Structure and properties of zinc aluminophosphate glasses and those doped with zirconium dioxide

The white light emission properties of Tm 3+ /Tb 3+ /Sm 3+ triply doped SrO–ZnO–P 2 O 5 glass

“…Takebe et al reported that ZnO is widely used to improve the chemical stability of phosphate glasses [13], performing as an intermediate oxide since Zn 2+ owns large ion radius and electronic configuration with 18 outer-shell electrons [14]. Zn 2+ can form either [ZnO 4 ] tetrahedron or P-O-Zn bridges via phosphate chains linkages in the glass network structure [15,16] and improve the thermal stability of phosphate glasses. Likewise, the addition of SrO in pure phosphate glass can significantly improve the thermal properties due to the formation of meta-phosphate structure [17].…”

Insertion of Al2O3 in Zinc Metaphosphate Glasses: New Insights from 1D/2D Solid State NMR

“…Aluminophosphate glasses have been widely studied since the 1940s when Kreidl reported that Al 2 O 3 additions (even at low amounts) significantly improve the chemical durability of standard phosphate glasses. − This type of glass appeared thus as very promising systems and were used in many technical applications. − In order to understand how Al 2 O 3 additions improve the glass characteristics and durability, many studies were devoted to the structural characterization of this type of glass. It is now clearly established that P atoms adopt a tetrahedral configuration whereas Al atoms can be found under four-, five-, or six-fold coordinated units (denoted in the following as [4] Al, [5] Al, and [6] Al).…”

“…Such correlation NMR techniques have been widely applied to alkali aluminophosphate glasses, ,,− but there is, to the best of our knowledge, only a very few number of publications dedicated to the structural characterization of divalent oxide aluminophosphate glasses by 1D/2D NMR . In this paper, we choose to investigate zinc aluminophosphate glasses because this system has been used as based formulation to develop materials involved in many strategic technical applications. ,,, …”

“…19 In this paper, we choose to investigate zinc aluminophosphate glasses because this system has been used as based formulation to develop materials involved in many strategic technical applications. 8,11,20,21 A combination of 1D/2D NMR sequences was used in this study to understand how Al atoms alter the structure of zinc metaphosphate (50ZnO−50P atoms was first analyzed using high resolution 1D 27 Al NMR spectra recorded at high field (18.8 T). Presence of Al−O−Al bonds was traced using the 1D version of the double quantum− simple quantum (DQ−SQ) NMR correlation sequence 22 (Figure 1a).…”

Espectroscopía óptica de fosfato de Zn-Li-Al activado con Tb3+ y Eu3+ para aplicaciones de leds blancos

“…Por otro lado, los vidrios de fosfatos poseen temperatura de fusión baja, y un coeficiente de expansión térmica alto [18,19]; sin embargo, su poca estabilidad química es un fuerte inconveniente para muchas aplicaciones [19,20]. Se ha encontrado que los enlaces Al 2 O 3 mejora la estabilidad química de los vidrios de fosfato [20]. Además, también se ha reportado que la combinación de litio y aluminio en estos materiales mejora la alta transparencia y estabilidad térmica, lo que los hace muy atractivos para aplicaciones optoelectrónicas, fotónicas y pc-W-LEDs [21].…”