Ammonia Nitridation Synthesis and Structural Change of Strontium Cyanamide Polymorphs
Ammonia Nitridation Synthesis and Structural Change of Strontium Cyanamide Polymorphs
复制标题
DOI：
10.2109/jcersj2.115.729
复制
发表时间：
2007
影响因子：
1.1
通讯作者：
T. Takeda;N. Hatta;S. Kikkawa
中科院分区：
文献类型：
--
作者：
T. Takeda;N. Hatta;S. Kikkawa
通过在600-850°C下在流动的氨中烧制乙酸锶来制备两种氰胺锶多晶型物（三方低温相和正交高温相）。通过后退火，三角形低温相不可逆地转变为正交高温相。这两种结构的不同之处在于SrN 6八面体键和（NCN）2-排列。讨论了结构变化与锶阳离子与SrN 6八面体键角或边共享之间的排斥作用的关系。
Two strontium cyanamide polymorphs (trigonal low temperature phase and orthorhombic high temperature phase) were prepared by firing strontium acetate in ammonia flowing at 600-850°C. Trigonal low temperature phase irreversibly changed to orthorhombic high temperature phase by post annealing. The two structures differed in SrN6 octahedon linkage and (NCN)2- arrangement. The structural change was discussed in relation to repulsion between strontium cations and SrN6 octahedron linkage by corner or edge sharing.