based on the aluminosilicate glass-matrix with the nano-phase of fluoride
is an interesting material for optoelectronics. A new glass from the SiO2–B2O3–Na2O–LaF3 system
in which nanocrystallization of LaF3 could be obtained
as well is presented.
Thermal stability of glass and the crystalline
phases formed upon heat treatment were determined by DTA/DSC and XRD methods,
respectively. The effect of the glass composition on thermal stability was
investigated by the SEM method.
It has been found that the addition
of LaF3 increases the tendency to decomposition of
the borosilicate glass. In glasses with the ratio B2O3/(Na2O+3La2F6)<1 it is possible to obtain the immersed crystallization
of LaF3 in transparent glassy matrix. The process is
preceded by LaOF formation. Glasses with the composition B2O3/(Na2O+3La2F6)≥1 revealed the tendency to La(BSiO5)