지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 원창환
- 발행연도
- 2014
- 저작권
- 충남대학교 논문은 저작권에 의해 보호받습니다.
이용수1
이 논문의 연구 히스토리 (2)
- 이 논문의 후속연구가 궁금하신가요?
- 연관 학술논문 또는 학술발표를 통해 보다 발전된 연구결과를 확인하실 수 있습니다.
- 이 논문의 연구 히스토리 확인하기
초록· 키워드
오류제보하기
Zirconium boride is an artificial or which is rarely found in the nature. ZrB2 is a popular material in the hard material industry because it has high melting point, excellent mechanical properties and chemical stability.There are two known methods to synthesize ZrB2. First is direct reaction between Zr and B, and second is reduction of metal halogen. However, these two methods are recognized as not proper method for the mass production.
SHS(Self-propagating High-temperature Synthesis) is an efficient and economic method to synthesize hard materials because it uses exothermic reactions. In this paper ZrB2 was successfully synthesized with ZrO2, Mg and B2O3 by using SHS. Because of high combustion temperature and fast combustion speed in stoichiometric ratio of ZrO2, Mg and B2O3, single phase ZrB2 was not synthesized. In order to solve the temperature problem, excess of Mg and NaCl, were investigated as a diluent. From the experiments it was found that both diluents effectively stabilized the reaction and combustion regime. The final product from the optimum condition had sigle phase ZrB2 with 0.1~0.9um of particlesize.
SHS(Self-propagating High-temperature Synthesis) is an efficient and economic method to synthesize hard materials because it uses exothermic reactions. In this paper ZrB2 was successfully synthesized with ZrO2, Mg and B2O3 by using SHS. Because of high combustion temperature and fast combustion speed in stoichiometric ratio of ZrO2, Mg and B2O3, single phase ZrB2 was not synthesized. In order to solve the temperature problem, excess of Mg and NaCl, were investigated as a diluent. From the experiments it was found that both diluents effectively stabilized the reaction and combustion regime. The final product from the optimum condition had sigle phase ZrB2 with 0.1~0.9um of particlesize.
목차
1.서론 52.이론적 배경 62-1 초고온 세라믹스 62-1-1 ZrB2의 특성 102-1-2 ZrB2의 합성 13가. Reduction process 13나. Chemical route 15다. Reactive process 162-2 자전연소합성법 172-2-1 고온 자전연소합성(Self-Propagating High Temperature Synthesis, SHS) 172-2-2. SHS의 열역학(thermodynamics) 182-2-3. 연소 속도 및 활성화 에너지 202-2-4. SHS 반응 속도론(Kinetics) 21 2-2-5 자전연소합성 공정의 변수 243. 실험방법 273-1 출발원료 273-2 자전연소 고온반응장치 273-3 시료의 혼합 및 성형 293-3-1 ZrO2 + B2O3 + Mg 293-3-2 ZrO2 + B2O3 + Mg + NaCl 293-4 분석 및 측정 324. 결과 및 고찰 334-1 ZrO2 + B2O3 + Mg 334-1-1 열역학 분석 334-1-2 연소온도 분포 & XRD 분석 354-2 ZrO2 + B2O3 + Mg + NaCl 384-2-1 열역학 분석 384-2-2 연소온도 분포 & XRD & SEM 분석 405. 결론 44Reference 45ABSTRACT 49
최근 본 자료
댓글(0)
0