摘要
Abstract
The thermal battery used Zr-BaCrO_4 heat paper combustion mechanism has been studied. It is identified by X-ray diffraction (XRD) analysis that the main compositions of the combustion products are BaZrO_3 and CrO when zirconium powder mass is insufficient, otherwise, the main compositions are BaZrO_3, CrO and Zr_2O. When zirconium powder mass is insufficient, the Zr-BaCrO_4 heat paper combustion mechanism are Zr+BaCrO_4→BaZrO_3+CrO+△H and BaCrO_4→BaO+CrO+O_2↑+△H, otherwise, its depends on reactions of Zr+BaCrO_4→BaZrO_3+CrO+△H and 4 Zr+BaCrO_4→BaO+CrO+2 Zr_2O +△H. When zirconium powder mass is excessive, Zr_2O is one of the main results, which calculated standard formation enthalpy value (△_fH_(Zr_2O(s))~θ) range is from - 1 290 kJ/mol to -1 296 kJ/mol. The thermal stability of Zr_2O is very high, which has been verified by TG/DSC analysis, thermodynamic calculations and X-ray diffraction (XRD) analysis when the combustion ashes were oxidized at the temperature of 1 200 ℃. Once the combustion mechanism has been verified, Zr-BaCrO_4 heat paper combustion heat output can be designed and calculated accurately, and then the thermal batteries performance and safety can be improved greatly.关键词
热电池/Zr-BaCrO_4加热纸/锆粉加热纸/燃烧机理/标准生成焓Key words
thermal battery/ Zr-BaCrO_4 heat paper/ combustion mechanism/ standard formation enthalpy分类
信息技术与安全科学
