硫酸镁水合物的太赫兹表征

Terahertz characterization of magnesium sulfate hydrate

摘要:

太赫兹时域光谱技术作为一种新型光谱检测手段，可用于包括水合物在内的多种物质的表征。金属硫酸盐具有多种不同的水合物，在太赫兹波段表现出不同的吸收特性，利用太赫兹光谱技术可以对过渡金属硫酸盐的不同水合物进行有效表征。本文利用太赫兹时域光谱系统对硫酸镁及其水合物进行表征。通过对七水硫酸镁进行恒温干燥，得到不同的硫酸镁热解产物并对其太赫兹吸收光谱进行研究。实验结果表明不同水合物表现出差异明显的太赫兹吸收特性。这为硫酸镁水合物的多种应用提供了重要参考，也为过渡金属硫酸盐及其水合物的检测提供了简单、快捷、有效的表征手段。

Abstract:

Terahertz time-domain spectroscopy is used as a new spectroscopic detection tool for the characterization of a wide range of substances including hydrates. Metal sulphates have a variety of different hydrates that exhibit different absorption properties in the terahertz band, and the different hydrates of transition metal sulphates can be effectively characterized by using terahertz spectroscopy. In this paper, magnesium sulphate and its hydrates were characterized by using a terahertz time-domain spectroscopy system. Different magnesium sulphate pyrolysis products were obtained by constant temperature drying of magnesium sulphate heptahydrate and their terahertz absorption spectra were investigated, which shows that different hydrates exhibit significantly different terahertz absorption properties. The research provides a simple, fast and effective means of characterization for the detection of magnesium sulphate and its hydrates, as well as an important reference for a variety of applications of magnesium sulphate.