| The extensive deposits of talc occurring at Dagotha in Jaipur
district, at Ghewaria and Chandpura in Bhilwara district
and at Devpura in Udaipur district of Rajasthan have been
characterised mineralogically as well as industrially for
utilisation in the field of electroceramics. The study includes
the examination of general characteristics, chemical, mineralogical
and physical behaviour of talc from individual
sources to identify and estimate the quality of the mineral as
per BIS specification. The fired properties at four· different
temperatures starting from 1250° to 1400°C at an interval of
50°C with 2 hrs soaking at the peak temperatures were
found out so as to get all possible information for utilising
the mineral in the body-mix for high-frequency low-loss
steatite insulator. Investigations have also been made by
judtcial incorporation of talc separately in a typical composition
of electro-porcelain and then by evaluation of the
product at five different temperatures of 1200°, 1250°,
1300°, 1325° and 1350°C with two hours soaking each for
physical and electrical properties suitable for use in radio,
radar and other electronic devices. |
