Polarized IR and Raman spectra of Ca2MgSi2O7, Ca2ZnSi2O7 and Sr2MgSi2O7 single crystals: Temperature-dependent studies of commensurate to incommensurate and incommensurate to normal phase transitions

Hanuza, J.; Ptak, Maciej; Mączka, Mirosław; Hermanowicz, K.; Lorenc, J.; Kaminskii, Alexander A.

doi:10.1016/j.jssc.2012.02.051

Cited by 46 publications

(35 citation statements)

References 33 publications

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“…The rare earth elements‐doped Sr 2 MgSi 2 O 7 phosphor, as the representative pyrosilicate, has been studied extensively over past decades . These long afterglow materials are capable of absorbing light when excited by a light source, and then emit intense broad band light in the visible range over a long period of time, when brightness and decay times are greatly superior to the traditional long afterglow material, sulphides .…”

Section: Introductionmentioning

confidence: 99%

Effect of cooling rate on the microstructure and luminescence properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ materials

et al. 2017

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Sr MgSi O :Eu ,Dy long afterglow materials were prepared by a high-temperature solid-state reaction method with different cooling rates. The cooling rate had a slight effect on X-ray diffraction patterns and photoluminescence performance, but significantly modified the grain boundaries and long afterglow properties of the Sr MgSi O :Eu ,Dy materials. When the cooling rate was 1°C/min, grains remained intact with clear grain boundaries. As the cooling rate increased from 1°C/min to 5°C/min, some grain boundaries became indistinguishable. The afterglow properties were optimized, presenting best performance at the cooling rate of 3°C/min. The trap state was investigated and illustrated through thermoluminescence curves. The depths of the traps of all the samples were unchanged, whereas densities changed to a large extent, leading to different afterglow properties. The retrapping process is discussed based on the afterglow curves.

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Section: Introductionmentioning

confidence: 99%

Effect of cooling rate on the microstructure and luminescence properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ materials

et al. 2017

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“…would indicate the existence of a low quantity of hydrogen and oxygen elements at the porous surface. However, for PS/Co, the intensity of this band was increased and its position was slightly shifted to higher energies; we attributed this result to the growth of other 2 is attributed to silica (SiO 3 ) [21]. At C 500°, the porous silicon is completely oxidized and is transformed to silica.…”

Section: -Results and Discussionmentioning

confidence: 86%

Optical study of annealed cobalt–porous silicon nanocomposites

Bouzourâa

Rahmani

Zaïbi

et al. 2013

Journal of Luminescence

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We report Raman and photoluminescence studies of cobalt-porous silicon nanocomposites (PS/Co). Cobalt was introduced in porous silicon (PS) by immersion method using CoCl 2 aqueous solution. The presence of cobalt in PS matrix was identified by FTIR spectroscopy and EDX analyses. The Raman spectroscopy revealed the presence of Si bonded to cobalt oxide in PS/Co. We discuss also the Raman spectra of PS and PS/Co samples under different annealing temperatures ranging from room temperature (RT) to C 600°. The optical properties

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Section: Crystallization Effectsmentioning

confidence: 95%

“…Spectra of selected devitrificates are presented in and 1010 cm -1 which corresponded to Si-O bonds characteristic for diopside [22]. The existence of absorption bands at about 500, 560, 725, 1000 and 1086 cm -1 could be attributed to the P-O stretching modes of PO 3 [22]. From the presented analysis of crystallization products, the consistency of the type of the crystallizing phases can be seen with the well-known classification of phosphate glasses, based on the O/P ratio [25].…”

Section: Crystallization Effectsmentioning

confidence: 99%

Thermal properties of MnO2 and SiO2 containing phosphate glasses

Szumera

Wacławska

Sułowska³

2015

J Therm Anal Calorim

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Thermal properties of glasses from the P 2 O 5 -SiO 2 -K 2 O-MgO-CaO system modified by MnO 2 addition was studied by DSC, XRD and FTIR methods. It has been found that the replacement of MgO and CaO modifiers by MnO 2 in the structural network of phosphate glasses results in decrease in the glass transition temperature (T g ) and thermal stability parameter (DT). The identified crystallization products proved to be diversified, including different type of polyphosphates and silicates. It was determined that the type of the crystallizing phosphate phases is consistent with the classification of phosphate glasses, based on the O/P ratio. During the crystallization in higher temperature ranges and with the content of MnO 2 over 25 mol%, a change of crystallization products was noted, including the transition of the diopside type silicate (CaMgSi 2 O 6 ) into the akermanite type silicate (Ca 2-MgSi 2 O 7 ). Simultaneously, the nature of transitions taking place during heating of the analyzed glasses was explained on the basis of crystallochemical factors (strengths of bonds) and chemical affinity of the glass components (DG of formation).

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Polarized IR and Raman spectra of Ca2MgSi2O7, Ca2ZnSi2O7 and Sr2MgSi2O7 single crystals: Temperature-dependent studies of commensurate to incommensurate and incommensurate to normal phase transitions

Cited by 46 publications

References 33 publications

Effect of cooling rate on the microstructure and luminescence properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ materials

Effect of cooling rate on the microstructure and luminescence properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ materials

Optical study of annealed cobalt–porous silicon nanocomposites

Thermal properties of MnO2 and SiO2 containing phosphate glasses

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Polarized IR and Raman spectra of Ca2MgSi2O7, Ca2ZnSi2O7 and Sr2MgSi2O7 single crystals: Temperature-dependent studies of commensurate to incommensurate and incommensurate to normal phase transitions

Cited by 46 publications

References 33 publications

Effect of cooling rate on the microstructure and luminescence properties of Sr2MgSi2O7:Eu2+,Dy3+ materials

Effect of cooling rate on the microstructure and luminescence properties of Sr2MgSi2O7:Eu2+,Dy3+ materials

Optical study of annealed cobalt–porous silicon nanocomposites

Thermal properties of MnO2 and SiO2 containing phosphate glasses

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Product

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Effect of cooling rate on the microstructure and luminescence properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ materials

Effect of cooling rate on the microstructure and luminescence properties of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ materials