Article
Materials Science, Ceramics
Shuquan Yang, Lan Zhang, Meihui Xiao, Lin Chen, Jun Sun, Jianjun Ding, Xiaoxiao Li, Yi Gong, Kang Zheng, Xian Zhang, Xingyou Tian
Summary: The h-BN/AlN/CaCO3-MgO-B2O3-SiO2-Li2CO3 glass composites, prepared by tape-casting and sintering, exhibit low dielectric loss and high thermal conductivity. The pressureless sintered composite with 3 wt% h-BN achieves a thermal conductivity of 6.55 W/(m·K) and a low dielectric loss of 7.02 x 10(-4) at 24 GHz. The hot-pressing sintered composite with 4 wt% h-BN demonstrates a higher thermal conductivity of 10.3 W/(m·K) and a lower dielectric loss of 4.77 x 10(-4). These composites show promising potential for electronic packaging and 5G communication applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Xi Zhang, Xiaoyu Han, Yuedan Zhang, Jinglong Liang, Chuang Wang, Jinsheng Liang
Summary: By optimizing the sintering parameters, Al2O3-CA6-ZrO2/Ni multi-phase composites can achieve excellent mechanical properties, including high density, hardness, and toughness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Yang Wang, Zhengbai Zhao, An Gu, Zhongqing Wei, Wangfei Chen, Chao Yan
Summary: A novel strategy to prepare boron nitride-Ni nanoparticles/epoxy resin composites with high thermal conductivity and good orientation properties was reported, achieved through the synergistic effect of magnetic field orientation and hot-pressing. The composites exhibited significant improvement in thermal conductivity and showed potential for industrial applications in electronic packaging.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Composites
Xudong Wu, Haojie Yu, Li Wang, Xingguang Meng, Zhikun Huang, Xiaowei Liu, Xiaodan Gong, Jinyi Liu
Summary: Functionalized boron nitride (BN) and magnesium oxide (MgO) hybrid fillers were synthesized and used to prepare enhanced thermal conductive epoxy (EP) composites. The covalent binding of BN and MgO reduced the interface thermal resistance effectively and hot-pressing facilitated the construction of continuous thermal conduction paths. As a result, the epoxy composite with 40 wt% hybrid fillers loading exhibited high thermal conductivity, outstanding insulating performance, and excellent thermal stability. A probable thermal conduction mechanism was proposed to explain the high thermal conductivity of the epoxy composite. This study provides a new approach to prepare epoxy composites with outstanding performances.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Ceramics
Yong Hou, Guo-Hua Zhang, Kuo-Chih Chou
Summary: The influences of different alkali metal oxides on the crystallization behavior and densification of glass ceramics were studied. Higher sintering temperatures promoted crystalline phase precipitation and transformation. Fully dense ceramics containing Na2O could be obtained through hot pressing, while those containing K2O had lower densification levels.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Xiaowei Yang, Jian Chen, Rong Xing, Aziz Babapoor
Summary: This study investigated the effects of hBN additive on the mechanical properties and microstructure of TiB2-SiC composites, showing that hBN can contribute to grain refinement and improve flexural strength. The highest Vickers hardness and flexural strength were achieved for the sample with 7 vol% hBN.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Xiumin Yao, Xiaojie Wang, Xuejian Liu, Zhengren Huang
Summary: In this study, Mesocarbon microbead-SiC (MCMB-SiC) composites with 30 wt% MCMBs were densified using a two-step hot pressing method. The pressing schedule and temperature were found to significantly affect the densification process, with lower temperatures followed by higher temperatures leading to improved relative density. The results demonstrated the effectiveness of the two-step hot pressing method in producing dense C-SiC composites with high C content.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Pan Ji, Xuefeng Lu
Summary: In experiments, it was found that the microstructure of AlN changed and thermal conductivity decreased after adding nano-carbon materials. The closer the dimension and shape of nano-carbon materials were to AlN, the better the effect of microstructural optimization. AlN reinforced by three-dimensional diamonds exhibited the highest thermal conductivity.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Materials Science, Ceramics
Kejie Wang, Rongzhen Liu, Haiman Xu
Summary: This study developed high-strength and wave-transmission silicon nitride composites using selective laser sintering (SLS) and cold isostatic pressing (CIP). The effects of CIP pressure on densification, mechanical properties, and wave-transmitting properties of the Si3N4 ceramics were investigated. Adjusting CIP pressure improved densification and mechanical properties but decreased wave-transmitting performance.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Guopeng Zhang, Qiqi Zhan, Kang Zheng, Jiaqi Tang, Bin Cai, Zhongxia Liu
Summary: AlN and equimolar ratio of gas atomized CoCrFeMnNi HEA powders were successfully used to prepare AlN-CoCrFeMnNi cermets by ball milling and hot pressing sintering. The cermets exhibited a FCCstructured CoCrFeMnNi solid solution binder phase, AlN phase, and a small amount of Cr7C3 type carbide. The resistivity of the cermets nonlinearly increased with increasing AlN content and temperature, and a conductivity model was established. The AlN-CoCrFeMnNi cermets showed a percolation threshold phenomenon, making them promising for e-cigarette applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Hai Jiang, Ning Ding, Zheng-Yu Zou, Xiao-Hong Wang, Wen-Zhong Lu
Summary: The effects of low-content addition of boron nitride nanoplatelets (BNp) on the microstructure, flexural strength, thermal and dielectric properties of AlN ceramics were studied. It was found that suitable addition of BNp can improve flexural strength while maintaining high thermal conductivity and excellent dielectric properties.
CERAMICS INTERNATIONAL
(2022)
Article
Biochemistry & Molecular Biology
Bo Cao, Xiaodan Huang, Wenxiang Zhang, Peng Wu
Summary: In this study, a fluorine-containing flow modifier was successfully synthesized and applied to fabricate electronic packaging materials with high thermal conductivity, excellent dielectric properties, processability, and toughness. The incorporation of the flow modifier improved the dispersion of fillers and interaction between components, leading to high-performance composites suitable for electronic packaging applications.
Article
Materials Science, Ceramics
Haoyi Wang, Delong Cai, Zhihua Yang, Xiaoming Duan, Bingzhu Wang, Bo Wang, Daxin Li, Dechang Jia, Yu Zhou
Summary: In this study, a boron nitride-magnesium aluminum silicate (BN-MAS) composite ceramics were fabricated using hot-press sintering at different temperatures. The relationship between sintering temperature and microstructure was investigated, showing that h-BN had a significant inhibitory effect on the crystallization of the MAS system at temperatures above 1400 degrees C. The composite sintered at 1700 degrees C exhibited the highest bending strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Yingchao Guo, Yongfeng Liang, Junpin Lin
Summary: In this study, the induction hot-pressing sintering method was used to synthesize Ti-47.7Al-7.1Nb-(V, Cr)+ xY2O3 (x = 0.05, 0.1, and 0.2 at%) composites, and the influence of Y2O3 content and sintering parameters on phase composition, microstructure evolution, and mechanical properties was investigated. The results showed that the addition of 0.05 at% nano-Y2O3 significantly refined the lamellar colonies and improved both the room-temperature and high-temperature mechanical properties.
Article
Materials Science, Ceramics
Melike Donmez, Metehan Erdogan, Cihangir Duran
Summary: The limited densification of CeO2 ceramics was improved by using an anorthite-based glass, resulting in high dielectric constant and quality factor with minimum dielectric loss. The CeO2-(anorthite-based) glass ceramic showed promising results in terms of low temperature densification and microwave properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
