Article
Materials Science, Ceramics
Ting Wang, Haiming Zhang, Lixia Cheng, Shenhua Song, Weiping Gong
Summary: Perovskite solid solution materials 0.67BiFeO(3)-0.33BaTiO(3) were synthesized using spark plasma sintering method. The materials sintered at 880℃ showed the highest density, compact microstructure, and enhanced fermelectric properties.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Zhiyong Wang, Jianping Wang, Yongsai Xu, Mingdong Yi, Guangchun Xiao, Zhaoqiang Chen, Jingjie Zhang, Hui Chen, Chonghai Xu
Summary: The impact of sintering rate on the microstructure and mechanical properties of cermets was explored using ultrafast sintering. The results showed that an appropriate heating rate could achieve rapid densification and inhibit abnormal grain growth, leading to excellent mechanical properties in (Ti, W)C cermets.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Ram Prakash Singh, Sujoy Saha
Summary: In this study, different additives were added to Dy-modified BiFeO3-PbTiO3 ceramics system, and it was found that all additives promoted the precipitation of the ferrimagnetic dysprosium iron garnet phase, while additives containing potassium suppressed grain size. The best combination of ferroelectric and ferromagnetic behavior was found in a mixture of additives.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yun Shi, Oleg Shichalin, Yifei Xiong, Denis Kosyanov, Tong Wu, Qian Zhang, Ling Wang, Zhenzhen Zhou, Hui Wang, Jinghong Fang, Huan He, Jinqi Ni, Chaoyue Wang, Qian Liu, Jianding Yu, Sheng Cui, Haibo Wang, Anton Belov, Eugeniy Papynov
Summary: Ce3+ doped Lu3Al5O12 ceramics were successfully fabricated by SPS, and their properties such as grain size and photoluminescence were investigated. The results showed that the SPS ceramics had smaller grain size, excellent thermal stability, and higher radioluminescence intensity.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Manufacturing
A. Muthuchamy, Muthe Srikanth, Dig Vijay Yadav, A. Raja Annamalai
Summary: This research investigates and characterizes the properties of W-Ni-Fe-Ta compositions through solid-state sintering using the Spark Plasma Sintering technique. The addition of Tantalum at lower temperatures improves the densification, microstructure, and mechanical properties of W-Ni-Fe tungsten heavy alloy. Nickel acts as an activator in the sintering process of tungsten.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Article
Materials Science, Ceramics
Jie Liang, Xuetong Zhao, Shenglin Kang, Jing Guo, Zhiling Chen, Yuli Long, Qian Zeng, Jianjie Sun, Lijun Yang, Ruijin Liao, Clive A. Randall
Summary: In this work, a hybrid cold sintering/spark plasma sintering (CSP-SPS) process is demonstrated for densifying and controlling grain growth in ZnO ceramics. The CSP-SPS process achieves high densities (>98%) at lower temperatures (200-300 ℃) and exhibits mild grain coarsening.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Roxana-Elena Patru, Catalina Andreea Stanciu, Elena Mirabela Soare, Vasile-Adrian Surdu, Roxana Doina Trusca, Adrian Ionut Nicoara, Bogdan Stefan Vasile, Georgia Boni, Luminita Amarande, Nadejda Horchidan, Lavinia Petronela Curecheriu, Liliana Mitoseriu, Lucian Pintilie, Ioana Pintilie, Adelina-Carmen Ianculescu
Summary: Dense fine-grained Ba0.6Sr0.4TiO3 ceramics were prepared by sol-gel synthesized nanopowders and Spark Plasma Sintering consolidation. The grain size was reduced from 214 nm to 74 nm by changing the SPS parameters. Impedance Spectroscopy revealed diffuse ferroelectric-paraelectric phase transitions and low dielectric permittivity values (<1000) at the Curie temperature (T-C around 280 K) in all sintered ceramics. The reduction in grain size led to a gradual decrease in dielectric constant, tunability, polarization, and storage energy properties. Raman spectroscopy identified the presence of polar nanoclusters above T-C. The observed properties of Ba0.6Sr0.4TiO3 nanostructured ceramics were attributed to the interplay between grain size reduction, the role of low-permittivity grain boundaries, and the diffuse nature of the ferroelectric-to-paraelectric transformation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Charles Manierea, Joseph Sambasene Diatta, Christophe Couder, Christelle Harnois, Sylvain Marinel
Summary: This study proposes a combined master sintering curve and regression method to determine all sintering model parameters. It introduces the original method of estimating the grain size curve and its impact on the densification kinetics at the final stage. The results show good agreement between the model and experimental data points.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Dariusz Bochenek, Przemyslaw Niemiec, Grzegorz Dercz, Artur Chrobak
Summary: This study elaborates on the technology of multiferroic ceramic composites sintered by the spark plasma sintering method and presents their structural, microstructural, dielectric, ferroelectric and magnetic characteristics. The results show that the composite materials have high permittivity and small dielectric loss tangent, properly saturated ferroelectric polarization, and typical magnetic properties of ferroelectro-ferromagnetic composites. The spark plasma sintering method improves the sinterability of the material, maintains high performance parameters, and significantly reduces the processing temperature and time of the composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Rubia Hassan, Kantesh Balani
Summary: The sintering mechanisms of ZrB2 and SiC-reinforced ZrB2 ceramic composites were investigated by determining the activation energy of densification in different temperature ranges. The results showed that the addition of SiC changed the prominent densification mechanism and impacted the mechanical performance with systemic increase of sintering temperature.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Ceramics
V Sandu, G. Aldica, M. A. Grigoroscuta, M. Burdusel, I Pasuk, Y. C. Ching, A. M. Ionescu, P. Badica
Summary: In this study, polycrystalline MgB2 bulk samples were produced using ex-situ spark plasma sintering (SPS) with poly(dimethylsilane) as a source for carbon doping and sintering aid. Two major effects were observed: enhanced densification kinetics during sintering for all compositions tested, and improved high field critical current density with a certain level of poly(dimethylsilane) addition.
CERAMICS INTERNATIONAL
(2022)
Article
Microscopy
K. Baranidharan, S. Thirumalai Kumaran, M. Uthayakumar, P. Parameswaran, D. Arvindha Babu
Summary: The present study focuses on the microstructural evolution of 316 stainless steel with 10 wt% of B4C samples sintered at temperatures of 800, 900, and 1000 degrees C using the Spark Plasma Sintering method. The results show that the samples sintered at 900 degrees C have a higher degree of recrystallization compared to those sintered at 800 and 1000 degrees C. This can be explained by the increase in carbon content, which reduces grain boundaries and decreases the migration rate of twin boundary generation. The experimental investigation suggests that the samples sintered at 900 degrees C have a more favorable microstructure analysis.
Article
Materials Science, Multidisciplinary
Ruizhi Chen, Su Zheng, Rui Zhou, Bangzheng Wei, Guang Yang, Pengqi Chen, Jigui Cheng
Summary: The study investigates the use of high-entropy alloys as a novel binder to fabricate cemented carbides, resulting in higher hardness and finer grain size compared to traditional cemented carbides with cobalt as binder. HEA shows potential to replace conventional cobalt as a new binder in industrial applications.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Sebastian Diaz-de-la-Torre, Isaac Munoz-Juarez, Jose C. Mendez-Garcia, Gisela Gonzalez-Corral, Mariano Casas-Luna, Edgar B. Montufar, Carolina Oliver-Urrutia, Maria Cristina Pina-Barba, Ladislav Celko
Summary: This study investigates the possibility of manufacturing dense and nanocrystalline hydroxyapatite (HA) large monoliths using spark plasma extrusion (SPE). The results show that binder-free extrusion of pre-compacted HA powder is feasible at temperatures similar to those at which nanocrystalline HA exhibits superplastic behavior. The extrusion process involves sliding, rotation, and grain boundary sliding of particles to produce monoliths with specific dimensions and alignment. The dehydration and smooth surface of the powder are important factors for facilitating additive-free HA extrusion. The extruded HA preserves its stoichiometry, nanometric grain size, and preferential microstructural alignment.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Materials Science, Ceramics
Xing Jin, Chenjun Tang, Qinggui Li, Dong Wang, Xiang Ding, Songlin Ran
Summary: Nearly fully dense B4C-VB2 composite ceramics were prepared by reactive spark plasma sintering (SPS) technology, and the effects of the degassing time on the microstructure and mechanical properties were investigated. The optimal degassing time of 6 min resulted in excellent comprehensive performance of the final product.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Condensed Matter
A. Jbeli, N. Zeiri, N. Yahyaoui, P. Baser, M. Said
Summary: The electronic and optical properties of CdSe/ZnSe semiconductor core/shell quantum dots with hydrogenic donor impurity were investigated theoretically. The perturbation and variational methods were used to calculate the binding energy, photoionization cross-section, polarizability, and diamagnetic susceptibility of the excited impurity under various conditions. A significant stark shift in the binding energy was observed under the influence of an external electric field.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Rahat Batool, Tariq Mahmood, Sajid Mahmood, Abdul Aziz Bhatti
Summary: This study investigates the effects of alkali metal doping (Na, K, Cs) on MAPbI3 through compositional engineering. The results show that doping Na, K, and Cs can improve the phase stability, thermodynamic stability, and optical absorption of MAPbI3.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
N. A. N. M. Nor, M. A. H. Razali, W. H. A. W. K. Annuar, N. N. Alam, F. N. Sazman, N. H. M. Zaki, A. S. Kamisan, A. I. Kamisan, M. H. Samat, A. M. M. Ali, O. H. Hassan, B. U. Haq, M. Z. A. Yahya, M. F. M. Taib
Summary: This study investigates the potential of quaternary chalcogenides semiconductors as thin film solar cell absorbers using density functional theory (DFT) and density functional theory plus Hubbard U (DFT + U) approach. The results show that by applying Hubbard U terms, the electronic band gaps can be accurately predicted, providing valuable insights for finding cost-effective new thin film solar cell materials.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Ashwani Kumar, Anuj Kumar, Mohaseen S. Tamboli, Mohd Ubaidullah, J. Jayarubi, S. K. Tripathi
Summary: In this study, lead-based perovskite solar cells are replaced by bismuth-based perovskite cells to overcome their instability and toxicity. CsBi3I10 perovskite films are fabricated using a modified drop-casting process, and the effects of post-annealing temperature on the morphological, structural, and optical properties are investigated. The photovoltaic performance of the cells without a hole transport layer is also quantitatively evaluated.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yang Gao, Shu-Ming Chen, Shuo Cao, Shang-Zhou Zhang, Philippe Djemia, Qing-Miao Hu
Summary: This study investigates the phase stability, elastic modulus, and hardness of ternary nitride Ti1-xAlxN. It is found that the hardness increases with the Al content x. The cubic B1 structure is more stable for x < about 0.75, while the hexagonal structure (B4) is more stable for x > about 0.75. The composition dependent hardness and phase decomposition contribute to the convex shaped hardness curve of Ti1-xAlxN.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Fengqi Wang, Qinyan Ye, Xulin He, Kun Luo, Xiaolong Ran, Xingping Zheng, Cheng Liao, Ru Li
Summary: This report uses rigorous calculations based on density functional theory to study the piezoelectric and elastic properties of wurtzite aluminum nitride (w-AlN) with single- and co-alloying by Hf (or Zr) and Sc. The research finds that the (HfSc)0.375Al0.625N and (ZrSc)0.375Al0.625N with stable wurtzite phase have a large piezoelectric coefficient d33 of 49.18 pC/N and 47.00 pC/N, respectively. However, the piezoelectric voltage constant g33 and electromechanical coupling constant k233 of HfAlN, ZrAlN, HfScAlN, and ZrScAlN are smaller than that of ScAlN, which is attributed to the large dielectric constant epsilon 33 of Hf (or Zr) alloying samples. Furthermore, the calculations of internal parameter u and bond angle alpha elucidate the brittle-to-ductile transformation in alloying w-AlN crystal structure. Electronic structure calculations show that the bandgap decreases almost linearly with the increase of alloying concentration, and the Hf (or Zr) alloying compounds become n-type semiconductors due to the existing high-charge states.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
S. R. Athul, K. Arun, S. Swathi, U. D. Remya, Andrea Dzubinska, Marian Reiffers, Nagalakshmi Ramamoorthi
Summary: The magnetic and magnetocaloric characteristics of Ho6FeSb2 have been studied. The compound exhibits two second-order ferromagnetic transitions, enabling hysteresis-free magnetocaloric effect across a wide temperature range. The alloy has high relative cooling power and magnetoresistance, making it suitable for hysteresis-free magnetocaloric applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: A polycrystalline double perovskite La2CoMnO6 sample was prepared and its structural, dielectric and magnetic properties were investigated. The sample exhibited complex structures and magnetic behavior, and showed good conductivity and dielectric performance. Its multi-domain magnetic structure suggests its suitability for memory device applications.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Shubha Dubey, Jisha A. Abraham, Kumud Dubey, Vineet Sahu, Anchit Modi, G. Pagare, N. K. Gaur
Summary: This study investigates the optoelectronic, thermodynamic, thermoelectric, and mechanical stability properties of RhTiP Half Heusler semiconductors. The results show that RhTiP is a non-magnetic material with confirmed mechanical stability. It is found to be an indirect-bandgap semiconductor with a good Seebeck coefficient. This study suggests that RhTiP has promising applications in the thermoelectric and optoelectronic fields.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Xun Xie, Jiong-Ju Hao, Hong-Wei Yang
Summary: This work presents a multilayer film structure that uses optical resonance to prepare highly efficient and saturated red, green, and blue transmittance colors. Numerical simulations and analysis show that the structure can produce R, G, and B colors with a purity comparable to standard RGB colors, while maintaining efficient transmission efficiency and obtaining a rich variety of structural colors. Additionally, a metallic interlayer is introduced to selectively suppress resonances in the short-wavelength region, improving the purity of the red color. The study also investigates the effect of the incidence angle on color purity and transmission efficiency.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Yueqiang Zhao
Summary: Solubility property is of great interest in chemical, physical, pharmaceutical, material, and environmental sciences. Understanding the intrinsic reason behind solubility behavior is a fascinating task. The theoretical relation between binary mutual solubility and liquid-liquid interfacial tension has been derived, where the partitioning of solute molecules between two coexisting liquid phases is determined by the transfer free energy per unit segment for a chain-like solute molecule expressed in terms of solute-solvent interfacial tension. This general theory of solubility is in good agreement with experimental results for binary mutual solubility and molar transfer free energy of solute molecules.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Osama K. M. Bashiar, R. E. Kroon, H. C. Swart, R. A. Harris
Summary: ZnO thin films with near-infrared emission were successfully fabricated using pulsed laser deposition under vacuum conditions, without the need for additional gases or implantation methods. The NIR emission was hypothesized to be caused by defects in the ZnO film due to high energy particle impacts on the sample surface.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
O. Stognei, A. Berezutskii, I. Anisimov, A. Deryabin
Summary: The influence of ZrOn matrix stoichiometry on the electrical and magnetoresistive properties of Fe-Zr-O nanocomposites has been studied. It was found that the magnetoresistive effect is not observed in composites with oxygen lack, while composites with oxygen excess show magnetoresistive effect and increased resistivity. Magnetoresistivity in composites with oxygen lack only appears after heat treatment. These results can be explained by the difference in the density of localized states in the oxide matrix of the composites and the ratio between two types of conductivity.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
Mehmet Bayirli, Aykut Ilgaz, Orhan Zeybek
Summary: The present study aims to understand the relationship between impedance characteristics and fractal behaviors. By producing neat and carbon nanotube doped composite specimens, the researchers investigated the electrical properties and surface heteromorphology using Nyquist plots and fractal analysis.
PHYSICA B-CONDENSED MATTER
(2024)
Article
Physics, Condensed Matter
M. I. Khan, Saddam Hussain, Muhamad Saleem, Fatimah Mohammed Alzahrani, Muhammad Siddique, M. S. Hassan, Allah Ditta Khalid, Munawar Iqbal
Summary: The sol-gel method was used to deposit Ti-doped MAPbBr3 films on FTO-glass substrates with different doping ratios (0%, 4%, and 6%). XRD analysis confirmed the cubic structure of all films, and the 4% Ti-doped film exhibited a large grain size, low band gap energy, and high refractive index. Solar cells fabricated using the 4% Ti-doped MAPbBr3 film showed improved performance in terms of current density, open circuit voltage, fill factor, and efficiency.
PHYSICA B-CONDENSED MATTER
(2024)