CERAMICS INTERNATIONAL
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2024
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IF 5.1
Qingxuan Zhou,Yang Wang,Zhuoqun Han,Jia Liu,Jie Zhao,Wei Chu,Zhicheng Zhao,Jian Li,Zhiqiang Cheng,Ling Li,Futian Liu
Due to the low powder content characteristic of digital light processing in the preparation of ceramic green bodies, significant challenges arise in obtaining high-density, high-performance Si 3 N 4 ceramic. Sintering aids exert a critical influence on the densification and properties of Si 3 N 4 ceramics. To further improve the performance of 3D-printed Si 3 N 4 ceramics, Si 3 N 4 ceramics were fabricated using DLP technology combined with gas pressure sintering employing different ratios of La 2 O 3 -MgO as sintering aids. The ceramic slurries, microstructures, and ceramic performance were studied systematically. The results showed that increasing the proportion of· La 2 O 3 powder enhanced the rheological and curing properties of Si 3 N 4 ceramic slurries. Varying the La 2 O 3 -MgO ratio affected the composition of the liquid phase, leading to differences in the densification and grain growth of Si 3 N 4 ceramics. The average grain size increased with higher ratios of La 2 O 3 -MgO, and reached a maximum value of 0.91 μm with a ratio of 9:1. With the increase of the La 2 O 3 -MgO ratio, the bulk density and shrinkage rate of the ceramics initially increased and then declined. In addition, the flexural strength and fracture toughness of the ceramics peaked at a ratio of 3:7 for La 2 O 3 -MgO, measuring 577 ± 16.28 MPa and 5.84 ± 0.17 MPa m 1/2 , respectively. These results demonstrate that high-performance Si 3 N 4 ceramics can be effectively prepared using DLP technology by adapting the ratio of sintering additives.
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
·
2021
·
IF 4.527
Ting Chen,Dongyu Wang,Xianfu Chen,Minghui Qiu,Yiqun Fan
In this study, a novel method was proposed for preparing high-flux ceramic membranes via digital light processing (DLP) three-dimensional (3D) printing technology. Two different alumina powders were well dispersed in a photosensitive resin to form a UV-curable slurry for DLP 3D printing. The effects of the grading ratio on the viscosity of the slurry and the porosity, pore size distribution , mechanical strength , roughness, and permeability of the ceramic membranes were systematically investigated. The thermal treatment conditions were also studied and optimized. The obtained ceramic membranes exhibited a uniform pore size distribution, a high porosity, a low tortuosity factor, and an asymmetric structure. The combination of these factors led to a high flux for the 3D-printed ceramic membranes. DLP 3D printing exhibited a good potential to be a strong candidate for the next generation of ceramic membrane fabrication technology.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
International Journal of Applied Ceramic Technology
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2024
·Vol. 22
·期 1
·e14888
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IF 1.8
Qi Sha,Jianjun Xie,Yesen Duan,Wenyu Tang,Jingxian Zhang
Digital light processing (DLP) three-dimensional printing has the advantages of both high printing resolution and efficiency and has been used to manufacture high-precision, small, and complex shaped ceramic parts. One of the challenges of DLP is to develop photosensitive ceramic slurries with high solid content and low viscosity, especially for non-oxide ceramics such as silicon nitride due to the dispersion and light absorption problem. This study mainly explores the dispersibility of silicon nitride in ultraviolet (UV)-cured resins and the photocured properties of the slurry. Rheological measurements were utilized to characterize and screen different dispersants in the resin. It was found that DISPERMP is an effective dispersant. In order to improve the curing depth of Si 3 N 4 photosensitive paste, the surface of silicon nitride powder was treated by oxidation, and organic compounds with different refractive indices were also introduced to increase the light penetration depth. It was found that glycerol with a refractive index of 1.474 resulted in the greatest improvement in the curing depth of Si 3 N 4 photosensitive paste. Finally, a proposed slurry composition was developed to successfully print silicon nitride ceramics through UV-curing molding technology.
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
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IF 5.6
Zhongya Zhang,Lijuan Zhang,Guangwu Wen,Yongzhao Hou,Nannan Zhu,Cheng Zhong,Jing Xue,Chuncheng Wei,Shuang Li
In this paper, polysilazane photocurable slurry with low viscosity and excellent rheological properties was prepared with β-Si 3 N 4 filler. Digital light processing (DLP) technique was utilised to form green bodies through optimized printing parameters. It was found that the introduction of β-Si 3 N 4 filler reduced the shrinkage and improved the mechanical properties of the polysilazane derived SiCN ceramics. The flexural strength of the resulted ceramics reached a maximum of 253.0 ± 15.1 MPa while 20 wt% of β-Si 3 N 4 powder was added, and the fracture toughness increased to 3.1 ± 0.3 MPa m 1/2 at 30 wt% of the β-Si 3 N 4 powder addition. The shape of the introduced β-Si 3 N 4 particles were believed to be faveriable for uniform dispersion in the printing slurry without agglomeration. In the following pyrolysis treament the β-Si 3 N 4 powders promoted the release of gaseous products so that maintained the structure integrety of the printed parts and the rod-like β-Si 3 N 4 particles enhanced the energy dissipation during ceramic fracture. In this study, silicon-based composite of β-Si 3 N 4 /SiCN ceramics with excellent mechanical properties were prepared by DLP additive manufacturing technology, which confirmed the feasibility and the great potential of photo-curing additive manufacturing technology in the manufacturing of SiCN ceramic matrix composites with complex structures.
研究领域:
材料科学
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机械工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Youpeng Tu,Chonggao Bao,Rongzhen Liu,Shijia Li,Haiman Xu
As one of the most widely used technologies in ceramic additive manufacturing, digital light processing (DLP) enables the precise formation of ceramic products with complex structures. Current studies on Si 2 N 2 O ceramics are mainly focused on the reactive sintering of Si 2 N 2 O ceramics and the traditional molding and processing processes, and investigations on the DLP of Si 2 N 2 O ceramics are lacking. In this study, Si 2 N 2 O ceramics with complex structures were prepared by DLP. Initially, the effects of the dispersant type and content on the rheology, sedimentation, and curing properties of the Si 2 N 2 O ceramic slurry were investigated. The results revealed that 4 wt% KH570 included as an additive could effectively improve the compatibility between the Si 2 N 2 O powder and resin, imparting good fluidity to the prepared slurry. Furthermore, the UV absorption of the Si 2 N 2 O powder at 450 nm decreased from 0.24 to 0.11, which was conducive for improving the curing properties of the Si 2 N 2 O ceramic slurry. Subsequently, the effects of the sintering additives, holding time, and sintering temperature on the properties of the porous Si 2 N 2 O ceramics were investigated. Finally, a Si 2 N 2 O ceramic slurry with a solid content of 40 vol% was prepared using 5 wt% Al 2 O 3 as a sintering agent. Upon sintering at 1600 °C for 3 h, a Si 2 N 2 O ceramic body with a porosity of 7.26 %, density of 87.54 %, and flexural strength of 207 MPa was obtained.
研究领域:
材料科学
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陶瓷加工技术
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DOI
高影响因子
Crystals
·
2023
·Vol. 13
·期 1
·107
·
IF 2.7
Shaocong He,Yehua Li,Xiao Zong,Shanghua Wu
In this work, Al2O3-AlN composite ceramics with high bending strength and thermal conductivity were fabricated by Digital Light Processing (DLP). The influence of AlN content on the rheological and cure behavior of Al2O3-AlN suspensions, as well as the microstructure, thermal conductivity, and bending strength of Al2O3-AlN ceramics, were systematically investigated. The result shows that the viscosity and cure ability of the suspensions were decreased with the increase of AlN content, which are beneficial to the spreading and printing accuracy of the suspensions. Besides, the bending strength of ceramics can be improved due to the residual stress by the introduction of AlN. Approaches were employed to minimize the formation of AlON in Al2O3-AlN ceramics by optimizing the amount of AlN and the sintering temperature. The thermal conductivity and bending strength of Al2O3-AlN ceramics were 31.72 ± 0.45 W/(m·K) and 572.73 ± 59.40 MPa, respectively, which are much higher than those of Al2O3ceramics fabricated under the same condition. Finally, complex-shaped Al2O3-AlN ceramics components have been successfully fabricated by DLP, which may provide an opportunity to broaden the application of Al2O3-AlN composite ceramics in heat dissipation components.Keywords:Al2O3-AlN composite ceramics;Digital Light Processing;mechanical properties;thermal conductivity
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
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Jiahao He,Wenlu Zhang,Wenbin Li,Chong He
Herein, a pohotosentive polysiloxane (PSO)/talc/Al 2 O 3 slurry was prepared for the digital light processing printing. Liquid photosensitive PSO was exploited as a triple-functioned material, acting both as the resin matrix, a high reactive Si source and a pore generator. Through adjusting the raw material components, polysiloxane can be sintered with talc and Al 2 O 3 fillers after being pyrolyzed to 1200 o C while pores with variable diameters can be generated. Ternary component slurry prepared based on the above strategy possesses the characteristics of low viscosity, high reaction activity and good homogeneity. Sintering schedule of the printed thin-walled precursor was investigated to guarantee the morphology of cordierite product was consistent with the printed model. This work aims to provide a new strategy for DLP printing of MgO-Al 2 O 3 -SiO 2 ternary and other polymer derived ceramics.
研究领域:
材料科学
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陶瓷制造
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产品关联
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-11
·
IF 3.8
Xu Feng,Jin Hang,Wu Huiquan,Jiang Acan,Qiu Bin,Liu Lingling,Gao Qiang,Lin Bin,Kong Weiwei,Chen Songyue,Sun Daoheng
Hydrogels are extensively explored as biomaterials for tissue scaffolds, and their controlled fabrication has been the subject of wide investigation. However, the tedious mechanical property adjusting process through formula control hindered their application for diverse tissue scaffolds. To overcome this limitation, we proposed a two-step process to realize simple adjustment of mechanical modulus over a broad range, by combining digital light processing (DLP) and post-processing steps. UV-curable hydrogels (polyacrylamide-alginate) are 3D printed via DLP, with the ability to create complex 3D patterns. Subsequent post-processing with Fe 3+ ions bath induces secondary crosslinking of hydrogel scaffolds, tuning the modulus as required through soaking in solutions with different Fe 3+ concentrations. This innovative two-step process offers high-precision (10 μm) and broad modulus adjusting capability (15.8–345 kPa), covering a broad range of tissues in the human body. As a practical demonstration, hydrogel scaffolds with tissue-mimicking patterns were printed for cultivating cardiac tissue and vascular scaffolds, which can effectively support tissue growth and induce tissue morphologies.
研究领域:
生物材料学
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组织工程学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Bio Materials
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2025
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IF 4.7
Fangzheng Tong,Xuyang Zhang,Xuanwen Wang,Siying Liu,Xiaoliang Cui,Yajie Zhou,Gang Li,Jun Zhang
Despite the promising potential of digital light processing (DLP)─fabricated silk fibroin (SF) microneedles (MNs) in transdermal applications, their clinical translation faces two major challenges: insufficient manufacturing precision to achieve architectural resolution and inadequate mechanical strength to penetrate the epidermis effectively. To overcome these critical barriers, we developed a methacrylated silk fibroin (Sil-MA) bioink that combines high biocompatibility with enhanced printability. By systematically optimizing material formulation, printing parameters and MN geometry, we successfully fabricated DLP-printed Sil-MA MNs with precise architecture control and superior mechanical performance. These MNs demonstrated no cytotoxicity and enabled efficient transdermal delivery of three distinct dermatological therapeutics. Comprehensive in vitro and in vivo assessments indicated that the DLP-printed Sil-MA MNs also acted as mechanical stimulators, significantly promoting epidermal keratinocyte proliferation. This engineered platform offers a versatile strategy for developing multifunctional MN systems for therapeutic delivery and tissue engineering applications.
研究领域:
生物医学工程
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材料科学
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药剂学
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皮肤科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
·
IF 6.364
Shuo Wang,Lian Peng,Chengnan Song,Chengyu Wang
Digital light processing (DLP) 3D printing technology was applied to manufacture thin dental porcelain veneers. The prepared thin dental porcelain veneers showed excellent translucency and appearance. The median and mean particle sizes of the printed glass powders were 10.11 µm and 12.03 µm, respectively, with a unimodal distribution. The green glass compacts were printed layer by layer, with an individual layer thickness of 50 µm. The results showed that, according to the thermal expansion coefficient (TEC) and the thermogravimetry/differential scanning calorimetry (TG/DSC), the debinding procedure of the green glass compacts was annealed at 320 °C for 120 min and 570 °C for 120 min, respectively. The results of the classical sintering kinetics models and SEM examination demonstrated that the glass compacts were sintered at 790 °C for 5 min. The flexural strength and the chemical solubility of the sintered glasses were 132.58 ± 25.83 MPa and 18 μg·cm −2 , respectively. Both flexural strength and chemical solubility met ISO 6872 criteria.
研究领域:
材料科学
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牙科学
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生物医学工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Jie Zhang,Kang-Bo Yu,Jia-Min Wu,Chun-Sheng Ye,Wen Zheng,Heng Liu,Shi-Feng Wen,Chun-Ze Yan,Yu-Sheng Shi
SiO 2 -based ceramic cores are widely used in the preparation of gas turbine engine hollow blades due to their excellent chemical stability and easy removal after casting. In this paper, ZrSiO 4 reinforced SiO 2 -based ceramics were fabricated using digital light processing (DLP) technology. The results showed that the addition of ZrSiO 4 reduced the cure depth due to its high UV light absorptivity and refractive index . When the content of ZrSiO 4 increased to 15 wt%, the cristobalite content reached the maximum, and radial shrinkage reached the minimum of 1.4%. ZrSiO 4 grains could hinder the propagation of cracks, enhancing the room-temperature flexural strength . At 1550 °C, fracturing across SiO 2 grains in SiO 2 -based ceramics led to the great improvement of high-temperature flexural strength. When the content of ZrSiO 4 reached 15 wt%, the flexural strength at room temperature and high temperature was 11.5 MPa and 36.7 MPa, respectively. Therefore, the SiO 2 -based ceramics prepared using DLP technology have good room temperature and high temperature properties, and are expected to be used for hollow blade casting.
研究领域:
材料科学
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工程学
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产品关联
DOI
高影响因子
Journal of Manufacturing Processes
·
2025
·
IF 6.8
Feng Xu,Hang Jin,Zhuomin Zhou,Acan Jiang,Lingling Liu,Haohang Fang,Qiang Gao,Yu-Chuan Su,Zhengmao Ding,Qinnan Chen,Songyue Chen,Daoheng Sun
Digital light processing (DLP) has emerged as one of the most promising methods for constructing intricate 3D hydrogel structures. However, the material availability of hydrogels is quite limited for resin vat-based printing. To overcome this issue, we propose a surface tension confined digital light processing (STC-DLP) technique that utilizes liquid surface tension and surface-treated substrates to confine the hydrogel solution during printing, to minimize the solution consumption. The “top-down” DLP printing enables layer-by-layer curing of hydrogel solutions into controlled 3D structures. A soft and a rigid hydrogel solution was selected as demonstration. By adding hydrogel solution with desired volume, highly accurate microtissue models, flexible sensors, and microfluidic chips with complex 3D structures were fabricated with high solution availability. This approach achieves efficient utilization of hydrogel solutions, and is expected to be especially applicable for printing of scarce or expensive materials.
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）