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
Instruments & Instrumentation
N. R. Pereira, A. T. Macrander, E. C. Harding
Summary: Optimum performance in x-ray imaging and spectroscopy of plasmas with bent crystals requires perfect reflection of x rays across the crystal surface. However, typical flat quartz crystal samples reflect x rays differently across their surface, and additional processing is needed to improve uniformity. Nonuniform x-ray reflection is harder to document for strongly bent crystals, but it can be resolved using a knife edge.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Construction & Building Technology
Tomasz E. Burghardt, Karl Ettinger, Birgit Kock, Christoph Hauzenberger
Summary: The study evaluated representative types of glass beads from different manufacturing plants and found that the analyzed industrial glass beads were fully annealed, amorphous, and free from hazardous ingredients.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Physics, Multidisciplinary
Paul Loubeyre, Florent Occelli, Paul Dumas
Summary: This study investigates the influence of nuclear quantum fluctuations on the properties of dense hydrogen, focusing on its potential metallization. Raman spectroscopy and synchrotron infrared absorption measurements are conducted on deuterium at 460 GPa and 80 K, revealing the isotopic effects on the electronic and vibrational properties in phase III. The findings also suggest a probable transition to metal deuterium, occurring at a shifted pressure compared to hydrogen, and are compared to advanced calculations quantifying the reduction of the band gap caused by nuclear quantum fluctuations.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Akinobu Niozu, Yoshiaki Kumagai, Toshiyuki Nishiyama Hiraki, Hironobu Fukuzawa, Koji Motomura, Maximilian Bucher, Kazuki Asa, Yuhiro Sato, Yuta Ito, Daehyun You, Taishi Ono, Yiwen Li, Edwin Kukk, Catalin Miron, Liviu Neagu, Carlo Callegari, Michele Di Fraia, Giorgio Rossi, Davide Emilio Galli, Tommaso Pincelli, Alessandro Colombo, Shigeki Owada, Kensuke Tono, Takashi Kameshima, Yasumasa Joti, Tetsuo Katayama, Tadashi Togashi, Makina Yabashi, Kazuhiro Matsuda, Christoph Bostedt, Kiyoshi Ueda, Kiyonobu Nagaya
Summary: This study explores the formation process of solid Xe nanoparticles in an expanding supercooled Xe jet under vacuum conditions using X-ray diffraction experiments. It is found that the structure of Xe nanoparticles is a mixture of face-centered cubic and randomly stacked hexagonal close-packed structures, rather than pure face-centered cubic. Instantaneous coexistence of comparably sized face-centered cubic and hexagonal close-packed domains in single Xe nanoparticles is observed.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Materials Science, Multidisciplinary
David M. Jarvis, Matthew J. Coak, Hayrullo Hamidov, Charles R. S. Haines, Giulio I. Lampronti, Cheng Liu, Shiyu Deng, Dominik Daisenberger, David R. Allan, Mark R. Warren, Andrew R. Wildes, Siddharth S. Saxena
Summary: FePS3, a layered magnetic van der Waals compound, exhibits a Mott insulator-metal transition under applied pressure, accompanied by changes in crystal symmetry and magnetic structure. To understand these transitions, it is essential to study the crystal structure as a function of pressure. Through single-crystal and powder x-ray diffraction measurements, we have confirmed that the highest-pressure transition involves a collapse of interplanar spacing and an increase in symmetry from monoclinic to trigonal space group, supporting one model over competing alternatives. Our findings provide crucial insights into the high-pressure behavior of these materials and demonstrate a comprehensive methodology for investigating complex two-dimensional material structures under pressure.
Article
Physics, Multidisciplinary
Liang Ma, Kui Wang, Yu Xie, Xin Yang, Yingying Wang, Mi Zhou, Hanyu Liu, Xiaohui Yu, Yongsheng Zhao, Hongbo Wang, Guangtao Liu, Yanming Ma
Summary: The discovery of superconductive rare earth and actinide superhydrides has opened up a new era of high-pressure superconductivity research. The successful synthesis of CaH6 and its remarkable superconducting properties highlight the potential for further exploration and development of high-temperature superconducting materials.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Ceramics
Alessio Zandona, Bernd Ruedinger, Joachim Deubener
Summary: Glass powder samples of cordierite composition, doped with 8 mol% TiO2, were heat-treated to produce a series of Mg-bearing quartz solid solutions enriched in SiO2. Rietveld structural refinements showed that Mg-bearing Qss phases have trigonal symmetry and an intermediate structural arrangement dependent on composition. High-temperature diffraction measurements revealed a reversible inversion of quartz structure at SiO2-rich compositions, occurring at lower temperatures than pure quartz. Similarities and differences to Li-bearing Qss were discussed in the text.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Pascale Armand, Dominique Granier, Monique Tillard
Summary: In this study, millimeter-sized crystals of Ge1-xSixO2 were successfully synthesized using the high-temperature flux method. These crystals exhibit a non-centrosymmetric alpha-quartz-type structure and low defect levels. The complete mutual solubility between alpha-SiO2 and alpha-GeO2 was confirmed.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Motoki Shiga, Akihiko Hirata, Yohei Onodera, Hirokazu Masai
Summary: Rings composed of chemically bonded atoms are important topological motifs for ordering of network-forming materials. In this article, two quantitative analysis methods based on rings are proposed to reveal information on ordering and linkages in crystalline and amorphous materials.
COMMUNICATIONS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Jiaming Li, Enwei Sun, Yaping Ma, Huashan Zheng, Hua Zhao, Zhiguo Zhang
Summary: This study proposes a method to quantitatively characterize the phase transition processes of ferroelectric materials using fluorescence wavelength shift, demonstrating exact consistency between changes in fluorescence peak positions and structural phase transitions. The contactless, non-destructive fluorescence method provides localized quantitative analysis for phase transition processes in ferroelectric materials. The method based on fluorescence peak wavelength dependence on crystal environment may potentially be applied to characterize phase transitions in other ferroelectric materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Shuo Feng, Rajesh Kumar Singh, Yucheng Fu, Zhuo Li, Yulong Wang, Jie Bao, Zhijie Xu, Guosheng Li, Cassidy Anderson, Lili Shi, Yuehe Lin, Peter G. Khalifah, Wei Wang, Jun Liu, Jie Xiao, Dongping Lu
Summary: In this study, a simple strategy was demonstrated for constructing low-tortuosity through-pores in both vertical and planar directions of electrodes by casting large particles into single-particle-layer electrodes. Through multi-scale characterizations and simulations, correlations between material/electrode structures, electrolyte permeability, polysulfide migration, and sulfur reactions were elucidated. The high-loading and dense sulfur cathode fabricated by this method delivers a high specific capacity at a very low electrolyte/sulfur ratio.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Geochemistry & Geophysics
Pat Kalita, Paul E. Specht, Justin L. Brown, Lena M. Pacheco, Josh M. Usher, Christopher T. Seagle
Summary: This study aims to investigate the kinetics of the high-pressure phase transition of CaF2 and its subsequent reversal using time-resolved experiments. The results demonstrate the time dependence of phase transitions and highlight the necessity of modeling transition kinetics in dynamically driven processes.
Article
Materials Science, Ceramics
Zungang Zhu, Yongfu Long, Xin Xue, Yue Yin, Bo Zhu, Benjun Xu
Summary: Controlling the crystallinity of titanium dioxide is important for its potential applications. In this study, the effects of calcium doping on the anatase-rutile phase transition were investigated using in-situ high-temperature X-ray diffraction. The results showed that calcium doping increased the phase transition temperature and reduced the activation energy.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Sylvia L. Hanna, Michael Barsoum, Tekalign Terfa Debela, Christos D. Malliakas, Madeleine A. Gaidimas, Julia G. Knapp, Kent O. Kirlikovali, Christopher H. Hendon, Vinayak P. Dravid, Omar K. Farha
Summary: We report the first complete reaction energy landscape of metal-organic framework (MOF) interpenetration, specifically in the phase transformation of NU-1200 to STA-26. The thermodynamics of this phase transformation were characterized through experiments paired with density functional theory (DFT) calculations. Time-resolved in situ X-ray diffraction and the Avrami-Erofe'ev model were used to monitor phase transformation reaction profiles and extract kinetic information. The results revealed slower phase change kinetics for MOFs with stronger bonds and a mechanistic model of partial dissolution for this phase transformation.
ACS MATERIALS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Giovanna Canu, Giorgia Confalonieri, Marco Deluca, Lavinia Curecheriu, Maria Teresa Buscaglia, Mihai Asandulesa, Nadejda Horchidan, Monica Dapiaggi, Liliana Mitoseriu, Vincenzo Buscaglia
Article
Chemistry, Multidisciplinary
Marcello Merli, Alessandro Pavese
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES
(2018)
Article
Chemistry, Multidisciplinary
Giorgia Confalonieri, Vincenzo Buscaglia, GianCarlo Capitani, Giovanna Canu, Nicola Rotiroti, Andrea Bernasconi, Alessandro Pavese, Monica Dapiaggi
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2018)
Article
Instruments & Instrumentation
Giorgia Confalonieri, Vincenzo Buscaglia, Giovanna Canu, Maria Teresa Buscaglia, Monica Dapiaggi
JOURNAL OF SYNCHROTRON RADIATION
(2019)
Article
Materials Science, Multidisciplinary
Nadia Curetti, Marcello Merli, Silvana Capella, Piera Benna, Alessandro Pavese
PHYSICS AND CHEMISTRY OF MINERALS
(2019)
Article
Paleontology
Gaia Crippa, Giovanni Pasinetti, Monica Dapiaggi
Article
Chemistry, Multidisciplinary
Giorgia Confalonieri, Nicola Rotiroti, Andrea Bernasconi, Monica Dapiaggi
Article
Multidisciplinary Sciences
Cinzia Bottini, Monica Dapiaggi, Elisabetta Erba, Giulia Faucher, Nicola Rotiroti
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Physical
Giovanna Canu, Francesco Giannici, Alessandro Chiara, Giorgia Confalonieri, Alessandro Longo, Maria Teresa Buscaglia, Monica Dapiaggi, Vincenzo Buscaglia, Antonino Martorana
Summary: Scheelite-type materials like LaNbO4 are being considered as potential alternatives to common fluorite and perovskite structures for ion conductivity, with tungsten introduction leading to compatible conduction properties. Research showed that introducing tungsten in LaNbO4 structure can suppress monoclinic distortion, making the tetragonal phase predominant at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Construction & Building Technology
Ana Cuesta, Isabel Santacruz, Angeles G. De la Torre, Monica Dapiaggi, Jesus D. Zea-Garcia, Miguel A. G. Aranda
Summary: The study reveals that the Ca/Si ratio of C-S-H gel depends on the scale, with discrepancies at the nanoscale. Different researches point to the location of the excess Ca(OH)(2) component at the nanoscale, while also indicating its presence in the tobermorite structure or nanoportlandite. The results suggest that the C-S-H gel formed by the pozzolanic reaction has a local structure similar to the primary C-S-H gel, with the excess Ca(OH)(2) portion likely existing as nanoparticles.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Physics, Condensed Matter
P. Fornasini, R. Grisenti, M. Dapiaggi, G. Agostini
Summary: The study indicates that there is a local rhombohedral distortion of Sn in SnTe in the temperature range from 5 to 480 K, even above 300 K. The anomalous behavior of the third and fourth EXAFS cumulants at and above 300 K may be related to the softening of high frequency modes or the presence of multiple phases.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Environmental Sciences
Monica Dapiaggi, Marco Alloni, Riccardo Carli, Nicola Rotiroti, Giorgia Confalonieri
Summary: This paper presents a quick method for quantifying nickel species in spent FFC catalysts, first in a matrix of fresh zeolite Y and then in a complex matrix similar to that of a real spent catalyst. The method is carefully validated with known quantities of NiO before analyzing a set of real spent catalysts representing a 12-month period.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Materials Science, Ceramics
Andrea Bernasconi, Monica Dapiaggi, Chiara Milanese, Marco Alloni, Alessandro Pavese
Summary: The atomic structure of a soda-lime-aluminosilicate network glass that underwent two different thermal treatments has been investigated using in-situ Synchrotron Powder Diffraction experiments. The study revealed the volume variations, relaxation level, short range order characteristics, and structural features of the samples under different thermal treatments. The results describe the multiple over temperature phenomenology of the composition and show how the local range behaves independently from the sample's thermal history.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Nadia Curetti, Davide Bernasconi, Piera Benna, Gianluca Fiore, Alessandro Pavese
Summary: The two most common polymorphs of MnO2 are often found together in nature, and their transformation process involves two steps with an amorphous phase intermediate. The activation energies of the two forms are comparable, but the pre-exponential factor of the amorphization of ramsdelitte is two orders of magnitude larger than the crystallization of pyrolusite.
PHYSICS AND CHEMISTRY OF MINERALS
(2021)
Article
Green & Sustainable Science & Technology
Quentin Wehrung, Enrico Destefanis, Caterina Caviglia, Davide Bernasconi, Linda Pastero, Marco Bruno, Andrea Bernasconi, Alex Magnetti Vernai, Alice Di Rienzo, Alessandro Pavese
Summary: This study focused on the energy-intensive heating step in the MDEA/PZ solvent regeneration process for CO2 separation. By investigating the desorption kinetics under low-pressure and low-temperature conditions, it was found that the combination of pressure reduction and temperature increase significantly enhanced the desorption kinetics, especially at low temperatures.
Article
Materials Science, Ceramics
Dan Zhao, Yi Feng, Zhipeng Pi, Fan Zhang
Summary: Phase equilibria in the ZrO2-GdO1.5-TaO2.5 (ZGTO) system were experimentally investigated, and the differences between ZGTO and the existing ZrO2-YO1.5-TaO2.5 (ZYTO) were discussed. The study is useful for thermodynamic assessment of ZGTO and can guide the design of novel thermal barrier coatings materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yutaka Ohya, Wingki Mey Hendra, Chika Takai-Yamashita, Takayuki Ban
Summary: Diffusion couples of rutile and corundum single crystals were prepared and examined to study the solid solution and precipitation of corundum in rutile during cooling. Different precipitation forms of corundum were observed under different cooling conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiaming Zhan, Yunfa Guo, Hao Wang
Summary: This study systematically investigates the mechanical behaviors of calcium fluoride in humid environments. The effects of water on the deformation and plastic enhancement of CaF2 under indentation are explored through microindentation experiments, atomic simulations, and Raman spectroscopy measurement.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hangfeng Zhang, Henry Giddens, Theo Graves Saunders, Matteo Palma, Isaac Abrahams, Haixue Yan, Yang Hao
Summary: The relationship between low and high frequency tunabilities in tin substituted barium titanate ceramics was investigated. It was found that there are differences in tunabilities at different frequencies due to the different activities of larger ferroelectric domains and polar nanoclusters.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Kaibiao Xi, Jiacheng Liu, Beibei Song, Huarong Cheng, Yihao Li, Xiaole Yu, Mupeng Zheng, Mankang Zhu, Yudong Hou
Summary: Composite modulation in the superparaelectric state of the BTBZ-CT system is proposed as an effective strategy to achieve both NTCC and excellent energy storage performance in dielectric ceramics. The addition of BZ and CT to BT ferroelectrics can move the SPE state to the normal use temperature zone, resulting in enhanced NTCC characteristics and energy storage performance. Furthermore, intentional precipitation of CT at grain boundaries can refine the grain size, increase the bandgap, and strengthen the local electric field distribution, thereby enhancing the breakdown electric field.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hamed Salimkhani, Lovro Fulanovic, Till Froemling
Summary: The demand for robust multilayer ceramic capacitors with high-temperature and high-power capabilities is increasing rapidly. However, cost-effective production is a challenge. This study investigates the use of Na0.5Bi0.5TiO3-based materials as promising lead-free options. By adding sintering aids, the sintering temperature of Na0.5Bi0.5TiO3-BaTiO3-CaZrO3-BiAlO3 solid solutions was successfully reduced to 975 degrees C, suitable for co-sintering with Cu electrodes without adverse effects on capacitor properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Mingxing Li, Ran Mo, Zeshui Xu, Jie Zhou, Conglin Zhang, Xuefeng Cui, Fang Ye, Laifei Cheng, Ralf Riedel
Summary: Polymer infiltration and pyrolysis is an effective method for preparing ceramic matrix composites. The transformation of polymer to ceramic during the process affects the residual stress and interface behavior in the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yan Kang, Lin Chen, Chang-Jiu Li, Guan-Jun Yang
Summary: A novel abradable seal coating with low hardness and high bonding strength was successfully designed and prepared. This coating has significantly higher abradability and erosion resistance compared to metal-based coatings, and can retain excellent abradability and have a long lifetime during service.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Qingzhong Song, Xiangdong Zha, Ming Gao, Yingche Ma
Summary: This study analyzes the influence of calcia refractory purity on the properties of calcia crucibles. Higher purity calcia results in well-developed grains and improved hydration resistance, leading to better high-temperature strength and thermal shock resistance. In contrast, lower purity calcia crucibles exhibit inferior properties. Therefore, high-purity calcia is considered a potential refractory for manufacturing oxide crucibles.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sehreish Abrar, Faisal Nazeer, Zhuang Ma, Ling Liu, Abdul Malik, Mustafa Kamal, Abdullah G. Al-Sehemi
Summary: To raise the operating temperature of Si-based ceramic matrix composites (CMCs), researchers have applied thermal/environmental barrier coating (T/EBCs) materials, typically rare earth silicates. However, the high thermal conductivity and the mismatch of thermal expansion have been major challenges in developing new materials that can offer thermal insulation and environmental protection to CMCs. In this study, entropy engineering was used to create a multicomponent equi-atomic single-phase pyro silicate with extremely low thermal conductivity and enhanced water vapor corrosion resistance. The research findings show the potential of high entropy disilicates in achieving ultra-low thermal conductivity and low weight loss in corrosive environments.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zi-bo Niu, Daxin Li, Dechang Jia, Zhihua Yang, Kunpeng Lin, Paolo Colombo, Ralf Riedel, Yu Zhou
Summary: In this study, SiBCN ceramics with a special structure were prepared to improve the oxidation resistance. The effect of the structure on oxidation behavior and kinetics was investigated, revealing that the special structure can effectively inhibit heterogeneous oxidation and enhance the oxide layer composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Melike Donmez, Metehan Erdogan, Cihangir Duran
Summary: The limited densification of CeO2 ceramics was improved by using an anorthite-based glass, resulting in high dielectric constant and quality factor with minimum dielectric loss. The CeO2-(anorthite-based) glass ceramic showed promising results in terms of low temperature densification and microwave properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
S. Rahmati, R. G. A. Veiga, J. Mostaghimi, T. Coyle, A. Dolatabadi
Summary: This study provides an atomic-scale description of the high-velocity impact of alpha-Al2O3 particles onto an alpha-Al2O3 substrate during Aerosol Deposition (AD). The results suggest that the crystal orientation plays a crucial role in both plasticity and damage of the nanoparticles. Impact velocity has a direct correlation with plasticity and fragmentation, but adhesion efficiency has only a marginal increase. The crucial element lies in the substrate's surface alterations caused by the fragments left on the substrate after impact.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Bo-Wen Chen, Yan-Mei Kan, De-Wei Ni, Chun-Jing Liao, Hong-Da Wang, Yu-Sheng Ding, Shao-Ming Dong
Summary: This study characterized the long-term and repeated ablation properties of modified Cf/HfC-SiC composites with YB4-Al2O3-Si3N4 under an air plasma torch. The structural stability and viscosity of the oxide layer were found to affect the ablation resistance of the composites. By forming nano c-HfO2 grains and high-viscosity Al-Si-Y-O glassy phase, the structural stability of the oxide layer was improved, resulting in enhanced ablation resistance. However, the oxidation of Si3N4 led to the formation of NO, NO2, and excessive SiO2 glassy phase, which resulted in a porous structure and reduced the viscosity of the oxide layer. Therefore, the addition of Si3N4 decreased the ablation resistance of the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yongxing Wei, Huawei Zhang, Siyuan Dong, Changqing Jin, Chenxing Bai, Junle Dai, Zengzhe Xi, Zhonghua Dai, Zengyun Jian, Li Jin
Summary: In this study, solid solutions of xBi(Ni1/2Hf1/2)O-3-(1 - x)PbTiO3 (xBNH-PT) were synthesized to investigate their phase boundary behaviors and physical properties. The presence of a tetragonal-pseudocubic phase boundary and a spontaneous ferroelectric-relaxor transition at specific compositions were confirmed. The introduction of a tetragonal-pseudocubic phase boundary improved the piezoelectric properties and suppressed the spontaneous ferroelectric-relaxor transition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)