半导体桥点火具药剂贮存寿命分析及评估

目的 对在贮存过程中的半导体桥火工品进行失效分析和寿命评估.方法 通过差示扫描量热法(DSC)对不同加速寿命实验时间的半导体桥点火具药剂进行分析,探究LTNR和亚铁氰化铅的药剂相容性.通过化学动力学,分析半导体桥点火具药剂在不同加速寿命实验时间的活化能.结果 LTNR和亚铁氰化铅均表现出良好的化学相容性,在短时间内不会...

Analysis and Evaluation of Storage Life of Semiconductor Bridge Ignition Agent

The reliability of semiconductor bridge igniter during storage affects whether the pyrotechnics can function safely. It is very important for the failure analysis and life evaluation of the semiconductor bridge igniter during storage. Differential scanning calorimetry (DSC) is used to analyze semiconductor bridge igniter agents with different accelerated life test times, it is found that both LTNR and lead ferrocyanide exhibit good chemical compatibility and will not change performance in a short period time. Through chemical kinetic analysis of the activation energy of the semiconductor bridge igniter agent at different accelerated life test times. The activation energy of the medicament decreases in the initial stage of storage, and the thermal decomposition rate of the medicament is relatively fast. With the extension of the storage time, the activation energy of the medicine will return to the initial state, and the thermal decomposition rate of the medicine will decrease. Affected by temperature during the storage process of the medicine, it is always accompanied by slow decomposition, which reduces the effective components of the medicine and causes a delay in the ignition time of the medicine. Because the failure mode of the semiconductor bridge igniter is the delay of the ignition time of the medicament, the ignition time of the medicament of the semiconductor bridge igniter is used as the key performance parameter. The trend line analysis method is used to evaluate the storage life of the semiconductor bridge igniter to be about 16 years.