Article
Materials Science, Multidisciplinary
Ajay Kumar Kalyani
Summary: This study reports a non-classical approach to obtain morphotmpic phase boundaries (MPB) in piezoelectric materials by choosing end members with similar polar symmetry, leading to an enhanced piezoelectric response.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Crystallography
Xiaoli Wang, Hejing Wang
Summary: The Rietveld method combined with a recursive structure-factor calculation has been successfully applied to describe the stacking disorder of interstratified illite-smectites, with the study verifying its applicability in determining structural parameters, and the reliability of refinements increasing with the proportion of illitic layers.
Article
Materials Science, Ceramics
Maryam Hasanzadeh Esfahani, Hojjat Naji, Casey A. Marjerrison, John Greedan, Mahdi Behzad
Summary: Two new RESmTi2O7 mixed metal oxides were synthesized using a modified solid state method. Characterization and analysis of the samples revealed the crystallographic parameters and crystal structure of the materials. Qualitative and quantitative phase analysis demonstrated the significant impact of RE ionic radius variations on the crystal structure of the pyrochlores.
CERAMICS INTERNATIONAL
(2022)
Article
Crystallography
Duc-Chau Nguyen, Chia-Chin Chu, Aswin Kumar Anbalagan, Chih-Hao Lee, Chia-Seng Chang
Summary: In this study, the bonding of metal-oxygen in the Ce-doped LaCoO3 system was explored using Rietveld refinement and synchrotron X-ray absorption techniques. The results showed that the addition of Ce caused a change in the structure of LaCoO3, making it best described by a cubic symmetry model. It was also found that Ce4+ was a more compatible dopant than Ce3+. X-ray absorption data supported the presence of partially filled La 5d-band and La-O bonds in pristine LaCoO3.
Article
Construction & Building Technology
O. Linderoth, L. Wadso, D. Jansen
Summary: This study showed that the thermal power of hydration can be measured for up to a year using isothermal calorimetry, and the degree of hydration can be determined with good agreement using various methods.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Construction & Building Technology
Beatriz Goncalves, Caio Exposito, Tomaz Toshimi Ishikawa, Guilherme Yuuki Koga
Summary: This project aims to understand the phase evolution during the hydration of two commercial Portland cements containing carbonate material using X-ray diffraction (XRD). The in-situ technique was compared with the conventional ex-situ method, and it was found that the ex-situ method was suitable for quantifying the contents of constituents and identifying aluminate hydrates. The in-situ approach offered time savings, but had limitations in phase quantification accuracy. The joint use of in-situ and ex-situ techniques can be favorable in an industrial environment, especially in the context of new standards.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Applied
Junhyuck Im, Jaewoo Jung, Kiho Yang, Donghoon Seoung, Yongmoon Lee
Summary: This study investigated the structural changes in zeolites fully exchanged with Sr, Cd, and Pb at temperatures ranging from room temperature to 350 degrees Celsius. The results showed that zeolites are easily dehydrated at high temperatures, and Sr and Pb may not have thermal stability while Cd remains intact.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
R. Sreekanth, Jayadev Pattar, A. Anupama, A. M. M. Mallikarjunaswamy
Summary: Magnesium oxide (MgO) nanoparticles were successfully synthesized using a simple precipitation method, resulting in small size and high surface area. These nanoparticles have potential applications as catalysts and in the next generation biosensor applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Jiaxin Gong, Jiheng Li, Xiaoqian Bao, Ruifen Hou, Xuexu Gao
Summary: The crystal structure and magnetic structure of Tb-Dy-Fe compounds were studied before and after annealing heat treatment, revealing the existence of tetragonal and rhombohedral phases at room temperature. The volume proportion of the hexagonal phase increased after heat treatment, and the effect of structural distortion on the magnetostriction of Tb-Dy-Fe was discussed based on analytical results.
Article
Chemistry, Multidisciplinary
Donghoon Seoung, Pyosang Kim, Hyeonsu Kim, Hyunseung Lee, Min Huh, Hyunwoo Lee, Yongmoon Lee
Summary: Mudeungsan, an extinct volcano in South Korea, formed in the Late Cretaceous period, is listed as a national geopark and UNESCO Global Geopark, but lacks basic research. The study revealed that Mudeungsan experienced an explosive eruption, based on the appearance of alpha-cristobalite in the volcanic rock samples.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Endale Abebe Gudeta
Summary: This study introduces a modified version of the Enzo-Parrish method to determine a straight background level with a nonzero gradient. The proposed method uses a scattering vector to determine the background and is validated on the XRD peak of a polymer sample.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Kenji Iwase, Shuhei Ishida, Takashi Ueno, Kazuhiro Mori
Summary: This study investigated the residual hydrogen occupation mechanisms in MgZn2-type and CaCu5-type cells during the hydrogen absorption-desorption process. The results revealed the structural changes and deuterium occupation in NdNi3Dx and provided insights into the preferred deuterium sites in different cell types.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Construction & Building Technology
Vineet Shah, Allan Scott
Summary: The study demonstrates that magnesium oxide based cements can serve as a promising alternative to Portland cement, and can be produced using calcined kaolinitic clay. The MgO binder shows comparable or better compressive strength and significantly lower porosity compared to systems containing silica fume. The presence of magnesium carbonate further enhances the physical properties of the clay mixes.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Construction & Building Technology
M. Cantaluppi, N. Marinoni, F. Cella, A. Bravo, F. Camara, G. Borghini, W. Kagan
Summary: The study investigated the influence of minor elements (Na2O and SiO2) on the mineralogy, chemistry, and microstructure of High Alumina Cements (HACs). Results showed that sodium and silicon were mainly incorporated in a sodium-rich phase, no minor phases such as gehlenite and/or mayenite occurred, and CA and CA(2) revealed a limited ionic substitution in the HACs studied.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Chemistry, Physical
Bryce G. Mullens, Matilde Saura-Muzquiz, Frederick P. Marlton, Maxim Avdeev, Helen E. A. Brand, S. Mondal, G. Vaitheeswaran, Brendan J. Kennedy
Summary: Synchrotron X-ray powder diffraction methods were used to study the structures and doping effects of lanthanoid tantalates and orthoniobates, revealing different crystal structures and changes in atomic bond lengths. This provides important clues for understanding the properties and phase transitions of these compounds.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Javier Ruiz, Rene Arauz, Mario Ceroni, Marilin Vivanco, Juan F. van der Maelen, Santiago Garcia-Granda
Article
Materials Science, Multidisciplinary
Elvira Zeballos-Velasquez, Veronique Wright, Leopoldo Suescun, Esteban Asto
MATERIA-RIO DE JANEIRO
(2019)
Article
Electrochemistry
Edgar Nagles, Mario Ceroni, John Hurtado
JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Juan F. Van der Maelen, Mario Ceroni, Javier Ruiz
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS
(2020)
Article
Chemistry, Analytical
Edgar Nagles, Mario Ceroni, Claudia Villanueva Huerta, John J. Hurtado
Summary: This study introduces a new application of MoO3 combined with carbon paste to prepare a microcomposite electrode for the simultaneous determination of PCM and AR. The electrode shows enhanced sensitivity and stability, with low detection limits and relative standard deviations. The performance of the electrode in terms of stability, shelf life, and potential interferences is also evaluated with positive results.
Article
Physics, Multidisciplinary
M. Quiroga Agurto, E. L. Zeballos Velasquez, F. A. Reyes Navarro
Summary: This study analyzed clays from quarries in the Cerro de Pasco region, Peru, evaluating their characteristics and the structural changes produced by heating, particularly in the interlaminar region. Different mineral phases were identified, with significant structural changes found in Ca-montmorillonite and kaolinite. Illite showed greater thermal stability, while quartz phase slightly increased its weight percentage with increasing temperature.
REVISTA MEXICANA DE FISICA
(2021)
Article
Materials Science, Multidisciplinary
Elvira Zeballos-Velasquez, Gabriel Prieto, Leonardo Arrelucea, Mirian Mejia, Miguel Andia, Frank Moya
Summary: This study characterizes the crystallographic structure of archaeological materials and geological samples in Peru, finding similar mineral components in ceramics and geological materials. The results could offer insights into the ancient settlers' dynamics in sourcing raw materials for ceramic production.
MATERIA-RIO DE JANEIRO
(2022)
Article
Chemistry, Analytical
Edgar Nagles, Mario Ceroni, John J. Hurtado-Murillo, John J. Hurtado
ANALYTICAL METHODS
(2020)
Article
Archaeology
Gabriel Prieto, Veronique Wright, Richard L. Burger, Colin A. Cooke, Elvira L. Zeballos-Velasquez, Aldo Watanave, Matthew R. Suchomel, Leopoldo Suescun
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2016)
Proceedings Paper
Physics, Atomic, Molecular & Chemical
Angel Bustamante, Francisco Capel, Flora Barba, Pio Callejas, Rivalino Guzman, Alejandro Trujillo
HYPERFINE INTERACTIONS
(2009)
Article
Chemistry, Multidisciplinary
J Ruiz, M Ceroni, OV Quinzani, V Riera, M Vivanco, S García-Granda, F Van der Maelen, M Lanfranchi, A Tiripicchio
CHEMISTRY-A EUROPEAN JOURNAL
(2001)
Article
Chemistry, Multidisciplinary
J Ruiz, M Ceroni, M Vivanco, MP Gonzalo, S Garcia-Granda, F van der Maelen
CHEMICAL COMMUNICATIONS
(2005)