Chemical reactions and structural phase transitions of sodalites and cancrinites in temperature dependent infrared (TIR) experiments
Chemical reactions and structural phase transitions of sodalites and cancrinites in temperature dependent infrared (TIR) experiments
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温度依赖性红外 (TIR) 实验中方钠石和钙霞石的化学反应和结构相变
DOI：
10.1016/j.micromeso.2005.05.054
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发表时间：
2005
影响因子：
5.2
通讯作者：
C. Rüscher
中科院分区：
文献类型：
--
作者：
C. Rüscher
红外透明颗粒内高度稀释的固体（例如 KBr、NaCl 等）的红外吸收很容易测量为直至基质熔点的温度的函数。缺点可能是基质和样品之间的任何相互作用或化学反应。然而，此类反应和嵌入样品内的反应可以系统地用于研究新材料的产生。这里，将给出四种类型的工作示例。从对 NaNO3-方钠石相变特性的典型温度相关 (TIR) 研究开始，显示了基体和方钠石之间 Na/K 交换如何影响这种固有特性。其次，考虑了 KBr 颗粒中原位研究的脱水对 NaB(OH)4-方钠石的影响。第三，描述了铁霞石家族中新成分形成的原位研究。本文报道了这种典型微孔材料的脱水效应以及 Na/K 和 Cl/Br/NO3 的联合交换。最后，将简要概述从 KBr 容器中的溶胶凝胶液体化学形成软方钠石的第一步。
The infrared absorption of a solid highly diluted within an infrared transparent pellet (e.g., KBr, NaCl, etc.) is easily measured as a function of the temperature up to the melting point of the matrix. A disadvantage could be any interaction or chemical reaction between the matrix and the sample. However, such reactions and reactions within the embedded sample can be used in a systematical way for the investigation of the creation of new materials. Here, four types of working examples will be given. Starting with typical temperature dependent (TIR) investigations on the phase transition characteristics of a NaNO3–sodalite it is shown how this intrinsic property is effected by an exchange of Na/K between the matrix and the sodalite. Secondly, the effect of dehydration on NaB(OH)4–sodalite as studied in situ in the KBr pellet is considered. Thirdly, in situ investigations of the formation of new compositions within the family of cancrinites are described. Here, the effect of dehydration, and the combined exchange of Na/K and Cl/Br/NO3of this typical microporous material is reported. Finally, the first steps of the soft chemically formed sodalite from the sol–gel liquid in the KBr container will be outlined briefly.