Reduced iron powder is used in thermal batteries

The Zr/ BaCr4 system heating paper was used as the heating source of hot battery in the early stage, but its poor conductivity after sintering, high resistance contact between electrode and fluid collector, external circuit is needed, and the static sensitivity of this system is large, there is potential danger in a large number of production processWith the research and development and efforts of later researchers, the final target is locked in the Fe/KClO4 system heating plate, which is composed of 80%-88% fine iron powder and KClO4 mixed and pressed, excessive iron powder to ensure that the heating plate after combustion of good electrical conductivity, to achieve the low resistance contact between the electrode and the fluid collector.

At present, in the new type of sheet heating sheet, heating paper is only used as the ignition strip and heating enclosure. In this case, the ignition strip is ignited by the ignition head, and then the ignition strip is lit in turn, and the heating sheet is the main heating source of the thermal battery.

Due to the advantages of small particle size, high surface area and good chemical activity, the reduced iron powder has higher combustion speed and lower ignition energy (the minimum energy required for ignition or detonation), and can be ignited and quickly melt electrolyte at a smaller voltage, shortening the reaction time of thermal battery discharge.