Determination of Mean Diameter and Size Distribution of Nano-size Powder by X-ray Powder Diffraction

• Main Authors: Ping-Chung Lee, 李秉中
• Other Authors: Wen-Hsien Li
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/64294980009145925849

碩士 === 國立中央大學 === 物理研究所 === 91 === Finite size X-ray diffraction theory was used to determine the mean particle diameter and size distribution of powders composed of nano-scale particles. The X-ray diffraction patterns were analyzed assuming a single size as well as multi sizes for the powder. Better fits were frequently obtained when a size distribution for the powder was assumed, as expected. Gaussian and Lognormal distributions were then considered. Through the process, we were able to determine the size distribution of the powder by using the x-ray diffraction pattern. Comparisons of the results to that obtained from the AFM images were also presented.