Studies of Preparation and Characteristics in Borosilicate Photosensitive Glass-Ceramics

Abstract

Photosensitive glass-ceramics have been extensively studied in recent years in that it is an attractive high diffraction efficiency grating materials. It is based on Stookey’s mixed fluoride sodium glass system for us to adopt, design prescriptions on the basis of SiO<sub>2</sub>-Na<sub>2</sub>O-Al<sub>2</sub>O<sub>3</sub>-ZnO for the glass main component and a series of glass doped with CeO<sub>2</sub>, AgNO<sub>3</sub> and NaF etc. melted at about 1450?C, and the glass have good optical property (homogeneity, without bubble and stripe, high transparency). The borosilicate glass was exposed by ultraviolet light, and then after the heat treatment of the sample, the measurement of ultraviolet-visible-near infrared absorption spectrum and the X ray diffraction of exposure part was performed

Zinc oxide nanoparticles decorated fluorescent and antibacterial glass fiber pre-filter paper

“…Figure 5(c) shows the FTIR spectra of both samples, the peak at ∼470 cm −1 is due to the O-Si-O bending vibration and peaks at ∼780 and ∼1010 cm −1 are due to the symmetric and asymmetric stretching vibration of the Si-O-Si linkage respectively. The peak at ∼670 cm −1 can be assigned to the Si-O-B linkage [25][26][27][28][29][30][31][32].. The peak at ∼428 cm −1 in the FTIR spectra of the ZnO-NPs decorated GF paper is due to the stretching mode of the Zn-O linkage [33][34][35].…”

“…XRD was performed to analyze the structural properties of the ZnO-NPs decorated and blank GF paper. Result of the blank GF paper is showing strong and broad diffraction in the range of 2θ=15°-30°( figure 5(b)), which can be assigned to the amorphous nature of the borosilicate glass fibers [25][26][27][28]. Obtained diffraction peaks of the ZnO-NPs decorated GF paper at 2θ=31.92°, 34.62°, 36.44°, 47.80°, 56.89°, 63.23°, 66.73°, 68.33°, 69.47°, 73.04°, 77.41°, 81.93°, 89.99°matches with the crystal lattice plane (1 0 0), (0 0 2), (1 0 1), (1 0 2), (1 1 0), (1 0 3), (2 0 0), (1 1 2), (2 0 1), (0 0 4), (2 0 2), (1 0 4), and (2 0 3) respectively of the ZnO ( figure 5(b)).…”

Production and Modification of Cellulose Nanocrystals fromAgave tequilanaWeber Waste and Its Effect on the Melt Rheology of PLA

“…Figure 6 shows XRD diffractograms for bagasse fiber Agave tequilana Weber (FATW), extracted cellulose, CNC, and CNC/2-EHA. FATW exhibited the characteristic peaks for cellulose type I (2θ = 15.2°, 22.6°), and the peak at 2θ = 24.7°corresponds to silica [48] from the rich silica soils required for this type of crop [49]. The extracted cellulose shows 3 peaks at 2θ~12.4°, 20.2°, and 22.2°corresponding to the structure of cellulose type II [28,50,51]; however, it is possible to observe some overlapped peaks corresponding have obtained CNC exhibiting a mixture of cellulose type I and II by using different contents of H 2 SO 4 during the isolation process [52].…”