Nonisothermal nucleation in the CuCl solid solution in glass: Dissolution of subcritical CuCl nuclei with a positive jump of the nucleation temperature

Nonisothermal nucleation in the CuCl solid solution in glass: Nucleation under continuous cooling of the solid solution

“…After the nucleation during cooling of the sample, the fundamental absorption spectra of CuCl nanoc rystals were measured and the kinetics of their melting was investigated using the exciton thermal analysis (ETA). The ETA technique was described in [10]. It is important to note that the ETA method makes it pos sible, with a higher resolution, to determine the trans formation of the particle radius distribution of the CuCl phase in glass upon complicated annealing.…”

“…In order to determine the size distributions of CuCl particles (distributions D1 and D2), these same sam ples were examined using the ETA method [10]. As an example, Fig.…”

“…TECHNIQUE, AND RESULTS As the model solid solution, we used the CuCl solid solution in glass of the same composition as in [10,11]. After the nucleation during cooling of the sample, the fundamental absorption spectra of CuCl nanoc rystals were measured and the kinetics of their melting was investigated using the exciton thermal analysis (ETA).…”

“…Under nonisothermal conditions, changes in the supersatu ration and critical radius are caused by both the nucle ation and variation in the temperature, which makes it possible to control the growth of a new phase and to obtain new data for the development of the nucleation theory. In [10], it was shown that an abrupt change in the critical radius for the CuCl nanomelt in glass with a nucleation temperature jump from 500 to 650°C leads to the dissolution of CuCl phase nuclei in the sample. In [11], it was found that, in the case of a neg ative temperature jump during the nucleation (from 700 to 500°C), there can arise two distributions of CuCl nanoparticles in glass with significantly different average sizes.…”

“…Experimental investigations of the kinetics of nucleation on model solutions were also performed at a fixed temperature [4][5][6][7][8][9] or with a temperature jump [10,11]. Under nonisothermal conditions, changes in the supersatu ration and critical radius are caused by both the nucle ation and variation in the temperature, which makes it possible to control the growth of a new phase and to obtain new data for the development of the nucleation theory.…”