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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 21  1962
Glasses in the Syste.m. s PbO-B203-S03·and ZnO-B203-S03
PRANAB KUMAR GUPTA AND SACHCHIDANANDA KUMAR
Pages : 91-94
DOI : 10.1080/0371750X.1962.11011989
Abstract
In the systems Pb0-B20a-S03 and Zn0-B20rS03 clear and stable glasses containing upto about 20 mole per cent S03 were .obtained. Unlike the borate glasses, thin films of sulphate-containing, glasses show selective infra-red tram•mission around 12p.. Compared to the corresponding borate glasses, thermal expansion is higher. DC resistivity, dielectric constant and soft.ening temperature do not change significantly by replacing B20s with SOs. Addition of S03 ~mproves resistance of lead glasses to water attack but deteriorates zinc glasses.• Some of the glasses did not show any visible change after they were kept exposed to atmosphere for about a year.
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