廃ホタテ貝殻焼成物を原料とするaragonite型軽質炭酸カルシウムの合成(第3報) -常温水溶液系における高純度aragoniteの生成- [in Japanese] Synthesis of Aragonite-type of Calcium Carbonate from Calcined Scallop Shell (3rd Report) -In aqueous system at ambient temperatures - [in Japanese]
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Aragonite-type light calcium carbonate was synthesized from calcined scallop shell at ambient temperature in the aqueous system with Mg2+ ions under the CO2 bubbling for 4 hours. The important factors to obtain high purity of aragonite were the mole ratio of Ca2+/ Mg2+, flow rate of CO2 , reaction time, pH and temperature. Under the optimum condition, the purity of aragonite in products was determined to be more than 99.4 (w/w) %, by XRD and FTIR analyses. The specific surface area was obtained to be 5-8 m2 g-1 by the BET method, and the morphology was characterized in wisker with several micrometers in length by SEM.
- Journal of MMIJ
Journal of MMIJ 114(10), 715-720, 1998-09-25
The Mining and Materials Processing Institute of Japan