Ion Irradiation Induced Crystallization In Iron Phosphate Glass – TEM Investigations

Jegadeesan, P.; Amirthapandian, S.; Joseph, Kuruvilla; David, C.; Panigrahi, B. K.; Kutty, K.V. Govindan

doi:10.5185/amlett.2015.5725

Cited by 11 publications

(3 citation statements)

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“…After SHI irradiation, the NPs tend to acquire spherical shape and the particle size increased with fluence as shown in table 1. More importantly, the SAED patterns and HRTEM measurements confirm the formation of monoclinic phase of HfO 2 nano-crystals in NPs is consistent with existing reports of ion-induced crystallization of NPs in general [36][37][38][39]. However, to the best of our knowledge, there are no reports on SHI induced crystallization of HfO 2 NPs.…”

Section: Hrtem and Saed Characterizationsupporting

confidence: 90%

Ion induced crystallization and grain growth of hafnium oxide nano-particles in thin-films deposited by radio frequency magnetron sputtering

Dhanunjaya¹,

Khan²,

Pathak³

et al. 2017

J. Phys. D: Appl. Phys.

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We report on the swift heavy ion (SHI) irradiation induced crystallization and grain growth of HfO2 nanoparticles (NPs) within the HfO2 thin-films deposited by radio frequency (RF) magnetron sputtering technique. As grown films consisted of amorphous clusters of non-spherical HfO2 NPs. These amorphous clusters are transformed to crystalline grains under 100 MeV Ag ion irradiation. These crystallites are found to be spherical in shape and are well dispersed within the films. The average size of these crystallites is found to increase with fluence. Pristine and irradiated films have been characterized by high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), grazing incident x-ray diffraction (GIXRD) and photo luminescence (PL) measurements. The PL measurements suggested the existence of different types of oxygen related defects in pristine and irradiated samples. The observed results on crystallization and grain growth under the influence of SHI are explained within the framework of thermal spike model. The results are expected to provide useful information for understanding the electronic excitation induced crystallization of nanoparticles and can lead to useful applications in electronic and photonic devices.

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Section: Hrtem and Saed Characterizationsupporting

confidence: 90%

Ion induced crystallization and grain growth of hafnium oxide nano-particles in thin-films deposited by radio frequency magnetron sputtering

Dhanunjaya¹,

Khan²,

Pathak³

et al. 2017

J. Phys. D: Appl. Phys.

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“…At higher fluences of 5 × 10 12 ions cm −2 and 1 × 10 13 ions cm −2 reverse effect occurs on the surface due to remelting and several rod-like microstructures are witnessed in random orientation. The formation of grains on the surface is formed by nucleation by a thermally activated process that arises from deformations [47]. The presence of both cubic and rod-shaped microstructures attributes to the multiphase of the glass-ceramics.…”

Section: Fe-semmentioning

confidence: 99%

Structural and optical properties of lithium borate glasses under extreme conditions of ion irradiation

et al. 2023

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Lithium borate (LBO) glasses of the composition 10LiO2.90B2O3 were prepared by melt quenching technique and characterized for morphological, structural, and optical properties before and after the exposure to the extreme conditions of 100 MeV Ni ion irradiation. Both the morphological images and structural properties confirm the transformation of LBO glasses from amorphous to polycrystalline nature. This Ni irradiation provides thermal energy that causes the ceramization of glass. The beam interacts with the material where the top layer of the glass remelts, and ultrafast re-solidification occurs after the termination of the ion beams. The Rietveld refinement using the X-ray diffraction data shows that the irradiated LBO possesses a monoclinic crystal structure of lithium pentaborate pentahydrate (B5H10LiO13). The FTIR spectra of Ni ion irradiated glasses show the creation of non-bridging oxygens (NBO) by the formation of BO4 units at the expense of BO3 units. The direct band gap and the Urbach energy of the glasses are affected by the nickel ion irradiation and are in the range 2.73 to 2.55 eV and 0.59 to 0.42 eV. The refractive index also reveals a minor change (1.66 to 1.63). The molar electronic polarizability, metallization criteria, and transmission coefficient were estimated. The coexistence of crystalline and amorphous phases leads to a multiscale phase structure that has multilevel relaxation processes. This is a suitable condition for the improvement of the rheological properties of glass and glass ceramics. Future work involves optimization of the coexistence of these two phases during irradiation.

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“…The ion track was formed upon irradiation, owing to stress in the matrix, which results in considerable deformation (shear bands). The shear bands led to the formation of nanocrystals (Jegadeesan et al, 2015).…”

Section: Radiation Stability Of Glass Wasteformsmentioning

confidence: 99%

Matrices for radioactive waste immobilization: a review

Pilania,

Dube

2023

Front. Mater.

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Nuclear energy is considered a clean, reliable, and an inexhaustible energy source for power generation. Nuclear power is harnessed from nuclear fission reactions in a dedicated power plant. The by-products (produced in the nuclear power plant) are radioactive and pose a threat to the environment. The safe disposal of nuclear waste is vital to ensure the sustainable use of the nuclear energy. The immobilization of radioactive waste before final disposal is essential for the interim storage and transportation. This review summarizes the recent work on glass, ceramics, and glass–ceramics matrices to immobilize high-level waste. The synthesis methods, leaching behavior, and radiation resistance of matrices are discussed briefly.

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Ion Irradiation Induced Crystallization In Iron Phosphate Glass – TEM Investigations

Cited by 11 publications

References 0 publications

Ion induced crystallization and grain growth of hafnium oxide nano-particles in thin-films deposited by radio frequency magnetron sputtering

Ion induced crystallization and grain growth of hafnium oxide nano-particles in thin-films deposited by radio frequency magnetron sputtering

Structural and optical properties of lithium borate glasses under extreme conditions of ion irradiation

Matrices for radioactive waste immobilization: a review

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