抄録
To obtain the glass-forming condition of the binary mixtures consisting of alkali (Li, Na, or K) and magnesium nitrates, the dehydration processes were investigated by means of thermogravimetry.
The reaction rate of initial dehydration and the water content of dehydrated mixture were measured for 18 samples, of which compositions are shown in Table I. The results shown in Table II indicated that the both measured values were not correlated directly to the glass-forming ability.
However, the glass-forming was not observed if the rate constant of dehydration was less than 0.12. On the other hand, the concentration of alkali nitrates had a significant effect to the glass formation. Unless the concentration of alkali nitrates exceeded a certain value in each binary system, the glass-forming did not take place (see Fig. 8-10).
Therefore, it is concluded that the glass-forming may be restricted to the following two conditions; (i) the dehydration rate constant is more than 0.12 and (ii) the concentration of alkali nitrates exceeds a certain value in each binary system.
