Effects Of Mno-Doping On The Structure Of Sodium Metaphosphate Glasses

Zotov, Ν.; Schlenz, Hartmut; Brendebacha, B.; Modrowa, H.; Hormesa, J.; Reinauerc, F.; Glaumc, R.; Kirfel, Α.; Paulmannd, C.

doi:10.1515/zna-2003-7-806

Cited by 24 publications

(10 citation statements)

References 35 publications

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“…The glass network of metaphosphate glasses of the join MnPO 3 -SrPO 3 is based on polymerlike chains of phosphate tetrahedra with two bridging and two terminal oxide ions, the Q 2 structural units [PO 2 O 2/2 ] - [22,24,25]. These chains are cross-linked to a higher or lesser extent by the modifier cations.…”

Section: Resultsmentioning

confidence: 99%

“…Here, phosphate glasses with their typically low optical dispersion, elevated refractive index, high Abbé number, broad transmission window provide an interesting alternative. Most importantly, high levels of TM oxides can be incorporated into these glasses [21][22][23][24][25]. In addition, with only a few exceptions [21,22], most phosphate glasses provide a rather acidic environment in which many polyvalent ions can be stabilized in their lower redox states [22,23].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic and magneto-optical quenching in (Mn^2+, Sr^2+) metaphosphate glasses

Winterstein¹,

Akamatsu²,

Möncke³

et al. 2013

Opt. Mater. Express

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Transition metal ions such as Mn 2+ , Fe 2+ , or Co 2+ provide an interesting alternative to rare earth dopants in optically active glasses. In terms of their magneto-optical properties, they are not yet very well exploited. Here, we report on the effect of Mn 2+ on Faraday rotation in a metaphosphate glass matrix along the join Mn x Sr 1-x (PO 3 ) 2 with x = 0...1. Mn 2+ shows small optical extinction in the visible spectral range and, compared to other transition metal ions, a high effective magnetic moment. At high Mn-levels, however, the magneto-optical activity of Mn 2+ is strongly quenched due to ionic clustering. The magnetic properties of the heavily Mn 2+ -loaded phosphate matrix are dominated by a superexchange interaction in the Mn 2+ -O-Mn 2+ bridge with antiparallel spin alignment between Mn 2+ and O 2species. The apparent paramagnetic potential of Mn 2+ species can therefore not be exploited at room temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic and magneto-optical quenching in (Mn^2+, Sr^2+) metaphosphate glasses

Winterstein¹,

Akamatsu²,

Möncke³

et al. 2013

Opt. Mater. Express

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“…The molar percentages of MnO that have been added to this parent glass are very small (0.79–4) mol%, but nevertheless a larger shift of up to 3.4 ppm was observed for Mn‐5 . The structure of the parent glass, initially dominated by Q 2 , has been shown to be modified from Q 2 to Q 1 with increasing MnO content (or to exist as a mixed hybrid state with a mostly Q 2 character (approaching 75%)) as determined by Raman spectroscopy …”

Section: Resultsmentioning

confidence: 90%

“…The structure of the parent glass, initially dominated by Q 2 , has been shown to be modified from Q 2 to Q 1 with increasing MnO content (or to exist as a mixed hybrid state with a mostly Q 2 character (approaching 75%)) as determined by Raman spectroscopy. 41…”

Section: Structure Of Glassesmentioning

confidence: 99%

The Influence of Cu²⁺ and Mn²⁺ Ions on the Structure and Crystallization of Diopside–Calcium Pyrophosphate Bioglasses

Ben–Arfa

Salvado

Ferreira

et al. 2016

Int J of Appl Glass Sci

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The influence of two divalent cations, Cu 2+ and Mn 2+ , on the structure, sintering, and crystallization of glasses and glass-ceramics in the diopside-calcium pyrophosphate system (90 wt.% diopside (CaMgSi 2 O 6 ), 10 wt.% calcium pyrophosphate (Ca 2 P 2 O 7 )) was investigated. Glasses with 1, 3, and 5 wt% MnO or CuO additives were prepared by melt-quenching and characterized by XRD, 29 Si and 31 P NMR, DTA, and FTIR This revealed that the silicate network is predominantly coordinated in Q 2 (Si) units for all glasses, while phosphorus tends to inhabit an orthophosphate (Q 0 ) environment. All glasses had a high rate of bioactivity after immersion in simulated body fluid. A slight depolymerization was observed in the doped glasses leading to lower T g values in comparison with the parent glass. All glass-ceramics exhibited the formation of diopside as the primary crystalline phase after sintering at 850°C/1 h. In comparison with the parent glass, the doped glasses featured significantly larger processing windows (ΔT = T c -T g ), ensuring good sinterability. Further, with increasing doping levels, the glasses exhibited a gradual decrease in T p and ΔT, suggesting an increased tendency toward devitrification. All Cu-and Mn-containing glasses exhibited the formation of hydroxyapatite, making them good candidates for biomedical applications and tissue engineering.

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“…Moreover, Zotov et al have been studied the manganese phosphate glasses with a general formula (MnO) x (NaPO 3 ) 1-x when x = 0.0, 0.024, 0.048 and 0.167 mol [48].…”

Section: Introductionmentioning

confidence: 99%

Structural and Calorimetric Studies of Zinc, Magnesium and Manganese Based Phosphate and Phosphate-Silicate Glasses

Omrani¹,

Jemal²,

Khattech³

et al. 2020

Contemporary Topics About Phosphorus in Biology and Materials

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Glasses of the (50-x/2)Na 2 O-xMO-(50-x/2)P 2 O 5 (M = Zn, Mg or Mn) (0 ≤ x ≤ 33 mol%), (50-x)Na 2 O-xMO-50P 2 O 5 (M = Zn, Mn) (0 ≤ x ≤ 33 mol%), and (0.9-x) NaPO 3 -xSiO 2 -0.1ZnO (0 ≤ x ≤ 0.1 mol) were prepared by the melt quenching technique. Samples were investigated by means of X-ray diffraction, Archimede's method, ellipsometry, Fourier-transformed infrared (FTIR), Raman, 31P solid state magic angle spinning nuclear magnetic resonance (MAS-NMR), UV-visible spectroscopy and calorimetry. For zinc, manganese and magnesium phosphate glasses, the increase in density with the addition of MO oxide suggests the compactness of the vitreous network. For zinc phosphate silicate glasses, the variations of density and refractive index were attributed to the structural changes when SiO 2 oxide is progressively introduced. The increase in the glass transition temperature (Tg) reflects an increase in the cross-link strength of the structure as MO and SiO 2 oxides are gradually incorporated. For all glass composition, spectroscopic investigations revealed the depolymerization of metaphosphate chains (Q 2 ) allowing the formation of phosphate dimers (Q 1 ). Calorimetric dissolution shows that the dissolution is endothermic for lower MO content and become exothermic when x rises. For (50-x/2)Na 2 O-xZnO-(50-x/2)P 2 O 5 (0 ≤ x ≤ 33 mol%) glasses, the formation enthalpy increases with the incorporation of ZnO oxide.

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Effects Of Mno-Doping On The Structure Of Sodium Metaphosphate Glasses

Cited by 24 publications

References 35 publications

Magnetic and magneto-optical quenching in (Mn^2+, Sr^2+) metaphosphate glasses

Magnetic and magneto-optical quenching in (Mn^2+, Sr^2+) metaphosphate glasses

The Influence of Cu²⁺ and Mn²⁺ Ions on the Structure and Crystallization of Diopside–Calcium Pyrophosphate Bioglasses

Structural and Calorimetric Studies of Zinc, Magnesium and Manganese Based Phosphate and Phosphate-Silicate Glasses

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Effects Of Mno-Doping On The Structure Of Sodium Metaphosphate Glasses

Cited by 24 publications

References 35 publications

Magnetic and magneto-optical quenching in (Mn^2+, Sr^2+) metaphosphate glasses

Magnetic and magneto-optical quenching in (Mn^2+, Sr^2+) metaphosphate glasses

The Influence of Cu2+ and Mn2+ Ions on the Structure and Crystallization of Diopside–Calcium Pyrophosphate Bioglasses

Structural and Calorimetric Studies of Zinc, Magnesium and Manganese Based Phosphate and Phosphate-Silicate Glasses

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The Influence of Cu²⁺ and Mn²⁺ Ions on the Structure and Crystallization of Diopside–Calcium Pyrophosphate Bioglasses