Research of the structure and dynamic interactions of particles in the LiKNO- R (R = α-AlO, γ-AlO, SiO) and (LiNO-LiClO) - γ-AlO composites in various temperature conditions and phase states.

The paper presents a comprehensive study of the LiKNO- R (R = α-AlO, γ-AlO, SiO) and (LiNO - LiClO4) - γ- AlO composite salt systems by vibrational spectroscopy, X-ray diffractometry, and differential scanning calorimetry. According to the results of Raman spectra and XRD analysis, it has been found that in the case of a sufficiently small filler (15 nm-γ-AlO and SiO), an amorphous phase appears, both for systems based on LiKNO and for the nanocomposite based on (LiNO)-(LiClO). In the case of nanocomposites based on the LiKNO system, this additionally leads to the formation of the metastable KNO (R3m) phase. The temperature changes in the half-widths of the corresponding bands of the Raman spectrum during the transition from a solid-phase to a molten state become less significant as the concentration of the oxide filler increases. At x ≥ 0.7, on the temperature dependences of the half-width of the ν1 (A) band in the vicinity of the melting point, only a small kink characteristic of amorphous systems is noticed. This is confirmed by the results of thermal analysis. It has been found that the solid filler has a different effect on the processes of orientational and vibrational relaxation in the molten phases of the studied NIS, namely, the orientational mobility of NO decreases, while the relaxation rate of its vibrational excitation increases.