CAJ | 학술논문

研究了热电池用Zr-BaCrO_4加热纸(锆粉加热纸)的燃烧机理.X射线衍射光谱法(XRD)物相分析表明,在Zr-BaCrO_4加热纸中,若Zr粉量不足,则燃烧后物相成分为BaZrO_3和CrO;若Zr粉过量,物相成分还包括Zr_2O.在Zr粉量不足的加热纸中,燃烧包含Zr和BaCrO_4发生氧化还原反应生成BaZrO_3和CrO,及BaCrO_4分解的两个反应;在Zr粉过量的加热纸中,燃烧包含Zr和BaCrO_4发生氧化还原反应生成BaZrO_3和CrO,及产物为BaO,CrO和Zr_2O的另一个氧化还原反应.计算得Zr粉过量时加热纸燃烧产物中Zr_2O的标准焓变值△_fH_(Zr_2O(s))~θ约在-1 290～-1 296kJ/mol范围;经热重-差热分析(TG/DSC)、理论计算及加热纸灰烬于1 200℃氧化后的物相分析都证实其热稳定性高于1 200℃.Zr-BaCrO_4加热纸燃烧机理的确定有助于精确设计加热纸成分、控制电池输入热量、提高电池质量及安全性,并为电池的数字化设计提供有效参数.
연구료열전지용Zr-BaCrO_4가열지(고분가열지)적연소궤리.X사선연사광보법(XRD)물상분석표명,재Zr-BaCrO_4가열지중,약Zr분량불족,칙연소후물상성분위BaZrO_3화CrO;약Zr분과량,물상성분환포괄Zr_2O.재Zr분량불족적가열지중,연소포함Zr화BaCrO_4발생양화환원반응생성BaZrO_3화CrO,급BaCrO_4분해적량개반응;재Zr분과량적가열지중,연소포함Zr화BaCrO_4발생양화환원반응생성BaZrO_3화CrO,급산물위BaO,CrO화Zr_2O적령일개양화환원반응.계산득Zr분과량시가열지연소산물중Zr_2O적표준함변치△_fH_(Zr_2O(s))~θ약재-1 290～-1 296kJ/mol범위;경열중-차열분석(TG/DSC)、이론계산급가열지회신우1 200℃양화후적물상분석도증실기열은정성고우1 200℃.Zr-BaCrO_4가열지연소궤리적학정유조우정학설계가열지성분、공제전지수입열량、제고전지질량급안전성,병위전지적수자화설계제공유효삼수.
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.