Effect of molybdenum on structural features and thermal properties of iron phosphate glasses and boron-doped iron phosphate glasses

2020 ◽  
Vol 826 ◽  
pp. 154225 ◽  
Author(s):  
Yuanlin Wang ◽  
Fu Wang ◽  
Junjie Zhou ◽  
Hanzhen Zhu ◽  
Qilong Liao ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Iron Phosphate ◽  
Structural Features ◽  
Phosphate Glasses ◽  
Boron Doped ◽  
Iron Phosphate Glasses

scholarly journals Thermal properties of Na2O–P2O5–Fe2O3 polyphosphate glasses

2020 ◽  
Vol 142 (1) ◽  
pp. 203-209 ◽  
Author(s):  
Paweł Goj ◽  
Małgorzata Ciecińska ◽  
Magdalena Szumera ◽  
Paweł Stoch
Keyword(s):  
Thermal Properties ◽  
Phosphate Glass ◽  
Transformation Temperature ◽  
Glass Network ◽  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Continuous Change ◽  
Glass Transformation ◽  
Immobilization Techniques ◽  
Iron Phosphate Glasses

Abstract Iron phosphate glasses are materials that can have many applications like durable matrixes in waste immobilization techniques, biomaterials, optoelectronic devices, etc. Their possible usage is related to their glass network and thermal properties. The influence of Na2O content on thermal properties and crystallization ability of iron phosphate glass of base composition 30 Fe2O3–70 P2O5 mol% were studied. Increasing the content of Na2O causes a decrease in transformation temperature and increase in ΔCp. Characteristic temperatures, thermal stability and crystallizing phases were determined. Increasing content of sodium causes depolarization of iron phosphate glass network which causes a continuous change in ΔCp and glass transformation temperature. Discontinuous change in some glass properties suggests structure rebuilding about 30 mol% of Na2O.

Structural features of hafnium iron phosphate glasses

2009 ◽  
Vol 355 (31-33) ◽  
pp. 1571-1573 ◽  
Author(s):  
M. Karabulut ◽  
M. Yuksek ◽  
G.K. Marasinghe ◽  
D.E. Day
Keyword(s):  
Iron Phosphate ◽  
Structural Features ◽  
Phosphate Glasses ◽  
Iron Phosphate Glasses

scholarly journals Thermal properties and crystallization of iron phosphate glasses containing up to 25wt% additions of Si-, Al-, Na- and U-oxides

2008 ◽  
Vol 354 (14) ◽  
pp. 1541-1548 ◽  
Author(s):  
Diego O. Russo ◽  
Diego S. Rodríguez ◽  
Jesús Ma. Rincón L. ◽  
Maximina Romero ◽  
Carlos J.R. González Oliver
Keyword(s):  
Thermal Properties ◽  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Iron Phosphate Glasses

Structural features of lead iron phosphate glasses

2002 ◽  
Vol 304 (1-3) ◽  
pp. 188-194 ◽  
Author(s):  
S.T. Reis ◽  
D.L.A. Faria ◽  
J.R. Martinelli ◽  
W.M. Pontuschka ◽  
D.E. Day ◽  
...  
Keyword(s):  
Iron Phosphate ◽  
Structural Features ◽  
Phosphate Glasses ◽  
Iron Phosphate Glasses

Effects of Calcium Oxide Addition on the Structure and Thermal Properties of Iron Phosphate Glasses

2014 ◽  
Vol 48 (3) ◽  
pp. 184-189 ◽  
Author(s):  
Haijian Li ◽  
Cuiling Wang ◽  
Huijun Yu ◽  
Xiaofeng Liang ◽  
Shiyuan Yang
Keyword(s):  
Thermal Properties ◽  
Calcium Oxide ◽  
Iron Phosphate ◽  
Phosphate Glasses ◽  
Oxide Addition ◽  
Iron Phosphate Glasses

The Effects of Uranium on the Structure of Iron Phosphate Glasses

1999 ◽  
Vol 556 ◽  
Author(s):  
Yaspal Badyal ◽  
Mevlut Karabulut ◽  
Kanishka Marasinghe ◽  
Marie-Louise Saboungi ◽  
Dean Haeffner ◽  
...  
Keyword(s):  
Glass Structure ◽  
Iron Phosphate ◽  
High Energy ◽  
Structural Features ◽  
Real Space ◽  
Phosphate Glasses ◽  
Base Glass ◽  
Pair Correlations ◽  
X Ray ◽  
Iron Phosphate Glasses

AbstractBecause of their high chemical durability and waste loading capacity, iron phosphate glasses are a natural candidate for a nuclear waste disposal medium. We have studied the effects of uranium on the structure of iron phosphate glasses with both neutron and high-energy x-raydiffraction. The results of neutron scattering, which is mostly sensitive to pair correlations involving light atoms i.e. O-O, Fe-O and P-O, indicate the main structural features of the base glass are largely unaffected by the addition of UO2. The nearest-neighborbour P-O, Fe-O and O- O peaks remain at the same position in real space and their intensities scale approximately with concentration. These findings are consistent with earlier results using Raman scattering and EXAFS on the Fe-K edge, where in both cases the spectra remain similar to the base glass. The results of high-energy x-ray scattering, which is sensitive to correlations involving the heavier atoms and thus complements the neutron measurements, are also consistent with the overall picture of uranium occupying interstitial sites in the relatively undisturbed base glass structure. Combining the neutron and x-ray data for a 10 mol% UO2 glass suggests the intriguing possibility of a U6+ uranyl ion configuration although further work is needed to establish the precise local structure and valence state of uranium in these glasses.

Structural features of iron phosphate glasses

1997 ◽  
Vol 222 ◽  
pp. 144-152 ◽  
Author(s):  
G.K. Marasinghe ◽  
M. Karabulut ◽  
C.S. Ray ◽  
D.E. Day ◽  
M.G. Shumsky ◽  
...  
Keyword(s):  
Iron Phosphate ◽  
Structural Features ◽  
Phosphate Glasses ◽  
Iron Phosphate Glasses

Dielectric properties and structural features of barium-iron phosphate glasses

2004 ◽  
Vol 336 (3) ◽  
pp. 159-164 ◽  
Author(s):  
P Bergo ◽  
S.T Reis ◽  
W.M Pontuschka ◽  
J.M Prison ◽  
C.C Motta
Keyword(s):  
Dielectric Properties ◽  
Iron Phosphate ◽  
Structural Features ◽  
Phosphate Glasses ◽  
Iron Phosphate Glasses
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