Song Chaofa, Xu Man. Glass Forming Region and Properties of Glasses in System B<SUB>2</SUB>O<SUB>3</SUB>-La<SUB>2</SUB>O<SUB>3</SUB>-BaO-Nb<SUB>2</SUB>O<SUB>5</SUB>[J]. Editorial Office of Optics and Precision Engineering, 1986,(6): 51-56
Song Chaofa, Xu Man. Glass Forming Region and Properties of Glasses in System B<SUB>2</SUB>O<SUB>3</SUB>-La<SUB>2</SUB>O<SUB>3</SUB>-BaO-Nb<SUB>2</SUB>O<SUB>5</SUB>[J]. Editorial Office of Optics and Precision Engineering, 1986,(6): 51-56DOI:
30. and 35wt% respectivelly. The refractive index dispersion and density of the glasses in the system were measured. Experimental results indicated that the glass forming region was shifted to poor—Nb
2
O
5
region with increasing of composition of B
2
O
3
. The vaoriting law of crystallizing
refractive index
dispersion and density of the glasses are discussed when SiO
2
and Al
2
O
3
is substituted for B
2
O
3
and BaO respectivelly. New optical glass La K713/538 has been developed on the basis of this work.