Article
Materials Science, Ceramics
Victor I. Hernandez, Domingo I. Garcia-Gutierrez, Juan A. Aguilar-Garib, Roman J. Nava-Quintero
Summary: The differences in electrical performance of two batches of X7R-0603 BME-MLCCs may be attributed to the formation of undesired precipitates due to variations in raw materials sourced from different ore deposits, affecting the overall performance of the MLCCs.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
O. V. Belousov, R. V. Borisov, N. V. Belousova, G. M. Zeer, A. S. Romanchenko
Summary: The research studied the reduction of divalent nickel with hydrazine hydrate from alkaline ammonia solutions at elevated temperatures and proposed a method to synthesize finely divided nickel powders. It was found that needle-like and spherical particles can form under different synthesis conditions, with the specific surface area of the metallic nickel powders ranging from 5-20 m(2)/g depending on the synthesis conditions. X-ray analysis showed that the powders are mixtures of nickel and nickel hydroxide, with X-ray photoelectron spectroscopy revealing that the particles consist of a nickel(0) core coated with nickel hydroxide layers.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Seung Hyun Jin, Hae Won Lee, Na Won Kim, Byung-Woo Lee, Gil-Geun Lee, Youn-Woo Hong, Woo Hyun Nam, Young Soo Lim
Summary: This study demonstrates the sonochemically activated solid-state synthesis of BaTiO3 powders, which accelerates the phase conversion process and can replace traditional ball-mill mixing methods.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Milica Spasojevic, Milentije Lukovic, Suzana Arnaut, Ema Maricic, Miroslav Spasojevic
Summary: A novel multiferroic composite material was successfully synthesized, and the microstructure, magnetic properties, and thermal stability of the material were found to be sensitive to the grinding time.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Cerem Piskin, Levent Karacasulu, Gloria Ischia, Mauro Bortolotti, Cekdar Vakifahmetoglu
Summary: Single-phase KNN can be achieved through hydrothermal synthesis, and further incorporation of sodium ions into the crystal can be obtained by post-annealing, approaching the morphotropic phase boundary.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Acoustics
Hae Won Lee, Na Won Kim, Woo Hyun Nam, Young Soo Lim
Summary: This paper reports a sonochemical activation process in an aqueous medium for the synthesis of BaTiO3 powders through a solid-state reaction. The role of the aqueous medium in enhancing the solid-state reaction is investigated, providing insights for cost-effective synthesis of BaTiO3 and the understanding of sonochemical processes using partially soluble raw materials.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Tamsin O'Reilly, Kristina Holsgrove, Ali Gholinia, Danielle Woodruff, Andrew Bell, John Huber, Miryam Arredondo
Summary: Polycrystalline ferroelectrics play a crucial role in advanced technologies, but the influence of domain wall continuity across grain boundaries on their properties is not well understood. In this study, researchers investigated several grain junctions in BaTiO3 thin films and confirmed that domain continuity is related to compatibility conditions at the grain boundary. Theoretical exploration of different combinations of Euler angles in bi-grain junctions provided insights into cases where domain continuity can be expected. These findings contribute to the understanding and control of domain wall continuity in polycrystalline ferroelectrics.
Article
Materials Science, Multidisciplinary
M. M. Mikhailov, A. N. Lapin, S. A. Yuryev, O. A. Alekseeva
Summary: BaZrxTi(1 - O-x)(3) powders were synthesized through solid-state synthesis method, and the effects of zirconium atom concentration on the grain-size distribution, phase composition, and spectral properties were investigated. The presence of unreacted TiO2 nanoparticles and small particle sizes were found to contribute to the high reflectance in the visible region and low solar absorptance of the powders.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
V. A. Lukacs, G. Caruntu, O. Condurache, C. E. Ciomaga, L. P. Curecheriu, L. Padurariu, M. Ignat, M. Airimioaei, G. Stoian, A. Rotaru, L. Mitoseriu
Summary: This study presents the preparation and properties of BaTiO3 nanostructured ceramics with porosity levels close to the percolation limit. The ceramics exhibited nanosized grains and multiscale porosity, leading to unique dielectric properties and a potential for gas sensing applications. Preliminary qualitative tests with acetone vapours showed promising responses from the ceramics, indicating potential for gas sensing mechanisms at the interface.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
J. S. Uribe-Chavira, G. Herrera-Perez, C. R. Santillan-Rodriguez, R. J. Saenz-Hernandez, J. A. Matutes-Aquino, M. C. Grijalva-Castillob
Summary: In this study, BaTiO3 ferroelectric powders were milled and sintered using plasma spark sintering. The milling process increased the weight fraction of the tetragonal phase and decreased the orthorhombic phase, resulting in an increase in lattice parameters. The Ti-O bond lengths increased with the Ti-polyhedral volume, due to enhanced microstrains and reduced crystallite size. The sintered ceramics showed opposite behavior in structural and microstructural parameters compared to the powders, potentially improving their piezoelectric properties.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Physical
Yuna Yan, Yan Zhang, Gang Shen, Xunran Cao, Kunquan Hong
Summary: A low-cost method was reported in this paper to synthesize ultra-long Na-doped MoS2 nanotubes on a large scale by sulfurizing precursors produced by a hydrothermal method. These nanotubes exhibit excellent electrocatalytic activity in dye-sensitized solar cells, with a power conversion efficiency of 5.85%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
S. M. Masoudpanah
Summary: Rod-like NiCo2O4 powders were synthesized using hydrothermal method and their structure and morphology were modified by adding PVP surfactant. The NiCo2O4 powders fabricated with PVP agent exhibited higher crystallinity and oxygen vacancies, resulting in improved microwave absorption performance. These findings are significant for the development of materials with efficient microwave absorption properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Ceramics
Mingnan Shangguan, Xiuyun Zhang, Chaoying Wang, Yunyun Zhao, Guisheng Zhu, Laijun Liu, Huarui Xu
Summary: A facile method using tartaric acid to prepare tetragonal BaTiO3 fine powders is proposed. The as-formed BaCO3 with high chemical activity coated the surface of TiO2 nanoscale needles, resulting in the formation of pure cubic phase BaTiO3 powders after calcining. The BaTiO3 ceramic prepared from these powders showed improved performances compared to ceramic prepared from traditional methods, making it suitable for high-performance MLCC applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Taixiang Feng, F. K. Yam
Summary: Anatase non-stoichiometric TiO2 nanostructure films were fabricated from titanates using alkaline hydrothermal method. The morphology of TiO2 transformed from nanosheets to nanowires. The TiO2 nanostructures showed anatase phase based on XRD patterns. The best photocurrent response was obtained for TiO2 annealed in air at 500 degrees C for 90 min, with a maximum photocurrent density of 149.1 mu A/cm2 at 0.8 V vs. Ag/AgCl, attributed to narrow bandgap, improved carrier density, and long carrier lifetime. Nanosheet morphology was found to be superior to nanowire morphology, and shorter hydrothermal treatment duration was beneficial for PEC water splitting properties.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Zeenat Jabeen, Asadullah Dawood, Muneerah Alomar, Salman Naeem Khan, Ihsan Ali, Muhammad Asif, Waseem Abbas, Muhammad Sultan Irshad, Mukhtar Ahmad
Summary: A series of single-phase nickel-substituted magnesium spinel ferrites were synthesized using the hydrothermal technique, and their morphology, structure, magnetism, and electrochemical properties were investigated. Experimental characterization techniques confirmed the presence of a single-phase spinel structure, with a decrease in lattice parameter and clustering of nanoparticles as nickel concentration increased. Raman and FTIR spectra indicated changes in wave numbers and the shortening of Fe-O bonds. Additionally, the ferrites exhibited increased saturation magnetization, decreased coercivity, decreased specific capacitance, and increased loop size. These ferrites are promising for energy storage applications.
SURFACES AND INTERFACES
(2023)
