Changes in structure and thermal properties with phosphate content of ternary calcium sodium phosphate glasses

Structures and dissolution behaviors of CaO–P2O5–TiO2/Nb2O5 (Ca/P ≥ 1) invert glasses

“…In the present work, however, T g values of the glasses increased with increasing the Ca/P ratio, and NC theor and NC exp decreased. A similar trend has been observed for some glass systems such as P 2 O 5 -MgO [25] and P 2 O 5 -CaO-Na 2 O [26]. Mandlule et al reported that this trend can be explained by the increase in ionic contribution in the glass structure [26].…”

“…A similar trend has been observed for some glass systems such as P 2 O 5 -MgO [25] and P 2 O 5 -CaO-Na 2 O [26]. Mandlule et al reported that this trend can be explained by the increase in ionic contribution in the glass structure [26]. Glasses with low phosphate content, i.e., invert glasses, formed their network by interactions between short phosphate units and modifier ions [26].…”

Preparation of Antibacterial ZnO-CaO-P₂O₅-Nb₂O₅ Invert Glasses

“…In addition, the increase in glass forming ability, along with the higher af nity of zinc to coordinate with phosphate groups (higher electronegativity) con rmed that Zn 2+ ion could crosslink phosphate groups together by forming P-O-Zn bonds and therefore acting as a network former 24,25) . 31 P MAS-NMR spectra of the glasses are shown in Fig. 3(A).…”

“…3(B)) 14,15) . They are characteristic of phosphate invert glasses, which structurally consist of short phosphate chains and charge balanced with cations 31,32) . The experimental spectra were deconvoluted, assuming that Q p 0 and Q p 1 species followed a Gaussian distribution.…”

Environmental impact of fertilizer use and slow release of mineral nutrients as a response to this challenge

“…Calcium phosphate glass-ceramic materials in the P 2 O 5 -CaO-SiO 2 -K 2 O and P 2 O 5 -CaO-Na 2 O systems were also prepared by the thermal treatment of various raw materials and they were fully examined and described in the literature 89 . As to the fl y ashes, it was shown 90 that nitrogen could be fi xed into fl y ashes through carbothermal reduction and nitridation reaction, and this new modifi ed material has the potential to be a source of slow release nitrogen fertilizer.…”