Gadolinium Solubility Limits in Sodium-Aluminoborosilicate Glasses

1999 ◽  
Vol 556 ◽  
Author(s):  
L. Li ◽  
D. M. Strachan ◽  
L. L. Davis ◽  
H. Li ◽  
M. Qian
Keyword(s):  
Melting Temperature ◽  
Borosilicate Glass ◽  
Solubility Limit ◽  
Enthalpy Change ◽  
Glass System ◽  
Mole Percent ◽  
Molar Composition

AbstractGadolinium and lanthanum solubility limits in a sodium-alumino-borosilicate glass system were studied. As melting temperature increased from 1400°C to 1450°C, 1500°C and 1550°C, the solubility of gadolinium in the baseline glass 15B2O3-5A12O3-20Na2O-60SiO2 (in molar composition) increased from 10.1 to 11.3, 12.2 and 13.1 (in mole percent of Gd2O3). The enthalpy change of Gd2O3 dissolution in this baseline glass is about 43.6 kJ/mol. Boron effect on lanthanum solubility was studied using the following baseline glasses: xB2O3-20Na2O- 5Al2O3-60SiO2, where x equals to 5, 10, 15, and 20, respectively. It was found that lanthanum solubility limit increased from 8.4 to 10.3, 12.5 and 14.9 (in mole percent of La2O3) as B2O3 increased from 5.1 to 9.5, 13.1 and 16.2 mol%. Gd2O. and La2O3 have similar solubility limits. Solubility limits of mixtures containing different ratios of Gd2O3 to La2O3 in the baseline glass 15B2O3-20Na2O-5A12O3-60SiO2 were found insensitive to the ratio of La/Gd. As far as gadolinium is concerned, its solubility limit will decrease when other lanthanides are introduced.

Research on the Effects of Yttrium on Bismuth Titanate Borosilicate Glass System

Silicon ◽  
2021 ◽  
Author(s):  
K.H. Mahmoud ◽  
A.SA. Alsubaie ◽  
E. A. Abdel Wahab ◽  
Farid M. Abdel-Rahim ◽  
Kh. S. Shaaban
Keyword(s):  
Borosilicate Glass ◽  
Bismuth Titanate ◽  
Glass System

Theoretical analysis of constants of elasticity of lead calcium alumino-borosilicate glass system

2012 ◽  
Vol 38 (5) ◽  
pp. 437-443 ◽  
Author(s):  
Yasser B. Saddeek ◽  
Safaa A. Bashier ◽  
Saddek Amr Bakr
Keyword(s):  
Theoretical Analysis ◽  
Borosilicate Glass ◽  
Glass System

scholarly journals Synthesis, Crystallization, and Dielectric Behaviour of Lead Bismuth Titanate Borosilicate Glasses with Addition of 1% La2O3

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
C. R. Gautam ◽  
Abhishek Madheshiya ◽  
R. K. Dwivedi
Keyword(s):  
Glass Ceramic ◽  
Bismuth Titanate ◽  
Glass System ◽  
Glassy Matrix ◽  
Borosilicate Glasses ◽  
X Ray Diffraction ◽  
Mole Percent ◽  
Ceramic Samples ◽  
Donor Dopant ◽  
Quench Method

Lead bismuth titanate borosilicate glasses were prepared in the glass system 65[(PbxBi1-x)·TiO3]-34[2SiO2·B2O3]-1La2O3 (0.0≤x≤1.0) doped with one mole percent of La2O3 via conventional melt quench method. The amorphous nature of glass samples in this glass system is confirmed by using X-ray diffraction (XRD) study. Differential thermal analysis (DTA) has been employed to determine the glass transition temperature, Tg, as well as crystallization temperature, Tc. DTA measurements were recorded in temperature range from 30 to 1200°C. The prepared glasses were crystallized by regulated controlled heat treatment process on the basis of their DTA results. These samples are carried out for XRD measurements in the 2θ range from 20 to 80° to study the crystallization behaviour and phase formation of the glass ceramic samples. The scanning electron microscopy (SEM) of these glass ceramic samples has been carried out to explore the morphology through nucleation and growth of the crystallites in the glassy matrix. The values of dielectric constant as well as dielectric loss were increased with increasing the temperature within the frequency range from 20 Hz to 100 Hz. The addition of 1 mol% of La2O3 to the lead bismuth titanate glasses enhances the crystallization and acts as donor dopant for this glass system.

Synthesis and conductivity of the lithium-rich borosilicate glass system

2012 ◽  
Vol 61 (6) ◽  
pp. 988-991 ◽  
Author(s):  
Young-Hoon Rim ◽  
Mac Kim ◽  
Yong Suk Yang
Keyword(s):  
Borosilicate Glass ◽  
Glass System

Wettability and reactivity in diamond–borosilicate glass system

2010 ◽  
Vol 28 (2) ◽  
pp. 260-264 ◽  
Author(s):  
Xianghong Zhang ◽  
Yanhui Wang ◽  
Jing Lu ◽  
Jianbing Zang ◽  
Jinhui Zhang ◽  
...  
Keyword(s):  
Borosilicate Glass ◽  
Glass System

Investigation of the conductivity of the lithium borosilicate glass system

2007 ◽  
Vol 353 (18-21) ◽  
pp. 2004-2007 ◽  
Author(s):  
P. Kluvánek ◽  
R. Klement ◽  
M. Karáčoň
Keyword(s):  
Borosilicate Glass ◽  
Glass System

Mechanism of Sulfate Segregation during Glass Melting

2002 ◽  
Vol 757 ◽  
Author(s):  
Pavel Hrma ◽  
John D. Vienna ◽  
Joel S. Ricklefs
Keyword(s):  
Borosilicate Glass ◽  
Sodium Sulfate ◽  
Glass Batch ◽  
Glass Melting ◽  
Gas Bubbles ◽  
Solubility Limit ◽  
Sulfate Incorporation

ABSTRACTSulfate retention in glass during the vitrification process can be as low as 1/3 of the solubility limit, or can exceed the solubility limit if suspended in the glass in the form of droplets. This study is focused on the mechanism of incorporating and segregating sodium sulfate during the melting of an alkali-alumino-borosilicate glass batch. Batches were ramp heated at 4°C/min to temperatures ranging from 600°C to 1050°C and fractured for examination. Observation of the melts showed that as the batch temperature increases and the primary oxo-anionic, predominantly nitrate melt decomposes, the sulfate residue accumulates inside gas bubbles and is transported in them to the melt surface, where it remains segregated. The degree of sulfate incorporation into the final glass depends on the relative rates of sulfate dissolution in the borosilicate melt and sulfate lifting inside bubbles.

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