Reduction of explosion hazard of silver oxalate-Part II: Gram-Scale Explosion Hazard Analysis

摘要

Printed electronics is a rapidly developed technique (for creating electrical devices on various substrates). Nanoparticles deposited from silver oxalate solutions are promising materials for this purpose. In the preceding report [Part I], it has been shown that the rather high reactivity of silver oxalate can be decreased to some extent by moistening in n-decane. In the present study [Part II], the following explosion tests were performed for the safety check: (1) Pressure vessel test, (2) underwater explosion test, and (3) steel pipe detonation test. In the explosion evaluation on a gram-scale, silver oxalate was equivalent to 1.8% TNT. In the dry state, silver oxalate vigorously exploded at ca. 200 ℃, which smashed the aluminum container to fine pieces. For comparison, silver oxalate moistened with n-decane was similarly tested by just increasing temperature, and also by use of high explosives. In both cases, the explosion power was smaller than the case without n-decane. No cases without explosion have so far been found. Thus, much attention is needed for dealing with silver oxalate on a large scale.