| The utility of polarization microscopy in different branches of glass and ceramic has been
discussed. Beside identification of different constituents, and evaluation of the raw materials,
petrographic studies ~ay help in explaining anomalous observations and in correlating properties.
The role of impurities has been discussed quoting a few examples. In the study of
stones in glass, petrography is extended from identification to locating the source of the
defect. It may ensure a control over quality during production as also over the degree of
firing of some ceramic materials. |
