화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.26, No.2, 145-153, April, 2015
Export Citation
Cr2O3/AP 복합체 제조 및 그 열분해 특성
Preparation of Cr2O3/AP Composites and their Thermal Decomposition Characteristics
정재윤, 김재경, 심홍민, 김현수1, 구기갑†
  • 서강대학교 화공생명공학과
  • 1국방과학연구소
Jae-Yun Jung, Jae-Kyeong Kim, Hong-Min Shim, Hyoun-Soo Kim1, and Kee-Kahb Koo†
  • Department of Chemical and Bimolecular Engineering, Sogang University, Seoul 121-742, Korea
  • 1Agency for Defense Development, Daejeon 305-600, Korea
E-mail:
초록
Solvent/anti-solvent법으로 제조된 Cr2O3/과염소산암모늄 에너지 복합체의 X선 회절 분석 결과 Cr2O3이 내포된 과염소산암모늄 입자는 순수한 과염소산암모늄과 동일한 결정 구조로 확인되었으며 주사전자현미경 사진으로부터 측정된 입방체 형상 결정의 평균입도는 약 2.5 μm이었다. 복합체의 열중량 분석으로부터 Cr2O3에 의해 과염소산암모늄의 고온 분해 영역 분해 온도가 낮아짐을 알 수 있었고, 복합체 분해 반응의 활성화 에너지는 Starlink 방법에 의해 계산되었다. 이와 같은 활성화 에너지의 변화로 인하여, 과염소산암모늄의 분해 반응 메카니즘은 전환율 약 0.25까지는 주로 핵생성에 의한 다공성 구조가 생성되면서 분해되는 것으로 보이며, 전환율 0.3 이상에서는 과염소산암모늄의 격렬한 분해 반응이 승화보다 우선하는 것으로 보인다.
Cr2O3/AP (ammonium perchlorate) energetic composites were prepared by a method of solvent/anti-solvent. XRD analysis revealed that the crystalline structure of AP in Cr2O3/AP composites is the same as that of pure AP. SEM photomicrograph shows that an average size of cuboid Cr2O3/AP composites is approximately 2.5 μm. TGA analysis shows that the addition of submicron Cr2O3 particles into AP lowers the HTD (high-temperature decomposition) compared to that of neat AP and the activation energy of the Cr2O3/AP composites was calculated by the isoconversional Starlink method. Considering changes in the activation energy, the decomposition reaction mechanism of AP was suggested as follows; the decomposition with the formation of nucleation sites renders formation of porous structure in the composites up to conversion of about 0.25 and after further conversion of over 0.3, it seems that decomposition reaction vigorously takes place rather than sublimation of AP.
Keywords:ammonium perchlorate;Cr2O3/AP energetic composites;decomposition
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