Pressure -induced changes in the persistent luminescence of Gd2.994Ce0.006Ga3Al2O12 and Gd2.964Ce0.006Dy0.03Ga3Al2O12 nanoceramics

Głuchowski, Paweł

doi:10.1039/d2dt00130f

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…In the manganites, a decrease in the crystallite size leads to a reduction in the magnetization [41] by a disruption of the long-range ferromagnetic interactions occurring in volume and especially in the surface layer of the crystallites. The decrease in the crystallite size was observed already by us [42,43], and is related to the decomposition of the surface layer of the nanocrystallite and decrease in the size of the core. Additionally, it can be observed that for the ceramics at high diffraction angles, the background strongly increases, this may be potentially related to the reflection mode of measurement made on non-parallel surfaces of the small pieces of the ceramics.…”

Section: Structure and Morphologymentioning

confidence: 56%

Controlling the Magnetic Properties of La0.9A0.1Mn0.9Cr0.1O3 (A: Li, K, Na) Powders and Ceramics by Alkali Ions Doping

Głuchowski

Nikonkov²,

Kujawa³

et al. 2023

Magnetochemistry

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Nanocrystalline La0.9A0.1Mn0.9Cr0.1O3 (A: Li, K, Na) powders have been synthesized by combustion method. The powders were used to prepare ceramics by high-pressure low-temperature sintering technique. For all samples the structure, elemental composition and morphology were studied using X-ray diffraction (XRD), Raman spectroscopy, Energy-Dispersive X-ray Spectroscopy (EDS) and Scanning electron microscopy (SEM). Magnetic properties were studied using magnetometry methods and the valency changes of the cations after alkali ions doping were studied using X-ray photoelectron spectroscopy (XPS). The influence of the sintering pressure on the structural and magnetic properties of the manganites doped with different alkali ions and chromium was also investigated. Magnetization properties were studied as a function of sintering pressure and type of the dopant. Chemical doping with alkali ions as well as external pressure significantly changed the magnetic properties of the compounds. It was found that the magnetic properties of the manganites could be predictably modified through the use of a suitable dopant element.

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Section: Structure and Morphologymentioning

confidence: 56%

Controlling the Magnetic Properties of La0.9A0.1Mn0.9Cr0.1O3 (A: Li, K, Na) Powders and Ceramics by Alkali Ions Doping

Głuchowski

Nikonkov²,

Kujawa³

et al. 2023

Magnetochemistry

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“…These properties are critical for efficient light collection and detection. The synthesis conditions can affect the wavelength of emitted light, which in turn affects the choice of photodetectors used to capture the scintillation signals [7,[12][13][14][15]. The synthesis process can influence the mechanical integrity and stability of the scintillator material.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of cerium-doped gadolinium gallium aluminum garnet (GGAG:Ce) scintillating powder via solvothermal method

Oad,

Pandya,

Rawat

et al. 2024

Phys. Scr.

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The powder material Gd3Ga3Al2O12:Ce (GGAG doped with Cerium) has garnered significant attention in radiation detection due to its high light yield and rapid decay time. Despite its potential, the synthesis of high-quality and reproducible GGAG:Ce scintillating powder remains a considerable challenge. In this study, we present a solvothermal approach with an annealing temperature of 1300 °C for producing cerium-doped GGAG powder with varying concentrations (4, 2, and 0.5 mol%). The structural and luminescent characteristics were meticulously examined using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), photoluminescence (PL), radioluminescence (RL) spectroscopy, and X-ray photoelectron spectroscopy (XPS). XRD analysis confirmed the single-cubic phase garnet structure of the synthesized powder. By comparing the intermediate solvothermal products synthesized at different sintering temperatures (900 °C for 3 hours and 1300 °C for 1 and 3 hours), a direct correlation between solvothermal conditions and the structure/property relationships of the product was established. FESEM images revealed an ellipsoidal to irregular morphology of the as-synthesized GGAG:Ce microparticles, ranging from 0.1 to 0.3 µm, regardless of the Ce concentration. PL spectra demonstrated a strong emission peak at approximately 550 nm, characteristic of Ce3+ ions. RL data confirmed the peak luminescence at around 550 nm, with an almost twofold increase in intensity as the concentration of Ce3+ increased from 0.5 mol% to 4 mol%. XPS data disclosed the Ce3+/Ce4+ ratio in solvothermally synthesized GGAG:Ce, wherein Ce loading of 4 mol% demonstrated the increase in Ce3+ concentration to 95%, whereas the concentration of Ce4+ decreased to 5%. Notably, the highest luminescence efficiency was achieved with GGAG:Ce at a 4 mol% concentration. Thus, the solvothermal method employed in GGAG:Ce synthesis presents a straightforward approach, yielding rapid results with precise control over particle morphology and size.

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Pressure modified upconversion luminescence of Yb3+ and Er3+-doped Bi3TeBO9 ceramics

Zhezhera,

Gluchowski,

Nowicki

et al. 2024

Journal of Luminescence

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Pressure -induced changes in the persistent luminescence of Gd_2.994Ce_0.006Ga₃Al₂O₁₂ and Gd_2.964Ce_0.006Dy_0.03Ga₃Al₂O₁₂ nanoceramics

Abstract: Pressure applied during sintering of the nanoceramics may enhance persistent luminescence.

Cited by 3 publications

References 43 publications

Controlling the Magnetic Properties of La0.9A0.1Mn0.9Cr0.1O3 (A: Li, K, Na) Powders and Ceramics by Alkali Ions Doping

Controlling the Magnetic Properties of La0.9A0.1Mn0.9Cr0.1O3 (A: Li, K, Na) Powders and Ceramics by Alkali Ions Doping

Synthesis of cerium-doped gadolinium gallium aluminum garnet (GGAG:Ce) scintillating powder via solvothermal method

Pressure modified upconversion luminescence of Yb3+ and Er3+-doped Bi3TeBO9 ceramics

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