Thermal stability of glasses from the Fe4(P2O7)3–Fe(PO3)3 system

Zhang, Liying; Ghussn, Luciana; Schmitt, Melodie L.; Zanotto, Edgar Dutra; Brow, Richard K.; Schlesinger, Mark E.

doi:10.1016/j.jnoncrysol.2010.03.044

Cited by 25 publications

(27 citation statements)

References 27 publications

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“…For binary Fe‐phosphate glasses with O/P ratios between 3.0 and about 3.6, increasing the O/P ratio decreases T g , a trend consistent with the relative melting points of Fe(PO 3 ) 3 and Fe 4 (P 2 O 7 ) 3 (Figure ). Crystallization tendency was maximized for compositions with O/P ratios around 3.3‐3.4, with the metaphosphate (O/P = 3) and pyrophosphate (O/P = 3.5) compositions less likely to crystallize.…”

Section: Properties Of Iron Phosphate Glassessupporting

confidence: 74%

Iron polyphosphate glasses for waste immobilization

Brow

Kim

Reis³

2019

Int J of Appl Glass Sci

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Iron polyphosphate glasses resist attack by water, can dissolve large concentrations of species that are otherwise insoluble in borosilicate glass melts, and can be processed at relatively low temperatures (1000‐1200°C), and so are viable hosts for vitrifying hazardous and radioactive wastes. The properties of iron polyphosphate glasses depend on the distributions of phosphate anions and the nature of the bonds between those anions and various metal polyhedra, and quantitative information can be obtained about those structures using a variety of spectroscopic, diffraction, and chromatographic techniques. This structural information helps explain compositional trends in properties, including dissolution rates, electrical conductivity, thermal properties and crystallization tendency. Studies of waste forms made with low activity and high level wastes are reviewed and related back to an understanding of the structures and properties of simpler iron polyphosphate glasses.

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Section: Properties Of Iron Phosphate Glassessupporting

confidence: 74%

Iron polyphosphate glasses for waste immobilization

Brow

Kim

Reis³

2019

Int J of Appl Glass Sci

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“…Recently, iron phosphate compounds have attracted considerable research interest in the field of material science due to their outstanding chemical, thermal, electrical and magnetic properties [1][2][3][4][5]. Crystalline and amorphous iron phosphate materials have been developed and applied widely in various technologically important fields such as catalysis [6][7], electrochemistry [8][9][10][11], optical and magnetic materials [12][13][14][15][16], biosensor fabrication [17], bio-absorbable glass fibers [18], industrial coatings [19], and tissue engineering [20].…”

Section: Introductionmentioning

confidence: 99%

“…In our previous work, we have synthesized a series of iron phosphate compounds using FePO 4 ÁxH 2 O, Fe, Fe 2 O 3 , Fe 3 O 4 and NH 4 H 2-PO 4 , and characterized these products using X-ray diffraction, SEM, DTA/TGA and Raman spectroscopy [2,5]. We have also studied the thermal stability of glasses from the (Fe 4 (P 2 O 7 ) 3 + Fe(PO 3 ) 3 ) system [4], the properties of glass formation from iron-rich phosphate melts [3], and the behaviors of phase equilibria in iron phosphate systems [1,5].…”

Section: Introductionmentioning

confidence: 99%

“…We have also studied the thermal stability of glasses from the (Fe 4 (P 2 O 7 ) 3 + Fe(PO 3 ) 3 ) system [4], the properties of glass formation from iron-rich phosphate melts [3], and the behaviors of phase equilibria in iron phosphate systems [1,5]. To understand further these compounds and their chemical synthesis, the study of the thermodynamic properties, especially the heat capacity and entropy, is still relevant and necessary.…”

Section: Introductionmentioning

confidence: 99%

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Low temperature heat capacity Study of Fe(PO3)3 and Fe2P2O7

Shi

Zhang

Schlesinger

et al. 2013

The Journal of Chemical Thermodynamics

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“…This coincides with what was observed during the experimental stage, since the molten liquid tended to crystallize rapidly when it was poured. On the other hand, the reduced glass transition temperature (T gr), which is the ratio between Tg and Tm, is an indication of volumetric nucleation, as long as it is less than or equal to 0.6 [9,14,15], in this case Tgr = 0.589. This parameter is important to be able to have microstructural control.…”

Section: Precursor Glassmentioning

confidence: 99%

Obtention and characterization of lithium superionic conductors using the glass-ceramic method

Narváez-Semanate¹,

Rodrigues²,

Meneses³

et al. 2018

DYNA

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This paper proposes the glass-ceramics method for obtaining lithium ion (Li + ) solid electrolytes. This technique provides high chemical and microstructural homogeneity as well as low porosity. Glass samples were subjected to either single or double heat treatments, between 700 °C and 1000 °C, in order to obtain the glass-ceramics. Differential Scanning Calorimetry -DSC -results evidenced the possibility of fabricating these ceramics from glass in the system Li2O·Al2O3·TiO2·P2O5. Samples observed by Scanning Electron Microscopy -SEMshowed a finely grained microstructure which was homogeneously distributed and non-porous. X-ray Diffraction -XRD -patterns showed the formation of the high conducting phase LiTi2(PO4)3. A high ionic conductivity, in the order of 10 -3 S/cm at 1000 °C, was measured by Impedance Spectroscopy -IS. It suggests that the synthesis method used in this research is useful for fabricating lithium ion glass-ceramics and opens up a new alternative for manufacturing different electrical ceramics.

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Thermal stability of glasses from the Fe4(P2O7)3–Fe(PO3)3 system

Cited by 25 publications

References 27 publications

Iron polyphosphate glasses for waste immobilization

Iron polyphosphate glasses for waste immobilization

Low temperature heat capacity Study of Fe(PO3)3 and Fe2P2O7

Obtention and characterization of lithium superionic conductors using the glass-ceramic method

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