Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Thermal Decomposition Behavior of Boron-Potassium Nitrate (BKNO3) by TGA

열중량분석법에 의한 Boron-Potassium Nitrate(BKNO3)의 열분해 특성 연구

  • Received : 2018.11.02
  • Accepted : 2019.03.05
  • Published : 2019.04.01
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Abstract

The thermal decomposition characteristics of boron-potassium nitrate ($BKNO_3$) were investigated by non-isothermal thermal gravimetric analysis (TGA). Two steps of mass loss were observed in the temperature range between room temperature and $600^{\circ}C$. Kinetic parameters of the thermal decompositions were evaluated from the measured TGA curves using the AKTS Thermokinetics Software. For the first step of mass loss ($220-360^{\circ}C$) corresponding to the thermal decomposition process of the binder (Laminac/Lupersol), the activation energy is in the range of approximately 120-270 kJ/mol when evaluated by Friedman's iso-conversional method, while the value of activation energy varies in the range of approximately 150-400 kJ/mol during the second step process ($360-550^{\circ}C$).

붕소-질산칼륨($BKNO_3$)의 열분해특성을 비등온방식의 TGA(열중량분석법)를 사용하여 평가하였다. 상온과 $600^{\circ}C$의 온도범위에서 2단계에 걸쳐 질량감소가 발생하는 것이 관찰되었다. 열분해특성에 대한 속도론적 파라메타값들은 TGA로부터의 데이터를 AKTS Thermokinetics 소프트웨어를 사용하여 분석되었다. $200^{\circ}C$에서 $360^{\circ}C$의 온도범위에서 발생하는 1차 무게감소는 바인더 (Laminac/Lupersol)의 열분해에 해당하며, Friedman의 등전환법으로 분석되는 경우 활성화에너지는 120에서 270 kJ/mol 사이의 값을 가진 반면에 2차감소 영역($360-550^{\circ}C$)에서의 활성화에너지 값은 150에서 400 kJ/mol의 범위 내에 있었다.

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References

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