The thermal reaction and the combustion of an ammonium perchlorate(AP)-sodium nitrate(SN)-aluminum(Al)-GAP-catalyst
solid propellant were studied by a thermal analysis, combustion experiments and analyses of the reaction residue in
order to clarify the catalytic effect of iron oxide, copper oxide and cobalt oxide catalysts. The results obtained are as follows.
Iron oxide, which has a catalytic effect on ammonium perchlorate and a AP-Al-GAP solid propellant decomposition,
had no effect on the thermal reaction of the mixture of ammonium perchlorate with sodium nitrate and the AP-SN-Al-GAP
solid propellant. Cobalt oxide and copper oxide had a catalytic effect on the low temperature decomposition of ammonium
perchlorate in the mixture of ammonium perchlorate and sodium nitrate at atmospheric pressure, but had no effect on the
thermal reaction of the AP-SN-Al-GAP solid propellant under pressurized conditions.
With regard to the combustion, iron oxide had no catalytic effect on the AP-SN-AI-GAP composite solid propellant.
The formation of sodium perchlorate, which is more stable compared to ammonium perchlorate, is one of the reason for this
phenomenon. The addition of a copper oxide catalyst increased the burning rate by 5-15 % compared to that without a catalyst,
but cobalt oxide showed no catalytic effect on a sodium nitate containing propellant combustion under pressurized conditions.
過塩素酸アンモニウム−硝酸ナトリウムの混合物および過塩素酸アンモニウム−硝酸ナトリウム−アルミニウム−GAP系固体推進薬の熱反応性および燃焼反応性に及ぼす金属酸化物触媒の効果を，熱分析法，燃焼残留物の分析および燃焼実験などにより検討した。
過塩素酸アンモニウム単独の熱分解触媒である酸化鉄は，過塩素酸アンモニウムと硝酸ナトリウム混合物および過塩素酸アンモニウム−硝酸ナトリウム−アルミニウム−GAP系固体推進薬の熱反応には触媒効果を持たなかった。酸化コバルトと酸化銅は過塩素酸アンモニウムと硝酸ナトリウム混合物の常圧下での低温分解には触媒効果を示したが，加圧下での過塩素酸アンモニウム−硝酸ナトリウム−アルミニウム−GAP系固体推進薬の熱反応には効果を持たなかった。
酸化鉄は過塩素酸アンモニウム−硝酸ナトリウム−アルミニウム−GAP系固体推進薬の燃焼にも触媒効果を持たなかった。これは反応過程で過塩素酸アンモニウムよりも安定な過塩素酸ナトリウムの生成によると推定された。酸化コバルトは硝酸ナトリウムを含む推進薬の燃焼には触媒効果を持たなかった。酸化銅は硝酸ナトリウムを含む推進薬の燃焼速度を5〜15 % 増加させ，若干の触媒効果を示した。