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진동밀에 의한 나노페이즈 타이타니아 분말의 제조
Preparation of Nanophase Titania Powder by Vibratory Milling
HWAHAK KONGHAK, June 1997, 35(3), 325-328(4), NONE
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Abstract
진동밀에 의한 분쇄가 TiO2 분말의 특성에 미치는 영향에 관하여 조사함으로써, 나노페이즈 타이타니아 입자의 제조 가능성을 검토하였다. 평균 입자 크기는 분쇄전 3.42㎛에서 분쇄 초기에는 크게 감소하다가 0.2㎛의 일정한 값에 접근하였으며, 입도 분포는 분쇄 시간이 길어질수록 점차 좁은 분포를 가졌다. X선 회절 도형 관찰 결과 분쇄 시간에 따라 회절선의 폭이 점점 넓어짐이 관찰되었다. 결정자의 크기는 분쇄전의 600㎚에서 분쇄초기에 급속히 감소하다가 대략 20㎚에 접근하는 반면, 불균일 변형률은 분쇄 시간에 따라 계속 증가하는 경향을 보임을 알 수 있었다. 따라서, TiO2 분말을 진동밀에서 분쇄하여 나노페이즈 크기의 분말을 제조할 수 있음을 확인할 수 있었다.
The possibility of preparing nanophase titania powder was examined by investigating the effect of vibratory milling on the characteristics of TiO2 powder. The starting powder with a mean particle size of 3.42㎛ showed a fast rate of particle size-reduction at the early stage of milling. By further milling, the milling rate decreased significantly and the mean particle size approached a constant value of 0.2㎛. Prolonged milling produced narrower particle size distribution. According to XRD results, it was observed that the diffraction lines became broader with increasing milling time. The crystallite size of 600 ㎚ at a starting powder decreased rapidly at the early stage of milling and it approached nanophase region of about 20 ㎚. Nonuniform strain increased continuously with milling time. The results show that nanophase titania powder was prepared by vibratory milling.
Keywords
References
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Kerr MC, Reed JS, Am. Ceram. Soc. Bull., 71(12), 1809 (1992)
Padden SA, Reed JS, "Grinding Kinetics and Media Wear during Attrition Milling,", 72(3), 101 (1992)
Summers W, Am. Ceram. Soc. Bull., 62(2), 212 (1983)
Hwang KH, Park JH, Kim EH, J. Korean Ceram. Soc., 31(4), 448 (1994)
Hart LD, Hidson LK, Am. Ceram. Soc. Bull., 43(1), 13 (1964)
Tashiro S, Sasaki N, Tsuji Y, Jpn. J. Appl. Phys., 26, 142 (1987)
Morosin B, Graeber EJ, Graham RA, Adv. X-Ray Anal., 27, 379 (1983)
Cho TH, Song KS, Lee YM, Song JT, J. Korean Ceram. Soc., 30(3), 222 (1993)
Cullity BD, "Elements of X-Ray Diffraction," Addison-Wesley, 281 (1978)
한봉희, "X선 회절의 기초," 동명사, 214 (1983)
"Instruction Manuals D/Max System Application Software Crystallite Size and Nonuniform Strain Program," Rigaku Corporation
Buchanan DR, Miller RL, J. Appl. Phys., 37(11), 4003 (1966)
