Physical and Chemical Solubility of Nitrogen in Glass Melts

Abstract

Values for the physical solubility of nitrogen as well as for the content of chemically dissolved nitrogen in glass melts are given. The form in which the nitrogen is present in the glass melts is discussed and an attempt is made to explain chemical interaction between nitrogen and the glass melt. The dependence of the amount of physically or chemically absorbed nitrogen on the nature of the furnace atmosphere is shown. The results offer an explanation for the presence of nitrogen often observed in bubbles of commercial glasses.

Sialons and related nitrogen ceramics

“…% in oxide glasses are reported [39][40][41] to increase the softening temperature, viscosity, and the resistance to devitrification. Glasses with 10 at.…”

Dual speciation of nitrogen in silicate melts at high pressure and temperature: An experimental study

“…Under oxidizing conditions and at low pressure, nitrogen is dissolved as N 2 within the empty spaces of the silicate network and do not interact with it. Conversely, under reducing conditions nitrogen is chemically bound to the silicate (Mulfinger, 1966). Extremely reducing conditions are required, though, to reach these conditions at ambient pressure.…”

“…However, its behavior is quite different under reducing conditions (Mulfinger, 1966;Libourel et al, 2003;Miyazaki et al, 2004). For instance, other parameters being equal, nitrogen contents typically vary by 5 orders of magnitude as a function of the redox conditions within a MORB-like liquid (Libourel et al, 2003).…”

SiAlON glasses: Effects of nitrogen on structure and properties

“…2),4)-6),14)- 17) Oxynitride glasses have been prepared by bubbling nitrogen or ammonia through the relevant silicate liquid, 18) use of polymeric precursors yielding nitrides (see for example 19) ), or the most widely used method of dissolving either silicon nitride or aluminium nitride into a silicate or aluminosilicate liquid. More recently, extremely high nitrogen for oxygen substitution levels have been achieved 20) by incorporating the modifier as a metal in reaction mixtures rather than metal oxides as normally used for the solution of silicon or aluminium nitrides.…”