The Mechanical Relaxation of Alkali Ions in a Borosilicate Glass

JSGT 1955 V39 T385-T393

The mechanical relaxation of the alkali ions in "Pyrex" brand borosilicate glass can be differentiated from the relaxation of the network-forming ions, and the connection between the former effect and the dielectric relaxation of the same group of ions is described. Experimental measurements are analysed to show the distribution of relaxation periods in the system. The peaks in the relaxation spectra are narrower in the case of chilled glass, but show no significant change in width with temperature, thus suggesting that only a small range of activation energies governs the relaxation proc

P. L. Kirby