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

• DOI: 10.1016/j.jmrt.2020.08.005
• Publication Date: 2020-08-13T17:25:30Z
• Authors: Siti Aisyah Abdul...; Khamirul Amin Matori; Sidek Hj Ab Aziz; Mohd Hafiz Mohd Zaid; Mohd Mustafa Awan...; Aisyah Zakiah Khi...; Rahayu Emilia Moh...; Mohammad Zulhasif...; Nuraidayani Effendy
• Keywords: Luminescence; Mining engineering. Metallurgy; Optical absorption; TN1-997; Rice husk ash; Silicate glasses; 02 engineering and technology; 0210 nano-technology; Optical band gap energy

This research attempts to propose the fabrication and characterization of highly amorphous zinc silicate glasses derived from oxide (ZnO) white rice husk ash (WRHA). Three were produced based on empirical formula (ZnO)x(WRHA)1−x where x = 0.50, 0.55 0.60 wt.% by using melt-quenching methods. When ZnO increased, transparency three increased. Meanwhile, X-ray diffraction (XRD) analysis revealed that glassy state increased along with increment ZnO, at lowest (0.50 wt.%), presence silicon dioxide (SiO2) peak observed showing uncomplete melted silica. Additional vibrational band due tridymite was found in Fourier transform infrared spectroscopy (FTIR) content supporting XRD result while other showed formation SiO4 ZiO4 band. The absorption also as a non-bridging oxygen (NBO's). Hence, optical gap decreased 4.35 4.23 eV NBO's. All different emission peaks which is 535, 596 728 nm correspond green, yellow red respectively. luminescence properties attributed defect inside particle.