论文部分内容阅读
超微粒子新材料,已在许多方面有着广泛的应用,如传感器、陶瓷、信息存贮材料等。超微粒子的特性,包括表面效应和体积效应两方面。表面效应是指超微粒子的表面原子数与总原子数之比随粒径的变小而急剧增大。表面原子的晶场环境和结合能与内部原子不同,具有很大的化学活性,晶体场的微粒化伴有这种活
Ultrafine particles of new materials, in many ways has a wide range of applications, such as sensors, ceramics, information storage materials. The properties of ultrafine particles include both surface and volume effects. The surface effect refers to the ratio of the number of surface atoms to the total number of atoms of the ultrafine particles sharply increasing as the particle size decreases. The surface atoms of the crystal field environment and the binding energy and the internal atoms are different, with great chemical activity, the crystal field of micronized with this activity