The mixture of sodium chlorate with iron powder has been used as a base material for an oxygen generating agent during
emergencies. In this study, a thermal analysis, an analysis of reaction residue and combustion experiments such as
combustion calorimetry or burning rate measurements were carried out to clarify the thermal reaction and combustion
reaction of the sodium chlorate - iron powder mixture.
The binary mixture, which contained fine iron powder, had a good reactivity at low temperature and the
capability of large oxygen release. The binary mixtures consisting of sodium chlorate and fine iron powder were combustible
over a wide range of iron content from 20-to 60 wt.% iron. Iron oxide had a large catalytic effect on the thermal
reaction of the binary mixture. However, the catalytic effect on combustion depended on the species of iron oxides.
Fe203 with fine particle size had a large catalytic effect. The addition of diatomaceous earth,
sodium perborate and strontium peroxide also increased the linear burning rate. Moreover, diatomaceous earth improved
the reproducibility of the linear burning rate.
塩素酸ナトリウム−鉄系粗成物は緊急脱出用の酸素ガス発生剤の主剤として用いられている。本研究では，この組成物の熱反応および燃焼反応性を，熱分析法，燃焼残留物の分析および燃焼試験などにより検討した。
微粒子の鉄粉を用いた塩素酸ナトリウム−鉄系組成物は，他の鉄粉を用いた組成物よりも低温で反応し，酸素ガス発生能力も大きかった。この二成分系組成物は，粒子径が1.36 μm の細かい鉄粉を用いた場合，鉄の含有量が20〜60 wt.%の広い範囲で燃焼可能であった。酸化鉄，珪藻土，過ホウ酸ナトリウムおよび過酸化ストロンチウムの添加は燃焼速度を増大させた。
また，珪藻土の添加は燃焼速度の再現性を向上させた。