Article
Materials Science, Ceramics
Nilanjana Shasmal, Andrea Simone Stucchi de Camargo, Ana Candida Martins Rodrigues
Summary: This study investigated the effect of heat treatment on the spectroscopic properties of borosilicate glasses doped with ZnSe quantum dots (QDs) and co-doped with Er3+/ZnSe. TEM analysis revealed the gradual growth of ZnSe QDs during heat treatment. The emission intensity of ZnSe-doped glasses initially increased due to the formation and development of ZnSe QDs, but gradually decreased as non-radiative loss between enlarged particles became dominant. The co-doped glasses showed enhanced emission up to 20 hours of heat treatment, indicating energy transfer from QDs to Er3+ ions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Optics
Pia Fuertjes, Jens W. Tomm, Uwe Griebner, Guenter Steinmeyer, Stanislav S. Balabanov, Evgenii M. Gavrishchuk, Thomas Elsaesser
Summary: The transfer of electronic excitations from Cr2+ to Fe2+ ions in co-doped epitaxially grown ZnSe was studied by time-resolved photoluminescence spectroscopy, revealing a rapid 60 ns energy transfer buildup and a 0.95 nm Cr2+-Fe2+ distance.
Article
Materials Science, Ceramics
M. Dimitrova, Y. Ivanova, S. Vassilev
Summary: In this study, we investigated the effect of ion-exchange introduced copper ions on the photoluminescence properties of modified float glass. Copper nanoparticles were formed directly on the glass surface without reducing agents. The presence of copper colloidal particles was confirmed by the absorption peak observed at 560 nm in the UV-VIS spectra. Photoluminescence emission and excitation spectra typical for Cu+ ions were obtained. The emergence and displacement of emission spectra were found to be dependent on temperature, processing time, additional treatment, and Cu+ concentration. X-ray diffraction analysis and scanning electron microscopy were utilized to determine the crystalline phases and morphological features on the glass surface.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Liandong Guo, Ting Li, Chunchun Zhu, Wenchao Liang, Lina Wu
Summary: Bi3+ and Eu3+ co-doped CaZnOS phosphors were synthesized, and their emission characteristics were investigated. The tunable emission chromaticity from cyan to red was achieved by regulating the proportion of Eu3+ in the phosphors. Moreover, the optimized concentrations of Bi3+ and Eu3+ in CaZnOS phosphors showed potential application in white light emitting diodes (W-LEDs).
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Pengcheng Wang, Wei Zhang, Shi-Qing Man
Summary: This study focuses on the preparation and properties of Tm3+/Dy3+ single and co-doped SrO-MgO-B2O3 (SMB) glasses. Differential scanning calorimetry (DSC) was used to determine the thermal stability of the glass. X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy were utilized to analyze the structure and vibrations of the glasses. The results show that the glasses have high transmittance and can be efficiently excited by near-ultraviolet (NUV) light. The co-doped glasses can achieve tunable emission from blue light to cool white and warm white light.
CERAMICS INTERNATIONAL
(2023)
Review
Optics
E. V. Guimaraes, A. S. Silva, G. A. Azevedo, N. O. Dantas, R. S. Silva
Summary: The internal energy transfer phenomenon in Bi2S3 nanocrystals with Co-doping has been experimentally observed. The changes in optical absorption and photoluminescence spectra are related to the symmetrical environment of the Co ions.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Multidisciplinary
Chaochao Wang, Zhichao Liu, Alexey Nikolaevich Yakovlev, Tingting Hu, Tatiana Grigorievna Cherkasova, Xiaodie Zhu, Ya Liu, Jian Zhang, Daiyuan Liu, Xue Yu
Summary: This study demonstrates a trap-controlled mechano-luminescence (ML) phosphor of SrGa2O4:Tb3+ (SGO:Tb3+) with an adjustable ML color. By co-doping with Dy3+ and Eu3+ ions, the relationship between ML and thermoluminescence (TL) is verified, allowing for the manipulation of the constructed traps. The multicolor ML phosphor is employed in creating encrypted anticounterfeiting patterns.
Article
Nanoscience & Nanotechnology
Hongyue Wang, Jialiang Gao, Miao Zhang, Peng Liu, Yangyang Guo, Huixin Li, Guanguan Zhao, Siliang Hu, Zeyi Cheng, Jianyang Zang, Ruijuan Wen, Taihong Liu, Yu Tong, Zhenhua Sun, Hongqiang Wang
Summary: This work systematically investigates the spectroscopic properties of Mn2+-doped ZnSe/ZnS core-shell quantum dots (QDs). It is found that increasing the doping concentration can enhance the photoluminescence quantum yield (PL QY) of the Mn2+ dopant, but excessive doping leads to the magnetic coupling of Mn2+ ions, resulting in abnormal variations in the photoluminescence intensity and linewidth with temperature.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Nilanjana Shasmal, Walter Jose Gomes Juste Faria, Andrea Simone Stucchi de Camargo, Ana Candida Martins Rodrigues
Summary: Borosilicate glass samples singly- and co-doped with Er3+ and ZnSe were obtained via the melt quenching technique, revealing the formation of ZnSe NPs during glass preparation. Optical properties of the glasses were characterized by absorption bands, optical band gap values, and excitation spectra, showing energy transfer from ZnSe NPs to Er3+. The emitted light color and intensity were found to change with variations in excitation slit width in the co-doped glasses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
S. A. M. Abdel-Hameed, M. A. Ouis
Summary: A set of mica glasses containing copper ions were synthesized using melt quenching technique. These glasses exhibited transparent, nano-sized crystal and optical properties, making them suitable for various applications.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Physical
Valter Kiisk, Michal Novotny, Margus Kodu, Siim Pikker, Tea Avarmaa, Jan Remsa, Jan Lancok, Martin Vrnata, Raivo Jaaniso
Summary: Many research activities focus on functional luminescent materials based on metal oxides and trivalent rare earth ions. Specific applications require optimizing material preparation, annealing, and excitation-detection techniques. In this study, pulsed laser deposition was used to obtain thin TiO2 films containing 1 at% of samarium or neodymium impurity ions. The effects of pulsed laser annealing on their structure and luminescent properties were investigated.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
R. Ramaraghavulu, K. Pavani, P. C. Nagajyothi, Jaesool Shim
Summary: Potassium zinc borophosphate (KZnBP) glasses doped with Dy3+, Eu3+, and Dy3+/Eu3+ ions were prepared using the melt-quench technique, and their photoluminescence characteristics were studied. The energy transfer process between Dy3+ and Eu3+ was investigated, showing that there was a significant decrease in Dy3+ peak intensity and a simultaneous enhancement in Eu3+ peak intensity when excited with Dy3+ excitations. The dipole-dipole interaction was found to be responsible for the energy transfer from Dy3+ to Eu3+. The co-doped glasses exhibited white light emission, indicating their potential application in warm white LEDs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Mirko Vanzan, Tiziana Cesca, Boris Kalinic, Chiara Maurizio, Giovanni Mattei, Stefano Corni
Summary: Rare-earth ions sensitization is a relevant topic in modern technologies, and noble metal nanoclusters can effectively enhance lanthanide photoluminescence. Experimental works have shown the importance of nanocluster size and composition in this process. By studying the optoelectronic features of metal clusters and their interaction with defects in the silica matrix, new insights can be gained for designing rare-earth ion sensitizers.
Article
Chemistry, Physical
Sheetal Kumari, A. S. Rao, R. K. Sinha
Summary: This study investigated the structure, morphology, optical and spectroscopic characteristics of Sm3+/Eu3+ co-doped Sr9Y2W4O24 phosphors. It was found that the addition of Eu3+ ions increased the emission intensity while decreasing the emission intensity of Sm3+ ions, and the energy transfer mechanism from Sm3+ to Eu3+ ions was revealed. With increasing concentration of Eu3+ ions, the calculated CIE parameters gradually shifted towards the red region, and the phosphor exhibited good thermal stability.
JOURNAL OF MOLECULAR STRUCTURE
(2024)
Article
Chemistry, Inorganic & Nuclear
Guojian Chen, Qian Wu, Quan Zhang, Laihui Luo, Weiping Li, Peng Du
Summary: Eu2+-activated Sr8Si4O12Cl8 cyan-emitting phosphors were designed to solve the problems of low luminescence efficiency and thermal quenching. The resultant phosphors exhibited a dazzling cyan emission when excited at 387 nm, with maximum intensity achieved at a Eu2+ content of 4 mol%. The phosphors also demonstrated zero-thermal quenching luminescence, maintaining 106% of their starting value even at a temperature of 503 K. The synthesized phosphors showed potential for applications in full spectrum white-LEDs, field-emission displays, and anti-counterfeiting.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Ceramics
Tiehao Zhang, Zhanmeng Zhang, Jianjun Han, Jing Wang, Chao Liu, Jian Ruan
Summary: Transparent lithium aluminosilicate glass-ceramics with nucleating agents of P2O5 and ZrO2 were prepared and their properties were investigated. The addition of a small amount of P2O5 improved the glass network structure and facilitated the conversion of Li2SiO3 to Li2Si2O5. The glass-ceramics exhibited high transmittance with the main crystalline phases of LiAlSi4O10 and Li2Si2O5. Chemical strengthening with NaNO3 and KNO3 resulted in enhanced hardness and fracture toughness.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Hanyi Liu, Jing Wang, Luyao Li, Chao Liu, Jian Ruan, Jianjun Han
Summary: In this study, Pb1-xSrxSe quantum dots were successfully prepared in LAS glass-ceramics using conventional melt-quenching method, exhibiting near-infrared photoluminescence and photodarkening properties. The absorption and PL peak wavelengths blue-shift as SrO concentration increases, attributed to an increasing bandgap by incorporation of Sr2+ ions. Pb1-xSrxSe quantum dots embedded in LAS glass with 2.0 mol % SrO demonstrate the highest photoluminescence quantum yield.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Engineering, Environmental
Wenchao Zhang, Ying Ye, Yuzhou Hu, Kai Li, Chao Liu
Summary: Cesium lead halide perovskite nanocrystals have unique optoelectronic properties and are widely used in various fields. Embedding them into glass matrices enhances their thermal and chemical stabilities. However, these nanocrystals are still sensitive to intense light irradiation, which limits their applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Suliman Eltayeb Elhadi, Chao Liu, Hamza Adam Haroon
Summary: The successful synthesis of europium-gadolinium co-doped titanium dioxide luminescence thin films using the sol-gel dip-coating method followed by thermal annealing was studied. The higher Eu3+ ions concentration affected the structure and optical properties of the thin films, which were characterized using various techniques. The thin films showed intense red and orange-red emission from Eu3+ ions and a reduction in the optical bandgap energy with increasing Eu3+ ion concentration.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Ceramics
Sihao Wang, Yunlan Guo, Chao Liu
Summary: Photo-catalytic active glass-ceramics hold great potential for addressing environmental issues and offer advantages compared to traditional photo-catalysts. The photo-catalytic properties of these glass-ceramics depend on the presence of photo-catalytic nanocrystals embedded within. Zn2TiO4, a stable intermediate phase of the TiO2-ZnO system, exhibits comparable photo-catalytic activities as traditional photo-catalysts TiO2 and ZnO. In this study, colorless and highly transparent glass-ceramics containing Zn2TiO4 nanocrystals were successfully prepared and their effects on microstructure, mechanical properties, photo-catalytic activities, and recyclability were investigated. The embedded Zn2TiO4 nanocrystals were found to be photo-catalytically active and efficient in degrading organic dyes, suggesting promising applications in organic pollutant degradation for glass-ceramics containing photo-catalytic nanocrystals.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Wenkai Gao, Jicheng Zhang, Chenjie Ji, Luyao Li, Jing Wang, Chao Liu, Jian Ruan, Jianjun Han
Summary: ZnO-(100-x) B2O3 (x = 45-64 mol%) glass-ceramics for ULTCC applications were prepared and studied for their crystallization behavior, sintering mechanism, microstructure and microwave dielectric properties. It was found that zinc boron binary glasses can be formed in the range of 45-73 mol% ZnO content, with 55 mol% ZnO content showing the highest glass-forming ability. The formation of Zn4B6O13 crystal in the glass at a lower temperature than in ceramics, along with the refinement of secondary structure, improved the microwave dielectric properties. The 55 ZnO -45 B2O3 glass-ceramic sintered at 640 degrees C for 5 h exhibited the optimum microwave dielectric properties, as well as high Vickers hardness and good chemical compatibility with Ag or Al electrode, making it a good candidate for ULTCC substrate materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Kai Li, Wenchao Zhang, Luyue Niu, Ying Ye, Jing Ren, Chao Liu
Summary: In this study, inorganic lead-free cesium manganese halide nanocrystals embedded glasses were synthesized for the first time. These glasses exhibited red photoluminescence with broad PL band, tunable photoluminescence from red to green, and outstanding long-term stabilities. Moreover, they also showed highly efficient radioluminescence and stability against high energy irradiation, making them promising for applications in light-emitting diodes and scintillators.
Article
Chemistry, Physical
Rongqing Jiang, Hanwei Wu, Danilo Manzani, Wenchao Zhang, Chao Liu
Summary: In this study, CdSe quantum dots (QDs) with tunable and narrow band intrinsic photoluminescence (PL) were precipitated in silicate glasses by adjusting the heat-treatment temperatures. Analysis revealed that the changes in PL properties were induced by the transformation of surface defects during heat-treatment. The relationship between surface defects and PL properties of CdSe QDs was uncovered, which facilitates their applications in LEDs, backlight displays, and lasers.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Wenchao Zhang, Jingjing Liu, Chao Liu
Summary: Lead sulfide quantum dots (PbS QDs) show unique performance in the near-infrared (NIR) range and can be in-situ precipitated in glass to improve stability and be compatible with silicon photonics. The absorption cross sections of PbS QDs at 1040 nm are found to be 4-13 x 10(-16) cm(2), with bi-and tri-exciton lifetimes of -60 and -10 ps, respectively. Furthermore, the study demonstrates broadband net gain in the 1500-1600 nm range and achieves a maximum gain time of around 20 ps and a gain coefficient of > 120 cm(-1) in single PbS QDs embedded glass. These findings are important for applications in fiber amplifiers, NIR lasers, and high-capacity telecommunication.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Juan Liu, Jingjing Liu, Wenchao Zhang, Kai Li, Chao Liu
Summary: Lead chalcogenide quantum dots with controlled composition, size, and optical properties are obtained in glasses through precipitation and thermal treatment. The addition of chalcogen elements in the glasses and the adjustment of heat-treatment conditions enable modulation of the properties of PbSexS1-x quantum dots. Increasing the concentration of S in the glasses reduces the relative fraction of Se in the quantum dots, while higher heat-treatment temperatures promote the enrichment of Se in the quantum dots. These alloyed quantum dots exhibit improved photoluminescence quantum yields and enhanced resistance to thermal quenching.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Jingjing Liu, Jiahui Wei, Chao Liu
Summary: Cooling rate has a significant effect on the structures and properties of glasses, potentially altering their chemical, physical, and mechanical properties, as well as their crystallization behaviors. This study investigates the impact of cooling rate on the crystallization and optical properties of glasses used to precipitate semiconductor nanocrystals, using sodium zinc silicate glasses as a typical example.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Kai Li, Ying Ye, Wenchao Zhang, Yudong Zhang, Chao Liu
Summary: Environmentally friendly phosphors with narrow-band green luminescence were developed by preparing nanocrystals in glass. The addition of Zn can change the emission color and enhance the quantum yield. These materials also exhibit good thermal and chemical stabilities, making them suitable for use in solid-state lighting and backlight display applications.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Yuzhou Hu, Ying Ye, Wenchao Zhang, Kai Li, Yao Zhou, Yudong Zhang, Zhao Deng, Jianjun Han, Xiujian Zhao, Chao Liu
Summary: Precise and efficient patterning of light-emitting structures in high resolution and full-color light-emitting diodes is achieved by light-induced inverted patterning of nanocrystals in glasses for micro-light-emitting diodes. This method involves the use of ultrafast laser pulse to induce structural destruction and amorphization of nanocrystals in glasses, resulting in inverted luminescent patterns. The high-throughput patterning of micrometer-scale, thermally stable, and highly photoluminescent structures in nanocrystals embedded glass provides a novel way to fabricate high-performance and ultrahigh-resolution color conversion layers for micrometer-scale light-emitting diodes.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ying Ye, Kai Li, Luyue Niu, Jing Ren, Chao Liu
Summary: In this study, all-inorganic Cs3CdBr5 nanocrystals (NCs) were precipitated in glass with the incorporation of Mn2+. The introduction of Mn2+ acted as a nucleation agent, promoting the growth and improving the optical properties of Cs3CdBr5 NCs embedded in glass. It was found that the [MnBr4]-[MnBr4] structural units were strongly coupled in Cs3Cd1-xMnxBr5 NCs, resulting in efficient energy transfer and dual-band emission. The temperature-dependence of the emission from the [MnBr4] unit and [MnBr4]-[MnBr4] couples enabled high-sensitive temperature sensing from Cs3Cd1-xMnxBr5 NCs embedded in glasses.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Zilong Xiong, Wenzhuo Xue, Mujun Li, Feihu Tan, Yupeng Chen, Hongyu Yu
Summary: In this study, CBS glass/Al2O3 composites were developed for LTCC applications based on a CaO-B2O3-SiO2 (CBS) glass system with a high boron content. The study revealed that the softening of glass and interfacial reaction between the glass and Al2O3 were the two most important factors affecting LTCC's densification process. Real-time shrinkage rate of LTCC during sintering was successfully simulated, and it was proven that the formation of the CaAl2(BO3)O phase played a significant role in reducing glass viscosity and promoting dense structure formation. The resulting LTCC composite exhibited excellent performance for high-frequency applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Saurabh Kumar Sharma, Vinita Grover, Rakesh Shukla, Abid Hussain, Ambuj Mishra, Pawan Kumar Kulriya
Summary: In this study, the disordering caused by swift heavy ion irradiation in two different compositions of pyrochlore structures was investigated. X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy were used to analyze the samples before and after irradiation. It was found that both compositions underwent amorphization due to irradiation, with a slower rate observed in Nd1.8Zr2.2O7.1. The irradiation-induced modified track region in Nd1.8Zr2.2O7.1 consisted of defect-rich pyrochlore structure, anion-deficient fluorite structure, and amorphous domains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiabei He, Mengshan Song, Ming Yang, Miaomiao Zhu
Summary: This study investigates the influence of ion irradiation on high-entropy ceramics and finds that irradiation-induced lattice rearrangement can improve the radiation resistance of these ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yajie Yu, Shi He, Zhengang Zhang, Haihua Chen, Peipeng Jin, Binnian Zhong, Linhui Zhang, Liping Wang, Cheng Lu
Summary: Silicide ceramics, including tantalum disilicide (TaSi2), are known for their exceptional physical properties but are limited in practical applications due to their inherent brittleness at room temperature. In this study, we successfully improved the mechanical properties of TaSi2 ceramics and increased their electrical conductivity by modifying the preparation methods and sintering conditions. These findings provide valuable insights for future applications of TaSi2 and the design of advanced ceramic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jian Li, Jia Liu, Yongcui Zhang, Wei Sun, Yang Wang, Haitao Wu, Ling Li, Chuanbing Cheng, Yingying Wang, Ke Tan, Futian Liu
Summary: Microstructure design plays a crucial role in regulating the microwave dielectric properties of materials, however, the understanding of frequency temperature stability and related micromechanism remains limited. In this study, a combination of first-principles calculations and experimental observation was used to investigate the correlation among sintering behavior, crystal structure, bonding nature, and microwave dielectric properties of LnPO(4) (Ln = Eu, Pr) ceramics. The research findings systematically clarify the optimized effect and micromechanism of lanthanides on the dielectric properties of monazite ceramics, providing insights into the design and enhancement of microwave dielectric materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Wenqian Pan, Xizhen Xia, Wei Zhou, Yang Li
Summary: The study investigates the frictional and wear behaviors of carbon fiber-reinforced SiC ceramic matrix composites with different fiber orientations mating with ceramic balls. The results show that fiber orientation significantly affects the friction and wear properties of the composites. Pads with randomly arranged fibers demonstrate better friction stability and lower wear volume, potentially suitable for bearing material applications. The research also explores the factors influencing the formation of continuous tribo-film and identifies abrasive wear and oxidation wear as the dominant wear mechanisms for the friction pairs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sergey Nikolaevich Perevislov, Ilya Evgenievich Arlashkin, Valentina Leonidovna Stolyarova
Summary: This paper describes the synthesis and sintering of MAX phases in the Zr-Al-C system. Different mixtures of initial Zr/Al/C and Zr/Al/ZrC powders were used to synthesize Zr2AlC and Zr3AlC2 MAX phases. The highest content of Zr3AlC2 MAX phase was obtained using a component ratio of 1:1.5:2-51.1 vol.% of Zr/Al/ZrC powders.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Weijia Luo, Xubin Wang, Baiheng Bai, Jianli Qiao, Xingcong Chen, Yongzheng Wen, Jingbo Sun, Lingxia Li, Ji Zhou
Summary: This study successfully establishes the relationship between internal strain and dielectric loss by synthesizing and designing specific structure of tungsten bronze ceramics, and concludes that controlling internal strain can effectively reduce dielectric loss. This research is of great significance for the development of future all-ceramic non-Hermitian devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Santanu Mondal, Juan Diego Shiraishi Lombard, Sreenivasulu Gollapudi, Carolina Tallon, Jie-Fang Li, Dwight Viehland
Summary: Ultrafast high-temperature sintering (UHS) is an effective method for rapidly densifying ZrB2 powders. The final grain size increases with longer sintering duration. X-ray diffraction and energy-dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
JiaNan Wang, ZhiQiang Li, YongZheng Zhu, Yao Liang, Yan Cui, HuaLong Tao, Bo Song, Alexander Nikiforov, ZhiHua Zhang
Summary: First-principles calculations were performed to investigate the crystal structure, electronic structure, and ion diffusion of sulfur-doped Li2FeSiO4. The results showed that sulfur doping can improve the electronic conductivity and reduce the energy barrier for ion diffusion.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Xiaodi Dai, Serdar Aydin, Mert Yuecel Yardimci, Gunter Reekmans, Peter Adriaensens, Geert De Schutter
Summary: This study investigates the rheological behavior, solidification process, and nanostructure changes of sodium hydroxide-activated slag (NH-AAS) and sodium silicate-activated slag (SS-AAS) pastes over time. The results show that NH-AAS and SS-AAS release similar heat and reach a similar reaction degree at their initial setting times, but have different gel structures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yanliang Ji, Simon Becker, Zichen Lu, Alexander Mezhov, Regine von Klitzing, Schmidt Wolfram, Dietmar Stephan
Summary: This study reveals the significant influence of resting time on the rheological properties of cement suspensions, which is closely related to non-absorbed polycarboxylate superplasticizers (PCEs) size variation. Adsorbed PCE during resting tends to bridge particles instead of dispersing them, leading to an increased yield stress.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yifeng Huang, Xin Wang, Yinchang Ma, Xiang Lv, Jiagang Wu
Summary: This study investigates the effect of K/Na ratio on the phase structure, ferroelectric domains, and piezoelectric properties of potassium sodium niobate (KNN)-based ceramics. It reveals that high Na+ content leads to large ferroelectric domains, while high K+ content results in local polarity heterogeneity and distinct dielectric relaxational behavior. The balanced local polarity and stress heterogeneities contribute to improved piezoelectricity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zun Xia, Yedong Rong, Hao Li, Ye Dong, Hongbo Yu, Jie Xu, Xiuhui Wang, Jinlong Yang
Summary: This study presents the synthesis of hollow MgAl2O4 particles in situ within porous ceramics, resulting in volume expansion and the formation of a hierarchical pore structure, leading to a significant improvement in compressive strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Honglong Wang, Zhiguo Sun, Faming Xia, Chenguang Yang, Xiaoguang Wang, Jintang Li, Linxu Jiang
Summary: In this study, the micro-geometry morphology variation and microstructural transformation mechanism of muscovite crystals under electron beam irradiation were explored. The results revealed the instability of the muscovite lattice under irradiation, as well as the expansion and shrinkage of the lattice with increasing dose. The study also identified changes in chemical structure and other mechanisms involved. These findings are significant for the design of radiation-resistant silicate materials and the manufacturing of electronic components used in the aerospace industry.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
