Article
Materials Science, Ceramics
Dongxia Tian, Pan Chen, Xu Yang, Baojin Chu
Summary: The study demonstrates a scaling effect in BaTiO3 and Ba0.83Sr0.17TiO3 ceramics with sub-millimeter thickness, showing reduced dielectric constant, increased coercive field, and decreased piezoelectric response. This effect is possibly due to surface layers with a stabilized ferroelectric phase and higher coercive field.
CERAMICS INTERNATIONAL
(2021)
Review
Chemistry, Multidisciplinary
Yuan Liu, Yun Ji, Ya Yang
Summary: The demand for miniaturization of electronics has driven research into various nanomaterials, including lead-free Bi0.5Na0.5TiO3 (BNT) ferroelectric nanomaterials. BNT nanomaterials, with their superior properties, have found applications in energy, catalysis, and other fields. Precise control of the properties of BNT nanomaterials has led to advancements in material design and preparation techniques.
Article
Chemistry, Physical
Weipeng Lin, Manwen Yao, Jian Lin, Xi Yao
Summary: Researchers focused on exploring the potential of PbTiO3 (PT) relaxor ferroelectrics for the development of miniaturized high-precision piezoelectric devices. Partial substitution of Pb(Mg1/3Nb2/3)O3 (PMN)-PT with Pb(Ni1/3Nb2/3)O3 (PNN)-PT was found to improve dielectric and piezoelectric properties. However, the factors underlying the performance improvement of the PNN-PMN-PT ternary system remained unclear. To address this, ceramics with different PT content were fabricated and their crystal structure and electrical properties were investigated. The 0.128PNN-0.536PMN-0.336PT composition exhibited optimum performance, indicating its potential for applications in transducers and actuators.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Zhi-Yuan Yue, Rong-Meng Liao, Wang Luo, Na Wang, Le-Ping Miao, Heng-Yun Ye, Chao Shi
Summary: Organic-inorganic hybrid molecular ferroelectrics have attracted attention in the research of ferroelectric materials. Recently, rare hybrid bimetal molecular ferroelectrics have been explored to achieve excellent ferroelectric properties. A chiral nitrite-based hybrid bimetal molecular ferroelectric material was reported, showing a ferroelectric-paraelectric phase transition at 343 K with a spontaneous polarization of 0.52 mu C cm(-2) and a coercive field of 48 kV cm(-1). The origin of the ferroelectricity was attributed to the rapid rotation of the organic cation and slight order-disorder transition of the NO2- anion.
Article
Chemistry, Inorganic & Nuclear
G. Gil-de-Cos, M. E. Torres, C. Gonzalez-Silgo, K. Soler-Carracedo, I. R. Martin, F. Rivera-Lopez, S. Rodriguez-Rodriguez
Summary: Powder samples of La2-xErx(MoO4)(3) series were prepared, and the correlation between ferroelectric properties and crystal structure was studied. Contrary to expectations, increasing Er3+ concentration enhanced the ferroelectric properties and increased the Curie temperature. This series exhibited a wider tuning range for ferroelectric properties compared to rare earth trimolybdates.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Wenying Fan, Xiangping Jiang, Xiaokun Huang, Xin Nie, Chao Chen, Jiajun Yuan
Summary: BBIT:x(NC) intergrowth bismuth layer-structured piezoelectric ceramics with enhanced properties were synthesized through traditional solid-state reaction. The ceramics exhibited a single intergrowth structure with enhanced electrical properties due to Na/Ce co-doping, and showed good thermal stability after annealing. These findings suggest that BBIT: 0.3(NC) ceramics may be a promising candidate for high-temperature piezoelectric applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Ruibin Xiong, Min Liang, Lingfei Lv, Zeyuan Hou, Zujian Wang, Xiaoming Yang, Rongbing Su, Ying Liu, Xifa Long, Chao He
Summary: This study investigates the thermal expansion characteristics of PMN-PT and PIN-PMN-PT crystals and finds that they have similar thermal expansion coefficients in different directions. The thermal expansion coefficients of these crystals are lower compared to certain commercial crystals, and they demonstrate unusual behavior around the phase transition temperature.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2024)
Article
Chemistry, Physical
Manoj Kumar, Gyaneshwar Sharma, S. D. Kaushik, Arun Kumar Singh, Sanjeev Kumar
Summary: This study investigated the critical behavior of relaxor PLZT 9/65/35 to understand the impact of Polar Nano Regions (PNRs) on electrocaloric effect (ECE) and energy storage properties through dielectric spectroscopy. The findings suggest that the polar activity associated with PNRs differs from typical polar domains and plays a crucial role in energy storage applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Gianni Ferrero, Konstantin Astafiev, Erling Ringgaard, Leonardo Soares de Oliveira, Bhaskar Reddy Sudireddy, Astri Bjornetun Haugen, Katarina Ziberna, Barbara Malic, Tadej Rojac
Summary: It is found that using BaTiO3 as seed particles does not promote the formation of the 0.67BiFeO3-0.33BaTiO3 phase and instead leads to an inhomogeneous structure. However, this processing route allows for the tuning of the piezoelectric response of 0.67BiFeO3-0.33BaTiO3.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
M. V. Talanov, A. A. Pavelko, L. S. Kamzina
Summary: Cadmium niobate Cd2Nb2O7 is a rare example of a bulk ferroelectric with a pyrochlore structure, exhibiting complex phase diagram and contradictions in structural phase transitions and polar states. Studies show that its dielectric behavior demonstrates typical features of domain-wall freezing dynamics, expanding the limited family of ferroelectrics exhibiting this phenomenon.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Physical
Sachin Pal, Rajamani Nagarajan, Sitharaman Uma
Summary: We prepared two noncentrosymmetric n = 2 Dion-Jacobson (DJ) perovskite materials, A ' SmNb2O7 (A ' = Rb, Cs), by high-temperature solid-state reactions, expanding the polar n = 2 DJ series as A ' ANb(2)O(7) (A ' = Rb, Cs; A = La, Pr, Nd, Sm, Bi). Structural analysis confirmed that A ' SmNb2O7 is a polar orthorhombic material. Ferroelectric switching of A ' SmNb2O7 was demonstrated at room temperature.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Zhengfa Li, Xin Han, Yongxiang Li, H. L. W. Chan
Summary: The ferroelectric phase R3c was discovered in dense sodium niobate NaNbO3 ceramic sintered by a two-step method, rather than the antiferroelectric phase Pbcm, with small grain size observed. The relationship of phase transitions, domain rotation, and piezoelectric coupling mechanism is crucial in achieving a stable ferroelectric state with small grain size.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Inorganic & Nuclear
Wang Luo, Na Wang, Hua-Kai Li, Ze-Jiang Xu, Yan Feng, Xiao-bin Fu, Chao Shi, Heng-Yun Ye, Le-Ping Miao
Summary: In this study, a two-dimensional (2D) Ruddlesden-Popper (RP) type hybrid perovskite ferroelastic material (TFCA)(2)CdCl4 is reported, which exhibits a critical temperature of 402 K and a spontaneous strain of 0.071. The rapid rotating motions of polar rotors lead to fast reorientation of dipoles, resulting in a large dielectric response. The study reveals that the 2D RP hybrid perovskite molecular rotor platform provides a new avenue to explore dynamic functional materials.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Valentin V. Kochervinskii, Margaret A. Gradova, Oleg V. Gradov, Andrey I. Sergeev, Anton V. Lobanov, Evgeniya L. Buryanskaya, Tatiana S. Ilina, Dmitry A. Kiselev, Inna A. Malyshkina, Gayane A. Kirakosyan
Summary: Polymer films doped with different porphyrins show variations in absorption and fluorescence spectra due to differences in the structuring and composition of the rotational isomers in the polymer chains. Crystallization of tetraphenylporphyrin (TPP) doped films involves mixtures of alpha- and gamma-phases with TGTG(-) and T(3)GT(3)G(-) conformations, respectively. The introduction of TPP during film formation leads to increased conductivity and the presence of hysteresis phenomena in local piezoelectric measurements.
Article
Chemistry, Inorganic & Nuclear
G. Gil-de-Cos, M. E. Torres, C. Gonzalez-Silgo
Summary: Polycrystalline samples of Y-2(MoO4)(3) compound were synthesized and studied by various techniques, revealing its improper ferroelectric behavior and anomalous electrical properties at high temperatures.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Kai Yao, Changrong Zhou, Jiang Wang, Yunchuan Tan, Qingning Li, Changlai Yuan, Jiwen Xu, Guanghui Rao
Summary: By regulating the relaxation temperature and introducing Sr0.85Bi0.1TiO3 into Bi0.5Na0.5TiO3 ceramics, synergistic excellent energy storage properties and fast discharge rate were achieved. Overcoming the trade-off between recoverable energy storage density/efficiency and discharge rate by reducing the hysteresis of weakly correlated polar nanoregions, large recoverable energy storage density and high efficiency were obtained.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Yunchuan Tan, Changrong Zhou, Jiang Wang, Kai Yao, Changlai Yuan, Jiwen Xu, Qingning Li, Guanghui Rao
Summary: This study investigates the real-time depolarization behavior of BiFeO3-BaTiO3 ceramics at high temperatures and reveals the origins of depolarization related to the ferroelectric-relaxor transition. The findings suggest that optimizing the phase transition temperature between the ferroelectric and relaxor phases can improve high-temperature piezoelectric performance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Wenbin Tang, Yujie Zhang, Changlai Yuan, Xiao Liu, Baohua Zhu, Liufang Meng, Changrong Zhou, Fei Liu, Jiwen Xu, Jiang Wang, Guanghui Rao
Summary: A new system of (1-x) KNbO3-xSrFeO(3-delta) (x = 0.00-0.20) was synthesized successfully via solid-state reaction, with the ability to tune the bandgap and ferroelectric properties for potential applications in ferroelectric photovoltaic and energy fields.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Electrical & Electronic
Kai Yao, Changrong Zhou, Qingning Li, Zijing Xiao, Changlai Yuan, Jiwen Xu, Guohua Chen, Guanghui Rao
Summary: The study found that B-site complex ions substitution can cause a phase transition from tetragonal to pseudocubic phase in ceramic materials, and the ferroelectric-relaxor phase transition temperature decreases with increasing dopant content. Within a certain range, increasing the content of (W0.5M0.5)(4+) can significantly enhance the strain performance of the material.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Linghao Hou, Changrong Zhou, Qingning Li, Rui Li, Changlai Yuan, Jiwen Xu, Guanghui Rao
Summary: In this study, the relaxation temperature of BNT-6BT material was adjusted to near room temperature, resulting in high dynamic polar nanoregions and moderate polar spatial correlations. The material exhibited high strain and ultra-low hysteresis, as well as excellent temperature and frequency stability.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Tianxiao Meng, Qingning Li, Changrong Zhou, Wei Li, Shuai Cheng, Changlai Yuan, Jiwen Xu, Guanghui Rao
Summary: This study optimized the output strain of ferroelectric materials by eliminating negative strain and maximizing the contribution of reversible domain switching through composition design strategy. The experimental results showed a significant enhancement in the maximum usable strain under specific compositions.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Rui Li, Changrong Zhou, Linghao Hou, Changlai Yuan, Jiwen Xu, Qingning Li, Shuai Cheng, Guanghui Rao
Summary: Lead-free electro-strain ceramics with NaNbO3 modification achieved a sprout-shaped strain loop with negligible negative strain. By composition driving incipient piezoelectricity and reversible domains switching, a significant enhancement in the maximum usable strain was realized, with excellent temperature stability.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Jinshi Li, Qingning Li, Hao Pang, Zhaozhe Yu, Dongliang Yan
Summary: The K2V3O8@GO composite material, prepared by compounding graphene oxide (GO) and layered K2V3O8 materials, exhibits stable structure and excellent conductivity, leading to improved electrochemical properties in batteries. This composite material demonstrates high specific capacity, excellent rate capability, and good cycle stability, attributed to its large specific surface area, stable structure, and excellent conductivity.
Article
Physics, Condensed Matter
Yunchuan Tan, Changrong Zhou, Jiang Wang, Di Su, Changlai Yuan, Jiwen Xu, Qingning Li, Guanghui Rao
Summary: In this study, the stability of high temperature piezoelectric properties was improved by suppressing the relaxor phase transition in 0.7BFO-0.3BT ceramics. Doping with CuO, Li2CO3, and ZnO inhibited the frequency dependency of permittivity and the degradation of piezoelectric properties.
SOLID STATE COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Mingwei Su, Qingyuan Gao, Liufang Meng, Changlai Yuan, Fei Liu, Baohua Zhu, Jingtai Zhao, Jiwen Xu, Changrong Zhou
Summary: A bandgap-tunable KNbO3 ferroelectric ceramic was prepared by introducing Bi/Co ion. The ceramic exhibited good ferroelectricity and high-field polarization ability, and showed improved performance in photovoltaic devices. Structural analysis of polarized samples revealed the effect of ferroelectric polarization on photovoltaic performance.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Jun Chen, Changrong Zhou, Kelin Chen, Qingning Li, Changlai Yuan, Jiwen Xu, Shuai Cheng, Jingtai Zhao, Guanghui Rao
Summary: This study proposes a new strategy to mitigate the conflict between the elevation of depolarization temperature (T-d) and the temperature stability of the real-time piezoelectric constant (d(33)) in Bi0.5Na0.5TiO3-based (BNT-based) piezoceramics. By integrating the pressure-assisted sintering and quenching process, both the depolarization temperature and the temperature stability of the real-time piezoelectric constant were improved in the ceramic. The built-in field and the increment of the field-induced R3c phase fraction played significant roles in enhancing the depolarization temperature and the temperature stability of the real-time piezoelectric constant.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Jun Chen, Changrong Zhou, Huihui Liu, Qingning Li, Changlai Yuan, Jiwen Xu, Jiang Wang, Jingtai Zhao, Guanghui Rao
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Tingcong Deng, Mingwei Su, Liufang Meng, Baohua Zhu, Changlai Yuan, Xiao Liu, Changrong Zhou
Summary: Ferroelectric ceramics with enhanced photovoltaic performance were prepared by utilizing conventional solid-state sintering strategies. The defect-induced bandgap intermediate state derived from the split state of Ni plays a dominant role in lowering the bandgap of KN, promoting light absorption and carrier separation. Among these ceramics, KNBNH6 shows the highest short-circuit photocurrent density (J(sc)) of 138.7 nA/cm(2) and is further enhanced to 702.9 nA/cm(2) after polarization. The polarization induced lattice distortion in KNBNH6 increases the polarity of its cells, enhancing its photovoltaic properties.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yuchen Lan, Wenbin Tang, Changlai Yuan, Xiao Gang Xue, Xiao Liu, Baohua Zhu, Liufang Meng, Changrong Zhou, Fei Liu, Jiwen Xu, Jiang Wang, Guanghui Rao
Summary: The study found that a higher depolarized electric field in ferroelectric materials can significantly increase the rate of visible light photocatalytic hydrogen evolution by promoting the separation and transportation of photogenerated carriers, thereby enhancing the photocatalytic activity of semiconducting ferroelectrics under visible light.
NEW JOURNAL OF CHEMISTRY
(2021)
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)
