Opacity of crystallization of low-alkali glasses

Effect of adding phosphorus oxide on the dilatometric properties of silicate container glasses

“…On the whole, the effect of phosphorus oxide on the basic physical-chemical properties of glasses is not unique. It is determined by the concentration of P 2 O 5 and the chemical composition of the matrix glass, primarily by the presence of alkali oxides and Al 2 O 3 in the glass [4,5].Silicophosphate glasses are systems with two glassforming cations, each of which can form its own characteristic anionic motif. Phosphorus is a stronger cation than silicon (according to the data in [6], the ionic radii of Si and P are 0.039 and 0.035 nm, the energy of the Si -O bond is 443 kJ/mole and the energy of the P -O is 464 kJ/mole, the coordination number of Si and P is 4).…”

“…On the whole, the effect of phosphorus oxide on the basic physical-chemical properties of glasses is not unique. It is determined by the concentration of P 2 O 5 and the chemical composition of the matrix glass, primarily by the presence of alkali oxides and Al 2 O 3 in the glass [4,5].…”