A Summary of the Observations and Facts Concerning the Phenomenon of Reboiling*

Abstract

The recent observations and generally accepted facts concerning the phenomenon of reboiling of enamels on sheet metals are listed concisely. Six photomicrographs are presented to show the outstanding characteristics of the enamels obtained by some of the treatments described in the paper. With no attempt at a final explanation, a series of the most obvious deductions to be drawn from the observations of the first portion of the paper is made. In conclusion, some of the various theories that have been expressed to explain reboiling arc mentioned and discussed.

Interfacial reactions between tellurite melts and silica during the production of microstructured optical devices

“…For the case of tellurite filling, such reactions may involve diffusion of tellurite species into the silica matrix, dissolution of silica in the tellurite melt, interfacial crystallization and phase separation. Secondly, process-induced volume reactions may occur such as increasing fictive pressure [3,4], the generation of structural anisotropy as a result of shear-flow [5,6], isotropic changes in network topology as a result of the applied body forces [7], solution and re-boiling of gases [8,9], or pressure and confinementdependent crystallization or phase separation processes [10]. In a first consideration, especially the interfacial reactions would lead to the occurrence of scattering centers inside the waveguide and, hence, to very high optical loss.…”