Synthesis of Aragonite from Scallop Shells and Lime Stones. Morphological control by successive reaction.
Synthesis of Aragonite from Scallop Shells and Lime Stones. Morphological control by successive reaction.
复制标题
从扇贝壳和石灰石合成文石。
DOI：
10.2473/shigentosozai.117.747
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Tsunekawa
中科院分区：
文献类型：
--
作者：
K. Sasaki;Hiroyuki Kobayashi;M. Tsunekawa
在CO2鼓泡条件下，以煅烧-水合扇贝壳和煅烧石灰石为原料，在含Mg 2+的水溶液体系中，通过连续反应合成文石型轻质碳酸钙。为了获得高长径比的文石，第二步反应的反应温度和Ca ~（2+）离子浓度是重要的。第二步反应温度高于第一步反应温度时，文石的长径比增大。当在第二步中加入的钙源的量比在第一步中加入的量少，并且在第二步中的反应温度比在第一步中的反应温度低时，产生不具有光滑表面的文石大颗粒。连续反应有利于扩大文石的形貌多样性。
Aragonite-type of light calcium carbonate was synthesized by the successive reaction using calcined-hydrous scallop shells and calcined lime stones in the aqueous system with Mg2+ ions under the CO2 bubbling. In order to obtain the high aspect ratios of aragonite, the reaction temperature and concentrations of Ca2+ ions in the 2nd step were important. The aspect ratio of aragonite increased when the reaction temperature was higher in the 2nd step than in the 1st step of the successive reaction. When the smaller amounts of calcium source were added in the 2nd step than in the 1st step, and the reaction temperature was lower in the 2nd step than in the 1st step, large particles of aragonite were produced with no smooth surfaces. The successive reaction was useful to extend the variety of morphologies in aragonite.