Article
Materials Science, Ceramics
Yang Jin, Jinfeng Wang, Lin Jiang, Yao Yao, Yangjue Huang, Peng Chen, Wenxue Chang
Summary: This study used a two-step sintering method to refine the microstructures of lead-free 2.0 mol% Mn-doped ceramics, enhancing their energy storage performance; the two-step sintering process resulted in fine grains, significantly improving dielectric breakdown and suppressing domain wall movement; an ultrahigh charge energy storage density was achieved at 28 kV/mm with good temperature insensitivity.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Chenxiong Gao, Xiangxun Zhao, Bo Li
Summary: The addition of Y2O3 in MAS glass-ceramics enhances crystallinity and promotes the formation of Indialite, leading to adjustments in thermal expansion coefficient. Proper amounts of Y2O3 improve densification and crystal phase precipitation during the sintering process, resulting in significantly enhanced mechanical properties.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Jiajing Li, Qiang Xian, Zhen Li, Zhenyu Chen, Xuanrui Zhang, Qiaolin Chen, Hui Dan, Yi Ding, Tao Duan
Summary: A novel method using borosilicate glass as a sintering additive for synthesizing ZrSiO4 ceramics has been reported. The addition of borosilicate glass significantly affects the phase evolution and properties of the ceramics. The formation efficiency of ZrSiO4 phase was enhanced by increasing the content of borosilicate glass and sintering temperature.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Rob Atkin, Timothy B. Sercombe, Neda Ghaebi Panah
Summary: Bioactive glass scaffolds are commonly used in bone tissue engineering applications, and sintering is often employed to enhance their mechanical strength. However, sintering can lead to crystallization, resulting in reduced bioactivity and biodegradability. This study compared the in-vitro bioactivity and biodegradability of sintered 58S bioactive glass made from fully amorphous powder and partially crystalline powder with the same chemical compositions. The results showed that the sintered 58S produced from glass ceramic powder exhibited higher in-vitro bioactivity and biodegradability rate than that from fully amorphous powder. The initial structure after calcination was found to be crucial in determining the subsequent crystallization during sintering, and the presence of crystallinity and hydroxyapatite formation after calcination played important roles in increasing the bioactivity and biodegradability rate of the sintered 58S.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Marija Dunce, Eriks Birks, Maija Antonova, Liga Bikse, Sanija Dutkevica, Otto Freimanis, Maris Livins, Laura Eglite, Krisjanis Smits, Andris Sternberg
Summary: This study provides a comprehensive analysis of the microstructure and chemical composition of NBT ceramics at different sintering temperatures, revealing that with increasing sintering temperature, the grain size distribution becomes more diffuse and the average grain size increases, with two types of pores observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Chunlin Li, Xiaoshun Zhang, Yang Lu, Yiting Shan, Hongqing Zhou
Summary: The effects of Nd2O3 addition on the crystallinities, microstructures, and properties of MgO-Al2O3-SiO2 (MAS) glass-ceramics were studied. It was found that the addition of Nd2O3 allowed for complete sintering of the MAS at lower temperatures. Appropriate addition ratios increased the crystallinity and promoted the formation of Indialite, resulting in improved microstructure, reduced thermal expansion coefficient, and optimized dielectric properties. The best performance was achieved by adding 4 wt% Nd2O3 to the MAS sample and sintering at 1255 degrees C for 15 min, with a bulk density of 2.51 g cm(-3), epsilon(r) = 6.50, tan delta = 1.96 x 10(-3) (13 GHz), and CTE = 4.621 ppm degrees C-1.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
K. S. N. Vikrant, X. L. Phuah, J. Lund, Han Wang, C. S. Hellberg, N. Bernstein, W. Rheinheimer, C. M. Bishop, H. Wang, R. E. Garcia
Summary: Understanding the influence of defects in ionic ceramics at different scales is crucial for developing efficient ceramic processing operations. The flash sintering process involves multiple time and length scales, leading to various explanations that may seem contradictory. Challenges in modeling and simulating flash sintering are highlighted, particularly in relation to the microstructural evolution of ionic ceramics for advanced materials and devices.
Editorial Material
Materials Science, Multidisciplinary
Z. Y. Tan, Z. H. Xie, X. Wu, J. W. Guo, W. Zhu
Summary: High entropy A(6)B(2)O(17) ceramics with good hardness and fracture toughness are successfully prepared by solid state reaction combined with spark plasma sintering. The fracture toughness is independent of its components, but only related to its structure, and the ceramics exhibit good high temperature thermal stability.
Article
Materials Science, Ceramics
Huan Liu, Huihui Zhang, Ming Zhu, Haibo Wu, Ming Yuan, Xuejian Liu, Zhengren Huang
Summary: Highly densified Al4SiC4 ceramics with a relative density of 96.1% were prepared using 2 wt% Y2O3 as additives. The presence of Y2O3 during sintering formed a yttrium aluminate liquid phase, promoting densification and anisotropic grain growth. The resulting Al4SiC4 ceramics had a bimodal grain distribution and exhibited superior mechanical properties compared to hot pressed Al4SiC4 ceramics. Pressureless sintering of Al4SiC4 ceramics is significant for the development and practical application of large-sized and complex-shaped Al4SiC4 ceramic parts.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Chuanhui Li, Peng Li, Jianliang Zhang, Fengjuan Pei, Xingchen Gong, Wei Zhao, Bingji Yan, Hongwei Guo
Summary: This study investigated the fabrication of well densified wollastonite with smooth appearance using direct sintering method, finding that the addition of CaF2 can promote crystallization but hinder sintering ability. At higher temperatures, CaF2 acts as a flux favoring eutectic formation, leading to reduced wollastonite precipitation. High CaF2 content narrows the sintering temperature range and results in uneven surfaces in the glass-ceramics.
Article
Materials Science, Multidisciplinary
Jingyang Li, Jun Yu, Huizhong Zhao, Shaobai Sang, Han Zhang, Yu Wang
Summary: Ferro-titanium slag can improve the mechanical properties of multiphase materials and inhibit the thermal decomposition of AT ceramic. The Si4+, Fe3+, and Ti4+ ions in ferro-titanium slag can form a solid solution with the Al3+ ions in AT, while the phase reconstruction of ferro-titanium slag can further enhance the mechanical properties of AT ceramic.
Review
Acoustics
Yungang Yu, Ting Zheng, Nan Zhang, Jiagang Wu
Summary: This article discusses the effects of sintering aids on the sintering characteristics and microstructure of KNN-based ceramics, and provides reference for selecting sintering aids.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Materials Science, Ceramics
Fu Sun, Pengchao Ji, Lin Tan, Jingxin Yang, Qiang Tian, Qi Li, Site Lv, Xinghua Su
Summary: The flash-sintering behavior of Al2O3-GdAlO3-ZrO2 powders with a eutectic composition was investigated in this study. It was found that the flash-sintered bulks consisted of two distinct regions, with a eutectic microstructure observed in the channel region. The formation of the eutectic microstructure was attributed to the localized temperature increase during flash sintering. The resulting eutectic microstructure exhibited high hardness and fracture toughness.
CERAMICS INTERNATIONAL
(2022)
Article
Green & Sustainable Science & Technology
Wenxing Shang, Zhiwei Peng, Yawen Huang, Foquan Gu, Jian Zhang, Huimin Tang, Lei Yang, Weiguang Tian, Mingjun Rao, Guanghui Li, Tao Jiang
Summary: CMAS glass-ceramics, using metallurgical slags as raw materials, have potential for economic and environmental benefits. This study provided a systematic review of preparation methods, challenges, and solutions for utilizing metallurgical slags in producing CMAS glass-ceramics.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Ceramics
Qin Zou, Haotian Gu, Yanguo Li, Zhang Li, Pengjie Liang, Yongan Luo
Summary: Multicomponent transition metal boride composite-sintered bodies were prepared and characterized at different sintering temperatures. The results showed diffusion of other compounds into the TiBx phase at lower temperatures due to the nonstoichiometric ratio of TiB1.5 vacancies. Increasing sintering temperature initially enhanced Vickers hardness and fracture toughness, but further increase reduced porosity and increased grain size, leading to a decline. The best properties were obtained at 1800 degrees C.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
