scholarly journals A Study on Optical Properties of Zinc Silicate Glass-Ceramics as a Host for Green Phosphor

2020 ◽  
Vol 10 (14) ◽  
pp. 4938
Author(s):  
Siti Aisyah Abdul Wahab ◽  
Khamirul Amin Matori ◽  
Mohd Hafiz Mohd Zaid ◽  
Mohd Mustafa Awang Kechik ◽  
Sidek Hj Ab Aziz ◽  
...  
Keyword(s):  
Optical Properties ◽  
Silicate Glass ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Glass Ceramics ◽  
Linear Shrinkage ◽  
Zinc Silicate ◽  
Crystal Formation ◽  
Absorption Bands ◽  
White Rice

For the very first time, a study on the crystallization growth of zinc silicate glass and glass-ceramics was done, in which white rice husk ash (WRHA) was used as the silicon source. In this study, zinc silicate glass was fabricated by using melt–quenching methods based on the composition (ZnO)0.55(WRHA)0.45, where zinc oxide (ZnO) and white rice husk ash were used as the raw materials. The control crystallization technique was used in which the sample was sintered at 700–950 °C; then, the physical, structural, and optical properties of the glass and glass-ceramics were investigated by using a densitometer, linear shrinkage, X-ray diffraction (XRD), Fourier transform infrared radiation (FTIR), field-emission scanning electron microscopy (FESEM), and photoluminescence spectroscopy (PL). The density and linear shrinkage increased as the crystallinity increased and the XRD results showed the progression of the crystal formation, in which the sample was still in an amorphous state at 27 °C and 700 °C; the crystalline phase started at 750 °C. Based on the FTIR spectra, all samples showed sharpened absorption bands as the sintering temperature was increased, and the FESEM image showed the progression of crystal growth, indicating the formation of zinc silicate glass-ceramics. Lastly, the PL spectra emitted three emission peaks, at 529, 570, and 682 nm for the green, yellow, and red emission, respectively.

scholarly journals Effect of MnO2 doped on physical, structure and optical properties of zinc silicate glasses from waste rice husk ash

2017 ◽  
Vol 7 ◽  
pp. 955-961 ◽  
Author(s):  
Ali Jabbar Abed Al-Nidawi ◽  
Khamirul Amin Matori ◽  
Azmi Zakaria ◽  
Mohd Hafiz Mohd Zaid
Keyword(s):  
Optical Properties ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Physical Structure ◽  
Silicate Glasses ◽  
Zinc Silicate

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

2020 ◽  
Vol 10 (14) ◽  
pp. 4940
Author(s):  
Muhammad Faris Syazwan Mohd Shofri ◽  
Mohd Hafiz Mohd Zaid ◽  
Khamirul Amin Matori ◽  
Yap Wing Fen ◽  
Yazid Yaakob ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Silicate Glass ◽  
Glass Ceramic ◽  
Heat Treatment Temperature ◽  
Glass Ceramics ◽  
Linear Shrinkage ◽  
Treatment Temperature ◽  
Glass System ◽  
Zinc Silicate

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.

scholarly journals Effect of ZnO on the phase transformation and optical properties of silicate glass frits using rice husk ash as a SiO2 source

2020 ◽  
Vol 9 (5) ◽  
pp. 11013-11021
Author(s):  
Siti Aisyah Abdul Wahab ◽  
Khamirul Amin Matori ◽  
Sidek Hj Ab Aziz ◽  
Mohd Hafiz Mohd Zaid ◽  
Mohd Mustafa Awang Kechik ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Optical Properties ◽  
Silicate Glass ◽  
Rice Husk ◽  
Rice Husk Ash

scholarly journals Influence of zinc oxide on the physical, structural and optical band gap of zinc silicate glass system from waste rice husk ash

Optik ◽  
2017 ◽  
Vol 136 ◽  
pp. 129-135 ◽  
Author(s):  
Chee Sun Lee ◽  
Khamirul Amin Matori ◽  
Sidek Hj. Ab Aziz ◽  
Halimah Mohamed Kamari ◽  
Ismayadi Ismail ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Band Gap ◽  
Silicate Glass ◽  
Rice Husk ◽  
Optical Band Gap ◽  
Rice Husk Ash ◽  
Glass System ◽  
Zinc Silicate

scholarly journals Synthesis of Silica-Salen Derivative from Rice Husk Ash and its Use for Extraction of Divalent Metal Ions Co(II), Ni(II) and Cu(II)

2019 ◽  
Vol 20 (1) ◽  
pp. 16 ◽  
Author(s):  
Duha Hussien Attol ◽  
Hayder Hamied Mihsen
Keyword(s):  
Metal Ions ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Divalent Metal Ions ◽  
Prepared Compound ◽  
Absorption Bands ◽  
Pseudo Second Order ◽  
Ft Ir

Rice husk ash (RHA) was used to prepare sodium silicate, which in turn was functionalized with 3-(chloropropyl)triethoxysilane employing the sol-gel technique to form RHACCl. Chloro group in RHACCl was replaced with iodo group forming RHACI. Ethylenediamine was immobilized on RHACI in order to prepare it for the reaction with salicylaldehyde to form a silica derivative-salen. FT-IR analysis indicated the presence of secondary amine and –NH and C=N absorption bands. XRD analysis revealed the occurrence of the broad diffused peak with maximum intensity at 22–23° (2θ). BET measurements showed also that the surface area of the prepared compound is 274.55 m2/g. Elemental analysis proved the existence of nitrogen in the structure of the prepared compound. The silica derivative-salen showed high potential for extraction and removal of heavy contaminating metal ions Ni(II), Cu(II), and Co(II) from aqueous solutions. The kinetic study demonstrates that the adsorption of the metal ions follows the pseudo-second order.

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

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5413
Author(s):  
Rabiatul Adawiyah Abdul Wahab ◽  
Mohd Hafiz Mohd Zaid ◽  
Sidek Hj. Ab Aziz ◽  
Khamirul Amin Matori ◽  
Yap Wing Fen ◽  
...  
Keyword(s):  
Rice Husk ◽  
Glass Ceramic ◽  
Rice Husk Ash ◽  
Glass Ceramics ◽  
Xrd Analysis ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
Silica Source ◽  
Quenching Method

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.

Utilization of Rice Husk Ash and Waste Sludge from Cutting Glass Manufacturing with Angthong Pottery

2014 ◽  
Vol 608 ◽  
pp. 103-107
Author(s):  
Yutthana Kaewtabut ◽  
Wansika Sirimongkol ◽  
Adisak Thueploy ◽  
Siriphan Nilpairach
Keyword(s):  
Rice Husk ◽  
Water Adsorption ◽  
Bending Strength ◽  
Rice Husk Ash ◽  
Slip Casting ◽  
Linear Shrinkage ◽  
Strength Increase ◽  
Casting Technique ◽  
Waste Sludge ◽  
Industrial Ecosystems

Efficiently utilization of rice husk ash (RHA) and waste sludge from cutting glass manufacturer (WSG) as additives to pottery clay would yield positive economic impacts, such as more friendly industrial ecosystems. In this study, The RHA and WSH were used as additives to Angthong pottery clay (APC) and casting and fired properties were examined. Two sets of sample with a mixture consisting of 60% APC, 20% RHA, and 20% WSG (CRG formula) and non-added clay (C100 formula) were prepared by slip casting technique. Samples were fired at temperature 900 °C and 1100°C; then the viscosity of slurry, linear shrinkage, water adsorption, and 3-point bending strength were measured. The results showed that the optimum viscosity for slip casting of CRG and C100 were 1638 cP and 983 cP, respectively. The water adsorptions of all samples decrease while their shrinkage and strength increase with temperature. At 900°C, the water adsorption and the strength of CRG were 32% and 1184 psi, respectively. Comparatively, CRG’s water absorption was 1.5 times higher than C100’s, while their mechanical strength was insignificantly different. This due to the RHA behaves as pore forming and the WSG promotes the sintering of samples.

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