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

Abstract

In this study, the authors attempted to propose the very first study on fabrication and characterization of zinc-boro-silicate (ZBS) glass-ceramics derived from the ternary zinc-boro-silicate (ZnO)0.65(B2O3)0.15(RHA)0.2 glass system through a conventional melt-quenching method by incorporating rice husk ash (RHA) as the silica (SiO2) source, followed by a sintering process. Optimization of sintering condition has densified the sintered samples while embedded beta willemite (β-Zn2SiO4) and alpha willemite (α-Zn2SiO4) were proven in X-ray diffraction (XRD) analysis. Field emission scanning electron microscopy (FESEM) has shown the distribution of willemite crystals in rhombohedral shape crystals and successfully form closely-packed grains due to intense crystallization. The photoluminescence (PL) spectra of all sintered ZBS glasses presented various emission peaks at 425, 463, 487, 531, and 643 nm corresponded to violet, blue, green, and red emission, respectively. The correlation between the densification, phase transformation, microstructure, and photoluminescence of Zn2SiO4 glass-ceramic phosphor is discussed in detail.

Synthesis and Characterization of ZnO-SiO2 Composite Using Oil Palm Empty Fruit Bunch as a Potential Silica Source

“…It has excellent luminescence properties in blue, green and red spectral regions [14]. On the other hand, when heat treatment is applied, zinc silicate can be formed [15][16][17]. Zinc silicate has emerged as a good host material in plasma display panels, cathode ray tubes, laser crystal and electroluminescent devices [18][19][20][21].…”

Improving the Anticorrosion and Self-Healing Properties of the Epoxy Coating Using the Mn–Zn2SiO4/PDA Composite

“…37–1485, JCPDS), indicating that the crystal structure of the samples is consistent with that of Zn 2 SiO 4 . The sharp diffraction peaks observed at 2θ = 12.60, 21.88, 25.32, 31.34, 33.85, 38.70, 48.64, and 65.40° correspond to the (011), (300), (220), (113), (140), (223), (333), and (713) crystal planes of Zn 2 SiO 4 , respectively. , The doping of the Mn ions does not alter the initial crystal structure of the Zn 2 SiO 4 material. The incorporation of Mn ions led to an increase in the intensity of the diffraction peaks of the Mn–Zn 2 SiO 4 material shown in Figure b, indicating an improvement in crystallinity and an increase in grain size.…”

“…38 This peak is attributed to the vibrational deformation of the Zn−O bond in the arrangement of the silicate zinc structure caused by the doping 223), (333), and (713) crystal planes of Zn 2 SiO 4 , respectively. 42,43 The doping of the Mn ions does not alter the initial crystal structure of the Zn 2 SiO 4 material. The incorporation of Mn ions led to an increase in the intensity of the diffraction peaks of the Mn−Zn 2 SiO 4 material shown in Figure 2b, indicating an improvement in crystallinity and an increase in grain size.…”

Assessment and comparison of thermochemical pathways for the rice residues valorization: pyrolysis and gasification

“…However, the presence of silica provides pozzolanic characteristics, which has allowed it to be studied as a cement additive for civil engineering applications, increasing the strength and durability of the material (Moayedi et al 2019). In addition to being used as raw materials for the synthesis of ceramic materials (Wahab et al 2020). On the other hand, other research has shown the applicability of rice husk ash as a sorbent in the extraction of antibiotics in solid phase (Grefa et al 2023).…”