Laser sintering and radioluminescence emission of pure and doped Y 2 O 3 ceramics

Oliveira, Tiago Cordeiro de; Silva, Marcelo Souza da; Jesus, L.M.; Sampaio, D.V.; Santos, J.C.A.; Souza, Natalilian Roberta da Silva; Silva, Ronaldo S.

doi:10.1016/j.ceramint.2014.07.056

Cited by 31 publications

(7 citation statements)

References 18 publications

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“…Furthermore, Ji et al showed that after laser irradiation, a two-fold enhancement in the dielectric permittivity ′ was reached for Ta 2 O 5 ceramics due to the stabilization of a high-temperature phase at room temperature (RT) and the crystallographic orientation of the ceramics [11]. Moreover, in our previous paper, we achieved dense and nanostructured BaTiO 3 and Y 2 O 3 ceramics using a laser sintering technique [12,13]. The main advantages of this method are the rapid processing, the potential for using high heating and cooling rates (about 2000 °C/min) without crucibles, thereby reducing the risk of contamination, and the potential for sintering materials with high melting points.…”

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confidence: 90%

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Radioluminescence emission of YAG:RE laser-sintered ceramics

et al. 2015

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confidence: 90%

“…Recently, laser sintering has received much attention because of its potential application in the sintering of ceramics oxides [8][9][10][11][12][13]. In Bi 4 Ge 3 O 12 ceramics production, the laser sintering process has improved both the transparency and scintillator properties [9,10].…”

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confidence: 99%

Radioluminescence emission of YAG:RE laser-sintered ceramics

et al. 2015

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“…The optical properties of a cubic Y 2 O 3 host in various modifications (bulk crystal, transparent ceramic, nanoparticles) have recently been studied in sufficient detail (e.g., see Refs. [ 9 , 10 , 11 , 12 ]). It has been found for bulk crystalline Y 2 O 3 that the intrinsic luminescence of such a host matrix is associated with excitons and optically active defects.…”

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confidence: 99%

Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y2O3 Films Prepared by Reactive Magnetron Sputtering

et al. 2022

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This paper presents a comprehensive study of the energy structure, optical characteristics, and spectral-kinetic parameters of elementary excitations in a high-purity nanocrystalline cubic Y2O3 film synthesized by reactive magnetron sputtering. The optical transparency gaps for direct and indirect interband transitions were determined and discussed. The dispersion of the refractive index was established based on the analysis of interference effects. It was found that the refractive index of the Y2O3 film synthesized in this study is higher in order of magnitude than that of the films obtained with the help of other technologies. The intrinsic emission of Y2O3 film has been discussed and associated with the triplet–singlet radiative relaxation of self-trapped and bound excitons. We also studied the temperature behavior of the exciton luminescence of Y2O3 for the first time and determined thermal activation barriers. The optical energy and kinetic parameters of cubic Y2O3 films were analyzed in comparison with those of the monoclinic films of yttrium oxide. The main difference between the optical properties of cubic and monoclinic Y2O3 films was established, which allowed for a supposition of their application prospects.

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“…Hence, recently, laser sintering technology has been explored as a less-employed but promising methodology for the sintering of various ceramics. 5 The methodology presents rapid processing and high heating∖cooling rate 7,8 Using a CO 2 laser as the main heating source can also reduce the processing parameters in laser sintering. Laser heat treatment provides a simple and rapid fabricating method to produce ZrO 2 thin film by laser sintering, 9 and dense ceramic film can be obtained.…”

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confidence: 99%

Laser sintering of Al₂O₃‐based green ceramics prepared by different pre‐sintering temperatures

Liu

Wang

Zhang

2022

Int J Applied Ceramic Tech

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Al2O3‐based green ceramics are prepared by isostatic cold pressing technology. The prepared green ceramics are pre‐sintered at the temperature from room temperature to 1100°C, and then Al2O3 ceramics are prepared by laser sintering. The effects of pre‐sintering temperatures and laser parameters on mechanical properties and the sintering quality are analyzed. The results show that good crystallinity of Al2O3 particles is obtained at a higher pre‐sintering temperature. The flexural strength and density of green ceramics increase with the temperature of heat treatment. The flexural strength decreases slightly at ∼200°C due to the paraffin binder disintegration. The pre‐sintering temperature and laser processing parameters have a significant influence on the sintering quality. With the increase of laser power and laser frequency, dynamic grain growth occurs, and then grains are refined. The majority of plate‐like grains are transformed into long cylindrical‐like grains in the severe densification process. However, porous flocculation microstructures are generated on the samples pre‐sintered at 1100°C after laser sintering, which is due to the material gasification in atmospheric environment during sintering by infrared laser. More uniform microstructure and better sintering quality of samples pre‐sintered at 500°C can be achieved after laser sintering with a relatively narrower grain size distribution.

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Laser sintering and radioluminescence emission of pure and doped Y 2 O 3 ceramics

Cited by 31 publications

References 18 publications

Radioluminescence emission of YAG:RE laser-sintered ceramics

Radioluminescence emission of YAG:RE laser-sintered ceramics

Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y2O3 Films Prepared by Reactive Magnetron Sputtering

Laser sintering of Al₂O₃‐based green ceramics prepared by different pre‐sintering temperatures

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Laser sintering and radioluminescence emission of pure and doped Y 2 O 3 ceramics

Cited by 31 publications

References 18 publications

Radioluminescence emission of YAG:RE laser-sintered ceramics

Radioluminescence emission of YAG:RE laser-sintered ceramics

Exciton Luminescence and Optical Properties of Nanocrystalline Cubic Y2O3 Films Prepared by Reactive Magnetron Sputtering

Laser sintering of Al2O3‐based green ceramics prepared by different pre‐sintering temperatures

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Laser sintering of Al₂O₃‐based green ceramics prepared by different pre‐sintering temperatures