Structural study of Fe2O3-Cr2O3-Na2O-P2O5 glass system doped with Cr2O3 through spectroscopic and magnetic properties

Makhkhas, Youssef; Sayouty, E.H.

doi:10.1016/j.matpr.2019.07.705

Cited by 5 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Specifically, a substantial presence of chromium in the glass composition may offer an increased concentration of nucleation sites for crystal growth. Crystallization typically occurs when the glass's cooling rate is slow enough to enable atom rearrangement, leading to the formation of ordered crystalline structures rather than remaining in a disordered, amorphous state [13,20].…”

Section: Structural and Glassy Featuresmentioning

confidence: 99%

“…The addition of a minute quantity of Cr 2 O 3 facilitates the formation of glassy materials in host materials. However, an excessive amount of Cr 2 O 3 leads to the development of glass ceramics, typically achieved through controlled crystallization during the heat treatment process [12][13][14]. However, it is possible to produce glass ceramics without the use of large thermal energy during the heat treatment process, by adding an appropriate amount of chromium oxide.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ramifications of chromium-to-bismuth ions substitution on the structural and optical characteristics of bismuth borate glasses for optoelectronic applications

Moustafa,

Mokhtar,

Abdelwahed

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

The exploration of optoelectronic materials with distinctive properties is still ongoing. To this end, a series of quaternary glassy materials of the composition 15Na2O–65B2O3–(20–x)Bi2O3–xCr2O3, denoted as NBBC, is synthesized using the melt quenching method, where x = 0.0, 2.0, 4.0, 6.0, 8.0, and 10.0 mol%. X-ray diffraction (XRD) confirms that the glasses under investigation are amorphous, except for the sample with a molar ratio of 10% Cr2O3, which showed a polycrystalline structure. FTIR analysis of the NBBC glasses reveals structural changes affecting Bi-O and B-O vibrations, suggesting a correlation between composition and optical properties. Interestingly, the bandgap energy of the NBBC glasses, determined optically, demonstrates a reduction from 2.881 eV to 1.941 eV with increasing Cr2O3 content. Conversely, the tail energy exhibits an opposite trend. The observed reduction in the bandgap with increasing Cr-ions is attributed to the introduction of chromium in the glassy matrix which changes the electronic structure and enhances the light absorption efficiency. Furthermore, various optical parameters are calculated, such as the optical constants, dielectric constants, loss energy, the density of coverage, sheet resistance, the figure of merit factor, and dispersion parameters. Notably, all of these parameters demonstrate a remarkable sensitivity to the gradual increment of chromium ions. These findings imply that the NBBC glasses could be appropriate for optoelectronic purposes.

show abstract

Section: Structural and Glassy Featuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ramifications of chromium-to-bismuth ions substitution on the structural and optical characteristics of bismuth borate glasses for optoelectronic applications

Moustafa,

Mokhtar,

Abdelwahed

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Thermal parameter values of the studied glasses. Also, the activation energy for glass transition E gl or for crystallization E cp and the frequency factor k o are attributed to the variations in the values of T gl and T cp with (δ) as mentioned earlier[4,[38][39][40][41][42] as:…”

mentioning

confidence: 94%

“…To controlling their structure, awareness has focused on their novel optical and thermal properties compared with silicate and borate-based glasses [1,2]. Mixing PbO with P 2 O 5 glasses extended their glass formation range, enhance their glass stability and moisture-resistant at the same while improving their densities and refractive indices [3][4][5][6][7][8]. The enhancement of these properties contributed to the synthesis of advanced optical tools, enhanced medical diagnostic devices, security X-ray screens, and excellent radiation shielding [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Mössbauer and differential thermal analysis studies of iron alkali lead-phosphate glasses

El-Denglawey¹,

Saddeek²,

El-Bahnasawy³

et al. 2020

Phys. Scr.

View full text Add to dashboard Cite

This work reports on the effect of the increment of Fe2O3 in a network of phosphate glasses involving Al2O3, Na2O and PbO by DTA and Mössbauer techniques. The analysis of Mössbauer suggests oxidation of Fe2+ ions in the distorted bipyramidal to Fe3+ in the same site. This procedure creates non-bridging oxygens joined with Fe2+ octa that weakens the phosphate network whenever the Fe2O3 content increases. The thermal parameters of the phosphate network will be affected by this weakness. Thus, both the glass transition temperature (T gl ) and the crystallization peak temperature (T cp ) on the one hand and the activation energies for glass transition E gl and for crystallization (E gl and E cp ) on the other hand will decrease as a function of Fe2O3. This decrease will be discussed following Lasocka’s relationships that present a good correlation between T gl and T cp . Furthermore, the glass transition temperature (T gl ) was correlated with the glass fragility (m) and with the elastic parameters of the phosphate network such as the bulk (K) and shearing (G) moduli.

show abstract

Gd2O3-doped calcium borophosphate glasses for optical and medical applications: experimental and theoretical studies

Alfryyan,

Al-Ghamdi,

Alsaif

et al. 2024

Appl. Phys. A

View full text Add to dashboard Cite

Structural study of Fe2O3-Cr2O3-Na2O-P2O5 glass system doped with Cr2O3 through spectroscopic and magnetic properties

Cited by 5 publications

References 24 publications

Ramifications of chromium-to-bismuth ions substitution on the structural and optical characteristics of bismuth borate glasses for optoelectronic applications

Ramifications of chromium-to-bismuth ions substitution on the structural and optical characteristics of bismuth borate glasses for optoelectronic applications

Mössbauer and differential thermal analysis studies of iron alkali lead-phosphate glasses

Gd2O3-doped calcium borophosphate glasses for optical and medical applications: experimental and theoretical studies

Contact Info

Product

Resources

About