自80年代初期以来,我们对激光法制备的纳米氮化硅的物理特性进行了一系列实验研究,发现了较多新的物理现象,如红外特征吸收峰畸变,红外金吸收特性,拉曼位移畸变等。本文首次对激光法制备的纳米非晶态氮化硅粉末及其加压成形块体的荧光光谱进行研究,提出了硅悬挂键作为陷阱中心和复合中心的荧光光谱新的作用机理。同时发现粉末压成块体时 Since the early 1980s, we have carried out a series of experimental studies on the physical properties of nanosized silicon nitride prepared by laser method. We have found many new physical phenomena such as the infrared absorption peaks, the infrared absorption characteristics, the Raman shift Distortion and so on. In this paper, the fluorescence spectra of nanosized amorphous silicon nitride powders and their compact formed by laser method are studied for the first time, and the new mechanism of the fluorescence spectra of silicon dangling bonds as trap center and recombination center is proposed. At the same time, it was found that the powder was pressed into blocks