基于太赫兹时域光谱的混合晶体特性研究

 矿物晶体的种类含量及演化温度的识别，对于探究矿物晶体的演化规律及矿产资源的合理开发利用有着重要的意义。采用蒸发结晶的方法制备不同NaCl、KCl含量配比及蒸发温度的样品，用于模拟不同组分含量和生长温度的混合晶体。利用太赫兹时域光谱系统对样品进行检测，通过分析样品的太赫兹光学参数发现，在相同生长温度下混合晶体的折射率和吸收系数都随着NaCl质量分数的增加呈线性上升的趋势；相同组分配比的混合晶体的折射率随生长温度增加呈正弦曲线的变化趋势。结果表明太赫兹时域光谱技术可以同时表征混合晶体的组分含量和生长温度，这将为探究矿物晶体的演化规律及矿产资源的合理开发利用提供一种新的有效评价手段。

CHARACTERISTICS OF MIXED CRYSTALS BASED ON TERAHERTZ TIME DOMAIN SPECTROSCOPY

 Identification of crystal concentration and evolutional temperature in minerals helps study evolutional rules of minerals and mining and development of mineral resources. This paper uses evaporation crystallization to make NaCl and KCl samples in different proportion, which are used to simulate the mixed crystal under different percentages and temperatures. Samples are then tested by terahertz time-domain spectroscopy. The refractive index and absorption coefficient of the mixed crystals at the same growing temperature rise linearly with a rising NaCl percentage, and that of the mixed crystals with same proportion shows a sinusoidal curve as growing temperature rises, which reveals that terahertz time domain spectroscopy can mark the components percentage and growing temperature of the mixed crystal at the same time. This research offers a new tool to study evolutional rule of mineral crystals and to mine and develop mineral resources.