Open Ceramics
·
2024
·
IF 2.9
Shuhao Qi,Tengkuo Sun,Mi Cui,Hongyan Li,Yanlong Chen,Tao Zhou,Qin Lian,Changquan Shi,Dichen Li
Zirconia is a ceramic material with fine properties for dental restorations, but the color of zirconia does not match natural teeth color. In this study, the effect of zirconia doped with different rare earth oxides on the color of denture manufactured by Digital Light Processing (DLP) method was investigated. Experimental results showed that the color of the ceramic parts after sintering could cover Vita 3D colorimetric plate for natural teeth, and the color accuracy was within 1.5 NBS. Meanwhile, the forming accuracy of the denture reached 67.7 μm, and the three-point bending strength was 520.32 ± 35.44–649.10 ± 42.31 MPa, which met the requirements of triple crown in dentistry. This study establishes a method to achieve colors of natural teeth using DLP technology, and the results of this study have important leading implications for the use of additive manufacturing technology to fabricate natural-color ceramic dentures for dental applications.
研究领域:
牙科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yilin Liu,Wenzhao Geng,Linan Wang,Hailong Wang,Rui Zhang,Di Lan,Bingbing Fan
With the rapid advancement of wearable electronic devices in both civilian and military applications, electromagnetic (EM) pollution has become a growing concern, leading to an increased demand for efficient electromagnetic wave (EMW) absorbing materials. Conventional absorbing materials often suffer from limited design flexibility and challenging processing requirements. To address these issues, this study introduces a series of MXene/Polyacrylamide hydrogels (MPH) with excellent EMW absorption properties, fabricated into complex geometric structures using digital light processing (DLP) printing technology. These functional hydrogels feature a three-dimensional (3D) porous architecture, providing robust mechanical properties and exceptional EMW absorption performance. The MXene component, enriched with surface functional groups, not only improves impedance matching but also synergistically interacts with other dissipation mechanisms to enhance overall EMW absorption. Notably, the MPH-1 specimen demonstrates an outstanding effective absorption bandwidth (EAB) of 7.36 GHz at a thickness of 1.95 mm (10.64–18 GHz), and a minimum reflection loss (RL min ) of −38.20 dB at 10.88 GHz at a thickness of 2.40 mm. This work presents a novel and efficient strategy for the rapid and precise fabrication of gel-based functional materials, offering a straightforward method for developing wearable, flexible EMW-absorbing devices with superior properties.
研究领域:
材料科学
·
电磁学
·
3D打印技术
✓ 已验证
产品关联
DOI
高影响因子
WEAR
·
2023
·
IF 5
Pan Wu,Tianyu Yu,Guotai Li,Mingjun Chen
Fabrication of composites with anisotropic properties by additive manufacturing has drawn great attention in recent years. Magnetic-assisted digital light processing (DLP) of micron-scale carbonyl iron powders (CIPs)/resin composites (MACRCs) with tunable microstructure and magnetic properties can be used as smart sensors/actuators in soft robots , aerospace/automobile applications and drug delivery devices due to their complex geometries and fast activation response. However, anisotropic, wear and mechanical properties remain unclear for MACRCs. This work aims to investigate their microstructure-function-wear resistance relationship. Photosensitive resin and CIPs with a concentration up to 5 wt% were prepared to print samples with different anisotropic magnetic properties, using magnetic field-assisted techniques. The results show that addition of CIPs in resin can still maintain good printability, while the mechanical properties deteriorate slightly as the micro-size CIPs reduced the interface bonding strength . Anisotropic magnetic properties were studied using the magnetization tests. In addition, wear tests showed that the coefficient of friction of samples decreases from 0.4938 (pure resin) to 0.4066 (MACRCs with 5 wt% CIPs), indicating improved wear resistance by the addition of CIPs. This work demonstrated that tunable magnetic and mechanical properties can be achieved by manipulation anisotropy of the magnetic nanoparticles using external magnetic field .
研究领域:
材料科学
·
制造工程
·
力学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Jian Gong,Yuanjie Wang,Jing Huang,Xueliang Pei,Liu He,Zhengren Huang,Yujie Song,Qing Huang
Digital light processing of ceramic precursor was used to prepare SiC rich ceramic parts in this study. In order to achieve appropriate light curing rate, the ceramic precursor allylhydropolycarbosilane (LHBPCS) was mixed with acrylate monomers tripropylene glycol diacrylate and trimethylolpropane triacrylate. The content of acrylate monomers was optimized to increase the ceramic yield and reduce the shrinkage during pyrolysis. According to the results of thermogravimetric analysis and photolithography experiment, 15 wt% acrylate monomers was appropriate. 330 mJ/cm 2 UV irradiation dose was selected for every layer with a thickness of 25 μm, and green bodies with different shapes were successfully printed. During pyrolysis, these printed parts changed from transparent yellow to black accompanying uniform shrinkage. At 1000 °C, the shrinkage was 24.0–26.0%, and crack-free SiC rich ceramic parts with density of 2.11 g/cm 3 and chemical formula of SiC 1.31 O 0.26 were obtained.
研究领域:
材料科学
·
陶瓷加工
✓ 已验证
产品关联
DOI
高影响因子
Additive Manufacturing
·
2022
·
IF 11.632
Meng Li,Hai-Lu Huang,Jia-Min Wu,Ya-Ru Wu,Zhang-Ao Shi,Jing-Xian Zhang,Yu-Sheng Shi
It is difficult to form Si 3 N 4 ceramics by DLP technology owing to the high refractive index and high ultraviolet (UV) absorption of Si 3 N 4 powder. In this paper, the Si 3 N 4 ceramics were successfully fabricated by DLP technology using Si 3 N 4 powder coated with Al 2 O 3 -Y 2 O 3 sintering additives. The effects of the coating amount of sintering additives on the properties of Si 3 N 4 ceramic slurry , green bodies and parts after sintering were systematically studied. When Al(NO 3 ) 3 and Y(NO 3 ) 3 solutions were added at a content of 20 mL/100 g Si 3 N 4 , the slurry with lowest viscosity (0.042 Pa·s at a shear rate of 30 s −1 ) and a higher monolayer curing depth (47.9 ± 1.2 µm) was obtained, the relative density and flexural strength of the Si 3 N 4 ceramics reached maximum values at 85.4% ± 0.3% and 149.2 ± 1.9 MPa. The shrinkage of the Si 3 N 4 ceramics remained almost unchanged after coating Al 2 O 3 -Y 2 O 3 sintering additives. Finally, the Si 3 N 4 ceramics with excellent quality and clear outline were well prepared. This research has laid a certain experimental basis for DLP forming Si 3 N 4 and other non-oxide ceramics, which is of great researching significance.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 3
·947
·
IF 3.4
Yanlong Wu,Ruomeng Chen,Xu Chen,Yongqiang Yang,Jian Qiao,Yaxiong Liu
Strong and tough β-TCP/PCL composite scaffolds with interconnected porosity were developed by combining digital light processing and vacuum infiltration. The composite scaffolds were comprised of pure β-TCP, β-TCP matrix composite and PCL matrix composite. The porous β-TCP/PCL composite scaffolds showed remarkable mechanical advantages compared with ceramic scaffolds with the same macroscopic pore structure (dense scaffolds). The composite scaffolds exhibited a significant increase in strain energy density and fracture energy density, though with similar compressive and flexural strengths. Moreover, the composite scaffolds had a much higher Weibull modulus and longer fatigue life than the dense scaffolds. It was revealed that the composite scaffolds with interconnected porosity possess comprehensive mechanical properties (high strength, excellent toughness, significant reliability and fatigue resistance), which suggests that they could replace the pure ceramic scaffolds for degradable bone substitutes, especially in complex stress environments.Keywords:porous composite scaffolds;mechanical properties;digital light processing;infiltration;gradient structure
研究领域:
生物材料学
·
骨科工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Jove-Journal of Visualized Experiments
·
2023
·
IF 1.2
Yang Li,Yue Wang,Jun Yin,Jin Qian
Precise printing fabrication of bioinks is a prerequisite for tissue engineering; the Jacobs working curve is the tool to determine the precise printing parameters of digital light processing (DLP). However, the acquisition of working curves wastes materials and requires high formability of materials, which are not suitable for biomaterials. In addition, the reduction of cell activity due to multiple exposures and the failure of structural formation due to repeated positioning are both unavoidable problems in conventional DLP bioprinting. This work introduces a new method of obtaining the working curve and the improvement process of continuous DLP printing technology based on such a working curve. This method of obtaining the working curve is based on the absorbance and photorheological properties of the biomaterials, which do not depend on the formability of the biomaterials. The continuous DLP printing process, obtained from improving the printing process by analyzing the working curve, increases the printing efficiency more than tenfold and greatly improves the activity and functionality of cells, which is beneficial to the development of tissue engineering.
研究领域:
生物材料学
·
组织工程学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qianlong Fu,Yuting Ma,Juan Wang,Yongzhao Yang,Peng Wang,Shuang Li,Yang Zhao
High-purity SiC ceramic membrane has gained tremendous attention in the treatment of various corrosive wastewaters. Additive manufacturing technique makes it possible to fabricate high-purity SiC ceramic membrane with complex configurations. Here, we proposed a route for the preparation of high-purity SiC ceramic membrane support using digital light processing and SiC whisker reinforcement. With the increase of whisker content, the viscosity of SiC w /SiC photosensitive slurry increased due to the formation of whiskers agglomerations; the average pore size shifted from 3.15 μm to 1.35 μm with the occupation of large pores by SiC whiskers. In addition, the compressive strength of the ceramic support increased from 10.7 MPa to 16.7 MPa because of the decline in pore size and the toughening effects by SiC whiskers. So, the introduced SiC whiskers enhanced the pore connectivity and mechanical strength of the porous ceramics. This work provides a feasible path to manufacture high-purity SiC ceramic membrane support with complex configuration, high pore-connectivity and excellent mechanical properties.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yangli Xu,Zeling Yang,Guoqin Huang,Chenxu Ren,Guangyao Han,Xiaopeng Jiang,Tingting Li,Congming Ke,Yong Zeng,Xipeng Xu
Al 2 O 3 ceramic have excellent chemical inertness, superior heat resistance, and excellent corrosion resistance, so they are considered ideal materials for manufacturing high-performance components such as thermal end devices in aerospace, heat dissipation panels in electronic communication, and exhaust filters in the automotive industry. Digital Light Processing (DLP) is a useful technology to fabricate complex Al 2 O 3 ceramic components. However, the size shrinkage effect of DLP-fabricated components need to be investigated deeply before its further application. In this work, we utilized DLP technology to fabricate Al 2 O 3 ceramic honeycomb structures and systematically investigated their microstructure, size shrinkage, and mechanical properties. Our findings revealed that the Al 2 O 3 ceramic grains exhibit flake-like structures with an average diameter of 1–2 μm, and the ceramic particles are tightly bonded. The shrinkage rates in the X and Y axes were 7.54 % and 7.42 %, respectively, while the Z-axis exhibited a more significant shrinkage of 13.04 %. This anisotropic shrinkage in different direction was attributed to accumulation of the interlayer bonding under gravity action during debinding and sintering process. The compressive stress-strain curve of the honeycomb structures demonstrated a typical brittle compressive behavior, including elastic, stress plateau, and brittle fracture stages. The honeycomb structures exhibited an elastic modulus of 54.49 ± 1.22 MPa and a compressive strength of 10.22 ± 0.42 MPa. The fracture analysis indicated that the fractures region of honeycomb structures initiated at the corners of the honeycomb structures, indicating their easy-broken compared to the walls. These findings provide valuable guidance for the high-precision and high-performance manufacturing of complex Al 2 O 3 ceramic components.
研究领域:
材料科学
·
制造工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qianlong Fu,Yongzhao Yang,Juan Wang,Feng Hu,Shuang Li,Yang Zhao
The rapid development of additive manufacturing techniques enables the preparation of SiC ceramics with complex configurations; however, the high sintering temperature and defects-control are still great challenges during processing. Thus, SiC ceramics were prepared by digital light processing followed by liquid phase sintering using Al 2 O 3 –Y 2 O 3 additives in this study. The photopolymerization of the SiC slurry, microstructures and mechanical properties of the sintered ceramics were investigated. The Al 2 O 3 –Y 2 O 3 additives enhanced the curing ability of the photosensitive SiC slurries by reducing the absorbance and scattering of UV light. The liquid phase accelerated the densification of the ceramics by particles rearrangement and interfacial bonding. Thus, the flexural strength of the ceramics increased from 41.0 MPa to 62.8 MPa with sintering temperature increasing.
研究领域:
材料科学
·
制造工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2024
·
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
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
·
2025
·
IF 7.5
Yuhao Guo,Xiangjun Zha,Xinyu Huang,Zhicheng Cheng,Tingxian Ling,Jigang Huang
Top-down digital light processing (DLP) 3D printing is a promising approach for high-resolution and multi-material fabrication. However, the unconstrained resin surface often leads to curing outside the focal plane during the printing process, resulting in significant losses in manufacturing accuracy. To address this defocusing issue, we propose an improved top-down DLP 3D printing method that enables real-time calibration of the resin level, ensuring each layer is printed precisely on the focal plane. This approach reduces the deviation between the curing plane and the focal plane from hundreds of microns to just a few microns, significantly enhancing printing resolution and surface finish. Additionally, the method allows for the fabrication of multi-material objects with gradual interfaces in a single vat, improving bonding strength between different materials. Moreover, by controlling the resin level, the proposed technique facilitates material switching between multiple vats while maintaining a constant curing plane, enabling the creation of high-fidelity multi-material structures. This innovative strategy advances the field of DLP 3D printing by offering a rapid, precise, and versatile solution for high-resolution and multi-material fabrication.
研究领域:
制造工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）