| A study has been made of the suitability of Indian lepidolite as a flux for the development
of semi-vitreous and vitreous bodies at comparatively low temperatures.
Substitution of felspar by lepidolite not only reduced the maturing temperature but
appreciably increased the mechanical strength and maturing range. This improvement
was all the more pronounced with increasing flux content. A combination of lepidolite,
felspar and talc was found to be ideally suited for the development of vitreous and semivitreous
bodies at temperatures lying between cone OJ and 2 and having a firing
range good enough for commercial firing. There was however, no appreciable effect
on thermal expansion. |
