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.

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.

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.

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.

Study on the Preparation and Properties of Piezoelectric Glass-Ceramic Sr0.5Ba0.5Nb2O6

2013 ◽  
Vol 669 ◽  
pp. 204-207
Author(s):  
Shan Jiang ◽  
Jing Wen Lv ◽  
Tao Zheng
Keyword(s):  
Particle Size ◽  
Glass Ceramic ◽  
Crystalline Phase ◽  
Room Temperature ◽  
Glass Ceramics ◽  
Molar Ratio ◽  
Spectral Transmittance ◽  
Melting Method ◽  
Ceramic Samples ◽  
Analytical Reagents

Series of ferroelectric glass-ceramic samples of Sr0.5Ba0.5Nb2O6 were synthesized by melting method. Firstly, analytical reagents were melted for 30 minutes at 1440°C after being grinded evenly according to a certain molar ratio, then annealed for 10 hours from 550°C to room temperature, finally it was sustained for 4 hours at constant temperature about 700°C. The hardness and transmittance parameters of SBN glass-ceramic were tested. Results indicated the sample had the best property when the amount of Nb2O5 was 10mol%, whose hardness reached 506 kg/mm2, and spectral transmittance was higher than 35% . XRD spectra of this sample indicated this SBN glass-ceramics contained a large number of Sr0.5Ba0.5Nb2O6 crystalline phase and a small amount of Sr0.3Ba0.7Nb2O6 phase. The particle size was about 50 nm.

Preparation and Characterization of Sro-Na2O-Fe2O3-P2O5-SiO2 Ferrimagnetic Glass-Ceramics for Hyperthermia Application

2012 ◽  
Vol 581-582 ◽  
pp. 457-462
Author(s):  
Jian An Liu ◽  
Xue Na Yang ◽  
Mei Mei Zhang ◽  
Wen He
Keyword(s):  
Aqueous Solution ◽  
Magnetic Properties ◽  
Magnetic Property ◽  
Glass Ceramic ◽  
Room Temperature ◽  
Glass Ceramics ◽  
Vibrating Sample Magnetometer ◽  
Heat Treated ◽  
Molecular Scale

The ferrimagnetic glass-ceramic based on SrO-Na2O-Fe2O3-P2O5-SiO2 system was prepared for hyperthermia application using aqueous aolution-melt method. Using the aqueous solution solvent evaporation, we obtained the molecular-scale homogenously glass precursor. The precursor was completely melted in a lidded platinum crucible placed in an electric furnace at 1480°C for 1h and then annealed in a furnace at 550°C for 40min.The annealed glasses were heat treated at 1050°C for 2h to obtain the glass-ceramics. The crystallization of the glass systems with different component has been systematically investigated by using XRD. Room temperature magnetic property of the samples were investigated using a Vibrating Sample Magnetometer(VSM). The evolution of magnetic properties in these glasses as a function of P2O5 quality concentration was discussed.

Synthesis and Characterization of Eu3+ -Doped Transparent Glass-ceramics Containing Nanocrystalline SrII NbIV O3

2013 ◽  
Vol 96 (7) ◽  
pp. 2155-2162 ◽  
Author(s):  
Upender Gangadharini ◽  
Atiar Rahaman Molla ◽  
Anal Tarafder ◽  
Basudeb Karmakar
Keyword(s):  
Glass Ceramics ◽  
Synthesis And Characterization ◽  
Transparent Glass
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