Millimeter-sized sodalite single crystals grown under high-temperature, high-pressure hydrothermal conditions
Millimeter-sized sodalite single crystals grown under high-temperature, high-pressure hydrothermal conditions
复制标题
高温高压水热条件下生长的毫米级方钠石单晶
DOI：
10.1016/s1387-1811(00)00322-x
复制
发表时间：
2001
影响因子：
5.2
通讯作者：
T. Okubo
中科院分区：
文献类型：
--
作者：
T. Shiraki;T. Wakihara;M. Sadakata;M. Yoshimura;T. Okubo
在高温高压水热条件下生长出毫米级方钠石单晶。使用镀金的高压釜去除反应器壁上的污染物。首先研究了自发形核模式。随着合成时间的延长，方钠石晶体从自发成核开始生长，但10 h后，副产物霞石的生成阻碍了方钠石的进一步生长。通过优化合成时间，获得了0.25mm的方钠石晶体。在此基础上，研究了籽晶生长，并且在没有副产物形成的情况下再现了大于1.0mm的单晶。最大的方钠石单晶直径为2.6mm。在整个籽晶生长过程中，发现控制降温阶段的温度分布是增大晶体尺寸的关键。产品为优质方钠石单晶。
Millimeter-sized sodalite single crystals are grown under high-temperature, high-pressure hydrothermal conditions. A gold-lined autoclave is used to remove the contaminants from the reactor wall. Spontaneous nucleation mode is studied at first. As the synthesis time was extended, sodalite crystals grow from spontaneous nucleation; however, the formation of a by-product of nepheline hinders the further growth of sodalite after 10 h. Optimizing the synthesis time, a 0.25 mm sodalite crystal is obtained. Based on this result, the seeded growth is studied, and the single crystals larger than 1.0 mm are reproduced without the by-product formation. The maximum sodalite single crystal was 2.6 mm in diameter. Throughout the seeded growth, it is found that the control of the temperature profile at the cooling-down stage is a key to enlarge the crystal size. The product is a sodalite single crystal with high quality.