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Table 1 Chemical composition of the synthesized high-alkaline borosilicate glasses

From: Modification of borosilicate glass composition for joint thermal processing with lead oxide glasses for development of photonic crystal fibers

Oxide Glass code
  NC-17 NC-18 NC-19 NC-20 NC-21A
  [%mol] [%mas] [%mol] [%mas] [%mol] [%mas] [%mol] [%mas] [%mol] [%mas]
\(\hbox {SiO}_{2}\) 54.99 49.41 56.00 51.44 55.94 51.44 56.60 54.46 56.84 55.00
\(\hbox {B}_{2}\hbox {O}_{3}\) 22.00 22.91 22.00 23.42 22.79 24.29 23.08 25.74 23.19 26.00
\(\hbox {Al}_{2}\hbox {O}_{3}\) 0.61 0.93 0.61 0.95 0.61 0.95 0.61 0.99 0.61 1.00
BaO 4.90 11.24 3.00 7.04 3.19 7.50 0.41 0.99
\(\hbox {Li}_{2}\hbox {O}\) 5.01 2.24 5.00 2.29 5.00 2.29 6.20 2.97 6.23 3.00
\(\hbox {Na}_{2}\hbox {O}\) 9.00 8.35 9.00 8.53 8.99 8.53 9.48 9.41 9.51 9.50
\(\hbox {K}_{2}\hbox {O}\) 3.50 4.92 4.40 6.33 3.47 5.00 3.62 3.63 3.63 5.50