Optical properties and weakening of elastic moduli with increasing glass transition temperature (Tg) in (80–x)TeO2-xBaO-20ZnO glasses

2015 ◽  
Vol 106 (8) ◽  
pp. 893-901 ◽  
Author(s):  
Muliana Ismail ◽  
Siti Nurbaya Supardan ◽  
Ahmad Kamal Yahya ◽  
Roslan Abd-Shukor
Keyword(s):  
Optical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Elastic Moduli

Thermal and Optical Properties of High Refractive Index xNb2O5-(1-x)La2O3 Glasses Prepared by Aerodynamic Levitation Method

2013 ◽  
Vol 749 ◽  
pp. 255-259 ◽  
Author(s):  
Yu Xing Cheng ◽  
Gui Sheng Xu ◽  
Jian Ding Yu ◽  
Xiu Hong Pan ◽  
Ming Hui Zhang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
High Refractive Index ◽  
Infrared Region ◽  
Crystallization Peak ◽  
Promising Application ◽  
Aerodynamic Levitation

Bulk glasses of xNb2O5(1-x)La2O3(NL) with high refractive index were prepared by aerodynamic levitation method. Only when x ranges from 0.62 to 0.72, NL glasses can be obtained. The effect of compositions on the thermal property and refractive index was investigated. The results indicated that the glass transition temperature ranged from 733 to 767 with the increasing of La2O3in NL glasses, while the crystallization peak ranged from 811 to 837 . The glasses had high refractive index ranging from 2.26 to 2.31. According to the Drude-Voigt relationship, the Abbe number of the glasses was calculated to be about 20. This type of glass was colorless and transparent in the region from visible to infrared region. Thus, the niobate glass system has promising application in lenses, next-generation optical disk, and endoscopes.

Fe-based bulk metallic glasses with diameter thickness larger than one centimeter

2004 ◽  
Vol 19 (5) ◽  
pp. 1320-1323 ◽  
Author(s):  
V. Ponnambalam ◽  
S. Joseph Poon ◽  
Gary J. Shiflet
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glasses ◽  
Crystalline Phase ◽  
Elastic Moduli ◽  
Bulk Metallic Glasses ◽  
Maximum Diameter ◽  
Fluxing Agent

Fe–Cr–Mo–(Y,Ln)–C–B bulk metallic glasses (Ln are lanthanides) with maximum diameter thicknesses reaching 12 mm have been obtained by casting. The high glass formability is attained despite a low reduced glass transition temperature of 0.58. The inclusion of Y/Ln is motivated by the idea that elements with large atomic sizes can destabilize the competing crystalline phase, enabling the amorphous phase to be formed. It is found that the role of Y/Ln as a fluxing agent is relatively small in terms of glass formability enhancement. The obtained bulk metallic glasses are non-ferromagnetic and exhibit high elastic moduli of approximately 180–200 GPa and microhardness of approximately 13 GPa.

Experimental Investigation of PolyJet 3D Printing Process: Effects of Orientation and Layer Thickness on Thermal Glass Transition Temperature

2019 ◽  
Author(s):  
Jackson Sanders ◽  
Xingjian Wei ◽  
Zhijian Pei
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Layer Thickness ◽  
Elastic Moduli ◽  
3D Printer ◽  
Limited Information ◽  
Control Factors ◽  
Full Color ◽  
Process Effects

Abstract The J750 PolyJet printer is the newest model of full-color and multi-material 3D printer from Stratasys. Currently, limited information is available about the effects of control factors on thermal glass transition temperature of parts printed by this printer. In this study, the effects of two control factors, printing orientation and layer thickness, on the thermal glass transition temperature (Tg) are investigated. The results suggest that both control factors significantly affect Tg. Specifically, samples printed using the high mix mode have higher elastic moduli than those printed using high quality mode. Larger values of elastic moduli directly lead to a higher thermal glass transition temperature, making the material more effective under relatively extreme temperatures and duress. These results would be valuable to researchers and practitioners who use the Polyjet 3D printer.

Nonlinear optical properties of high glass-transition temperature polyphosphazene films

2000 ◽  
Vol 115 (1-3) ◽  
pp. 241-244 ◽  
Author(s):  
G Rojo ◽  
F Agulló-López ◽  
G.A Carriedo ◽  
F.J Garcı́a Alonso ◽  
J.I Fidalgo Martinez
Keyword(s):  
Optical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
High Glass Transition Temperature

Bulk Scandium-based Metallic Glasses

2005 ◽  
Vol 20 (9) ◽  
pp. 2243-2247 ◽  
Author(s):  
X.K. Xi ◽  
S. Li ◽  
R.J. Wang ◽  
D.Q. Zhao ◽  
M.X. Pan ◽  
...  
Keyword(s):  
Glass Transition ◽  
Rare Earth ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glasses ◽  
Elastic Moduli ◽  
Supercooled Liquid ◽  
The Novel ◽  
Casting Method ◽  
Mold Casting

The novel rare-earth scandium-based bulk metallic glasses (BMGs) are obtained by the copper mold casting method. Compared with other rare-earth BMGs reported so far, the Sc-based BMGs exhibit the highest elastic moduli (e.g., Young’s modulus, E = 85 GPa; bulk modulus, B = 77.5 GPa), glass transition temperature (Tg = 662 K), and crystallization temperature (Tx = 760 K) combined with a large region of supercooled liquid (ΔT = 98 K). A good correlation between glass transition temperature and elastic moduli is found in a variety of rare-earth-based BMGs.

Sign in / Sign up

Export Citation Format

Share Document