Investigation of dielectric, mechanical, and electrical properties of flame synthesized Y2/3Cu2.90Zn0.10Ti4O12 material

Singh, Laxman; Sheeraz, Muhammad; Chowdhury, Mahmudun Nabi; S., U.; Yadava, Shiva Sunder; Park, Young Seok; Singh, Shalendra; Lee, Youngil

doi:10.1007/s10854-018-9052-x

Cited by 6 publications

(2 citation statements)

References 39 publications

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“…For the dopant as Ti in LiFePO 4 inFig. 10e, the XPS peaks of Ti 2P are located at 458.4 and 464.3 eV for Ti 2p 3/2 and Ti 2p 1/2 , respectively, which a rm the oxidation state of Ti ions is + 4 in good consistency with oxidation state of Ti[19,20].…”

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confidence: 67%

Citric Acid-Assisted Inexpensive Semi-Wet Combustion Synthesis and Characterization of Ultrafine LiFe0.95Ti0.05PO4 and LiFePO4 Polycrystalline Materials

Lee

Singh

Mahato

et al. 2020

Preprint

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A solution based economically low cost, eco-friendly and energetically advantageous alternative route for the fabrication of ultrafine LiFe0.95Ti0.05PO4 and LiFePO4, polycrystalline material by semi-wet combustion and sol-gel synthesis is presented. The thermal analysis, crystal structure, morphology and composition of the materials were investigated using different physio-chemical characterizations. TG/DTA, X-ray diffraction, TEM, SEM, EDX, and XPS. The route required auto-combustion of an aqueous metal nitrate solutions in air with the aid of citric acid and is efficient for the fabrication of high quality, LiFe0.95Ti0.05PO4 and LiFePO4 at low temperature, in the combustion residue itself. On a micro-structural studies the grain size was seen in submicron-size that was acquired in a long-established sol-gel combustion and succeeding calcination method. Consequently, the present method reported can yield the ultrafine LiFePO4 and LiFe0.95Ti0.05PO4 at moderate temperature and is look forward to be applicable for other iso-structural polycrystalline materials.

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confidence: 67%

Citric Acid-Assisted Inexpensive Semi-Wet Combustion Synthesis and Characterization of Ultrafine LiFe0.95Ti0.05PO4 and LiFePO4 Polycrystalline Materials

Lee

Singh

Mahato

et al. 2020

Preprint

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“…The rapid development of wireless communication with the broadband network has significantly increased the demand for microwave dielectric ceramics of excellent dielectric behaviors (e.g., suitable relative permittivity, high quality factor, and low-temperature drift of resonance frequency [1][2][3]) together with high J u s t A c c e p t e d mechanical properties (e.g., elastic modulus, hardness, and fracture toughness [4][5][6][7]), since excellent mechanical properties (e.g., high cracking resistance [8][9][10][11] and penetration resistance [12,13]) can ensure high structural stability, high reliability and long-term service life of dielectric ceramics, and have drawn extensive attention in the field of dielectric ceramics [4][5][6]14]. Values of Meyer and Knoop hardness of dielectric ceramic (Ba0.9Ca0.1)0.9(Na0.5Bi0.5)0.1TiO3 were found to be almost the same, and both increased with increasing sintering temperature [15].…”

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confidence: 99%

Micromechanical characterization of microwave dielectric ceramic BaO–Sm ₂O ₃–5TiO ₂ by indentation and scratch methods

Liu¹,

Xu²

2023

Journal of Advanced Ceramics

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Mechanical characterization of dielectric ceramics, which have drawn extensive attention in wireless communication, remains challenging. Micromechanical properties with microstructures of dielectric ceramic BaO-Sm2O3-5TiO2 (BST) were assessed by nanoindentation, microhardness, and microscratch tests under different indenters, along with X-ray diffraction, scanning electron microscopy, and Raman spectroscopy. Accurate determination of elastic modulus (i.e., 260 GPa) and indentation hardness (i.e., J u s t A c c e p t e d 16.2 GPa) of brittle BST ceramic by instrumented indentation technique requires low loads with little indentation-induced damage. Elastic modulus and indentation hardness were analyzed by different methodologies such as energybased and displacement-based approaches, and elastic recovery of Knoop imprint. Consistent values (about 3.1 MPa·m 1/2 ) of fracture toughness of BST ceramic were obtained by different methods such as Vickers indenter-induced cracking method, energy-based nanoindentation approaches, and linear elastic fracture mechanics-based scratch approach with a spherical indenter, demonstrating successful applications of indentation and scratch methods in characterizing fracture properties of brittle solids. The deterioration of elastic modulus or indentation hardness with the increase in indentation load is caused by indentation-induced damage, and can be used to determine fracture toughness of material by energy-based nanoindentation approaches, and the critical void volume fraction is 0.27 (or 0.18) if elastic modulus (or indentation hardness) of the brittle BST ceramic is used. The fracture work at the critical load corresponding to the initial decrease in elastic modulus or indentation hardness can also be used to assess fracture toughness of brittle solids, opening new venues of application of nanoindentation test as a means to characterize fracture toughness of brittle ceramics.

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Studies of microstructural, dielectric, and impedance spectroscopic properties of Bi0.617Y0.05Cu3Ti4O12 ceramic synthesized through semi-wet route

Prajapati

Shankar

Pandey

et al. 2021

J Mater Sci: Mater Electron

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Investigation of dielectric, mechanical, and electrical properties of flame synthesized Y2/3Cu2.90Zn0.10Ti4O12 material

Cited by 6 publications

References 39 publications

Citric Acid-Assisted Inexpensive Semi-Wet Combustion Synthesis and Characterization of Ultrafine LiFe0.95Ti0.05PO4 and LiFePO4 Polycrystalline Materials

Citric Acid-Assisted Inexpensive Semi-Wet Combustion Synthesis and Characterization of Ultrafine LiFe0.95Ti0.05PO4 and LiFePO4 Polycrystalline Materials

Micromechanical characterization of microwave dielectric ceramic BaO–Sm ₂O ₃–5TiO ₂ by indentation and scratch methods

Studies of microstructural, dielectric, and impedance spectroscopic properties of Bi0.617Y0.05Cu3Ti4O12 ceramic synthesized through semi-wet route

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Investigation of dielectric, mechanical, and electrical properties of flame synthesized Y2/3Cu2.90Zn0.10Ti4O12 material

Cited by 6 publications

References 39 publications

Citric Acid-Assisted Inexpensive Semi-Wet Combustion Synthesis and Characterization of Ultrafine LiFe0.95Ti0.05PO4 and LiFePO4 Polycrystalline Materials

Citric Acid-Assisted Inexpensive Semi-Wet Combustion Synthesis and Characterization of Ultrafine LiFe0.95Ti0.05PO4 and LiFePO4 Polycrystalline Materials

Micromechanical characterization of microwave dielectric ceramic BaO–Sm 2O 3–5TiO 2 by indentation and scratch methods

Studies of microstructural, dielectric, and impedance spectroscopic properties of Bi0.617Y0.05Cu3Ti4O12 ceramic synthesized through semi-wet route

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Micromechanical characterization of microwave dielectric ceramic BaO–Sm ₂O ₃–5TiO ₂ by indentation and scratch methods