Article
Metallurgy & Metallurgical Engineering
Qiang Feng, Changzhong Liao, Cheng Dong, Kaimin Shih, Minhua Su
Summary: A new ternary Mg1.4Co21.6B6 compound was synthesized and its crystal structure, thermal stability, solid solubility, and physical properties were systematically investigated. The compound showed instability and decomposition into Co3B and Mg at elevated temperatures. The lattice parameters of the compound were significantly affected by Ni substitution, but no regular trend was observed. The electrical and magnetic performances of the samples indicated typical ferromagnetic properties.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Review
Metallurgy & Metallurgical Engineering
Qiang Feng, Changzhong Liao, Cheng Dong, Kaimin Shih, Minhua Su
Summary: A new ternary Mg1.4Co21.6B6 compound was synthesized and investigated, showing that Ni-substitution affects its solid solubility and physical properties. The crystal structure was determined and it crystallizes in the C6Cr23 structure type. When sintered at high temperatures, it decomposes into Co3B and Mg.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Chemistry, Inorganic & Nuclear
Pratik Das, Bal Govind Vats, Manoj Mohapatra, Abhishek Kumar Rai, Pradeep Samui, Muhammed Shafeeq, S. C. Parida
Summary: In this study, a series of solid solutions with compositions of Ca10-xSrx(PO4)6F2 (x = 2, 4, 6, and 8) were synthesized and their structural properties were analyzed by XRD, FTIR, and Raman spectroscopy. The results showed that the average strain values in the calcium-rich compositions were higher than those in the strontium-rich compositions. Thermo-physical properties such as heat capacity and thermal expansion were experimentally measured. Electron beam irradiation studies demonstrated the resistance of the substituted solutions to phase degradation. Combined FTIR, Raman, and EPR studies revealed the detrimental effect of higher strontium content on fluorapatite through surface modification. This study provides insights into the design of better matrices for 90Sr loading capacity and stability.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Physical
Neeraj Kadian, Renu Kumari, Ankit Panchal, Jasvir Dalal, Diwakar Padalia
Summary: Doped ferrite materials, such as Gadolinium-doped magnetite samples, have enhanced magnetic properties, higher Curie temperature, biocompatibility, and potential energy applications. In this study, the effects of doping on the structural and optical properties of Fe3O4 are investigated. The results show that doping increases crystalline size and cell volume, while reducing micro-strain, indicating the potential use of these synthesized nanoparticles for photocatalytic applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Ao Zhang, Huiqing Fan, Dingwei Hou, Xin Meng, Weijia Wang
Summary: CSTANx microwave dielectric ceramics were synthesized through solid-state reaction, and the effects of (Al0.5Nb0.5)4+ co-doping on the microstructure and dielectric behavior were investigated. The results show that (Al0.5Nb0.5)4+ doping enhanced the ordering at B-site and reduced the dielectric loss, resulting in improved temperature stability of relative permittivity and resonant frequency.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Lingfang Zou, Zhuan Li, Zonglong Gao, Fu Chen, Wenjie Li, Yong Yu, Yimin Li, Peng Xiao
Summary: This study investigates the impact of Pr3+ doping on the ferroelectric properties of PZT ceramics, showing that it can improve piezoelectric activity and optimize performance stability. Introducing Pr3+ leads to a dense and fine microstructure, with an ideal coexistence of rhombohedral and tetragonal phases observed in the PPZT4 samples.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Ompal Singh, Arun Kumar, Kaushal Kumar, Ashish Agarwal, Sujata Sanghi
Summary: The structural stability and magnetic properties of Pr doped BiFeO3 multiferroic ceramics depend on the sintering time, with observed phase transformations and increased magnetization with longer sintering times. The enhancement in magnetization is suggested to be caused by the increase in canting angle while crossing over from polar rhombohedral to antipolar orthorhombic symmetry.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Ceramics
Ritesh Verma, Ankush Chauhan, Khalid Mujasam Batoo, Rajesh Kumar, Muhammad Hadi, Emad H. Raslan
Summary: Sr2+ doped Ba0.9-xCa0.1SrxTi0.8Zr0.2O3 nano-ceramics were synthesized by the conventional solid-state reaction method. XRD analysis confirmed the formation of a single-phase orthorhombic ABO3 structure, with increased crystallite size and decreased lattice parameter, dislocation density, and apparent density with doping. Porosity increased with doping, and various spectroscopy techniques revealed structural and compositional changes in the materials.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Manish Kumar, Arvind Kumar, Abhishek Singh, Avneesh Anshul, Subhash Sharma, Prakash Chandra Sati
Summary: This study investigated the structural and low temperature magnetic properties of CoFe2-xMoxO4 materials with different Mo doping levels. The results showed that lattice parameters decrease with Mo doping, leading to enhanced magnetic parameters and reduced micro-strain. Computational calculations based on density functional theory were consistent with experimental findings, validating the conclusions drawn from the study.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Naresh Degda, Nimesh Patel, Vishwnath Verma, K. V. R. Murthy, Naveen Chauhan, Malika Singhal, M. Srinivas
Summary: A series of luminescent orange-red emitting Sr2YVO6:Eu3+ double perovskite phosphors were prepared through traditional high-temperature combustion synthesis, and their luminescence properties were examined. The monoclinic crystal structure of all prepared Sr2YVO6: Eu3+ phosphors was confirmed through X-ray diffraction (XRD) and Rietveld analysis. The phosphors exhibited strong red photoluminescence (PL) emission bands at different wavelengths under specific excitation, indicating the presence of far-red luminescence emission.
Article
Chemistry, Physical
Yaoyao Han, Wenfei Liang, Xuyang Lin, Yulu Li, Fengke Sun, Fan Zhang, Peter C. Sercel, Kaifeng Wu
Summary: The study reports strong bright-exciton fine-structure splitting in solution-processed CsPbI3 perovskite quantum dots, which is robust to quantum dot size and shape heterogeneity and increases with decreasing temperature. The splitting is found to be associated with orthorhombic distortion of the perovskite lattice.
Article
Chemistry, Multidisciplinary
M. Riju Khandaker, Yuki Maruyama, Masanori Nagao, Satoshi Watauchi, Hirokazu Munakata, Kiyoshi Kanamura, Isao Tanaka
Summary: Investigation on the growth of LiCO1-xMgxO2 single crystals using the TSFZ technique resulted in inclusion-free crystals obtained from 1.0% Mg-doped feeds, with the Mg concentration in the LiCoO2 phase determined to be 0.87%. The room temperature ionic conductivities of LiCo0.9913Mg0.0087O2 single crystals were significantly higher along the [100] direction compared to [001], indicating high anisotropy of about 6545.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Aanchal Chawla, Anupinder Singh, P. D. Babu, Mandeep Singh
Summary: Ba(0.96)Ca(0.04)Ti(1-3x/4)Fe(x)O(3) (0.06 <= x <= 0.15) samples were synthesized using solid state reaction technique, exhibiting ferroelectric and magnetic behavior. The XRD and FESEM data confirmed the structural characteristics and grain size variation, with the sample at x = 0.12 showing the best performance in terms of ferroelectric and magnetic properties. Multiple magnetic transitions were observed in high temperature data.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Analytical
Naresh Degda, Nimesh Patel, Vishwnath Verma, Mangalampalli Srinivas, Kota Venkata Ramana Murthy, Divi Haranath
Summary: A luminescent double perovskite phosphor Sr2YNbO6 doped with Eu3+ was successfully synthesized via a high-temperature combustion method and exhibited a monoclinic phase. The crystal structure, phase purity, and surface morphology were analyzed using X-ray diffraction and scanning electron microscopy. The functional groups in the phosphor were studied using Fourier transform infrared spectra analysis. The luminescence properties of the phosphor, including photoluminescence and thermoluminescence, were investigated and the dominant emission was attributed to the hypersensitive D-5(0)-F-7(2) electric dipole transition of Eu3+.
Article
Materials Science, Multidisciplinary
Dharmendra Yadav, Gurudeo Nirala, Sushma Yadav, Upendra Kumar, Shail Upadhyay, Satyam Kumar
Summary: Samples of the system SrCe1-xGdxO3 (x = 0.0, 0.02, 0.04, 0.06, and 0.10) were prepared and investigated for their structure, properties, and conductivity, showing potential as mixed ionic and electronic conductors for SOFCs. The incorporation of Gd into the lattice reduced the optical bandgap and grain size, with the highest conductivity observed for SrCe0.98Gd0.02O3 at 600 degrees C. XPS spectra confirmed the presence of Ce in different states and oxygen vacancies, which were further analyzed using Raman spectroscopy.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)