Phase Separation and Luminescence of Eu2O3 Doped Boron Silicate Glass

2012 ◽  
Vol 509 ◽  
pp. 303-307 ◽  
Author(s):  
Pei Jing Tian ◽  
Jin Shu Cheng ◽  
Gao Ke Zhang ◽  
Qin Yang
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Phase Separation ◽  
Silicate Glass ◽  
Heat Treatment Temperature ◽  
Fluorescence Spectra ◽  
Treatment Temperature ◽  
Separation Region ◽  
Luminescent Intensity ◽  
The Eu

Eu2O3 doped boron silicate glass appearing phase separation have been prepared and characterized. The heat treatment temperature was determined by DTA, the microstructure and optical properties of the glass were studied by SEM and fluorescence spectra. The adding of Eu2O3 restrained the phase separation and crystallization of the glass. Eu ions exist in the glass samples as the Eu3+ ions, rather than the Eu2+ ions. As the heat treatment temperature increases, the phase separation region increased gradually, and the luminescent intensity increases.

Heat treatment temperature effect on the microstructure and optical properties of Dy2(WO4)3 powders

2013 ◽  
Vol 28 (5) ◽  
pp. 862-867
Author(s):  
Wenyan Zhang ◽  
Chunhua Lu ◽  
Yaru Ni ◽  
Jianbin Song ◽  
Wenjuan Huang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Temperature Effect ◽  
Heat Treatment Temperature ◽  
Treatment Temperature

scholarly journals Effect of Heat-Treatment Temperature on Optical Properties of Ba2TiSi2O8 Nanocrystallized Glasses

2005 ◽  
Vol 113 (1318) ◽  
pp. 419-423 ◽  
Author(s):  
Yoshihiro TAKAHASHI ◽  
Kenji KITAMURA ◽  
Satoru INOUE ◽  
Yasuhiko BENINO ◽  
Takumi FUJIWARA ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Heat Treatment Temperature ◽  
Treatment Temperature

scholarly journals Physical and optical properties of sol-gel nano-silver doped silica film on glass substrate as a function of heat-treatment temperature

2003 ◽  
Vol 93 (12) ◽  
pp. 9553-9561 ◽  
Author(s):  
Wenyan Li ◽  
Sudipta Seal ◽  
Edward Megan ◽  
Jeff Ramsdell ◽  
Kirk Scammon ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Glass Substrate ◽  
Heat Treatment Temperature ◽  
Sol Gel ◽  
Silica Film ◽  
Treatment Temperature ◽  
Nano Silver

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.

Effects of Heat Treatment Temperature on the Photocatalytic Properties of TiO2 Prepared by Melt-Phase Separation Process

2007 ◽  
Vol 336-338 ◽  
pp. 1989-1991
Author(s):  
Wen Li Zhang ◽  
Yin Lin Wu ◽  
Ying Na Zhao ◽  
Xiao Li Zhang ◽  
Hao Man Li
Keyword(s):  
Heat Treatment ◽  
Phase Separation ◽  
Heat Treatment Temperature ◽  
Glass Phase ◽  
Heat Treatment Condition ◽  
Treatment Temperature ◽  
Separation Process ◽  
Glass System ◽  
Phase Separation Process ◽  
Melt Phase

The principle of melt-phase separation process for preparation of nanoparticle TiO2 is based on the adjustment of glass phase-separation structure. TiO2 grain size can be controlled by changing heat treatment temperature. The sample was composed of Na2O-B2O3-SiO2-TiO2 glass system (melted at 1573K). A photocatalytic nanoparticle TiO2 which was loaded on porous glass can be obtained by heat treatment of glass system at various temperatures and then acid washing. The results have shown that the glass phase-separation structure size matches crystallization rate and an optimal photodegradation property of TiO2 is achieved. It was found that the suitable heat treatment condition was at 848K for 12h, although its performance slightly changes with the composition variations.

Effects of Paraffin Addition on Optical Properties and Self-Assembly of SiO2 Photonic Crystal

2007 ◽  
Vol 124-126 ◽  
pp. 611-614
Author(s):  
Yong Taeg O ◽  
Dong Chan Shin
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Photonic Crystal ◽  
Self Assembly ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Evaporation Process ◽  
Bonding Force ◽  
Good Crystallinity ◽  
Silica Nanopowder

The effects of paraffin addition on the optical properties and crystallinity of selfassembled SiO2 photonic crystal (PC) were examined using a silica nanopowder. The silica nanopowder was fabricated using the well-known Stöber process. During the evaporation process for self-assembly of PC, the nanopowder content was 0.05 or 0.2 wt%, the paraffin addition was fixed to 0.001 wt%, the process temperature was 80oC and the heat-treatment temperature after evaporation was 900oC. The addition of paraffin reduced the defects in the PC layer, thereby resulting in good crystallinity and transmittance. Our results suggested that paraffin can enhance the bonding force between silica nanopowders.

Effects of Heat Treatment Temperature on Photocatalytic Activity of TiO2/SiO2 Composite Aerogels

2013 ◽  
Vol 27 (10) ◽  
pp. 1079-1083
Author(s):  
Zhao-Hui LIU ◽  
Gen-Liang HOU ◽  
Xun-Jia SU ◽  
Feng GUO ◽  
Zhou XIAO ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Composite Aerogels
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