Ca2+-substitution effect on the defect structural changes in the quadruple perovskite series Ca1Cu3Ti4O12 studied by positron annihilation and complementary methods

Barad, Divyesh V.; Mange, Priya L.; Jani, Komal K.; Mukherjee, Smita; Ahmed, Maudud; Kumar, Sudhish; Dolia, S. N.; Pandit, Rabia; Raval, Pooja Y.; Modi, K. B.; Nambissan, P.M.G.

doi:10.1016/j.ceramint.2020.09.110

Cited by 10 publications

(1 citation statement)

References 32 publications

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“…One promising method (as an alternative and addition to traditional ones) for studying the free volume in solids of different structural types is positron annihilation lifetime (PAL) spectroscopy [28,29]. This technique has long been considered for the structural analysis of functional materials such as ceramics [30][31][32], glass [33,34], polymers [35,36], nanocomposites [37,38], etc. Scientific groups that are actively working in this direction have presented different approaches to the analysis of the PAL spectra of ceramic materials and their decomposition into different numbers of components [39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Free Volumes in Polycrystalline BaGa2O4 Ceramics Doped with Eu3+ Ions

et al. 2021

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BaGa2O4 ceramics doped with Eu3+ ions (1, 3 and 4 mol.%) were obtained by solid-phase sintering. The phase composition and microstructural features of ceramics were investigated using X-ray diffraction and scanning electron microscopy in comparison with energy-dispersive methods. Here, it is shown that undoped and Eu3+-doped BaGa2O4 ceramics are characterized by a developed structure of grains, grain boundaries and pores. Additional phases are mainly localized near grain boundaries creating additional defects. The evolution of defect-related extended free volumes in BaGa2O4 ceramics due to the increase in the content of Eu3+ ions was studied using the positron annihilation lifetime spectroscopy technique. It is established that the increase in the number of Eu3+ ions in the basic BaGa2O4 matrix leads to the agglomeration of free-volume defects with their subsequent fragmentation. The presence of Eu3+ ions results in the expansion of nanosized pores and an increase in their number with their future fragmentation.

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Section: Introductionmentioning

confidence: 99%

Evolution of Free Volumes in Polycrystalline BaGa2O4 Ceramics Doped with Eu3+ Ions

et al. 2021

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Extended Positron‐Trapping Defects in the Eu³⁺‐Doped BaGa₂O₄Ceramics Studied by Positron Annihilation Lifetime Method

Klym

Karbovnyk

Luchechko

et al. 2022

Physica Status Solidi (b)

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The BaGa2O4 ceramics doped with Eu3+ ions (1, 3 and 4 mol%) are obtained by solid‐phase sintering. The evolution of defect‐related extended free volumes in the BaGa2O4 ceramics due to the increase of the content of Eu3+ ions has been studied using the positron annihilation lifetime (PAL) spectroscopy technique. It is established that the increase in the number of Eu3+ ions in the basic BaGa2O4 matrix leads to the agglomeration of free‐volume defects with their subsequent fragmentation. The presence of Eu3+ ions results in the expansion of nanosized pores and an increase in their number with their future fragmentation.

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Investigation of Cation and Cation Vacancy Distributions in the Zinc Substituted Maghemite, Prepared by One Pot Room Temperature Co-precipitation Method

Asgarian

Shatooti

Mozaffari

2021

J Supercond Nov Magn

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Ca2+-substitution effect on the defect structural changes in the quadruple perovskite series Ca1Cu3Ti4O12 studied by positron annihilation and complementary methods

Cited by 10 publications

References 32 publications

Evolution of Free Volumes in Polycrystalline BaGa2O4 Ceramics Doped with Eu3+ Ions

Evolution of Free Volumes in Polycrystalline BaGa2O4 Ceramics Doped with Eu3+ Ions

Extended Positron‐Trapping Defects in the Eu³⁺‐Doped BaGa₂O₄Ceramics Studied by Positron Annihilation Lifetime Method

Investigation of Cation and Cation Vacancy Distributions in the Zinc Substituted Maghemite, Prepared by One Pot Room Temperature Co-precipitation Method

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Ca2+-substitution effect on the defect structural changes in the quadruple perovskite series Ca1Cu3Ti4O12 studied by positron annihilation and complementary methods

Cited by 10 publications

References 32 publications

Evolution of Free Volumes in Polycrystalline BaGa2O4 Ceramics Doped with Eu3+ Ions

Evolution of Free Volumes in Polycrystalline BaGa2O4 Ceramics Doped with Eu3+ Ions

Extended Positron‐Trapping Defects in the Eu3+‐Doped BaGa2O4Ceramics Studied by Positron Annihilation Lifetime Method

Investigation of Cation and Cation Vacancy Distributions in the Zinc Substituted Maghemite, Prepared by One Pot Room Temperature Co-precipitation Method

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About

Extended Positron‐Trapping Defects in the Eu³⁺‐Doped BaGa₂O₄Ceramics Studied by Positron Annihilation Lifetime Method