Article
Spectroscopy
P. Vinodkumar, Sitakanta Panda, G. Jaiganesh, R. K. Padhi, U. Madhusoodanan, B. S. Panigrahi
Summary: A single-component white-light emitting phosphor SrBPO5: Ce3+, Dy3+ was prepared with high color purity and thermal stability through high temperature solid state reaction. The presence of Ce3+ along with Dy3+ resulted in efficient energy transfer and enhancement of Dy3+ luminescence towards white light emission. Energy transfer and thermal stability were confirmed through various studies including temperature-dependent photoluminescence and SEM imaging.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Materials Science, Ceramics
Siling Liu, Lin Zeng, Zhou Zhao, Miao Deng, Xiaomeng Wang, Wentao Zhang
Summary: A single-component Ca3YAl3B4O15 (CYAB):Dy3+, Eu3+ phosphor was synthesized and codoped to achieve warm white emission. The results showed that the codoped samples had the standard CYAB structure without impurity phases. The dual emission of Dy3+ and Eu3+ enabled the realization of warm white light, and the correlated color temperature decreased with increased Eu3+ content. The single-component Dy3+/Eu3+ codoped CYAB phosphor has potential applications in UV excited warm white LEDs.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Youkui Zheng, Hong Li, Tongsheng Yang, Junpeng Li, Shuqing Yang, Jing Zhu
Summary: A single-phase white-emitting phosphor Bi4BPO10 (BBP):Dy3+ was synthesized via a solid-state reaction route, and it exhibits satisfactory thermostability and potential for application in solid-state white lighting sources.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Meng Kuang, Junhao Li, Jinjun Zhang, Jianhong Ding, Ziwang Zhang, Kangrong Huang, Nan Yang, Ziheng Zhang, Mingming Yang, Haiyong Ni
Summary: In this study, the effect of Dy3+ doping on the properties of ScCaBO4 phosphors was investigated, and a series of ScCaBO4:Dy3+ phosphors were prepared by solid-state reactions. The results suggest that Dy3+ concentration can reach 11% while maintaining a pure phase, and the Dy3+ luminescence shows promising performance for near-UV chip based WLEDs.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Xiaomeng Wang, Zhou Zhao, Miao Deng, Zhenrui Yang, Qiqi Wu, Wentao Zhang
Summary: The white-emitting phosphor Na5Y(MoO4)4:Dy3+, Tm3+ was prepared using the sol-combustion method, with color-tunable white emission achieved through Tm3+ codoping.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Sunggeun Shim, Woon Bae Park, Minseuk Kim, Jin-Woong Lee, Satendra Pal Singh, Kee-Sun Sohn
Summary: The novel KGaS2 phosphor host fills the cyan gap in phosphor-converted white light-emitting diodes (pc-wLEDs) with optimized composition and excellent photoluminescence properties. It performs much better under near-UV excitation compared to blue excitation, making it suitable for pc-wLED applications.
INORGANIC CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
Payal Khajuria, M. Manhas, A. K. Bedyal, Ankush Vij, H. C. Swart, Vinay Kumar
Summary: In this study, a near-UV-converted Dy3+ doped phosphor was synthesized and showed high energy transfer efficiency and color close to white light.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Anns George, Adon Jose, T. Krishnapriya, Tony Francis, Cyriac Joseph, P. R. Biju
Summary: Tunable white light-emitting Ca(2-x)Sb2O7:xDy(3+) phosphors were synthesized and their crystal structure, morphology, luminescence characteristics, and energy transfer mechanism were studied. Efficient energy transfer from the host to Dy3+ ions was observed, with the energy transfer efficiency increasing with Dy3+ ion concentration. The emission color of the phosphors can be tuned from blue to near-white in the cool correlated color temperature region, making Dy3+ doped Ca2Sb2O7 a promising candidate for solid-state lighting and display applications.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Hong Gao, Miaomiao Wang, Yifan Mao, Qingsong Zhao, Cheng Zhang, Ling Jin, Youyi Xia, Weijin Li, Kui Zhang, Haibo Zeng
Summary: Currently available encapsulating materials for WLEDs have limitations, but this study developed promising materials with two significant advantages: direct encapsulation without phosphors and reprocessing for recycling. Blue-light-emitting vitrimers (BEVs) were prepared by reacting epoxy resin with amines, showing strong blue emission and fast stress relaxation. To achieve white-light emission, a well-designed yellow component was grafted into the BEVs, resulting in white-light-emitting vitrimers (WEVs). Using WEV as an encapsulating adhesive, stable white light with CIE coordinates (0.30, 0.32) was successfully achieved for 365nm LED chips without inorganic phosphors, indicating a promising future for WLED encapsulation.
ADVANCED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Jiahao Yin, Xiaoshuai An, Liang Chen, Jing Li, Jianan Wu, Yumeng Luo, Qing Wang, Hongyu Yu, Kwai Hei Li
Summary: The study focused on monolithic integrated photodetectors (PDs) in InGaN/GaN LEDs for monitoring LED intensity fluctuations. Through simulation and experiments, it was found that placing the PD in the center of the LED resulted in a 58% increase in detected photocurrent with minimal impact on the LED emission profile compared to placing the PD at the edge. Encapsulating the LED-PD device with yellow phosphor enabled white light emission, and the on-chip PD showed similar sensing behaviors to an external Si-based photodiode. The optimal monolithic PD design offered comparable sensing capabilities, compactness, insensitivity to ambient lighting, and minimal influence on the LED emission profile, making it suitable for real-time monitoring of LED intensity in practical and scientific lighting applications.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Optics
Peiwei Lv, Zhenyang Liu, Jinxing Zhao, Zuping Xiong, Lijin Wang, Xu Li, Zhaosheng Qian, Aiwei Tang
Summary: In this study, solution-processed light-emitting diodes (LEDs) based on aggregation-induced emission (AIE) molecules and cadmium-free semiconductor nanocrystals were successfully realized for the first time. The environmentally friendly white-light-emitting diodes (WLEDs) achieved a high color rendering index and luminance after systematic optimization. This research provides a new approach for the realization of AIE-based WLEDs through solution processing.
PHOTONICS RESEARCH
(2022)
Article
Materials Science, Ceramics
Kailei Lu, Wenhan Han, Gang Cheng, Xinghua Zhu, Shirui Li, Hao Guo, Bosen Gu, Yucheng Ye, Jianqi Qi, Tiecheng Lu
Summary: A series of Dy3+-doped Y2Zr2O7 transparent ceramics with high transparency and UV-excitable warm white light emission properties were prepared. These ceramics have high in-line transmittance and exhibit strong warm white light emissions under UV excitation, making them promising for light-emitting source applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Tianqing Zhang, Xiliang Jiang, Rujia Chen, Bingyan Liu, Weiling Yang, Ce Li, Hai Lin, Huisheng Liu, Chun Li, Fanming Zeng, Zhongmin Su
Summary: In this study, a narrow-band blue phosphor BaZnAl10O17:Eu2+ with excellent emission performance was discovered, which is essential for developing high-performance LCDs. The synthesized phosphor exhibits low thermal quenching behavior, with only minimal loss in emission intensity at high temperatures. The prepared white LED device using this narrow-band blue-emitting phosphor emits high-brightness white light with a wide color gamut, showing its potential application value in white light-emitting diodes.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Materials Science, Multidisciplinary
Longyun Lv, Hao Yang, Xiaohua Cheng, Yufan Lin, Xuerui Chang, Teng Cheng, Yipeng Xie, Ying Han, Juan Li, Jun Yin, Bin-Bin Cui
Summary: We synthesized a new zero-dimensional antimony-based metal halide of (NII)2SbCl5, which exhibits a broadband yellow emission under 365 nm excitation and has a photoluminescence quantum yield of over 88%. A white light emitting diode (WLED) assembled with a phosphor mixture containing the (NII)2SbCl5 phosphor shows perfect white-light with a correlated color temperature of 6071 K and a color rendering index of 81.58. This indicates that (NII)2SbCl5 is a promising yellow phosphor material for solid-state lighting.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
Feiyan Xie, Junhao Li, Dekang Xu, Hualan Xu, Shuifu Liu, Yinuan Li, Yuhong Wen, Peilan Zhang, Shengliang Zhong
Summary: White light phosphors Li3Ba2Gd3(WO4)(8):Dy3+, Tm3+ with a layered structure were prepared via high-temperature solid-reaction. These phosphors effectively suppress concentration quenching and achieve relatively high doping concentration, while also exhibiting good thermal quenching properties. They have the potential to be a single-phased white-light-emitting material for near-ultraviolet white LEDs.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Engineering, Electrical & Electronic
Deepali, Ruchira Bisi, Vandana, Harpreet Kaur, M. Jayasimhadri
Summary: The Sm3+-doped NaBaB9O15 phosphor was prepared using high-temperature solid-state reaction technique, demonstrating high purity and excellent luminescent properties suitable for various optical device applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Kaushal Jha, Amit K. Vishwakarma, Mula Jayasimhadri, Divi Haranath, Kiwan Jang
Summary: Dy3+ doped and Dy3+/Eu3+ co-doped zinc phosphate barium titanate (ZPBT) glasses were successfully synthesized using melt quenching procedure. The co-doped glasses exhibit emission peaks in various spectral regions, producing white light and orangish-red light. Tunable emission is achieved by adjusting Eu3+ concentrations and excitation wavelengths, and the co-doped glasses demonstrate strong thermal stability.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Subhajit Pradhan, Harpreet Kaur, M. Jayasimhadri
Summary: Single phase Er3+ activated Na2CaSiO4 phosphors were successfully synthesized using sol-gel technique, showing intense green emission peak at 558 nm under near-UV excitation. The optimized phosphor exhibited excellent thermal stability and temperature sensing behavior, making it promising for multifunctional optoelectronic devices.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Mukesh K. Sahu, Swati Bishnoi, G. Swati, M. Jayasimhadri, D. Haranath
Summary: The crystalline divalent manganese-activated zinc orthosilicate (Zn2SiO4:Mn2+) nanophosphor was successfully synthesized using a solution-based sol-gel process, exhibiting strong green emission under UV/blue excitation. The optimal doping concentration of Mn2+ ion was found to be 2.0 mol%, resulting in the highest green emission intensity before quenching occurred. The CIE color coordinate of Zn2SiO4:Mn2+ under UV excitation showed a bright green region with 94.3% color purity, making it suitable for high-contrast fingermark development.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Mukesh K. Sahu, M. Jayasimhadri
Summary: Crystalline eulytite-type Ca3Bi(PO4)(3) (CBP) phosphors activated with Sm3+ and combination of Sm3+ & Eu3+ ions were prepared and their optical properties, energy transfer behavior, and thermal stability were investigated. The results showed that these phosphors exhibited high emission intensity, energy transfer efficiency, and thermal stability, making them suitable for spectral conversion in optoelectronic devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Harpreet Kaur, Vishesh Tiku, Aditya Prasad, Y. Abhishek Singh, Vishnu Vikesh Jaiswal, P. Koteswara Rao, M. Jayasimhadri, D. Haranath
Summary: This study systematically explores the structural, morphological, and photoluminescence features of sol-gel derived Dy3+ doped sodium calcium silicate (Na2CaSiO4: NCS) phosphor. The results show that NCS: Dy3+ phosphors have a single-phase cubic crystal structure and exhibit pure white light emission, indicating their potential use in white LEDs.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Harpreet Kaur, M. Jayasimhadri
Summary: This article describes the synthesis and luminescent properties of Dy3+ activated and Dy3+/Eu3+ bi-activated CBV phosphor, as well as the structural and morphological characterizations. The study shows that co-doping with Eu3+ ions in CBV: Dy3+ phosphors results in warm white light emission and controllable spectral composition under different excitations. This co-doped phosphor is considered a potential candidate in lighting and display devices due to its significant accomplishments in color tunability and warm white light emission.
SOLID STATE SCIENCES
(2021)
Article
Engineering, Electrical & Electronic
Poreddy Raghupathi, Bungala Chinna Jamalaiah, Venkatramaiah Nutalapati, Mula Jayasimhadri, Harpreet Kaur, K. Pavani, Napa Madhu, Pedinti Shahab Khan
Summary: In this study, a series of LAGBPr phosphors with different concentrations of Pr3+ ions were synthesized and characterized. The optimal concentration of Pr3+ ions for efficient fluorescence was found to be 1.0 mol%. The LAGBPr1.0 phosphor showed tunable fluorescence properties and was deemed suitable for LED applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Dipti Bidwai, Yatish R. Parauha, Mukesh K. Sahu, Sanjay J. Dhoble, M. Jayasimhadri, G. Swati
Summary: A sunlight rechargeable and blue light-emitting afterglow phosphor Sr3MgSi2O8:Eu2+, Dy3+ was successfully synthesized via co-precipitation method, which exhibits an afterglow of over 30 minutes. The structural, morphological, thermal, and optical characteristics of the phosphor were investigated, revealing its high emission intensity even at elevated temperatures. The phosphor shows good color purity matching the standard for blue light, and exhibits excellent aqueous stability, making it a potential candidate for waterborne coatings, water-based paints, and security inks.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Deepali, M. Jayasimhadri
Summary: A series of yellow light-emitting Dy(3+)-doped sodium calcium metasilicate phosphors have been successfully synthesized and characterized in terms of phase identification, optical band gap determination, morphological studies, and particle size estimation. The phosphors exhibit blue and yellow emission under near UV excitation, showing high thermal stability and potential applications in optoelectronic devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Analytical
Deepali, Mula Jayasimhadri
Summary: Tb3+-doped Na4Ca4Si6O18 (NCMS:Tb3+) phosphors were successfully synthesized and characterized. The phosphors exhibited intense blue and green emission under UV excitation. The emission color could be tuned by adjusting the concentration of Tb3+ dopant.
Article
Physics, Multidisciplinary
Anamika Kem, Mohd Rehan Ansari, P. Prathap, M. Jayasimhadri, Koteswara Rao Peta
Summary: Eco-friendly stable ZnO nanoparticles were successfully synthesized using citrus limon as a chelating agent. The structural and optical properties of the nanoparticles were studied at different annealing temperatures. The results showed that the particle size increased due to agglomeration or Ostwald ripening at high temperature, and the crystallite size and bandgap also increased slightly. The emission peaks of the nanoparticles were analyzed and attributed to the near band edge emission and the transition of electrons from traps to the valence band.
Article
Chemistry, Analytical
Vikas, Mula Jayasimhadri
Summary: Telluro zinc phosphate (TZP) glasses doped with Eu3+ ions at different concentrations were prepared and their physical, structural, and luminescence properties were investigated. The study demonstrates that the red-emitting TZPE glasses have potential applications in white light-emitting diodes (w-LEDs) and other photonic devices.
Article
Chemistry, Inorganic & Nuclear
Mukesh K. Sahu, M. Jayasimhadri, D. Haranath
Summary: In this study, single phase crystalline Er3+ doped Ca3Bi(PO4)3 (CBP:Er3+) phosphors were prepared using chemical co-precipitation route. The structural, optical, morphological, and luminescent characteristics of the CBP:Er3+ phosphors were investigated, and their potential applications in optical thermometry and optoelectronic devices were explored.
SOLID STATE SCIENCES
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Divyanshi Nagpal, Tanisha Bhadauria, M. Jayasimhadri
Summary: In this study, red emitting Eu3+ activated K5BiMo4O16 (KBM: Eu3+) phosphor was successfully synthesized and characterized, showing promising luminescent properties and structural stability. The results indicate that KBM: Eu3+ phosphor has great potential for optoelectronic applications.
MATERIALS TODAY-PROCEEDINGS
(2022)
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)