Thermal and spectral behavior of (Y,Eu)VO4 powder

Harabor, A.; Rotaru, P.; Harabor, N. A.

doi:10.1007/s10973-012-2512-2

Cited by 15 publications

(3 citation statements)

References 16 publications

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“…There are some approximation methods to define the breadth b in the Scherrer formula to calculate the average crystallite sizes [14]. In the assumption of ellipsoidal particles [15][16][17][18], it is found that the Jones more purely empirical approach will provide the best means for making allowance for the dimensions of the samples. In this last case using the integral breadths (b i ), when k = 1.333, we obtained for (Bi,Pb)-2223 particle dimensions a mean value of about 42.98 nm.…”

Section: Resultsmentioning

confidence: 99%

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Thermal properties, texture, second-order stress, and magnetic susceptibility of the Bi1.8Pb0.3Sr2Ca2Cu3.3Ox

Harabor

Rotaru

Harabor

2014

J Therm Anal Calorim

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Mono-phase high critical temperature (Bi,Pb)-2223 superconductor from the off-stoichiometric Bi 1.8 Pb 0.3 Sr 2 Ca 2 Cu 3.3 O x belonging to the tetragonal system, has been obtained. We studied the crystalline structure, the stress of second order, and the texture of the surface pellet, in the framework of XRD diffractometry. Results of the thermal measurements made in the nitrogen, with a heating rate of 10 K min -1 , from room temperature (RT) to 1273.15 K, show a slow mass decrease of 1.25 % from RT to 1003.15 K probably due to the elimination of water, oxygen, and of the other gases accumulated on the crystallite surface through chemical adsorption. Two endothermic processes were evidenced on DSC, and DTG curves: the first in the range of 1135.15-1193.15 K (melting and slow decomposition), and another after 1217.45 K (decomposition). The contribution of crystal lattice to the estimated specific heat capacity was in conformity with the Einstein model, giving for the Einstein temperature a value of 1297.5 K. In conformity with the Müller critical state model, we found linear dependences for intragrain critical transition temperature, T g , and intergrain coupling temperature, T p , versus the amplitude of the external AC magnetic fields. There was evidenced that intergrain critical currents are five orders smaller than the intragrain critical currents.

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Section: Resultsmentioning

confidence: 99%

“…In conformity with the Einstein model [12,16], where the three N-independent oscillators are considered to describe a system of N atoms, we have calculated the Einstein temperature (T E ) from the expression (15) for the heat capacity (C):…”

Section: Resultsmentioning

confidence: 99%

Thermal properties, texture, second-order stress, and magnetic susceptibility of the Bi1.8Pb0.3Sr2Ca2Cu3.3Ox

Harabor

Rotaru

Harabor

2014

J Therm Anal Calorim

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“…Eu 3? is one of the most used rare earth ions due to its ff transitions in red wavelength region [9][10][11]. Red lightemitting Eu 3? phosphors are used in display panels and lamps.…”

Section: Introductionmentioning

confidence: 99%

Investigation of phase formation dependency of photoluminescence properties of Eu3+ in Mg4Al2O7:Eu3+,Dy3+ and Ca4Al2O7:Eu3+,Dy3+ red-emitting phosphors

Öztürk

Karacaoğlu

2015

J Therm Anal Calorim

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Rare earth-doped Mg were synthesized by the solid-state reaction method at 1,400°C. The phosphors were characterized by X-ray powder diffraction, photoluminescence, thermogravimetry and differential thermal analysis and scanning electron microscopy. X-ray powder diffraction studies show that the Mg 4 Al 2 O 7 :Eu 3? ,Dy 3? phosphor was crystallized in the triclinic crystal system but that Ca 4 Al 2 O 7 : Eu 3? ,Dy 3? was not. The phosphors show the characteristic broad band phosphorescence of Eu 3? . This broad band phosphorescence has red emission bands in the range of 550-700 nm corresponding to 5 D 0 ? 7 F j (j: 1, 2, 3,) transitions of Eu 3? .

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Temperature Dependence of Specific Heat of Human Enamel and Dentin: An Experimental Study

2021

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Thermal and spectral behavior of (Y,Eu)VO4 powder

Cited by 15 publications

References 16 publications

Thermal properties, texture, second-order stress, and magnetic susceptibility of the Bi1.8Pb0.3Sr2Ca2Cu3.3Ox

Thermal properties, texture, second-order stress, and magnetic susceptibility of the Bi1.8Pb0.3Sr2Ca2Cu3.3Ox

Investigation of phase formation dependency of photoluminescence properties of Eu3+ in Mg4Al2O7:Eu3+,Dy3+ and Ca4Al2O7:Eu3+,Dy3+ red-emitting phosphors

Temperature Dependence of Specific Heat of Human Enamel and Dentin: An Experimental Study

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