Abstract: The mixed amorphous composites of soluble salts NaNO₂ and KNO₂ were prepared by ice sublimation method. At the condition of n(NaNO₂)∶n(KNO₂)=1∶1, the relative intensity of the diffraction peak of the amorphous product reaches the maximum; and the length of short range order decreased from 6.7 nm to 4.8 nm while the proportion of NaNO₂ to KNO₂ increase. Specially, the minimum of 3.7 nm reaches at the condition of n(NaNO₂)∶n(KNO₂)=2∶1. So we believe new amorphous structure that is different from pure NaNO₂ or KNO₂ amorphous structure has been formed.

Key words: ice sublimation, amorphous, short range order