9 research outputs found
Nanoscopic Study of the Ion Dynamics in a LiAlSiO Glass Ceramic by means of Electrostatic Force Spectroscopy
We use time-domain electrostatic force spectroscopy (TD-EFS) for
characterising the dynamics of mobile ions in a partially crystallised
LiAlSiO glass ceramic, and we compare the results of the TD-EFS
measurements to macroscopic electrical conductivity measurements. While the
macroscopic conductivity spectra are determined by a single dynamic process
with an activation energy of 0.72 eV, the TD-EFS measurements provide
information about two distinct relaxation processes with different activation
energies. Our results indicate that the faster process is due to ionic
movements in the glassy phase and at the glass-crystal interfaces, while the
slower process is caused by ionic movements in the crystallites. The spatially
varying electrical relaxation strengths of the fast and of the slow process
provide information about the nano- and mesoscale structure of the glass
ceramic.Comment: 5 pages, 4 figure