Article
Chemistry, Physical
H. Moreno, J. A. Cortes, F. M. Praxedes, S. M. Freitas, M. V. S. Rezende, A. Z. Simoes, V. C. Teixeira, M. A. Ramirez
Summary: Experimental and computational analyses were conducted to study the microstructure and optical properties of CaCu3Ti4O12 (CCTO) ceramic systems with different percentages of W. The addition of W was found to induce structural changes and influence the luminescent performance of the material. The research suggests that this ceramic system may hold promise for applications in photonics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Jutapol Jumpatam, Bundit Putasaeng, Narong Chanlek, Jakkree Boonlakhorn, Prasit Thongbai, Nutthakritta Phromviyo, Prinya Chindaprasirt
Summary: Co-doping with Sr2+/F- ions improved the dielectric properties of CaCu3Ti4O12 ceramics, reducing grain size and creating insulating grain boundary layers. This led to optimized dielectric properties with high dielectric permittivity and low loss tangent. The Schottky barrier height at grain boundaries also increased, improving overall electrical properties.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Thermodynamics
Dan-Dan Du, Ning Ren, Jian-Jun Zhang
Summary: Two novel isostructural lanthanide complexes were synthesized using 2-fluorobenzoic acid and 5,5'-dimethy-2,2'-bipyridine, characterized by IR, elemental analysis, and single-crystal X-ray diffraction, showing specific crystal structure and thermal behavior.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
Qi Bu, Jing Hu, Bolin Xiang, Lei Yu, Yuejun Ouyang, Wei Wan, Tai Qiu
Summary: In this study, a binary composite material of CCTO/PVA with admirable dielectric properties was successfully fabricated by optimizing the morphology of CCTO particles. The composite films filled with square CCTO particles exhibited the highest dielectric constant and low dielectric loss, showing promising potential for practical applications in electronics.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Thermodynamics
Halina Gluchowska, Renata Lyszczek, Anna Jusza, Ryszard Piramidowicz
Summary: The microwave-assisted solvothermal method was used to prepare lanthanide (III) complexes with N,N'-dimethylformamide (DMF), which contain DMF and water molecules in their structures. The complexes exhibit varying thermal stability, with solvent molecules being removed in a more complex manner, especially in heavy lanthanide complexes. Their thermal stability is higher in a nitrogen atmosphere. The thermal decomposition of the complexes was investigated through TG-FTIR methods, showing the evolution of volatile products such as DMF, H2O, CO2, CO, and CH4 during heating.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Electrical & Electronic
N. D. Chaudhari, D. Y. Nadargi, S. M. Kabbur, R. C. Kambale, A. Das, S. S. Suryavanshi
Summary: This article reports the structural, morphological, and elastic properties of NiXZn1-XFe2O4 ferrimagnetic oxides prepared using oxalate chemistry. The results show that the lattice constant decreases and the elastic moduli remains constant with increasing Ni2+ content.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Multidisciplinary Sciences
Maxim Varenik, Boyuan Xu, Junying Li, Elad Gaver, Ellen Wachtel, David Ehre, Prahlad K. Routh, Sergey Khodorov, Anatoly I. Frenkel, Yue Qi, Igor Lubomirsky
Summary: In this study, a low relative permittivity ceramic material ZrxCe1-xO2 with electromechanical properties comparable to the best performing electrostrictors was discovered. The electromechanical properties of ZrxCe1-xO2 are enabled by elastic dipoles formed under an applied anisotropic electric field, which distinguishes it from other materials.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
N. A. Zhuk, M. G. Krzhizhanovskaya, N. A. Sekushin, V. V. Kharton, L. A. Koksharova
Summary: The thermal behavior and electrical properties of Fe-doped CaCu3Ti4O12 ceramics samples have been thoroughly studied, indicating good thermal stability and ionic conductivity of the samples, along with unique thermal expansion characteristics at high temperatures.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Ceramics
Hao Zu, Chuanfeng Wang, Xiaojuan He, Bingzheng Wang, Hui Liu, Hui Huang, Jian Bian, Guohua Cao
Summary: CCTO materials with giant permittivity are desired in miniaturized multilayer devices, but Ni electrode cannot be used due to the decomposition of CCTO materials during sintering. By sintering in a close alumina crucible at a relatively low temperature induced by liquid phase, the decomposition reaction can be effectively suppressed. Furthermore, reoxidation in air can restore the frequency-dependent characteristics of CCTO-BN, making it possible to develop CCTO-based devices with Ni electrode.
CERAMICS INTERNATIONAL
(2023)
Review
Pharmacology & Pharmacy
Marek Wesolowski, Edyta Leyk
Summary: Using multiple measurement techniques ensures reliable interpretation of sample changes during heating, eliminating uncertainty and improving data interpretation. This paper briefly characterizes thermal analysis techniques coupled with spectroscopic or chromatographic techniques. Various design solutions for coupled thermogravimetry (TG) with infrared spectroscopy (FTIR), mass spectrometry (MS), and gas chromatography/mass spectrometry (GC/MS) systems are discussed. The importance of coupled techniques in pharmaceutical technology is highlighted, as they provide insights into the behavior and degradation of medicinal substances during heating, allowing determination of decomposition mechanisms and prediction of shelf life and storage conditions. In addition, design solutions for interpreting differential scanning calorimetry (DSC) curves using observation or simultaneous recording of FTIR spectra and X-ray diffractograms (XRD) are characterized, addressing the inherent non-specificity of DSC.
Article
Polymer Science
Anna Adamczyk
Summary: Materials of the ZrO2-SiO2 system were synthesized using the sol-gel method, and the effect of different ZrO2 precursors and annealing temperatures on the structure of the samples was analyzed using various characterization techniques.
Article
Thermodynamics
Fangyu Fan, Zongling Yang, Xianjun Xing
Summary: Corn straw, as a large-yield agricultural waste, can be thermochemically treated for comprehensive utilization. Advanced techniques like TG-FTIR and TG-GC/MS were used to analyze the pyrolysis process more clearly. Results showed that the pyrolysis of corn straw leads to the production of various volatile organic compounds, with significant changes in composition at different temperatures.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Multidisciplinary Sciences
O. Z. Yanchevskii, O. I. Vyunov, T. O. Plutenko, A. G. Belous, V. V. Trachevskii, I. Matolinova, K. Veltruska, V. Kalinovych, Ye Lobko
Summary: The microstructure, elements distribution, chemical composition of grains and grain boundaries, and the dielectric response of CCTO ceramics were investigated using various techniques. It was found that additives and milled particles can cause abnormal grain growth and the formation of low-melting eutectics at the grain boundaries. The presence of copper ions in different oxidation states and exchange spin interactions between them were confirmed in all samples.
Article
Engineering, Electrical & Electronic
Asmaa Ratep, Ismail Kashif
Summary: The study examines the impact of substituting CuO with Fe2O3 on the iron oxidation state and electrical conductivity of lithium borosilicate glass samples. Results indicate that the homogeneity of the glass increases with higher iron concentrations, and the ratios of Fe+2/Fe+3 are influenced by CuO. Moreover, iron ions in the glass samples mainly exist in the form of Fe2O3 in the ferrous state, with more than 7.5% concentration. Additionally, electrical conductivity is found to depend on the oxidation state of copper and the mixed transition metal effect.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Energy & Fuels
Jitendra Bahadur, Debanjan Chandra, Avik Das, Vikram Vishal, Ashish Kumar Agrawal, Debasis Sen
Summary: This study focuses on the nano-heterogeneities in shales and their effect on fluid transport properties. The researchers used SAXS experiments, CT scanning, and functional group mapping to study the porosity and anisotropy in shale samples. The results show that the orientation and spatial variation of pores are influenced by the organic matter content.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Chemistry, Multidisciplinary
H. S. Kushwaha, P. Thomas, Rahul Vaish
Article
Materials Science, Multidisciplinary
P. Bharathi, P. Thomas, K. B. R. Varma
JOURNAL OF MATERIALS CHEMISTRY C
(2015)
Article
Materials Science, Composites
Ramaswami Sachidanandan Ernest Ravindran, Paramanandam Thomas, Sahadevan Renganathan
SCIENCE AND ENGINEERING OF COMPOSITE MATERIALS
(2017)
Article
Electrochemistry
Moorthy Padmini, Perumal Elumalai, Paramanandam Thomas
ELECTROCHIMICA ACTA
(2018)
Article
Materials Science, Ceramics
P. Thomas, K. Dwarakanath, K. B. R. Varma
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2012)
Article
Thermodynamics
P. Thomas, R. S. Ernest Ravindran, K. B. R. Varma
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2014)
Article
Engineering, Chemical
P. Thomas, R. S. Ernest Ravindran, K. B. R. Varma
POLYMER ENGINEERING AND SCIENCE
(2014)
Article
Engineering, Electrical & Electronic
Arun Ram Prasath Ramaian Thirugnanam, Nandini Eswarappa Hudedmani, Nirmal Kumar Roy, Sankar Narayan Mahato, Thomas Paramanandam
IET SCIENCE MEASUREMENT & TECHNOLOGY
(2019)
Article
Engineering, Electrical & Electronic
P. Thomas, Nandini E. Hudedmani, R. T. Arun Ram Prasath, Nirmal Kumar Roy, Sankar Narayan Mahato
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2019)
Article
Materials Science, Ceramics
A. Ashokbabu, P. Thomas
CERAMICS INTERNATIONAL
(2019)
Article
Engineering, Electrical & Electronic
P. Thomas, A. Ashokbabu, R. S. Ernest Ravindran, Rahul Vaish
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2019)
Article
Thermodynamics
P. Thomas, A. Ashokbabu, Rahul Vaish
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2020)
Article
Physics, Applied
P. Thomas, B. S. Dakshayini, H. S. Kushwaha, Rahul Vaish
JOURNAL OF ADVANCED DIELECTRICS
(2015)
Article
Materials Science, Ceramics
Satyanarayan Patel, Aditya Chauhan, Rahul Vaish, P. Thomas
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2015)
Article
Physics, Applied
P. Thomas, K. B. R. Varma
JOURNAL OF ADVANCED DIELECTRICS
(2013)