【摘要】 比较了扫描电子显微镜和原子力显微镜的原理及特点,得出了AFM的独特优势。用AFM对煤的表面微形貌进行了三维测量,观测到煤中的颗粒和气孔,气孔形状以圆形为主,其次有椭圆形,且边缘光滑,轮廓清晰,据AFM分析,平均气孔孔径为92.25nm,最小孔径10nm,最大孔径800nm。结论表明,用AFM可以观测到煤真实、精确的表面微形貌,为分析瓦斯分子在煤孔隙中的分布提供了一种研究和测量方法。更多还原

【Abstract】 This paper compares the principle and characteristic of scanning Electron Microscope(SEM)with Atomic ForceMicroscope(AFM),and the unique advantages of AFM are gotten.It is used to three-dimensional measurement of the coal’ssurface micro-structure,and obeserved results are that the granules and pores of coal are obeserved.The Shape of pores ismainly circle,secondly is ellipse,and their edges is slick,outline is pure.Measuring results are that average aperture is 92.25nm,minimum is 10nm,and maximum is 800nm analyzed by AFM.The obtained results demonstrate the AFM can get thetrue and precise micro-structure of coal.It supplies a studying and measuring method for analyzing the distribution of fire-damp molecular in pore space of coal.更多还原