CERAMICS INTERNATIONAL
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2024
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IF 5.1
Yongkang Yang,Boran Wang,Jie Li,Jianglin Wang,Ke Wang,Yue Wang,Shuxin Niu,Xin Li,Xiqing Xu
In the vat photopolymerization (VPP) 3D printing of ceramic cores, the solid loading is generally conducive to the microstructure and performance of products, owing to the improved bonding between adjacent layers and enhanced dimensional accuracy with increasing solid loading. In this work, the content of ceramic powder in photosensitive resin was optimized, the solid loading increased from 56 vol% to 68 vol%, and a novel curing model was established to explain the impact of solid loading on the printing precision. During sintering, the shrinkage is regulated to approximately 3 %, demonstrating a more homogeneous structure. The interlayer strength increased to 11.43 MPa while maintaining an apparent porosity of 23.47 %. Furthermore, the anisotropy of VPP-3D printed ceramic cores dependent on the solid loading was investigated. The ratio of vertical strength to horizontal strength (σ V /σ H ) increased from 0.57 to 0.68 when the solid loading grew from 56 vol% to 68 vol%. At 1540 °C, the value of σ V /σ H was further enhanced to 0.81. This value met the precision casting criteria for ceramic cores effectively. This work can provide a reference for the investigation of high-solid-loading ceramic cores.
研究领域:
材料科学
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制造工程
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DOI
高影响因子
Journal of the Korean Ceramic Society
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2023
·Vol. 60
·期 3
·581-590
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IF 2.5
Zhang Xu,Zhang Jingde,Tian Yuhang,Xiao Shikang,Li Jianzhang,Han Guifang
Slurries with high solid content and low viscosity are highly necessary to lower the sintering shrinkage and avoid possible defects for ceramic components fabricated by vat photopolymerization technique. However, the viscosity of slurry dramatically arises with the increase of solid content, which severely affects the printing process and the quality of preformance. To solve this issue, a novel combined strategy of powder surface modification and selection of dispersant was proposed to significantly increase the solid load without too much increase in viscosity. The surface of Al 2 O 3 particles was modified by Silane A174 to improve its wettability with resins, and then the use of KOS 110 formed steric hindrance between particles achieving good dispersion. The synergistic effect of the modifier and dispersant was realized. Al 2 O 3 slurry with a high solid loading up to 65 vol% and low viscosity of 20.0 Pa·s at 30 s −1 was prepared for stereolithography-based DLP 3D printing, which had among the highest performance in photosensitive Al 2 O 3 slurries.
研究领域:
材料科学
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3D打印技术
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DOI
高影响因子
Materials Research Express
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2021
·Vol. 8
·期 1
·015403
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IF 1.62
Xiaoguang Xia,Guolin Duan
High solid loading water-based zirconia slurries for direct ink writing had been successfully prepared in this paper. The water-soluble epoxy resin and sodium polyacrylate were used as the binder and dispersant, respectively. The effect of solid loading on the rheological properties of zirconia slurries was systematically investigated. The 54–58 vol.% zirconia slurries exhibited suitable printability for direct ink writing. After sintering at 1550 °C for 2 h, the properties of sintered zirconia ceramic specimens including linear shrinkage, relative density, flexural strength, tensile strength and microstructure were examined by a series of test methods. Further, the intrinsic relationships between the solid loading and physical and mechanical properties of zirconia ceramic specimens were explored. The experimental results showed that the densification and strength of sintered zirconia ceramic could be significantly improved by increasing the solid loading of zirconia due to the less content of organic matter and water. The maximum relative density, flexural strength and tensile strength of the sintered specimens were 98.8% ,676 ± 10 MPa and 92 ± 5 MPa, respectively, when the zirconia solid loading was 58 vol.%.
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
Journal of Materials Research and Technology-JMR&T
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2024
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IF 6.2
M. Irfan Hussain,Min Xia,Xiao-Na Ren,Changchun Ge,Yunsong Zhao,Zhen Shen
High-precision microfabrication of functional ceramics with complex shapes and tailored properties currently arouse significant attention, but maintaining dimensional accuracy is still a research challenge. Herein, an innovative digital light processing (DLP) 3D technology is employed to fabricate calcined kaolin (Al 2 O 3 ·2SiO 2 ) ceramic with intricate structures, achieving high precision and densification. To illustrate the potential of different solid content slurries (43, 45, 46.2, and 47.5 vol%), and the curing thickness with tuned exposure time (8s, 10s, and 12s), we investigated their impact on physical properties and microstructures. The results show that the optimal sintering at 1200 °C achieved an exceptionally high density 2.38 g/cm 3 , with low shrinkage (17.35 %) along XY-direction and porosity reaching up to 15.53%. The highest level of solids slurry at 47.5 vol% increased the densification and open porosity. For all solid contents, the shrinkage along the Z-direction was exceeded compared to the XY-direction. A comprehensive evaluation of sintered morphologies, including their topography and chemical composition. The EDX mapping showed that kaolin ceramics have excellent stability at high temperatures. The highest flexural strength of DLP printed specimen at temperature (1200 °C) is 71.60 MPa, whereas that of the diamond porous structure is 6.66 MPa. Our work sheds light on high-precision microfabrication of complex shapes with unparalleled accuracy and efficiency, paving the way for high-performance functional ceramic materials.
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
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2025
·
IF 5.6
Jiewen Mo,Xiaoteng Chen,Jinxing Sun,Haowen Liang,Peng Zhou,Pavel Grinchuk,Jiaming Bai
Silicon carbide ceramics, featuring high-temperature resistance, are important in aerospace and renewable energy fields. With the increasing demand for complex ceramic structures, traditional manufacturing methods are becoming inadequate. Additive manufacturing technology based on vat photopolymerization holds great promise. However, during the additive manufacturing process of silicon carbide ceramics, issues such as light absorption and limited curing depth are faced. These problems impede the effective development of high-solid-loading silicon carbide ceramic slurries. This study systematically probes into the impacts of powder modification, dispersant concentration, and solid loading on the properties of silicon carbide ceramic slurries. Additionally, the oxidation degree of the powder was regulated. A slurry with a 50 vol.% solid loading suitable for vat photopolymerization has been developed, and complex silicon carbide structures have been fabricated. After sintering, the samples exhibit a flexural strength of 235.62 MPa and a density of 2.79 g/cm 3 , thus enhancing the potential for manufacturing complex ceramic components.
研究领域:
材料科学
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增材制造
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陶瓷工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shuang Yin,Jiajun Liu,Chengyun Sun,Yao Zhang,Liqiang Liu,Ruzhong Zuo
In this study, high-performance fused silica ceramics were fabricated from bimodal distribution powders via gelcasting and pressureless sintering. The solid loading of slurries (60–85 vol%) and sintering conditions (1280 °C for 1–6 h) significantly influenced the composition, microstructure, sintering, and mechanical behavior of fused ceramics. Increasing solid loading promoted densification, enhanced bulk density, and inhibited cristobalite precipitation. In contrast, extending holding time enhanced viscous flow and densification, but increased cristobalite precipitation. Therefore, both solid loading and holding time must be optimized to enhance material densification and suppress cristobalite precipitation. Fused silica ceramics prepared under 80 vol% solid loading and 3 h holding time showed optimal overall performance. They achieved a bulk density of 2.00 g/cm 3 , a flexural strength of 71.21 MPa, and a linear thermal expansion coefficient (approximately 10 −6 /°C) within the range from room temperature to 1000 °C. Following 20 thermal shock cycles between room temperature and 1000 °C, the material retained a residual flexural strength of 23.64 MPa, with a corresponding strength retention rate of 33.20 %. This study provides valuable guidance for fabricating high-strength fused silica ceramics via gelcasting and pressureless sintering.
研究领域:
陶瓷工程
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材料科学
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微观结构调控
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力学性能
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热震性能
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
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IF 2.605
Mingxian Yu,Jingxian Zhang,Xiaoguang Li,Hanqin Liang,He Zhong,Yinsheng Li,Yusen Duan,Dong Liang Jiang,Xuejian Liu,Zhengren Huang
The preparation of concentrated suspensions with high stability is crucial for tape casting . Dispersant plays an important role in the developing of high solid loading slurries with low viscosity. In this study, castor oil, phosphate ester and castor oil phosphate were selected as dispersants for alumina suspensions. The interaction between dispersant and alumina powders was characterized in terms of adsorption and viscosity measurements. Results showed that castor oil phosphate is more effective dispersant for alumina slurries. The influence of dispersant content, binder content, plasticizer/binder ratio and solid loading on the green sheet and mechanical properties of as-sintered alumina samples were also investigated. It was shown that the optimized formulation for dispersant, binder, plasticizer/binder ratio and solid loading was 2.22 wt%, 5.90 wt%, 1.0 and 31 vol%, respectively. Alumina ceramics showed improved mechanical properties, with the indentation hardness and fracture toughness as 15.91±0.15 GPa and 4.29±0.06 MPa m 1/2 , respectively.
研究领域:
材料科学
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陶瓷工程
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化学工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Shijia Li,Chonggao Bao,Rongzhen Liu,Wencai Dong,Haiqiang Ma,Yunqing Jia
Cordierite precursor pastes including talc, alumina and silica particles were successfully prepared to fabricate porous cordierite ceramics by supportless stereolithography (SLA). To combining the printability and self-supportability properties of the pastes, the effects of the type and content of the dispersant on the rheological behavior were systematically investigated. Additionally, the effects of solid loading and plasticizer type on the rheological behavior of the cordierite precursor pastes were studied. It was found that 1 wt% Span80 was optimal for modifying the rheological behavior of the cordierite precursor pastes. Furthermore, the results indicated that the printability deteriorated, and the hysteresis area and yield stress of the cordierite precursor pastes increased rapidly when the solid loading exceeded 33 vol%. With the addition of 18 vol% plasticizers to replace UV-curing resins, dibutyl phthalate (DBP) was more effective in improving the printability of cordierite precursor pastes and ensuring self-supportability, compared with the polyethylene glycol 400 (PEG400). Finally, using the optimized cordierite precursor pastes, the porous cordierite ceramics with custom structures were successfully prepared.
研究领域:
材料科学
·
增材制造
·
陶瓷
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）