Influence of CuO and ZnO addition on the multicomponent phosphate glasses: Spectroscopic studies

Szumera, Magdalena; Wacławska, I.; Sułowska, Justyna

doi:10.1016/j.molstruc.2016.02.026

Cited by 38 publications

(11 citation statements)

References 37 publications

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“…Bands at about 999 cm -1 are connected to asymmetric [23] or symmetric [16] stretching vibrations in metaphosphate units [23], particularly P-O bonds in the (PO 3 ) 2end chain groups are implied to be involved [22,30]. Corbridge and Lowe [29] indicated the presence of band located in similar position (approx.…”

Section: -950 CM 21mentioning

confidence: 97%

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Correlation between glass transition effect and structural changes in multicomponent iron phosphate-silicate glasses

Kuczek

Jeleń

Sułowska

et al. 2019

J Therm Anal Calorim

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Iron phosphate-silicate glasses from P 2 O 5-SiO 2-K 2 O-MgO-CaO-Fe 2 O 3 system were subjected to the thermal and spectroscopic studies in order to gain information about their structure and thermal behavior in the range of glass transition effect. Research includes results obtained via DSC, MIR and DRIFT spectroscopy. Designated values of glass transition temperature and specific heat change slightly increases with Fe 2 O 3 incorporation. Spectra collected during thermal treatment of glasses containing 2 and 30 mol% Fe 2 O 3 exhibited various changes. Fe 2 O 3 addition affected the glass structure by its reinforcement and led to its preservation during thermal treatment. The connection between density, molar volume, oxygen packing density and the chemical composition's alteration were also established because of the direct dependence of physical properties and the structure. Obtained results supported thermal and spectroscopic studies. Conducted research is considered as a contribution to the knowledge about the family of iron phosphate glasses, which are known from their interesting properties and widely used applications.

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Section: -950 CM 21mentioning

confidence: 97%

“…According to [23], band at about 1100 cm -1 corresponds to the combination of P-O and Si-O stretching vibration in P-O-P and P-O-Si linkages in metaphosphate units. Following Hudgens and Martin [24], it may be also assigned to the symmetric stretching of PO 2 groups.…”

Section: -950 CM 21mentioning

confidence: 99%

Correlation between glass transition effect and structural changes in multicomponent iron phosphate-silicate glasses

Kuczek

Jeleń

Sułowska

et al. 2019

J Therm Anal Calorim

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“…In the case of the KFP10Eu glass matrix, a strong signal located at −24.01 ppm is also related to Q 2 tetrahedra structural units. In the case of KFP20Eu glass, a dominant signal present at chemical shift of −21.80 ppm is attributed to Q 2 tetrahedra units . The KFP glass structure is basically formed by the Q 2 structure expected from the metaphosphate groups.…”

Section: Resultsmentioning

confidence: 95%

“…In the case of KFP20Eu glass, a dominant signal present at chemical shift of −21.80 ppm is attributed to Q 2 tetrahedra units. [14][15][16] The KFP glass structure is basically formed by the Q 2 structure expected from the metaphosphate groups. From the 31 P MAS NMR spectra, it was observed that as the Eu 2 O 3 concentration increased, these was no significant variation in the phosphate…”

Section: Magic Angle Spin Resonance Spectroscopy (Mas Nmr) -31 P Numentioning

confidence: 99%

Spectral investigations on Eu³⁺,Sm³⁺‐doped and Sm³⁺/Eu³⁺ co‐doped potassium‐fluoro‐phosphate glass emitting intense orange‐red for lighting applications

et al. 2017

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Potassium fluoro-phosphate (KFP) glass singly doped with different concentrations of europium (Eu ) or samarium (Sm ) or co-doped (Sm /Eu ) was prepared, and their luminescence spectra were investigated. The phase composition of the product was verified by X-ray diffraction analysis. Optical transition properties of Eu in the studied potassium phosphate glass were evaluated in the framework of the Judd-Ofelt theory. The radiative transition rates (A ), fluorescence branching ratios (β), stimulated emission cross-sections (σ ) and lifetimes (τ ) for certain transitions or levels were evaluated. Red emission of Eu was exhibited mainly by the D → F transition located at 612 nm. Concentration quenching and energy transfer were observed from fluorescence spectra and decay curves, respectively. It was found that the lifetimes of the D level increased with increase in concentration and then decreased. By co-doping with Sm , energy transfer from Sm to Eu occurred and contributed to the enhancement in emission intensity. Intense orange-red light emission was obtained upon sensitizing with Sm in KFP glass. This approach shows significant promise for use in reddish-orange lighting applications. The optimized properties of the Sm /Eu co-doped potassium phosphate glass might be promising for optical materials.

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“…As a glass former, ZnO enters the network with ZnO 4 structural units. As a network modifier, zinc ion is octahedrally coordinated [16][17][18]. However, one of the main disadvantages of phosphate glasses is their poor chemical durability which limits their use in many fields [18].…”

Section: Introductionmentioning

confidence: 99%

Standard Formation Enthalpy of Na2O–ZnO–P2O5 Series Glasses

2018

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100 − x)NaPO 3 -xZnO (0 ≤ x ≤ 33 mol%) phosphate glasses have been prepared using the conventional melt quenching technique. Amorphous state was checked up by X-ray diffraction. Glasses have been investigated in detail by mean of differential scanning calorimetry, inductively coupled plasma. Incorporation of ZnO oxide increases the T g value and the thermal stability of samples. For this glass series, 31 P solid state magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy revealed the decrease of Q 2 tetrahedral sites and the increase of phosphate dimers (Q 1 ), when ZnO oxide is progressively introduced, suggesting the shortening of metaphosphate chains. Dissolution of glasses has been followed calorimetrically and showed a change in thermal signs resulting from the depolymerization of metaphosphate groups when ZnO oxide is added. A thermochemical cycle involving a number of dissolution and mixing processes have been carried out in order to get the standard enthalpy of formation of these glasses. Calculation of these quantities needs the standard enthalpy of formation of sodium trimetaphosphate. Formation enthalpy of glasses increases with the incorporation of ZnO oxide.

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Influence of CuO and ZnO addition on the multicomponent phosphate glasses: Spectroscopic studies

Cited by 38 publications

References 37 publications

Correlation between glass transition effect and structural changes in multicomponent iron phosphate-silicate glasses

Correlation between glass transition effect and structural changes in multicomponent iron phosphate-silicate glasses

Spectral investigations on Eu³⁺,Sm³⁺‐doped and Sm³⁺/Eu³⁺ co‐doped potassium‐fluoro‐phosphate glass emitting intense orange‐red for lighting applications

Standard Formation Enthalpy of Na2O–ZnO–P2O5 Series Glasses

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Influence of CuO and ZnO addition on the multicomponent phosphate glasses: Spectroscopic studies

Cited by 38 publications

References 37 publications

Correlation between glass transition effect and structural changes in multicomponent iron phosphate-silicate glasses

Correlation between glass transition effect and structural changes in multicomponent iron phosphate-silicate glasses

Spectral investigations on Eu3+,Sm3+‐doped and Sm3+/Eu3+ co‐doped potassium‐fluoro‐phosphate glass emitting intense orange‐red for lighting applications

Standard Formation Enthalpy of Na2O–ZnO–P2O5 Series Glasses

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Spectral investigations on Eu³⁺,Sm³⁺‐doped and Sm³⁺/Eu³⁺ co‐doped potassium‐fluoro‐phosphate glass emitting intense orange‐red for lighting applications