Phase Transformation, Optical and Emission Performance of Zinc Silicate Glass-Ceramics Phosphor Derived from the ZnO–B2O3–SLS Glass System

Abstract

A new transparent zinc silicate glass-ceramic was derived from the 55ZnO–5B2O3–40SLS glass system via a controlled heat-treatment method. The precursor glass sample was placed through the heat-treatment process at different temperatures to study the progress in phase transformation, optical performance and emission intensity of the zinc silicate glass-ceramics. For this project, material characterization was measured through several tests using densimeter and linear shrinkage measurement, X-ray diffraction (XRD), Fourier transform infrared reflection (FTIR), ultraviolet–visible (UV–Vis) and photoluminescence (PL) spectroscopy. The density and linear shrinkage measurements show that the density of the particular glass-ceramic samples increases with the progression of heating temperature. The XRD analysis displays the result in which the zinc silicate crystal starts to grow after the sample was treated at 700 °C. In addition, the FTIR spectra indicated that the crystallization of the zinc silicate phase occurred with the appearance of SiO4, ZnO4 and Si-O-Zn bands. UV–visible exhibited the small changes when the value for the optical band gap decreased from 3.867 to 3.423 eV, influenced by the temperature applied to the sample. Furthermore, the PL spectroscopy showed an enhancement of broad green emission at 534 nm upon the increased heat-treatment temperature. Thus, it can be concluded there is the progression of crystal growth as the heat-treatment temperature increased; three emission peaks appeared at 529, 570 and 682 nm for the green, yellow and red emissions, respectively.

Effects of Sintering Temperature Variation on Synthesis of Glass-Ceramic Phosphor Using Rice Husk Ash as Silica Source

“…Meanwhile, the other study provided a significant finding of blue emission pronounced in ZBS samples due to the ZnO crystalline phase [49]. It was rarely found in other zinc silicate-based host matrix as usually, green and yellow were commonly found in general [50,51]. Meanwhile, an intensified red band prominently occurred at 643 nm is due to the structural defect in ZnO that appeared in the form of oxygen vacancy and zinc interstitial [16,40], which was also found earlier in [52].…”

Synthesis and sintering impact on the properties of willemite based glass-ceramics using rice husk waste as silica source

“…37-1485). Also, it had been found that the improvement of the sintering period up to 10 hours, led to the progress of diffraction peak intensity of the crystal phase [8]. This finding can be corroborated by the values for full width at half maxima (FWHM) obtained from the X'pert highscore software was found to be decreased with the progression of the sintering duration from 0.5196, 0.2273, and 0.1624, respectively.…”

“…α-Zn 2 SiO 4 with polymorph of zinc orthosilicate as the most commonly found crystalline phase in Zn 2 SiO 4 glass-ceramics. Significant attention has been put on the fabrication of Zn 2 SiO 4 as it offers excellent glass transparency [8] and substantial fluorescence characteristics [9]. Optically, its wide bandgap has made it attentively produced as light-emitting diodes [7], laser diodes [10], display panel [11], and cathode-ray phosphor [12].…”

Sinter‐Crystallization and Optical Characterization of Dy3+: ZnO‐B2O3‐RHA Glass‐Ceramics

“…As the WGCs are very common with green emission of 522 nm, it is in line with the XRD pattern that Dy 3+ :WGC0 and Dy 3+ :WGC6 have not grown the willemite crystals. [26] Intensity (a.u. )…”