Enhanced defect emission of TiO2-doped transparent glass-ceramics embedding ZnO quantum dots with optimized heat-treatment schedule

2021 ◽  
Author(s):  
Weicheng Lei ◽  
Zhiwei Luo ◽  
Haozhang Liang ◽  
Ziyou Zhou ◽  
Chengjian Wen ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Quantum Dots ◽  
Glass Ceramics ◽  
Treatment Schedule ◽  
Defect Emission ◽  
Transparent Glass ◽  
Heat Treatment Schedule ◽  
Zno Quantum Dots

Formation and Passive Q-Switch Performance of Glass-Ceramics Containing Co2+-Doped Spinel Nanocrystals

2008 ◽  
Vol 39-40 ◽  
pp. 219-224 ◽  
Author(s):  
Olga Dymshits ◽  
Alexander Shashkin ◽  
Alexander A. Zhilin ◽  
Yury Volk ◽  
Alexander Malyarevich ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Cross Sections ◽  
Near Infrared ◽  
Glass Ceramics ◽  
Excited State Absorption ◽  
Output Pulse ◽  
Treatment Schedule ◽  
Transparent Glass ◽  
Treatment Conditions ◽  
Heat Treatment Schedule

Compositions and heat treatment conditions were determined at which absorption and luminescence properties of aluminosilicate transparent glass-ceramics are defined mainly by tetrahedrally coordinated Co2+ ions located in spinel nanocrystals. Optical properties of cobaltdoped aluminosilicate transparent glass-ceramics have been studied in visible – near infrared (IR) spectral range. It was demonstrated that the concentration of tetrahedrally coordinated Co2+ ions in the spinel nanocrystals is determined by the CoO content in the initial glass and is independent of the heat-treatment schedule. Absorption saturation and bleaching relaxation under excitation of the 4A2→4T1(4F) transition of tetrahedrally coordinated Co2+ ions were studied. The value of groundstate and excited state absorption cross-sections of tetrahedrally coordinated Co2+ ions was estimated. Comparative study of output pulse parameters of Q-switched Er:glass laser using cobaltdoped glass-ceramics and Co2+:MgAl2O4 single crystal is presented.

Preparation and Characterization of Sm3+ Doped CBS Transparent Glass-Ceramics

2011 ◽  
Vol 418-420 ◽  
pp. 796-799
Author(s):  
Yi Min Wang ◽  
Hong Bo Zhang ◽  
Chun Hui Su ◽  
Dong Dong Fan
Keyword(s):  
Room Temperature ◽  
Glass Ceramics ◽  
Treatment Schedule ◽  
Laser Material ◽  
Transparent Glass ◽  
Melting Method ◽  
Strong Luminescence ◽  
Heat Treatment Schedule ◽  
Precursor Glass

Sm3+ doped transparent glass-ceramics of CaO-B2O3-SiO2 (CBS) system were prepared and characterized.The precursor glass was prepared by melting method and annealed at 450°C for 2h and cooled to room temperature at a speed of 5°C/min.The appropriate heat treatment schedule to precursor glass was determined to be 2h at 600°C for nucleation and 3h at 810°C for crystallizition.The transmittion of glass-ceramics at the range of visable light is 68% in average. Five main emission bands of Sm3+ are centered around 564nm,605nm,646nm,679nm and 789nm,which correspond to the 4G 5/2→6H 5/2,4G 5/2→6H 7/2,4G 5/2→6H 9/2,4G 5/2→6H 11/2 and 4G 5/2→6H 13/2 transitions.Very strong luminescence at around 599nm is observed in glass-ceramics,This indicates glass-ceramics to be a better host for Sm3+ than precursor glass and a hopeful laser material.

Crystallization Behavior of a New Transparent Glass-Ceramics

2010 ◽  
Vol 105-106 ◽  
pp. 597-599 ◽  
Author(s):  
Shu Ming Wang ◽  
Feng Hua Kuang ◽  
Qing Zhi Yan ◽  
Qing Chun Zhang ◽  
Chang Chun Ge
Keyword(s):  
Glass Matrix ◽  
Crystallization Behavior ◽  
Glass Ceramics ◽  
Treatment Schedule ◽  
Transparent Glass ◽  
High Transparency ◽  
Optimum Heat ◽  
Heat Treatment Schedule ◽  
Simultaneous Variation ◽  
Optimum Heat Treatment

In this article we present a new kind of large grain transparent glass-ceramics obtained by the method of crystal growth from a homogenous glass, the simultaneous variation of the glass matrix and crystalline compositions during the crystallization results in the high transparency of this kind of large grain, high crystalline volume glass-ceramics, which have suitable refractive indexes between respective phases. The nucleation and crystallization behaviors of this kind of glass-ceramics have been investigated. The optimum heat treatment schedule for the glass was determined by means of DSC, XRD and SEM. The desirable optical property, such as laser characteristics etc, of this new kind of glass-ceramics can be further developed by doping with transition metals or rare-earths.

Phase Evolutionary Process of CaO-Al2O3-SiO2 System Glass and Glass-Ceramic

2010 ◽  
Vol 168-170 ◽  
pp. 1947-1952
Author(s):  
Feng He ◽  
Cai Ming Ping ◽  
Jin Shu Cheng
Keyword(s):  
Heat Treatment ◽  
Glass Ceramic ◽  
Bending Strength ◽  
Glass Ceramics ◽  
Evolutionary Process ◽  
Treatment Schedule ◽  
Nucleation Agent ◽  
Transmission Electron ◽  
New Type ◽  
Heat Treatment Schedule

Sintering glass-ceramics, a new type material for architectural decoration, belong to CaO-Al2O3-SiO2system (CAS) without nucleation agent. Combined by Differential thermal analysis (DTA), X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Transmission electron microscope (TEM), phase evolutionary process of CaO-Al2O3-SiO2system glass and glass-ceramic was investigated. According the relation between heat treatment schedule and microstructure, the glass system has a very wide temperature range of crystallization. The crystalline phase is β-CaSiO3(β-wollastonite) and there is no other crystalline phases precipitated in these glass-ceramics. The influences of various heat treatment systems on the structure and properties of the glass-ceramics were investigated simultaneously. The optimal heat treatment schedule, microstructure and bending strength of the CAS glass ceramic were gained.

An MgB2 Superconducting Joint with its Own Heat-Treatment Schedule

2021 ◽  
pp. 1-1
Author(s):  
Hiromi Tanaka ◽  
Yi Li ◽  
Yoonhyuck Choi ◽  
Dongkeun Park ◽  
Wooseung Lee ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Treatment Schedule ◽  
Heat Treatment Schedule

Research on Processing Conditions of CBS Transparent Glass-Ceramics

2013 ◽  
Vol 873 ◽  
pp. 733-736
Author(s):  
Yi Min Wang ◽  
Hong Bo Zhang ◽  
Chun Hui Su ◽  
Qin Lei Wei
Keyword(s):  
Heat Treatment ◽  
Luminescence Property ◽  
Room Temperature ◽  
Glass Ceramics ◽  
Nucleating Agent ◽  
Processing Conditions ◽  
Transparent Glass ◽  
Melting Method ◽  
Heat Treatment Regime ◽  
Precursor Glass

On the basis of experimental verification, the optimum processing conditions of CaO-B2O3-SiO2(CBS) system transparent glass-ceramics were obtained. Composition of main raw powders (wt%) was:CaO 38%,SiO240%,B2O312%.The precursor glass was prepared by melting method and annealed at 560°C for 2h and cooled to room temperature at a speed of 5°C/min.The best nucleating agent is P2O5. The appropriate heat treatment regime to precursor glass was determined to be 2h at 600°C for nucleation and 3h at 780°C for crystallizition.Under this condition,the transmittion of glass-ceramics at the range of visable light is 72% in average and Sm3+keep good luminescence property doped in this host material.

Impact of heat treatment on the Mn2+ doped transparent glass ceramics containing NaZnPO4 nanocrystals

2017 ◽  
Vol 189 ◽  
pp. 172-175 ◽  
Author(s):  
Bo-Yang Wang ◽  
Rui Zhang ◽  
Wen-Feng Zhu ◽  
Guo-Hua Chen
Keyword(s):  
Heat Treatment ◽  
Glass Ceramics ◽  
Transparent Glass
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