固碳矿物-片钠铝石的最佳水热合成条件  

Optimum hydrothermal synthesis conditions of carbon fixing mineral-dawsonite

作　　者：曲希玉 李倩 闫振 李玉钤 QU Xiyu;LI Qian;YAN Zhen;LI Yuqian(School of Earth Science and Technology in China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《中国石油大学学报（自然科学版）》2023年第3期27-34,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：山东省自然科学基金面上项目(ZR2020MD027)。

摘　　要：采用化学试剂水热法来合成片钠铝石,考察片钠铝石的最佳人工合成条件。结果表明:当pH为9.0~10.0、温度为120~180℃、合成时间大于12 h时,可以得到纯相的片钠铝石;晶体粒径随pH的增大逐渐增大,随温度升高先增大后减小,160℃时最大;生成片钠铝石的质量随温度和pH的升高而先增多后减少,在160℃(pH为9.5)时最多;片钠铝石的结晶首先以结晶核为中心形成球粒,进而沿一定方向聚集形成针状晶体,然后增大变为长柱状晶体,整个过程片钠铝石的结晶度逐渐变好。The dawsonite was synthesized by chemical reagent hydrothermal method,and the optimal artificial synthesis con-ditions of dawsonite were studied.It is found that pure dawsonite can be obtained when the pH is 9.0-10.0,the temperature is 120-180℃,and the synthesis time is more than 12 h.The crystal size gradually increases with the increase of pH,in-creases first and then decreases with the increase of temperature,and reaches the maximum at 160℃.The weight of genera-ted dawsonite increases first and then decreases with the increase of temperature and pH,and it is the highest at 160℃(pH is 9.5).The crystallization of dawsonite first forms spherical particles centered on the crystal nucleus,and then aggregates in a certain direction to form needle-like crystals,and then increases to long columnar crystals.The crystallinity of dawsonite gradually becomes better in the whole process.

关 键 词：片钠铝石 固碳矿物 水热实验 酸碱度 温度 

分 类 号：P574[天文地球—矿物学]