Structural properties of melt versus sol-gel derived yttrium aluminosilicate systems

Eniu, D.; Simon, S.

doi:10.1016/j.ceramint.2018.02.181

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…Moreover, when the nanocrystals are very small, it is difficult to observe the relevant diffraction peaks masked by the strong amorphous band of the fiber cladding silica glass. In contrast, when NCF4 was heat-treated at 1300 °C, several characteristic diffraction peaks appeared, which were in agreement with the standard YPS crystal peaks of the monoclinic phase of Y 2 Si 2 O 7 (JCPDS #38-0440). − Based on Scherrer’s formula, the estimated average size of YPS nanocrystals was approximately 40.8 nm, as shown in Figure S4. The crystallinity of NCF4 is estimated to be approximately 29%, which shows a relatively high crystallinity.…”

Section: Resultssupporting

confidence: 70%

Flexible Scintillation Silica Fiber with Engineered Nanocrystals for Remote Real-Time X-ray Detection

Jia

Wen

Pan

et al. 2021

ACS Appl. Mater. Interfaces

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Scintillation fibers based on rare-earth ion-doped crystal materials have attracted significant attention for applications in a wide range of areas from security to healthcare. However, the scintillation performance of crystal fibers is severely limited owing to the complex preparation process. Here, we report a modified preparation process of the transparent Ce/Tb co-doped yttrium pyrosilicate (YPS) nanocrystal silica fiber for the first time, which was fabricated by the CO2 laser-heated method assisted with optimal thermal annealing. An YPS nanocrystal phase with an average size of approximately 38 nm is obtained by controlling the diffusion concentration of SiO2 in the fiber core region. Both Ce3+ and Tb3+ ions were successfully embedded into YPS nanocrystals, which enhanced the energy transfer with an efficiency of 59.87% between the dopants as well as brighter green light emission. Furthermore, the X-ray-excited remote radioluminescence response of the obtained YPS nanocrystal fiber with a length of 20 m was approximately 1 order of magnitude larger than that of the precursor fiber, while the dose rate response exhibited excellent linearity. It is believed that the novel transparent YPS nanocrystal-doped silica optical fibers, combined with their excellent fluorescent properties, could be promising candidates for scintillators, fiber lasers, and phosphors.

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Section: Resultssupporting

confidence: 70%

Flexible Scintillation Silica Fiber with Engineered Nanocrystals for Remote Real-Time X-ray Detection

Jia

Wen

Pan

et al. 2021

ACS Appl. Mater. Interfaces

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“…However, poor chemical durability and high solubility can limit their utility. Several authors have explored the role of yttrium oxide within silicate glass systems [33,34,[60][61][62][63] and reported that it can act as a network former or modifier depending on the amount of Y 2 O 3 present. However, detailed experimental structural analysis and physiochemical studies have not been conducted for yttrium doped phosphate-based glasses.…”

Section: Discussionmentioning

confidence: 99%

Yttrium doped phosphate-based glasses: structural and degradation analyses

et al. 2020

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This study investigates the role of yttrium in phosphate-based glasses in the system 45(P2O5)–25(CaO)– (30-x)(Na2O)–x(Y2O3) (0≤x≤5) prepared via melt quenching and focuses on their structural characterisation and degradation properties. The structural analyses were performed using a combination of solid-state nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). 31P NMR analysis showed that depolymerisation of the phosphate network occurred which increased with Y2O3 content as metaphosphate units (Q2) decreased with subsequent increase in pyrophosphate species (Q1). The NMR results correlated well with structural changes observed via FTIR and XPS analyses. XRD analysis of crystallised glass samples revealed the presence of calcium pyrophosphate (Ca2P2O7) and sodium metaphosphate (NaPO3) phases for all the glass formulations explored. Yttrium-containing phases were found for the formulations containing 3 and 5 mol% Y2O3. Degradation analyses performed in Phosphate buffer saline (PBS) and Milli-Q water revealed significantly reduced rates with addition of Y2O3 content. This decrease was attributed to the formation of Y-O-P bonds where the octahedral structure of yttrium (YO6) cross-linked phosphate chains, subsequently leading to an increase in chemical durability of the glasses. The ion release studies also showed good correlation with the degradation profiles.

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“…The FT-IR spectra of the parent glasses in the wavenumber range of 400-1400 cm -1 , 400-650 cm -1 and 850-1350 cm -1 are showed in Fig. 7 (a) [5,27,28]. Besides, the spectral range of 500-600 cm -1 is expected to be assigned to Y-O stretching vibration [27].…”

Section: Structure Analysismentioning

confidence: 97%

Crystallization behavior and IR structure of yttrium aluminosilicate glasses

Zheng

Liu

et al. 2020

Journal of the European Ceramic Society

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The crystallization of four Y 2 O 3-Al 2 O 3-SiO 2 (YAS) glasses were investigated to prepare YAS glass ceramics precipitated singly/mainly Y 2 Si 2 O 7 or Y 4.67 (SiO 4) 3 O apatite, and to explore the crystallization difference between the stoichiometric parent glass (SPG) and non-stoichiometric parent glass (NSPG). The DSC results revealed that glass locating at the higher liquidus surface temperature has lower crystallization peak temperature, which indicating that the corresponding glass has higher crystallization potential to crystallize easily. Crystallization of the NSPG samples is along surface and caused by phase separation, while SPG sample is the surface crystallization at the first *Manuscript Click here to view linked References 2 exothermic peak temperature and overall crystallization at the second exothermic peak temperature. Glass ceramics only containing y-Y 2 Si 2 O 7 or Y 4.67 (SiO 4) 3 O apatite are obtained successfully, and which are illustrated by fitting FTIR spectra. These results can provide technical guide for controlling the crystallization process and the types of precipitated crystals in YAS glass for different application potentials.

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Structural properties of melt versus sol-gel derived yttrium aluminosilicate systems

Cited by 6 publications

References 30 publications

Flexible Scintillation Silica Fiber with Engineered Nanocrystals for Remote Real-Time X-ray Detection

Flexible Scintillation Silica Fiber with Engineered Nanocrystals for Remote Real-Time X-ray Detection

Yttrium doped phosphate-based glasses: structural and degradation analyses

Crystallization behavior and IR structure of yttrium aluminosilicate glasses

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