Low temperature processes during the synthesis of lanthanum lead borosilicate glasses

Abstract

Low temperature processes during the synthesis of PbO-B 2 O 3 -SiO 2 -La 2 O 3 glasses were studied by thermal analysis of the batch mixture of glasses and X-ray powder diffraction analysis of samples that crystallized during invesrtigations of the crystallization ability of the synthesized glasses. The obtained results and available thermodynamic data indicate the formation of PbO·B 2 O 3 , PbO·2B 2 O 3 and La 2 O 3 ·B 2 O 3 ·SiO 2 in the temperature interval 400-700°C.