论文部分内容阅读
超微粉末是超微粒子的总称。超微粒子统指粒径为万分之一毫米到百万分之一毫米(10~(-4)～10~(-6)毫米)的细微粒子.粒子的粒径大于10~(-4)毫米的粉末通常叫做微粉。对于超微粒子来说,人的肉眼和性能最优的光学显微镜已不能分辨。这是因为,肉眼的最小分辨范围为0.1到0.2毫米,性能最优的光学显微镜最高分辨率为2000埃(1埃等于10~(-7)毫米).超微粉末只有在电子显微镜下才能显现原形.经过近廿年来的研究与摸索,对超微粉末的性能与应用方法有了初步了解,期望它在不久的将来有可能成为种类繁多的粉末材料的生力军。
Ultrafine powder is the general name of ultrafine particles. Ultrafine particles refer to fine particles with particle sizes of one ten thousandth of a millimeter to one millionth of a millimeter (10 -4 to 10 -6 mm) The powder of millimeter is usually called the fine powder. For the ultra-fine particles, the human eye and the best performance of the optical microscope can not distinguish. This is because the minimum visible range is 0.1 to 0.2 mm for the naked eye, and the highest performing optical microscope has a maximum resolution of 2000 angstroms (1 angstrom equals 10 to (-7) mm.) Ultrafine powders appear only under an electron microscope Prototype.After nearly 20 years of research and exploration, the performance of ultrafine powder and application of a preliminary understanding of the law, it is expected in the near future it may become a new force in a wide range of powder materials.