cubic calcium carbonate having a particle size of 0.05 to 5.0 μm, wherein carbonation is performed while maintaining the temperature at 0 ° C. to obtain a calcium carbonate aqueous suspension having a pH of 10 or less, and then washing with water. . |