CERAMICS INTERNATIONAL
·
2025
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IF 5.6
Rencong Geng,Tingye Fan,Ping Yang,Wenlei Jia,Ju Zhou,Mingwei Li,Wenhan Qi,Shiqi Li,Jiao Han,Yiming Zeng
Si 3 N 4 ceramics are highly valued for their exceptional thermal conductivity and mechanical properties. This study investigated the effects of different addition ratios of Y 2 O 3 -MgO-MgSiN 2 ternary sintering additives on liquid phase viscosity, densification, microstructure, thermal conductivity and mechanical properties. The incorporation of MgSiN 2 as sintering additives introduced additional Si and N into the liquid phase, forming a nitrogen-rich liquid phase that promoted the grain growth showing a bimodal distribution. When the MgO/MgSiN 2 ratio reached 2/3, the moderate liquid phase viscosity facilitated enhanced densification and grain growth. This resulted in an increased number of large grains, a moderate grain size distribution, and a good bimodal microstructure. Consequently, the 2M3N exhibited superior properties, including a thermal conductivity of 105.22 W m −1 K −1 , a fracture toughness of 5.91 MPa m 1 / 2 , and a bending strength of 726.12 MPa. The study demonstrates that precise control of the Y 2 O 3 -MgO-MgSiN 2 ratio can effectively regulate the microstructure, leading to improved thermal and mechanical performance.
研究领域:
材料科学
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陶瓷
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热性能
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机械工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 3
·1-12
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IF 2.8
Huang Kai,Que Tao,Guo Xiang,Wang Rui,Ding Xiang,Zhou Hongqing
The advancement of high-density integration and packaging technologies necessitates the development of packaging materials that possess enhanced thermal conductivity and substantial mechanical strength. In this paper, we present a novel type of CaO–B 2 O 3 –SiO 2 /β-Si 3 N 4 composites synthesized through the solid-state reaction. The effects of β-Si 3 N 4 ceramic content on the sinterability, phase structure, microstructure, and properties of the composites were studied. As an excellent structural and functional material, the rod-like β-Si 3 N 4 ceramic not only enhanced the thermal conductivity (λ) and flexural strength of composite materials but also effectively reduced the thermal expansion coefficient (CTE) of the composite and maintained good high-frequency dielectric properties. The composite sample containing 15wt.% β-Si 3 N 4 demonstrated exceptional performance after sintering at 850 ℃ for 30 min, achieving a bulk density of 2.80 g/cm 3 , a relative permittivity of 6.52 with a dielectric loss of 1.94 × 10 –3 (15 GHz), a λ of 3.5 W/(m·K), a CTE value of 6.40 ppm/ ℃, and a flexural strength of 180.1 MPa. Additionally, the EDS line mapping indicates that there was no diffusion of silver at the interface, thereby affirming the favorable compatibility between the composite and the silver electrode. This characteristic positions the CBS/β-Si 3 N 4 composite as a potentially promising candidate for applications in electronic packaging.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
International Journal of Applied Ceramic Technology
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2025
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IF 2.3
Binbin Fan,Wei Sun,Zunlan Hu,Dengke Zhao,Bohan Wang,Shuo Zhao,Shijia Zhang,Fei Li,Zhipeng Xie,Kexin Chen,Guanghua Liu
Si 3 N 4 ceramics with enhanced thermal conductivity and mechanical properties were prepared by using nitride sintering additives of YN and MgSiN 2 . In addition to the conventional oxide sintering additives such as Y 2 O 3 and MgO, the use of nitride sintering additives offered more possibilities for the optimization of the microstructure and properties of Si 3 N 4 ceramics. The Si 3 N 4 sample with binary nitride additives of YN‒MgSiN 2 showed a coarse-grained microstructure and the maximum thermal conductivity of 112 W m −1 K −1 after heat treatment. However, the binary nitride additives were insufficient to supply sufficient liquid phase during the sintering of Si 3 N 4 ceramics, which caused porosity and impaired the mechanical properties. A good balance between thermal conductivity and mechanical properties was achieved by using nitride-oxide hybrid sintering additives of YN‒MgO, where the Si 3 N 4 sample showed both high thermal conductivity of 109 W m⁻ 1 K⁻ 1 and good mechanical properties with flexural strength of 707 ± 7 MPa, fracture toughness of 9.5 ± 0.2 MPa m 1/2 , and Vickers hardness of 14.9 ± 1 GPa.
研究领域:
材料科学
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陶瓷工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Yi Zhou,Shun Zeng,Yingxuan Tong,Yunwei Shi,Qianglong He,Fan Zhang,Weimin Wang,Zhengyi Fu
Textured Si 3 N 4 /BN composite ceramics were successfully fabricated via hot-press sintering. The effects of h-BN content on the microstructure, mechanical properties and thermal properties were systematically investigated. The results indicate that increasing the h-BN content leads to a continuous decline in both the density and mechanical properties of Si 3 N 4 /BN composite ceramics. By further adjusting the particle size of h-BN, the textured Si 3 N 4 /BN composite ceramics incorporating 15 vol% of 8 μm h-BN exhibit high thermal conductivity (77.5 W m −1 K −1 ) and reliable mechanical properties (707.3 MPa and 8.63 MPa m 1/2 ) at low sintering temperature and short dwelling time (1750 °C for 2 h). Therefore, this textured composite ceramics design offers a novel approach for the rapid fabrication of composite ceramics with high thermal conductivity and demonstrates significant potential in the field of advanced thermal management.
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DOI
高影响因子
COMPOSITE INTERFACES
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2023
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IF 2.6
Fayu Li,Jinwei Yin,Dongxu Yao,Yongfeng Xia,Hanqin Liang,Yu-Ping Zeng
The poor wettability between the ceramic reinforcements and the metal matrix makes it difficult to realize the densification process of composites, which is severely detrimental to their mechanical properties. To improve the mechanical properties of Al matrix composites (AMCs) reinforced by β-Si3N4 whiskers (β-Si3N4w), we prepare TiN coating on the surface of β-Si3N4w via molten salt process, remarkably strengthening the interface bonding between Al matrix and β-Si3N4w. By optimizing the coating layer thickness, the bending strength of AMCs reinforced by TiN-coated β-Si3N4w reaches 439 MPa at 850°C, exhibiting remarkable enhancement relative to the composites without TiN coating (335MPa). Meanwhile, the interfacial test shows that TiN-coated β-Si3N4w is well bonded with the Al matrix, and no interfacial defects were detected. Moreover, the TiN coating with appropriate thickness can efficiently alleviate the agglomeration of β-Si3N4w, promote the densification of AMCs, and modify the Al/β-Si3N4w interface.
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2020
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IF 4.495
Yao Liu,Lina Zhan,Lei Wen,Lin Cheng,Yu He,Biao Xu,Qiumei Wu,Shaojun Liu
Due to high absorbance of UV light and low solid loading, the stereolithography-based additive manufacturing of gray-colored and dense Si 3 N 4 ceramic is of significant difficulty and challenge. The effects of geometric properties of ceramic powders on the curing performance were investigated by studying the absorption difference of the Si 3 N 4 ceramic particles with different colors and particle sizes and ultraviolet light. The results show that the transmission of ultraviolet light and curing performance of the darker Si 3 N 4 ceramic slurry are much poor. Under the same particle size, the Si 3 N 4 ceramic slurry using lighter particles presents the smaller scattering coefficient. The scattering coefficient (∼202) of the gray powder with ∼0.8 μm average particle size is the smallest. Under the same color, the larger the particle size, the smaller the scattering coefficient. The smallest scattering coefficient of the white powder with ∼2.0 μm average particle size is ∼110.
研究领域:
材料科学
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增材制造
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Nannan Zhang,Daoping Xiang
Solar cells based on crystalline silicon wafers have dominated the global photovoltaic market for many years. Unfortunately, a large amount of photovoltaic silicon waste (PSW) also was produced during the process of cutting silicon ingot into silicon wafer. The improperly discarded PSW will bring about serious environmental hazardous problems, so it is highly necessary to safely and effectively recover and utilize PSW. Here, we report self-assembled 3D Si 3 N 4 @SiO 2 nanofibre sponges utilising PSW as silicon sources for the first time. This kind of ceramic sponge displays excellent compression resilience under a maximum strain of 67% due to the flexibility of the Si 3 N 4 @SiO 2 nanofibres. The Si 3 N 4 @SiO 2 nanofibre sponges can withstand high temperatures beyond 1200 °C with negligible weight loss and demonstrates favourable thermal insulation properties. Furthermore, the porous Si 3 N 4 @SiO 2 nanofibre sponges possess ultra-low dielectric properties , with the minimum dielectric constant and dielectric loss approaching 1 and 0, respectively. In short, a simple and low-cost technology using industrial waste to fabricate versatile Si 3 N 4 @SiO 2 nanofibre sponges with prominent performance is of great significance for the development and application of 3D ceramic architectures in various industry fields including aerospace, electronic devices and thermal insulation.
研究领域:
材料科学
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环境科学
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能源工程
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 14
·2952
·
IF 4.967
Ming-Chao Han,Shun-Zhong Cai,Ji Wang,Hong-Wei He
Meltblown (MB) nonwovens as air filter materials have played an important role in protecting people from microbe infection in the COVID-19 pandemic. As the pandemic enters the third year in this current global event, it becomes more and more beneficial to develop more functional MB nonwovens with special surface selectivity as well as antibacterial activities. In this article, an antibacterial polypropylene MB nonwoven doped with nano silicon nitride (Si3N4), one of ceramic materials, was developed. With the introduction of Si3N4, both the average diameter of the fibers and the pore diameter and porosity of the nonwovens can be tailored. Moreover, the nonwovens having a single-side moisture transportation, which would be more comfortable in use for respirators or masks, was designed by imparting a hydrophobicity gradient through the single-side superhydrophobic finishing of reactive organic/inorganic silicon coprecipitation in situ. After a nano/micro structural SiO2precipitation on one side of the fabric surfaces, the contact angles were up to 161.7° from 141.0° originally. The nonwovens were evaluated on antibacterial activity, the result of which indicated that they had a high antibacterial activity when the dosage of Si3N4was 0.6 wt%. The bacteriostatic rate againstE. coliandS. aureuswas up to over 96%. Due to the nontoxicity and excellent antibacterial activity of Si3N4, this MB nonwovens are promising as a high-efficiency air filter material, particularly during the pandemic.Keywords:PP meltblown nonwoven;silicon nitrile (Si3N4);filtration;antibacterial materials;superhydrophobicity
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
Additive Manufacturing
·
2023
·
IF 11
Yitian Yang,Zhihua Yang,Xiaoming Duan,Peigang He,Delong Cai,Dechang Jia,Yu Zhou
Additive manufacturing of ceramic materials has gained the significant attention due to its ability to flexibly fabricate customizable ceramics with complex structures. However, large-size advanced ceramics are still difficult to be fabricated by additive manufacturing, especially for the thin-wall structures. Here, a strategy for fabricating large-size Si 3 N 4 ceramic via the materials extrusion process using the long-term stable hydrogel-based suspensions is reported. We establish a mechanism to analyze the rheology relation between the ceramic suspensions and the carboxymethyl cellulose (CMC) hydrogels. The deformation of filaments under gravity is simulated by the computational fluid dynamics (CFD) model, further the effects of the shear-thinning behavior close to the filament surface and the evaporation rate for suspensions with different solid content on the final shape of the filaments are investigated. We finally printed a single-wall cone component with a height of 180 mm, a diameter of 90 mm, and a wall thickness of 1.8 mm by the suspension containing a pseudoplastic CMC hydrogel.
研究领域:
材料科学
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先进制造
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Ning Wang,Junjiang Fan,Chi Zhang,Yingna Wu,Rui Yang,Hai Chang,Zirong Zhai
Additive manufacturing of ceramics by vat photopolymerization (VPP) faces persistent challenges during thermal debinding, as air atmospheres often induce severe cracking in green bodies, limiting industrial viability. This study identifies a critical mechanism: low-temperature oxidative decomposition (LTOD) of incompletely cured acrylates below 200 °C in air, which generates trapped gases before escape channels can form, leading to cracking. Through thermogravimetric analysis (TGA) and Fourier-transform infrared spectroscopy (FTIR), we demonstrate that these acrylates undergo premature oxidative cleavage under air, whereas oxygen-free (argon, nitrogen, or vacuum) pretreatment during the initial debinding stage effectively suppresses this phenomenon. Experimental results confirm that applying an oxygen-free environment below 200 °C eliminates low-temperature cracking, allowing subsequent debinding to proceed safely in air. This optimized, staged-atmosphere process produces crack-free silicon nitride green bodies and yields sintered ceramics with exceptional mechanical properties (flexural strength: 1218.4 MPa; fracture toughness: 9.37 MPa·m 1/2 ). The proposed strategy offers a cost-effective and scalable solution for reliable air debinding in ceramic additive manufacturing, providing both theoretical insight and practical guidance for advancing high-performance, low-cost ceramic 3D printing.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Weiwei Men,Na Huang,Sensen Wei,Xiao Wu,Shuwei Zhang,Rongzhen Liu,Yifeng Zhao,Ruijia Ma,Zhichao Cao
The synergistic optimization of broadband electromagnetic wave transmission and high mechanical strength is a key challenge in radome fabrication. This challenge was addressed through a dual-approach: compositional optimization by doping silicon dioxide (SiO 2 ) into a Silicon nitride (Si 3 N 4 ) matrix, and structural design via an innovative skin-core sandwich architecture with a porous core. High-precision fabrication of this structure was realized using Digital Light Processing (DLP) 3D printing technology, and the slurry formulation and modification process were systematically optimized. A composite modification protocol, comprising stearic acid (SA) dry milling (20 h) and subsequent KH560 wet milling (20 h), was demonstrated to yield a slurry with a solid loading of 47 vol%, a viscosity of 8.87 Pa s (at a shear rate of 30 s −1 ), and a maximum curing depth of 89 μm. During printing, a curing depth of 65 μm was utilized. A layer thickness equivalent to one-third of this curing depth was selected, which resulted in green bodies characterized by excellent interlayer bonding and an absence of visible layer lines. After sintering, the obtained Si 3 N 4 ceramic sandwich structure exhibited outstanding comprehensive properties. Flexural strengths of 300.19 MPa and 36.15 MPa were measured for the skin and the porous core, respectively. Over the frequency range of 7-15 GHz, the average values of relative dielectric constants of 4.25 and 2.73 were recorded, with the corresponding average dielectric loss tangents of 0.0186 and 0.0054, thereby confirming that the core was successfully designed for low permittivity and low loss. Consequently, an. effective technical pathway for the design and fabrication of high-performance radome components is provided by this study.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2017
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IF 3.454
Y.L. Zhuang,T.S. Lin,S.J. Wang,P. He,D.P. Sekulic,D.C. Jia
The Co 22.5 Si 77.5 (at.%) braze was used to bond porous Si 3 N 4 ceramics. The effects of brazing temperature on microstructure and the bonding strength of the joint were studied. The results reveal that no visible reaction layer was observed. The corresponding joint strength was low. In order to improve the joint strength a carbon coated modification of the porous Si 3 N 4 substrate was suggested. The impact of this modification on the joint properties was examined. It was established that a SiC reaction layer with a thickness from ∼15 μm to ∼65 μm was formed at the interface and SiC nanowires were observed when the temperature increased from 1280 °C to 1340 °C. The maximum shear strength of the carbon coated and uncoated joints were 115 MPa and 44 MPa, respectively. The significant improvement of the joint strength was attributed to the SiC reaction layer and a strengthening by the presence of SiC nanowires. .
研究领域:
材料科学
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陶瓷与复合材料
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连接与焊接
·
微观结构分析
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DOI
高影响因子
危险品化学品经营许可证（带存储）