Effect of modifiers field strength on optical, structural and mechanical properties of lanthanum borosilicate glasses

Kaur, Gurbinder; Pandey, O.P.; Singh, K.

doi:10.1016/j.jnoncrysol.2012.06.006

Cited by 95 publications

(48 citation statements)

References 41 publications

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“…Kaur et. al has also made studies on lanthanum borosilicate glasses and determined Weibull moduli between 11.93-18.53 [20], which are close to those of the present research for which m values of 5 to 20 are claimed in literature for technical ceramics [5]. Low Weibull modulus exhibits low reliability consequently, fracture toughness is broadly distributed.…”

Section: Resultssupporting

confidence: 88%

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Investigation of Indentation Fracture Toughness (KIC) and Weibull Parameters of 0.25Li2O.2SiO2-0.75BaO.2SiO2 Glass-Ceramic

Ertuǧ

Çetiner

Gökçe

et al. 2017

Archives of Metallurgy and Materials

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In the present study, mechanical properties of 0.25Li 2 O.2SiO 2 -0.75BaO.2SiO 2 glass-ceramic were investigated. The transformations' temperatures were determined by DTA instrument. The optimum nucleation temperature was found to be 540°C. This suggested the crystallization temperatures as 675, 720 and 800°C. After carrying out crystallization heat treatments, Vickers indentation test was applied. In order to determine the indentation fracture toughness (K IC ), crack half-length ‚c' of the samples was measured. To calculate K IC , Young's modulus, E and the measured hardness, H v were used. Using K IC and probability of fracture ‚P', ln ln[1/(1 -P)] -ln K IC graph was drawn based on the Weibull distribution equation. Consequently, Weibull modulus, ‚m' and scale parameter, ‚K 0 ' were determined and compared with each other.

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Section: Resultssupporting

confidence: 88%

“…Low Weibull modulus exhibits low reliability consequently, fracture toughness is broadly distributed. The scale parameter in this research, K 0 was calculated to be between 0.13-1.02 MPa.m ½ , which is similar to those in Kaur et al's study [20]. …”

Section: Resultssupporting

confidence: 87%

Investigation of Indentation Fracture Toughness (KIC) and Weibull Parameters of 0.25Li2O.2SiO2-0.75BaO.2SiO2 Glass-Ceramic

Ertuǧ

Çetiner

Gökçe

et al. 2017

Archives of Metallurgy and Materials

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“…The Urbach energy of T0N, T2N, T4N and T6N samples is 0.038, 0.098, 0.098, 0.150 eV, respectively. Higher Urbach energy in doped samples depicts more disorder in them as compared to the undoped samples (Kaur et al 2012). Many factors like dislocations, electric field of defects and thermal vibrations can cause the tailing of energy states in the forbidden gap.…”

Section: Drs Analysismentioning

confidence: 98%

Study of photocatalytic degradation of environmentally harmful phthalate esters using Ni-doped TiO2 nanoparticles

Singla

Pandey

Singh

2015

Int. J. Environ. Sci. Technol.

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Undoped and Ni-doped TiO 2 nanoparticles are synthesized using sol-gel technique. The physical, structural, optical and thermal properties of the samples are investigated using X-ray powder diffraction, Fourier transform infrared spectroscopy, transmittance electron microscopy, UV-visible diffuse reflectance and thermogravimetric analysis. The photocatalytic activity of the samples is investigated by the photocatalytic degradation of phthalate esters. Phthalate esters have been considered as endocrine disrupting compounds. Nidoped TiO 2 samples show better photocatalytic activity as compared to undoped TiO 2 sample. The greater photocatalytic activity of doped samples as compared to undoped TiO 2 can be attributed to the production of more number of electron-hole pairs in doped samples.

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“…Lots of research has been carried out on borosilicate glasses due to their wide applications as electrodes, sealants, planar optical wave-guides, optical lenses and glass fibers [1][2][3][4]. As compared to the borosilicate glasses, the phosphate glasses remain amorphous even after accommodating higher concentrations of transition ions [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of P2O5 on optical parameters of (25−x) CaO–xP2O5–B2O3–SiO2–ZnO sol–gel glasses: a theoretical assessment

Kaur

Pickrell

Sriranganathan

2015

J Sol-Gel Sci Technol

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The present investigation is an attempt to address the effect of P 2 O 5 on the optical properties, cross link density (n c ) as well as theoretical parameters like Poisson's ratio and bulk modulus for (25-x)%CaO-x%P 2 O 5 -60%SiO 2 -5%B 2 O 3 -10%ZnO (x = 5, 10, 15, 20) novel sol-gel glasses. The optical basicity, oxide polarisability, direct/indirect band gaps and theoretical elastic constants have been calculated for all the glasses. In addition to this, the cross-link density, average force stretching constant and number of network bonds per unit volume (n b ) have been calculated. The values of optical basicity and polarisabilty have allowed the same trend for all these glasses. The cross-link density decreases when the P 2 O 5 content increases from 5 to 20 %. Graphical Abstract0 0.5 1 1.5 2 2.5 3 3.5 4 CP5 CP10 CP15 CP20 Indirect /direct band gap and Urbach energy (in eV) Glass samples Eg(Ind) Eg(Dir) EuIndirect/Direct band gap and Urbach energy for all the samples.

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Effect of modifiers field strength on optical, structural and mechanical properties of lanthanum borosilicate glasses

Cited by 95 publications

References 41 publications

Investigation of Indentation Fracture Toughness (KIC) and Weibull Parameters of 0.25Li2O.2SiO2-0.75BaO.2SiO2 Glass-Ceramic

Investigation of Indentation Fracture Toughness (KIC) and Weibull Parameters of 0.25Li2O.2SiO2-0.75BaO.2SiO2 Glass-Ceramic

Study of photocatalytic degradation of environmentally harmful phthalate esters using Ni-doped TiO2 nanoparticles

Effect of P2O5 on optical parameters of (25−x) CaO–xP2O5–B2O3–SiO2–ZnO sol–gel glasses: a theoretical assessment

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