Blue emission properties of Eu-doped CaAl2O4 phosphors synthesized by a flux method

Park, Yun Jin; Kim, Young Jin

doi:10.1016/j.mseb.2007.07.048

Cited by 36 publications

(3 citation statements)

References 20 publications

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“…In addition, tests in nitrogen were applied, starting from a silicone/nano-fillers system, with the possibility of modifying the emission characteristics, according to reduction reactions, in turn promoted by the conversion of MK polymer into SiCO instead of pure silica. As shown by Figure 7a , gehlenite remained the main crystal phase, but some CaAl 2 O 4 formed; while gehlenite could keep Eu 3+ ions, the secondary phase is known to embed Eu 2+ ions [ 142 ], made available by the presence of carbon in the ceramic residue of the polymer (Eu 2 O 3 + C → 2 EuO + CO↑), leading to the blue emission (centered at 440–450 nm) in the spectra of Figure 7b .…”

Section: Products and Selected Case Studiesmentioning

confidence: 99%

Advanced Ceramics from Preceramic Polymers Modified at the Nano-Scale: A Review

et al. 2014

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Preceramic polymers, i.e., polymers that are converted into ceramics upon heat treatment, have been successfully used for almost 40 years to give advanced ceramics, especially belonging to the ternary SiCO and SiCN systems or to the quaternary SiBCN system. One of their main advantages is the possibility of combining the shaping and synthesis of ceramics: components can be shaped at the precursor stage by conventional plastic-forming techniques, such as spinning, blowing, injection molding, warm pressing and resin transfer molding, and then converted into ceramics by treatments typically above 800 °C. The extension of the approach to a wider range of ceramic compositions and applications, both structural and thermo-structural (refractory components, thermal barrier coatings) or functional (bioactive ceramics, luminescent materials), mainly relies on modifications of the polymers at the nano-scale, i.e., on the introduction of nano-sized fillers and/or chemical additives, leading to nano-structured ceramic components upon thermal conversion. Fillers and additives may react with the main ceramic residue of the polymer, leading to ceramics of significant engineering interest (such as silicates and SiAlONs), or cause the formation of secondary phases, significantly affecting the functionalities of the polymer-derived matrix.

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Section: Products and Selected Case Studiesmentioning

confidence: 99%

Advanced Ceramics from Preceramic Polymers Modified at the Nano-Scale: A Review

et al. 2014

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“…However, besides high reaction temperature, long time for pestle samples is necessary in SSR. Even so, the high chemical uniformity is not guaranteed [25][26][27][28][29]. In order to overcome the drawbacks of the conventional SSR method, flux has been introduced to the reaction system to accelerate the reaction kinetics by enhancing diffusion coefficients.…”

Section: Introductionmentioning

confidence: 99%

MgAl2O4:Mn2+ Red-Emitting Phosphor: Influence of MgF2 Flux on the Microstructure and Luminescence Properties

Zhao

et al. 2017

J. Compos. Biodegradable Polym.

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A serial of Mn ions doped MgAl2O4 phosphors, exhibiting only red light centred at 650 nm, have been prepared by a solid state reaction (SSR) with and without MgF2 flux. These phosphors have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electron paramagnetic resonance (EPR) measurements. EPR result demonstrates that Mn ions exist as +2 valence. The emission intensity of the phosphors varies with Mn2+ concentration. The addition of MgF2 flux to the reactants enhances the luminescence properties through elevating the crystallinity, regulating the morphology and particle size of the MgAl2O4:Mn2+ phosphor. The phosphor MgAl2O4:0.10%Mn2+ with 12 wt% MgF2 flux shows the best emission performance.

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“…Accordingly the structure of the host crystal contributes to the variation of the emission wavelength. For example, Eu 2+ ions doped CaAl 2 O 4 (CA) and SrAl 2 O 4 (SA) exhibit a blue and a green emission, respectively (1)(2)(3).…”

Section: Introductionmentioning

confidence: 99%

Luminescent Properties of M-Al2O4:Eu2+ (M: Ca, Sr) Thin Films Prepared on Sapphire Substrates

Lee

Kim

2009

ECS Trans.

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O 4 :Eu 2+ (M: Ca, Sr) thin films were deposited on c-plane sapphire substrates by rf magnetron sputtering, and growing behaviors and luminescent properties were investigated. Asdeposited films were amorphous-like, but they were transformed to the epitaxial films by annealing at high temperatures. The epitaxial orientations and growing behaviors of CaAl 2 O 4 and SrAl 2 O 4 films were different each other due to the crystallographic distinction. PL spectra exhibited a blue and a green emission for CaAl 2 O 4 :Eu 2+ and SrAl 2 O 4 :Eu 2+ , respectively.

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Blue emission properties of Eu-doped CaAl2O4 phosphors synthesized by a flux method

Cited by 36 publications

References 20 publications

Advanced Ceramics from Preceramic Polymers Modified at the Nano-Scale: A Review

Advanced Ceramics from Preceramic Polymers Modified at the Nano-Scale: A Review

MgAl2O4:Mn2+ Red-Emitting Phosphor: Influence of MgF2 Flux on the Microstructure and Luminescence Properties

Luminescent Properties of M-Al2O4:Eu2+ (M: Ca, Sr) Thin Films Prepared on Sapphire Substrates

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