Effects of Fe2O3 replacement of ZnO on elastic and structural properties of 80TeO2–(20−x)ZnO–xFe2O3 tellurite glass system

Azianty, S.; Yahya, A. K.; Halimah, M.K.

doi:10.1016/j.jnoncrysol.2012.04.017

Cited by 37 publications

(13 citation statements)

References 46 publications

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“…16 36 38 The spectral range of 574-587 cm −1 and 666-696 cm −1 were attributed to symmetrical stretching vibrations of trigonal bipyramidal (tbp) TeO 4 with BO, 16 38 39 whereas the band at 788-804 cm −1 was assigned to stretching vibrations of the trigonal pyramidal (tp) TeO 3 group. 16 36 38 39 Figure 4 shows the variation of dielectric constant ( with frequency for the 15Fe 2 O 3 -5MnO 2 -80TeO 2 glass samples at various temperatures. The decreased with the increase in frequency, but increased with the increase in temperature.…”

Section: Resultsmentioning

confidence: 99%

“…Interestingly, TeO 2 is an incipient glass network former; hence, does not form glass on their own, but readily forms glass only with a modifier such as alkali, alkaline earth, and transition metal oxides (TMO) or other glass formers. 14 15 Recent studies on the spectroscopic, mechanical, and electrical properties of tellurite-based glasses mixed with different network formers and modifiers are available in the literature [4,16,17]. Introduction of transitionmetal ions (TMI) with more than one valence state Article have exhibited semiconducting properties, [18][19][20][21][22][23] where conduction can occur by electron transfer from ions in the lower valence state to those in a higher valence state.…”

Section: Introductionmentioning

confidence: 99%

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Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3–(20 – x)MnO2–80TeO2 glass system

et al. 2016

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Glasses with xFe 2 O 3 -(20−x MnO 2 -80TeO 2 (x = 2, 5, 10, 15, and 20 mol%) composition were prepared by meltquenching technique to investigate the effects of mixed-transition metal ion Fe 2+/3+/ /Mn 3+/4+ on AC conductivity and dielectric properties using impedance spectroscopy. Dielectric constant showed strong variation with Fe 2 O 3 at a frequency ≥10 kHz, where decreased to a minimum value at x = 10 mol% before increasing for x > 10%. The decrease in may be attributed to some form of hindrance effect on heavy dipoles caused by the mixed transition-ion effect (MTE). Meanwhile, variation of AC conductivity with Fe 2 O 3 showed non-linear increase for x ≤ 10 mol% before dropping to a minimum at 15 mol% Fe 2 O 3 . This result was attributed to Anderson localization because of the disorder in the glass system. Conductivity analysis showed that the conduction mechanism at the dispersion region for x = 2 mol% followed the correlated barrier hopping (CBH) model, while the mechanism transformed to the overlapping large polaron tunnelling (OLPT) model at higher Fe 2 O 3 , content (x > 2 mol%). The electric modulus of the investigated samples showed asymmetric peak of the imaginary part of electric modulus (M ), which reflected a non-Debye type relaxation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion xFe2O3–(20 – x)MnO2–80TeO2 glass system

et al. 2016

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“…As displayed in Figure 6, the increment of molar volume was directly proportional to the molar fraction of manganese dioxide in the glass sample. Based on Azianty et al, (2012) [19], the increment of NBO in the glass network had been proposed as the reason behind the increment in molar volume values. The experimental result adhered to the theoretical result which stated that density was inversely proportional to molar volume.…”

Section: Density and Molar Volumementioning

confidence: 99%

“…This eventually made the glass less rigid. A decrease in rigidity of glass caused the decrease in ultrasonic velocities and and thus, an increase in the Poisson's ratio [19]. The glass was also considered as high cross link density due to its low range of order from 0.2 to 0.3.…”

Section: Elastic Propertiesmentioning

confidence: 99%

Comparison Study of Elastic, Physical and Structural Properties for Strontium Oxide and Manganese Oxide in Borotellurite Glasses for High Strength Glass Application

Nidzam

Kamari

Sukari

et al. 2021

Preprint

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In this research the melt quenching technique method was used to synthesize two series of borotellurite glass systems doped with manganese and strontium. Elastic measurement, X-Ray Diffraction and Fourier Transform Infrared spectroscopy were used to characterize the prepared glass samples. The increment of molar volume confirmed the theory that molar volume is inversely proportional to the density parameters. A broad hump appeared in XRD as the samples shown pure amorphous nature. In FTIR, the functional group vibrations of tellurite network were recorded such as TeO4 trigonal bipyramids and TeO3 trigonal pyramids by addition of both dopants. On the other hand, ultrasonic velocity was used to determine the elastic moduli of the glass such as bulk modulus, shear modulus, longitudinal modulus, Young’s Modulus, microhardness and Poisson’s ratio which showed decreasing and increasing trends with the increased concentration of MnO2 and SrO respectively.

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“…Tellurite-based glasses posses very interesting physical properties such as low melting temperature [1], good mechanical strength and chemical resistance [1,2], high values of linear and non-linear refractive indices [3][4][5][6][7] and good optical transmission in a wide range of infrared (IR) [8,9] and visible wavelengths [3,5,[10][11][12]. Studying the elastic properties is very important for selection of glasses for a particular application, such as optical fibres, because it gives useful information about the structural stability [8,13,14], strength and rigidity of the glass samples [15,16]. Several elastic studies have been reported for the binary and ternary tellurite glasses, such as Nb 2 O 5 -TeO 2 [17], TeO 2 -La 2 O 3 [18,19], TeO 2 -ZnO [12,20], TeO 2 -V 2 O 5 [8], TeO 2 -WO 3 -PbO [21,22] [24] and TeO 2 -WO 3 -K 2 O [25].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the elastic properties of monovalent oxides using $$\hbox {TeO}_{2}$$ TeO 2 -based glasses

et al. 2017

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Quaternary tellurite glasses with composition 75TeO 2-5WO 3-15Nb 2 O 5-5M x O y in mol%, where M x O y = (Na 2 O, Ag 2 O, ZnO, MgO, CuO, NiO, TiO 2 , MnO 2), were prepared by the normal melt-quenching method. The ultrasonic velocities (longitudinal and shear) were measured in these glasses using the pulse-echo technique at room temperature. Their elastic moduli, microhardness and Debye temperature were calculated and discussed in terms of the modifier's ionicity and quantitatively in terms of number of bonds per unit volume and the cross-link density. In this study, the values of ultrasonic velocities, elastic moduli, Debye temperature and microhardness were found to be strongly dependent on three factors, namely: (i) modifier's ionicity; (ii) trigonal pyramid (TeO 3)/trigonal bipyramid (TeO 4) ratio; and (iii) glass transition temperature T g. We used the Makishima and Mackenzie's model to calculate the theoretical elastic moduli and to indicate that the experimental values were in good agreement with the theoretical values.

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Effects of Fe2O3 replacement of ZnO on elastic and structural properties of 80TeO2–(20−x)ZnO–xFe2O3 tellurite glass system

Cited by 37 publications

References 46 publications

Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion <I>x</I>Fe<SUB>2</SUB>O<SUB>3</SUB>–(20 – <I>x</I>)MnO<SUB>2</SUB>–80TeO<SUB>2</SUB> glass system

Anomalous dielectric constant and AC conductivity in mixed transition-metal-ion <I>x</I>Fe<SUB>2</SUB>O<SUB>3</SUB>–(20 – <I>x</I>)MnO<SUB>2</SUB>–80TeO<SUB>2</SUB> glass system

Comparison Study of Elastic, Physical and Structural Properties for Strontium Oxide and Manganese Oxide in Borotellurite Glasses for High Strength Glass Application

Evaluation of the elastic properties of monovalent oxides using $$\hbox {TeO}_{2}$$ TeO 2 -based glasses

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