Preparation and Characterization of Na₂O-Y₂O₃-P₂O₅-SiO₂ Transparent Glass Ceramics

Abstract

Transparent glass ceramics containing Na3.6Y1.8(PO4)3 crystals were successfully synthesized using high temperature melting quenching and subsequent heat treatment of the precursor glass with a composition 15Na2CO3-3Y2O3-45SiO2-31H3BO3- 5.4P2O5-0.6Sb2O3 (mol%). The impact of heat treatment is investigated in detail. The glass sample was tested by differential scanning calorimetry analysis to determine the heat treatment system. The ideal heat-treated condition is at 650°C for 2 h. The structure and morphology properties were systematically analyzed by recording X-ray diffraction patterns and scanning electron microscopy images, which indicate that Na3.6Y1.8(PO4)3 crystal were precipitated homogeneously among the glass matrix. The microstructural of precursor glass and glass ceramic were compared by analyzing FTIR spectra, indicating the formation of phosphate groups in glass ceramic. The refractive index of glass ceramics samples were measured. In the visible region, the transmittance of glass ceramics is up to 85%. Moreover, the relationship between the refractive index of the sample and the transmittance is discussed.

Photo-luminescence characteristics of binary P2O5–CaO glass ceramic

“…In view of the good optical properties of the materials doped with Tm 3+ , Tb 3+ , Eu 3+ , Sm 3+ , and Mn 2+ ions [16][17][18][19][20], the five ions were chosen as the luminous centre. In previous reports, the polybasic glass ceramics with CaO and P 2 O 5 had been widely studied [21][22][23][24][25][26]. However, the reports on the binary phosphate glass ceramics with CaO-P 2 O 5 were few.…”