The measurements of optical properties of various carbon and graphite particles in the wavelength from near-to far-infrared.

本研究的目的是明确各种碳和石墨颗粒在旁波长区的光学性质与其共性之间的相关性。用透射电子显微镜观察了纳米粒子的尺寸、结晶度等一般特征，并在紫外-远红外波段测量了纳米粒子的吸收光谱。在远红外中，光谱指数β取决于结晶程度。从错误结晶的碳到最佳结晶的石墨，β随结晶度的增加而逐渐增加，从0.6到3.0。在中红外区，光谱指数与碳的结晶度没有相关性，这可能是由于不同方法合成的碳样品的微晶尺寸相差较大。在控制气体（He，Ar）压力的条件下，可以控制碳微晶的尺寸。在中红外区，碳的光谱指数β取决于微晶的结晶程度，即微晶平均尺寸从6 μ m增加到8 μ m时，β从0.6增加到1.2。冷却到He温度时，碳的光谱指数比室温时大，结晶良好。对于冷却到He温度的石墨，错误结晶的石墨结晶变得良好，但良好结晶的石墨没有改变。

This research aims at clearing the correlation between the optical properties and the general character for many kinds of various carbon and graphite particles in side wavelength region. The general character such as size, digress of crystallization of these particles were observed with TEM, These absorption's were measured in wide wavelength region from UV to far infrared. In far infrared, the spectral index βdepends on the degree of crystallization. The βincreases gradually from 0.6 to 3.0 as the degree of crystallization becomes good from carbon of wrong crystallization to graphite of best crystallization. In the mid infrared region, there is no correlation between the spectral index and the degree of crystallization, which might be due to large deviation of size of microcrystallites of carbon samples synthesized by different method. Under controlling the gas (He, Ar) pressure, the size of microcrystallites of carbon was controlled. In this case of carbon, the spectral index βdepends on the degree of crystallization in mid infrared region, that is, theβincrease from 0.6 to 1.2 as the average size of microcrystallites increases 6Åto 8Å.Cooled to He temperature, the spectral index of carbon becomes larger than that at room temperature and the crystallization become good. As for graphite cooled to He temperature, the crystallization become good for the wrong crystallization of graphite, but there is no change in the good crystallization of graphite.