Structural, Thermal, and Spectroscopic Properties of P2O5-KF-Al2O3 Glassy System

• Published in: Journal of electronic materials Vol. 52; no. 10; pp. 6719 - 6729
• Main Authors: Silva Neto, O. C., Muniz, R. F., Pedrochi, F., Steimacher, A.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-10-2023; Springer Nature B.V
• Subjects: Aluminum oxide; Amorphous materials; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composition; Electronics and Microelectronics; Fourier transforms; Glass transition temperature; Infrared spectra; Infrared spectroscopy; Instrumentation; Light emitting diodes; Materials Science; Molar volume; Optical and Electronic Materials; Original Research Article; Oxyfluorides; Phosphorus pentoxide; Solid State Physics; Spectrum analysis; oxyfluoride; aluminum oxide; glass; Phosphate
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-023-10607-3

The present study reports on the synthesis and investigation of a series of oxyfluoride phosphate glasses having a composition of (50-
x
)P
2
O
5
-50KF-
x
Al
2
O
3
(PKAl), with
x
 = 8 mol.%, 12 mol.%, 16 mol.%, and 20 mol.%, by the melt-quenching method. The introduction of Al
2
O
3
in the composition promotes a stabilizing effect, producing stable glasses in air and water ambient conditions. X-ray diffraction (XRD) showed the amorphous characteristics of the materials. The glasses presented high transparency in the UV-Vis-NIR regions (340–2000 nm). Differential scanning calorimetry (DSC) results showed that PKAl glasses have low glass transition temperature values (398–456°C). Fourier-transform infrared spectroscopy (FTIR) spectra showed structural changes caused by variations in P
2
O
5
-Al
2
O
3
ratios. The density values of PKAl glasses increased with Al
2
O
3
concentration from 2.45 g/cm
3
to 2.50 g/cm
3
. The molar volume decreases from 39.97 cm
3
/mol to 36.81 cm
3
/mol. The prepared new oxyfluoride phosphate glasses can be useful for photonic device applications such as lasers and light-emitting diodes (LEDs).