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Volume crystallization of this glass is nucleated by Li3P04. On heating from room temperature, Li,SiO, appears around 650°C and then converts to LizSi205 around 850°C by reaction with SiOz from the melt. Preheating the glass at 1000°C forms larger Li3P04 nuclei that promote additional crystallization of cristobalite in the 650" to 850°C range. Crystallization activation energies calculated from scan-rate dependence of DTA peaks are 270 kJ/mol for Li2Si03 and 360 to 570 kJ/mol for Li2Si205.

Disintegration of tin cathodes at high current densities was studied in neutral, acid, and alkaline solutions of sulfuric acid and alkali and ammonium hydroxides, sulfates, and chlorides. The tin left the surface as SnH4 and the inormalo'normals were of the order of amp/cm2. Acid decreased the disintegration rate, salts added to acid increased the rate, salts added to neutral solution decreased the rate. The cation effect was specific, disintegration rates decreasing in the order sodium, potassium, lithium, ammonium, and hydronium ion.

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