2단계 반응에 의한 마그네타이트 나노입자의 제조
(주)코리아스칼라
- 최초 등록일
- 2016.04.01
- 최종 저작일
- 2008.04
- 8페이지/ 어도비 PDF
- 가격 4,000원
* 본 문서는 배포용으로 복사 및 편집이 불가합니다.
서지정보
ㆍ발행기관 : 한국분말야금학회
ㆍ수록지정보 : 한국분말야금학회지 / 15권 / 2호
ㆍ저자명 : 신대규, 류도형
영어 초록
Nano magnetite particles have been prepared by two step reaction consisting of urea hydrolysis and ammonia addition at certain ranges of pH. Three different concentrations of aqueous solution of ferric () and ferrous () chloride (0.3 M-0.6 M, and 0.9 M) were mixed with 4 M urea solution and heated to induce the urea hydrolysis. Upon reaching at a certain pre-determined pH (around 4.7), 1 M ammonia solution were poured into the heated reaction vessels. In order to understand the relationship between the concentration of the starting solution and the final size of magnetite, in-situ pH measurements and quenching experiments were simultaneous conducted. The changes in the concentration of starting solution resulted in the difference of the threshold time for pH uprise, from I hour to 3 hours, during which the akaganeite (-FeOOH) particles nucleated and grew. Through the quenching experiment, it was confirmed that controlling the size of -FeOOH and the attaining a proper driving force for the reaction of -FeOOH and ion to give are important process variables for the synthesis of uniform magnetite nanoparticles.
참고 자료
없음
"한국분말야금학회지"의 다른 논문
더보기 (5/10)