Title :
Microwave assisted ion exchange in silicate glass
Author :
Willert-Porada, M. ; Park, H.-S.
Author_Institution :
Univ. of Bayreuth, Bayreuth, Germany
Abstract :
Distribution of electrical field gradients developing upon microwave heating glass parts immersed in an alkaline salt melt is analyzed by simulation. It is assumed that such gradients influence the process of ion exchange between the molten salt and the silicate glass immersed in it. It is shown that strong E-field gradients exist between the melt and the solid glass which could enhance ion transport due to an electro-migration effect superimposing the concentration gradient. In addition, interaction of the solid glass with microwave radiation could facilitate stress relaxation in the glass, which upon thermally induced ion exchange is retarding diffusion of alkali ions. A special microwave applicator has been developed which enables equilibration of inhomogeneous electromagnetic field distribution by mechanical movement of the samples subjected to ion exchange in order to analyze the overall effect of electromagnetic filed influence on ion exchange phenomena.
Keywords :
electromagnetic fields; glass; ion exchange; microwave heating; stress relaxation; alkali ions; inhomogeneous electromagnetic field distribution; microwave applicator; microwave assisted ion exchange; microwave radiation; silicate glass; stress relaxation; thermally induced ion exchange; Artificial intelligence; Chemicals; Electromagnetic heating; Indexes; Optical polarization; Photonics; Resistance heating; EM-simulation; Microwave heating; microwave coupling; silicate glassy material; transport phenomena;
Conference_Titel :
Microwave Symposium (IMS), 2014 IEEE MTT-S International
Conference_Location :
Tampa, FL
DOI :
10.1109/MWSYM.2014.6848356