论文标题
熔融氟化物的红外光谱：方法，电子和振动数据，结构解释以及与辐射传热相关的
Infrared Optical Spectroscopy of Molten Fluorides: Methods, Electronic and Vibrational Data, Structural Interpretation, and Relevance to Radiative Heat Transfer
论文作者
论文摘要
为了解决预测熔融盐的辐射传热（RHT）行为的需求，我们对熔融氟化物盐的红外光谱测量方法进行了全面综述。讨论了透射率，反射率和反式反射实验方法，以及相应的数据还原方法和每种技术的局限性。光谱是一种方便的间接探针，用于变化温度和组成的结构参数。编译了用于过渡金属，灯笼和actacinide溶质的电子和振动吸收数据，以及碱和碱土氟化物溶剂的振动吸收数据，并讨论了相应的结构解释，并与其他实验和理论工作进行了比较。我们发现，溶剂和溶质振动的吸收在中红外可能是显着的，从而产生了与RHT显着性的近红外边缘。现有边缘数据的伸出和平均导致FLIBE的700度C的估计灰色吸收系数值为493 m^（-1），而Flinak的伸出率为148 m^（-1），均在1至6000 m^（-1）的范围内，均与辐射热传递分析相关的1至6000 M^（-1）范围内。
To help address the need for predicting radiative heat transfer (RHT) behavior of molten salts, we conducted a comprehensive review of methods and data from infrared optical spectroscopic measurements on molten fluoride salts. Transmittance, reflectance, and trans-reflectance experimental methods are discussed, along with the corresponding data reduction methodology and the limitations of each technique. Optical spectroscopy is a convenient indirect probe for changes in structural parameters with temperature and composition. Electronic and vibrational absorption data for transition-metal, lanthanide, and actinide solutes and vibrational absorption data for alkali and alkaline earth fluoride solvents are compiled, and the corresponding structural interpretation is discussed and compared with other experimental and theoretical work. We find that solvent and solute vibrational absorption can be significant in the mid-infrared, resulting in near-infrared edges of significance to RHT. Extrapolation and averaging of existing edge data leads to estimated gray absorption coefficient values at 700 degrees C of 493 m^(-1) for FLiBe and 148 m^(-1) for FLiNaK, both within the range of 1 to 6000 m^(-1) identified to be of engineering relevance for radiative heat transfer analysis.
