Article
Materials Science, Ceramics
Agnieszka Lacz, Radoslaw Lach, Ewa Drozdz
Summary: Materials in the Ni/SrTiO3 system were synthesized and the effects of sintering conditions and nickel addition on material properties were investigated. The results demonstrated that a small amount of nickel could be incorporated into the perovskite structure, and nickel can exist in various oxidation states within the strontium titanate structure.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Saima Jahan, Mudasir Rashid Rather, Rubiya Samad, Khalid Sultan
Summary: In this study, particulate multiferroic composites with tuneable magneto-dielectric properties were synthesized. The effects of concentration of individual phases on the microstructure, dielectric, magnetic, and ferroelectric properties were systematically investigated. The results showed interesting modifications in the properties based on Pr doping and co-existence of the two phases.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Daniil Korona, Alexey O. Smelov, Artem R. Gilev, Irina E. Animitsa, Victoria I. Pryakhina
Summary: For the first time, the tetragonal perovskite phase Ce0.9Ca0.1AlO2.95 + x, containing cerium in the oxidation state of 3+, was synthesized and shows potential as an anode material for solid oxide fuel cells. The phase is stable up to 500°C in air and up to 700°C in argon. The electrical conductivity is primarily influenced by electronic conductivity and shows little sensitivity to the partial pressure of oxygen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Jose Juan Alvarado Flores, Maria Liliana Avalos Rodriguez, Jorge Victor Alcaraz Vera, Jose Guadalupe Rutiaga Quinones, Santiago Jose Guevara Martinez, Roberto Aguado Zarraga
Summary: SMMO double perovskites are globally recognized as anodic materials for solid oxide fuel cells due to their high electronic conductivity, electrocatalytic activity, and other properties, making them promising for potential applications in SOFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Alessandro Donazzi, Travis A. Schmauss, Scott A. Barnett
Summary: Direct utilization of alcohols in Solid Oxide Fuel Cells (SOFCs) can improve conversion efficiency by using excess heat for internal reforming and simplify the system balance of plant. Perovskite oxide anodes, such as the STF-Ru exsolution anodes, show promising catalytic reforming activity and electrochemical activity with steam/ethanol mixtures.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Ceramics
Minghui Ke, Wenjuan Wang, Xudong Yang, Baoguang Li, Haibin Li
Summary: In this study, anodes with double perovskite structure, La0.5Sr1.5Ti1.5Fe0.5O3-6, La0.5Sr1.5Ti1.5Co0.5O3-6, and La0.5Sr1.5Ti1.5Ni0.5O3-6, were synthesized for solid oxide fuel cells. Doping Fe, Co, and Ni elements into strontium titanate showed great potential in adjusting the conductivity and sintering kinetics of the anode materials.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Chao Shi, Qinyuan Lai, Aoping He, Xiyong Chen, Tianquan Liang, Yuezhou Wei, Nengneng Luo
Summary: High-performance ScSZ ceramics were successfully prepared at low temperature using the cold sintering process (CSP) associated with post-heat-treatment (PHT). The relative density and electrical conductivity of the ceramics exceeded those prepared by conventional sintering methods at higher temperatures. This study demonstrates that CSP is a promising method for preparing high-performance ScSZ ceramics at reduced temperature.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Alireza Ramezani, Hossein Abdizadeh, Mohammad Reza Golobostanfard
Summary: BaTiO3 and SrTiO3 thin films and BaTiO3/SrTiO3 lamellar composites were successfully synthesized using the sol-gel spin-coating method in this study. The morphology and band gap of the composite samples could be altered by changing the periodicity of the samples. The optical properties of the multi-stacked composites, including dielectric constant, dielectric loss, impedance, Urbach tail, extinction coefficient, and electric modulus, were also investigated.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Paulina Gwozdz, Agnieszka Lacz, Ewa Drozdz
Summary: The effect of synthesis method and calcium content on the properties of Sr1-xCaxTiO3 materials was investigated. It was found that increasing calcium content resulted in a decrease in symmetry and cell volume of the perovskite structure phases, regardless of the synthesis method. Materials synthesized by the wet chemical method had smaller grain size compared to those synthesized by the solid-state reaction. However, both synthesis methods showed an increase in grain size with increasing calcium content. Additionally, calcium content affected the porosity of materials synthesized by the wet chemical method, while it had little effect on materials synthesized by the solid-state reaction. Electrical properties measurements indicated ionic conductivity in Sr1-xCaxTiO3 materials regardless of the synthesis method.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Kapil Sood, Pankaj Tiwari, Shivani Dhall, Suddhasatwa Basu
Summary: This study evaluates titanium and samarium doped ceria as potential anode material for intermediate temperature solid oxide fuel cells. The synthesized materials are characterized in terms of phase, texture, chemical environment, and morphology. The results confirm the potential of the material as an anode material for IT-SOFCs.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Ceramics
JingJing Yang, ZhaoChen Wang, Hao Feng, YanHui Wei, GuoChang Li, YongCan Zhu, ChunCheng Hao, QingQuan Lei, ShengTao Li
Summary: Silicone rubber is widely used in electric power equipment due to its excellent insulation performance and weather resistance. However, its weak breakdown characteristic limits its application in high-voltage grade power equipment. This paper constructs a nano-modification system of silicone rubber using a binary composite matrix of phenyl-vinyl. The introduction of the benzene ring structure improves the breakdown strength of the matrix, while the use of barium strontium titanate (BST) improves the permittivity of the composite, reducing the electric field shared by silicone rubber.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Hee Jae Kim, Jae Hyeon Jo, Ji Ung Choi, Natalia Voronina, Docheon Ahn, Tae-Yeol Jeon, Hitoshi Yashiro, Yauhen Aniskevich, Genady Ragoisha, Eugene Streltsov, Seung-Taek Myung
Summary: Carbon-modified Li4Ti5O12 spinel successfully stores potassium and exhibits excellent electrode performance, including high initial charge capacity, cycling stability, and high-rate capability.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ala Eddin Mabrouki, Olfa Messaoudi, Latifah H. H. Alfhaid
Summary: In this study, experimental characterizations and DFT calculations were used to investigate the influence of cations distribution on the properties of Li0.5Zr0.5Mg0.5Fe1.5O4 spinel. The results showed that cations migration occurred between different spinel sites with increasing annealing temperature. The DFT calculations and measurements confirmed the semiconductor behavior of the compounds and an increase in bandgap with annealing temperature. The work also examined the discharge process of Li0.5Zr0.5Mg0.5Fe1.5O4 as a cathode for lithium batteries.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Materials Science, Characterization & Testing
Eyob Wondu, Zelalem Chernet Lule, Jooheon Kim
Summary: This study aims to fabricate a composite material with a high dielectric constant and suitable thermal conductivity, consisting of thermoplastic polyurethane (TPU) and carbon nanotube (CNT)-covered strontium titanate (SrTiO3). The results showed that the dielectric constants of the composites with 40% CNT-covered SrTiO3 were three times higher than the pure TPU matrix. The thermal conductivity was significantly improved by 9 times compared with the pure TPU, while the tensile strength and thermal stability were minimally affected.
Review
Physics, Multidisciplinary
Naiem Ahmed, Sangeeta Devi, Mohd Arif Dar, S. Kaleel Mohamed Ibrahim, Amit Sharma, Neha Sharma, Surinder Paul, S. Rafi Ahamed
Summary: Solid oxide fuel cell (SOFC) is an efficient technology that converts chemical energy into electrical energy without burning fuel. It consists of electrodes and electrolytes, and multiple cells are stacked together to generate high energy. SOFC operates by internally transporting O2- ions and utilizing common metals for rapid electrocatalysis. Additionally, it uses hydrogen for proton transportation. Yttrium-stabilized zirconia (YSZ) is the most frequently used solid electrolyte material in SOFC.
INDIAN JOURNAL OF PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Agnieszka Lacz, Radoslaw Lach, Ewa Drozdz
Article
Materials Science, Ceramics
Adrian Mizera, Ewa Drozdz
CERAMICS INTERNATIONAL
(2020)
Article
Chemistry, Physical
Lukasz Zych, Anna Maria Osyczka, Agnieszka Lacz, Agnieszka Rozycka, Wiktor Niemiec, Alicja Rapacz-Kmita, Ewa Dzierzkowska, Ewa Stodolak-Zych
Summary: The study investigated the effects of different types of silica nanoparticles on the properties of nanocomposites for guided bone regeneration. It found that silica nanoparticles with higher specific surface area exhibited greater chemical activity and the presence of hydroxyl groups, while those with lower specific surface area showed lower chemical activity and lacked hydroxyl groups on the surface.
Article
Chemistry, Physical
Patryk Blaszczak, Adrian Mizera, Beata Bochentyn, Sea-Fue Wang, Piotr Jasinski
Summary: The study focused on preparing and investigating the catalytic activity of nanometric CeO2 decorated with transition metal oxides under high temperature methanation process conditions. The use of beta-cyclodextrin in the synthesis process led to smaller metal nanoparticles with higher dispersion and integration, resulting in enhanced catalytic activity and stability. Ni and Co-containing samples showed the most significant catalytic effects in methane synthesis.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Adrian Mizera, Andrzej Kowalczyk, Lucjan Chmielarz, Ewa Drozdz
Summary: Two series of strontium titanates doped with Ni, Co, or Cu were prepared using the wet chemical method, with different stoichiometries. These materials were characterized for their structural properties, possibility of reduction and oxidation reactions, and catalytic properties. Ni-doped samples showed the highest catalytic activity in dry reforming of methane reaction, while Co and Cu-doped samples had minimal catalytic effects. Additionally, a decrease in methane conversion with increasing calcination temperature was observed for Ni-doped strontium titanates.
Article
Chemistry, Physical
Marzena Mitoraj-Krolikowska, Ewa Drozdz
Summary: This paper investigates the oxidation behavior of titanium-aluminum and titanium-aluminum-niobium systems using the temperature-programmed oxidation and reduction method, revealing interesting phenomena in the initial stages of oxidation. The results provide important insights into the oxidation mechanism.
Article
Materials Science, Ceramics
Agnieszka Lacz, Radoslaw Lach, Ewa Drozdz
Summary: Materials in the Ni/SrTiO3 system were synthesized and the effects of sintering conditions and nickel addition on material properties were investigated. The results demonstrated that a small amount of nickel could be incorporated into the perovskite structure, and nickel can exist in various oxidation states within the strontium titanate structure.
CERAMICS INTERNATIONAL
(2022)
Article
Thermodynamics
Paulina Gwozdz, Agnieszka Lacz, Adrian Mizera, Ewa Drozdz
Summary: In this study, copper-doped strontium titanate materials were synthesized using the sol-gel method, aiming to evaluate their potential applications in energy storage and conversion. The structural, microstructural, reduction-oxidizing, and electrical properties of the materials were investigated, revealing that copper doping can enhance the conductivity of the materials.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Adrian Mizera, Patryk Blaszczak, Beata Bochentyn, Radoslaw Lach, Ewa Drozdz
Summary: A series of Cu-support systems were tested as potential candidates for DIR-SOFC catalysts in the dry reforming of methane (DRM). The catalytic activity of Cu-support materials in DRM reaction depends on the copper oxidation state and specific surface area. Cu-SrTiO3 exhibited the highest catalytic activity among all the materials tested.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Juliusz Leszczynski, Krzysztof Kapera, Adrian Mizera, Pawel Nieroda, Andrzej Kolezynski
Summary: This study attempted to achieve n-type conductivity in tetrahedrites by doping with magnesium. The experimental results showed that Mg doping reduces the concentration of holes, but sufficient magnesium doping to achieve n-type conductivity was not successful.
Article
Materials Science, Ceramics
Paulina Gwozdz, Agnieszka Lacz, Ewa Drozdz
Summary: The effect of synthesis method and calcium content on the properties of Sr1-xCaxTiO3 materials was investigated. It was found that increasing calcium content resulted in a decrease in symmetry and cell volume of the perovskite structure phases, regardless of the synthesis method. Materials synthesized by the wet chemical method had smaller grain size compared to those synthesized by the solid-state reaction. However, both synthesis methods showed an increase in grain size with increasing calcium content. Additionally, calcium content affected the porosity of materials synthesized by the wet chemical method, while it had little effect on materials synthesized by the solid-state reaction. Electrical properties measurements indicated ionic conductivity in Sr1-xCaxTiO3 materials regardless of the synthesis method.
CERAMICS INTERNATIONAL
(2023)
Article
Thermodynamics
Adrian Mizera, Ewa Drozdz
Summary: Two wet-synthesis methods, citrate-combustion and modified Pechini synthesis, were used to obtain Co-doped strontium titanate. The modified Pechini approach lowered the calcination temperature and produced more structurally homogeneous materials compared to citrate-combustion methods. Cobalt oxide phases were detected in the modified Pechini materials through HT XRD measurements, which were not visible using conventional XRD measurements. The presence of cobalt oxide was confirmed for both series of materials based on TPR tests, and XAS results indicated the incorporation of cobalt into the perovskite structure.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)