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Articles de revues sur le sujet « Stereolithographu »

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Auteur : Grafiati

Publié le 20 avril 2024

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1

Konasch, Jan, Alexander Riess, Michael Teske, Natalia Rekowska, Natalia Rekowska, Robert Mau, Thomas Eickner, Niels Grabow et Hermann Seitz. « Novel 3D printing concept for the fabrication of time-controlled drug delivery systems ». Current Directions in Biomedical Engineering 4, n^o 1 (1 septembre 2018) : 141–44. http://dx.doi.org/10.1515/cdbme-2018-0035.

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AbstractThree-dimensional (3D) printing has become a popular technique in many areas. One emerging field is the use of 3D printing for the development of 3D drug delivery systems (DDS) and drug-loaded medical devices. This article describes a novel concept for the fabrication of timecontrolled drug delivery systems based on stereolithography combined with inkjet printing. An inkjet printhead and an UV-LED light source have been integrated into an existing stereolithography system. Inkjet printing is used to selectively incorporate active pharmaceutical ingredients (API) during a stereolithographic 3D printing process. In an initial experimental study, poly (ethylene glycol) diacrylate (PEGDA) was used as polymer whereas 2-Hydroxy-4´-(2- hydroxyethoxy)-2-methylpropiophenone (Irgacure 2959) and Lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) were used as photoinitiators. Basic structures could be manufactured successfully by the new hybrid 3D printing system.

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Corcione, Carola Esposito. « Development and characterization of novel photopolymerizable formulations for stereolithography ». Journal of Polymer Engineering 34, n^o 1 (1 février 2014) : 85–93. http://dx.doi.org/10.1515/polyeng-2013-0224.

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Abstract Novel photopolymerizable formulations, able to photopolymerize with a dual mechanism (cationic and radical), were developed and characterized as potential resins for stereolithography (SL) process. The influence of the presence of organically modified boehmite nanoparticles on the properties of the photopolymerizable mixtures was also analyzed. The main properties required for a liquid SL resin are a high reactivity and a low viscosity. All of the experimental formulations produced, even in the presence of boehmite nanoparticles, are able to satisfy these significant requirements. Physical-mechanical and thermal properties of the photocured samples, obtained starting from the experimental formulations, were finally measured. The cured nanocomposite bars show a high transparency, confirming the good dispersion of the nanofiller in the polymeric matrix and possess improved glass transition temperature (Tg) and mechanical performances, compared to the unfilled system and to a commercial stereolithographic resin. These results suggest the possibility of using the novel nanofilled photopolymerizable suspensions in the stereolithographic apparatus to build, not only esthetical, but also functional prototypes.

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Islas Ruiz DDS, Ma del Socorro, Miguel Ángel Loyola Frías DDS, Ricardo Martínez Rider DDS, Amaury Pozos Guillén DDS, PhD et Arturo Garrocho Rangel DDS, PhD. « Fundamentals of Stereolithography, an Useful Tool for Diagnosis in Dentistry ». Odovtos - International Journal of Dental Sciences 17, n^o 2 (1 décembre 2015) : 15. http://dx.doi.org/10.15517/ijds.v17i2.20730.

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Advancements in digital technology and imaging over the last 25 years have permitted the implementation of three-dimensional (3D) modeling protocols in Dentistry. The use of stereolithographic models has progressively replaced traditional milled models and x-rays in the management of craniofacial anomalies and in implant rehabilitation. Diverse advantages can be mentioned, including better visualization of complex anatomical structures and more precise and sophisticated pre-surgical planning, through a simulated insight of the procedures of interest. The aim of this review is to provide essential information about the different applications and limitations of stereolithography, addressed to those general dentists and dental students interested in gaining experience in the reconstructive surgery and implant placement fields.

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Paiva, Wellingson Silva, Robson Amorim, Douglas Alexandre França Bezerra et Marcos Masini. « Aplication of the stereolithography technique in complex spine surgery ». Arquivos de Neuro-Psiquiatria 65, n^o 2b (juin 2007) : 443–45. http://dx.doi.org/10.1590/s0004-282x2007000300015.

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Many techniques have been proposed for surgical training as a learning process for young surgeons or for the simulation of complex procedures. Stereolithograpfy, a rapid prototyping technique, has been presented recently as an option for these purposes. We describe the case of a 12 years old boy, diagnosed with Ewing´s sarcoma in the cervical spine. After a surgical simulation accomplished in the prototype, built by stereolithography, the patient was submitted to a C4 corpectomy and to a C4 and C3 laminectomy with anterior and posterior fixation, a non intercurrence procedure. This technique is an innovative and complementary tool in diagnosis and therapy. As a result, it is easier for the surgeon to understand the complexity of the case and plan the approach before any surgical procedure.

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Kreuels, Klaus, David Bosma, Nadine Nottrodt et Arnold Gillner. « Utilizing direct-initiation of thiols for photoinitiator-free stereolithographic 3D printing of mechanically stable scaffolds ». Current Directions in Biomedical Engineering 7, n^o 2 (1 octobre 2021) : 847–50. http://dx.doi.org/10.1515/cdbme-2021-2216.

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Abstract The automated production of artificial biological structures for biomedical applications continues to gather interest. Different fields of science are combined to find solutions for the arising multidimensional problems. Additive manufacturing in combination with material science provides one solution for the biological issues around 3D cell culture and construction of living tissues. Here, we present the photoinitiator-free stereolithographic fabrication of thiol-ene polymers with microarchitectures in the range of tens of microns for scaffolds up to the millimeter scale. Scaffolds composed of cubic unit cells were designed using computer-aided design (CAD) and subsequently 3D printed with a custom-made laser stereolithography setup. The process parameters were determined step by step with increasing complexity and number of parameters. Gained insights were applied to the fabrication of 3D printed test specimens. The quality of the 3D printed parts was evaluated by measuring the porosity and optical microscopy images. Furthermore, the mechanical properties of the scaffold structures were characterized using compression testing and compared with the bulk material revealing a lower capacity to bear load but higher flexibility. In this study, we demonstrate the advantages of combining the high-precision, freeform fabrication of stereolithography with a biocompatible material for the fabrication of complex microarchitectures for biomedical applications

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Dizon, John Ryan C., Ray Noel M. Delda, Madelene V. Villablanca, Juvy Monserate, Lina T. Cancino et Honelly Mae S. Cascolan. « Material Development for Additive Manufacturing : Compressive Loading Behavior of SLA 3D-Printed Thermosets with Nanosilica Powders ». Materials Science Forum 1087 (12 mai 2023) : 137–42. http://dx.doi.org/10.4028/p-1n1o01.

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3D printing is now being used in many different applications. This adoption of 3D printing in these applications is accelerated by the development of new materials such as high performance polymers and nanocomposites. In this study, a commercially-available stereolithographic (SLA) resin has been reinforced with 0%, 0.1%, 0.3% and 0.5% nanosilica powder. The resulting mixture has been 3D-printed using a stereolithography 3d printer. The 3D-printed composites have been post-cured in a UV chamber and the mechanical properties have been assessed under compressive loading using a universal testing machine (ASTM-D695). The results show that adding nanosilica powder to the resin would increase the compressive strength of the resin, and that the highest compressive strength could be observed when 0.1% nanosilica poweder was added to the resin.

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Dietrich, Christian Andreas, Andreas Ender, Stefan Baumgartner et Albert Mehl. « A validation study of reconstructed rapid prototyping models produced by two technologies ». Angle Orthodontist 87, n^o 5 (1 mai 2017) : 782–87. http://dx.doi.org/10.2319/01091-727.1.

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ABSTRACT Objective: To determine the accuracy (trueness and precision) of two different rapid prototyping (RP) techniques for the physical reproduction of three-dimensional (3D) digital orthodontic study casts, a comparative assessment using two 3D STL files of two different maxillary dentitions (two cases) as a reference was accomplished. Materials and Methods: Five RP replicas per case were fabricated using both stereolithography (SLA) and the PolyJet system. The 20 reproduced casts were digitized with a highly accurate reference scanner, and surface superimpositions were performed. Precision was measured by superimposing the digitized replicas within each case with themselves. Superimposing the digitized replicas with the corresponding STL reference files assessed trueness. Statistical significance between the two tested RP procedures was evaluated with independent-sample t-tests (P < .05). Results: The SLA and PolyJet replicas showed statistically significant differences for trueness and precision. The precision of both tested RP systems was high, with mean deviations in stereolithographic models of 23 (±6) μm and in PolyJet replicas of 46 (±13) μm. The mean deviation for trueness in stereolithographic replicas was 109 (±4) μm, while in PolyJet replicas, it was 66 (±14) μm. Conclusions: Comparing the STL reference files, the PolyJet replicas showed higher trueness than the SLA models. But the precision measurements favored the SLA technique. The dimensional errors observed in this study were a maximum of 127 μm. In the present study, both types of reproduced digital orthodontic models are suitable for diagnostics and treatment planning.

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Hoffmann, Andreas, Holger Leonards, Nora Tobies, Ludwig Pongratz, Klaus Kreuels, Franziska Kreimendahl, Christian Apel, Martin Wehner et Nadine Nottrodt. « New stereolithographic resin providing functional surfaces for biocompatible three-dimensional printing ». Journal of Tissue Engineering 8 (1 janvier 2017) : 204173141774448. http://dx.doi.org/10.1177/2041731417744485.

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Stereolithography is one of the most promising technologies for the production of tailored implants. Within this study, we show the results of a new resin formulation for three-dimensional printing which is also useful for subsequent surface functionalization. The class of materials is based on monomers containing either thiol or alkene groups. By irradiation of the monomers at a wavelength of 266 nm, we demonstrated an initiator-free stereolithographic process based on thiol-ene click chemistry. Specimens made from this material have successfully been tested for biocompatibility. Using Fourier-transform infrared spectrometry and fluorescent staining, we are able to show that off-stoichiometric amounts of functional groups in the monomers allow us to produce scaffolds with functional surfaces. We established a new protocol to demonstrate the opportunity to functionalize the surface by copper-catalyzed azide-alkyne cycloaddition chemistry. Finally, we demonstrate a three-dimensional bioprinting concept for the production of potentially biocompatible polymers with thiol-functionalized surfaces usable for subsequent functionalization.

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Mele, Mattia, et Giampaolo Campana. « An experimental approach to manufacturability assessment of microfluidic devices produced by stereolithography ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 234, n^o 24 (9 juin 2020) : 4905–16. http://dx.doi.org/10.1177/0954406220932203.

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Lab-on-a-Chips integrate a variety of laboratory functions and embed microchannels for small fluid volume handling. These devices are used in medicine, chemistry, and biotechnology applications but a large diffusion is limited due to the manufacturing cost of traditional processes. Additive Manufacturing offers affordable alternatives for the production of microfluidic devices, because the fabrication of embedded micrometric channels is enabled. Stereolithography gained particular attention due to the low cost of both available machines and suitable polymeric materials to be processed. The main restriction to the adoption of this technique comes from the obtainable dimensional accuracy that depends not only on design, but also on process set-up. Firstly, the paper analyses theoretically the physics of stereolithographic processes and focuses on main phenomena related to microchannel manufacturing. Then, specific experimental activities are designed to investigate the combined effect of design and process parameters on the achievable dimensional accuracy of embedded microchannels manufactured through a commercial desktop stereolithography apparatus. In particular, the combined effect of channel nominal dimensions, build orientations and the layer thickness on the obtainable accuracy is examined by referring to a benchmark geometry. The collated experimental data showed that a number of combinations are successful. Besides, the experimental activity revealed that appropriate combinations of design, build orientation and manufacturing parameters can overcome the dimensional limitations reported in previous studies. Both binary logistic regression models to predict the manufacturability of microchannels and linear regression models to estimate the achievable accuracy for those geometries that can be produced successfully are developed.

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Dolz, Mark S., Stephen J. Cina et Roger Smith. « Stereolithography ». American Journal of Forensic Medicine and Pathology 21, n^o 2 (juin 2000) : 119–23. http://dx.doi.org/10.1097/00000433-200006000-00005.

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Hidalgo, Hector Malagon, Gabriela Wong Romo et Roberto Takeo Rivera Estolano. « Stereolithography ». Journal of Craniofacial Surgery 20, n^o 5 (septembre 2009) : 1473–77. http://dx.doi.org/10.1097/scs.0b013e3181b09a70.

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Fu, Yijia, Wendong Li, Man Xu, Chao Wang, Liyuan Zhang et Guanjun Zhang. « Dielectric Properties and 3D-Printing Feasibility of UV-Curable Resin/Micron Ceramic Filler Composites ». Advances in Polymer Technology 2022 (27 février 2022) : 1–14. http://dx.doi.org/10.1155/2022/9483642.

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To prepare high-permittivity composite materials for dielectrically functional gradient materials (d-FGMs) by the stereolithographic 3D-printing technique, three ceramic powders (i.e., alumina, barium titanate, and strontium titanate) are selected as functional fillers for a UV-curable resin matrix. The viscosity and UV curing depth of the uncured slurry are tested for feasibility of 3D printing. Comprehensive electrical properties, including volume resistivity, permittivity, dielectric loss, and breakdown strength of the cured composites are measured. The effects of the filler types, morphologies, particle sizes, and volume fractions on the UV curing characteristics of the slurry and dielectric properties of cured composites are systematically analyzed. The experimental results show that spherical fillers with large particle sizes, smooth surfaces, and high permittivity are conducive for reducing the slurry viscosity, increasing curing depth and adjusting the composite’s permittivity over a wide range. We believe that the proposed strategy for material system establishment can improve the 3D printability of high-permittivity composites and promote other applications of the d-FGMs by the stereolithography technique.

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Kirihara, Soshu. « Stereolithographic Additive Manufacturing of Diamond Photonic Crystal Composed of Titania and Alumina Micro Lattices ». Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2015, CICMT (1 septembre 2015) : 000314–21. http://dx.doi.org/10.4071/cicmt-tha32.

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Three dimensional micro photonic crystals with a diamond structure made of a dense titania and alumina were fabricated successfully by using stereolithographic additive manufacturing. Photonic band gap properties were investigated in gigahertz and terahertz wave frequency ranges. Acrylic diamond lattice structures with nanometer sized particles of titania and alumina dispersion at 40 vol. % were fabricated by the stereolithography. The forming accuracy was 10 μm. After dewaxing and sintering process, the titania and alumina diamond lattice structures were obtained. The relative density reached above 98 %. Electromagnetic wave transmittances were measured by using a W-band millimeter waveguide connected with a network analyzer and a terahertz wave time domain spectroscopy. In the transmission spectra for the Γ-X <100> direction, a forbidden band was observed at 90 – 110 GHz and 0.4 – 0.6 THz. The band gap frequencies well agreed with calculated results by plane wave expansion (PWE) method. Additionally, simulated results by transmission line modeling (TLM) method indicated that a localized mode can be obtained by introducing a plane defect between twinned diamond lattice structures.

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Hartmann, Malte, Markus Pfaffinger et Jürgen Stampfl. « Lithography-Based Ceramic Manufacturing (LCM) for Dental Applications ». Materials Science Forum 939 (novembre 2018) : 95–103. http://dx.doi.org/10.4028/www.scientific.net/msf.939.95.

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Dental applications like crowns, veneers or bridges require high accuracy to be fitted on the patient’s stump. Stereolithography is an additive manufacturing method, which offers high precision by using light exposure as the layer generating mechanism. In the LCM process, this precision is combined with a thermal post-processing step to achieve full ceramic restorations. The overall production of such ceramic parts in a reproducible way is a highly complex procedure. The first requirement is to find a slurry formulation, which is stable against sedimentation and segregation, that is also processable in a stereolithographic system. Such a formulation has been found by us, which could be shown by rheology measurements. During experiments with this formulation, it could be observed that there is a correlation between wet film thickness and resolution. Several adjustments to the machine have been made, to fully control this parameter. Namely, changes to the vat, the doctor blade and the building platform have been made. The improvement of the process and the quality of the final parts are validated by fabricating Siemens stars and by biaxial bending tests.

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Hsu, Huang Jan, Shyh Yuan Lee et Cho-Pei Jiang. « Development of Maskless-Curing Slurry Stereolithography for Fabricating High Strength Ceramic Parts ». Applied Mechanics and Materials 575 (juin 2014) : 214–18. http://dx.doi.org/10.4028/www.scientific.net/amm.575.214.

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The aim of this study is to develop a novel maskless-curing slurry stereolithograhy and sintering process which can fabricate high strength ceramic parts. Three dimension printing of additive manufacturing method was used. High performance stereolithography slurry, which was composed of zirconia powder as structure material and methanol as a solvent and a dispersant, could be prepared with colloidal processing. During layer casting, the diaphanous slurry can penetrate into pores of the subjacent layers. After drying, the binder in the penetrated liquid could connect the fresh layer and subjacent layers. Eventually, a gel-like green block could be built layer by layer. In the exposed region, the resin contained in the green block was cured to connect the zirconia powders to be a part of the rigid green part. The obtained rigid green part was then heated up to 300°C for binder burnout, and then sintered at 1350°C to obtain a high dense zirconia ceramic part. The proposed method of maskless-curing slurry was briefly described and it was proved that the good capacity of solidifying thin layer.

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Kumta, Samir, Monica Kumta, Leena Jain, Shrirang Purohit et Rani Ummul. « A novel 3D template for mandible and maxilla reconstruction : Rapid prototyping using stereolithography ». Indian Journal of Plastic Surgery 48, n^o 03 (septembre 2015) : 263–73. http://dx.doi.org/10.4103/0970-0358.173123.

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ABSTRACT Introduction: Replication of the exact three-dimensional (3D) structure of the maxilla and mandible is now a priority whilst attempting reconstruction of these bones to attain a complete functional and aesthetic rehabilitation. We hereby present the process of rapid prototyping using stereolithography to produce templates for modelling bone grafts and implants for maxilla/mandible reconstructions, its applications in tumour/trauma, and outcomes for primary and secondary reconstruction. Materials and Methods: Stereolithographic template-assisted reconstruction was used on 11 patients for the reconstruction of the mandible/maxilla primarily following tumour excision and secondarily for the realignment of post-traumatic malunited fractures or deformity corrections. Data obtained from the computed tomography (CT) scans with 1-mm resolution were converted into a computer-aided design (CAD) using the CT Digital Imaging and Communications in Medicine (DICOM) data. Once a CAD model was constructed, it was converted into a stereolithographic format and then processed by the rapid prototyping technology to produce the physical anatomical model using a resin. This resin model replicates the native mandible, which can be thus used off table as a guide for modelling the bone grafts. Discussion: This conversion of two-dimensional (2D) data from CT scan into 3D models is a very precise guide to shaping the bone grafts. Further, this CAD can reconstruct the defective half of the mandible using the mirror image principle, and the normal anatomical model can be created to aid secondary reconstructions. Conclusion: This novel approach allows a precise translation of the treatment plan directly to the surgical field. It is also an important teaching tool for implant moulding and fixation, and helps in patient counselling.

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Arnold, Christin, Delf Monsees, Jeremias Hey et Ramona Schweyen. « Surface Quality of 3D-Printed Models as a Function of Various Printing Parameters ». Materials 12, n^o 12 (19 juin 2019) : 1970. http://dx.doi.org/10.3390/ma12121970.

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Although 3D-printing is common in dentistry, the technique does not produce the required quality for all target applications. Resin type, printing resolution, positioning, alignment, target structure, and the type and number of support structures may influence the surface roughness of printed objects, and this study investigates the effects of these variables. A stereolithographic data record was generated from a master model. Twelve printing processes were executed with a stereolithography Desktop 3D Printer, including models aligned across and parallel to the printer front as well as solid and hollow models. Three layer thicknesses were used, and in half of all processes, the models were inclined at 15°. For comparison, eight gypsum models and milled polyurethane models were manufactured. The mean roughness index of each model was determined with a perthometer. Surface roughness values were approximately 0.65 µm (master), 0.87–4.44 µm (printed), 2.32–2.57 µm (milled), 1.72–1.86 µm (cast plaster/alginate casting), and 0.98–1.03 µm (cast plaster/polyether casting). The layer height and type and number of support structures influenced the surface roughness of printed models (p ≤ 0.05), but positioning, structure, and alignment did not.

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Hull, Chuck. « On Stereolithography ». Virtual and Physical Prototyping 7, n^o 3 (septembre 2012) : 177. http://dx.doi.org/10.1080/17452759.2012.723409.

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Huang, Jigang, Qin Qin et Jie Wang. « A Review of Stereolithography : Processes and Systems ». Processes 8, n^o 9 (11 septembre 2020) : 1138. http://dx.doi.org/10.3390/pr8091138.

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Being the earliest form of additive manufacturing, stereolithography (SLA) fabricates 3D objects by selectively solidifying the liquid resin through a photopolymerization reaction. The ability to fabricate objects with high accuracy as well as a wide variety of materials brings much attention to stereolithography. Since its invention in the 1980s, SLA underwent four generations of major technological innovation over the past 40 years. These innovations have thus resulted in a diversified range of stereolithography systems with dramatically improved resolution, throughput, and materials selection for creating complex 3D objects and devices. In this paper, we review the four generations of stereolithography processes, which are scanning, projection, continuous and volumetric stereolithography. For each generation, representative stereolithography system configurations are also discussed in detail. In addition, other derivative technologies, such as scanning–projection, multi-material, and magnetically assisted stereolithography processes, are also included in this review.

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Tasaki, Satoko, Naoki Komori et Soshu Kirihara. « Fabrication of Oxide Ceramics Dendrites for Porous Electrodes by Using Stereolithography ». Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (1 septembre 2012) : 000152–57. http://dx.doi.org/10.4071/cicmt-2012-tp34.

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Porous oxide ceramics such as zinc oxide are applied for dye sensitized solar cell. This device requires consideration of high surface area, mechanical strengths and porous networks. Thus, we focused on the dendrite structures constructed from micrometer order rods with coordination numbers of 4, 8, and 12. There perfectly controlled structures were fabricated by stereolithography. Variations of the aspect ratios (lattice length to diameter ratios) were adjusted to control the porosity in the range 50–80 vol. % by using computer graphic software. The dendrite models sliced into a series of cross sectional patterns with uniform thickness by using a stereolithographic file format convertor. These numerical data were transferred into the micro processing equipment. High viscosity slurry material was prepared by mixing oxide ceramic powder and photosensitive acrylic resin. This slurry was spread on a flat stage and smoothed. An ultraviolet laser beam was exposed over the deposited layer to create cross-sectional planes. Through layer-by-layer processes, solid components were fabricated. These precursors were dewaxed at 600°C for 2 h at a heating rate of 1.0°C/min and sintered at 1400°C for 2 h at a heating rate of 5.0°C/min in air. The oxide ceramics microstructure was observed using a scanning electron microscope.

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Pham, D. T., et C. Ji. « Design for stereolithography ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 214, n^o 5 (1 mai 2000) : 635–40. http://dx.doi.org/10.1243/0954406001523650.

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This paper analyses the causes of errors in stereolithography with a view to deriving methods to compensate for those errors. Two types of errors are discussed: those due to the process of approximating the part and those arising during the building and finishing of the part. Design rules are proposed to reduce or eliminate both kinds of errors and thus increase the suitability of stereolithography as a technology for rapid tooling.

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MARUO, Shoji. « Micro/Nano Stereolithography ». Journal of the Society of Mechanical Engineers 118, n^o 1154 (2015) : 26–29. http://dx.doi.org/10.1299/jsmemag.118.1154_26.

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Schaub, Diane A., Kou-Rey Chu et Douglas C. Montgomery. « Optimizing stereolithography throughput ». Journal of Manufacturing Systems 16, n^o 4 (janvier 1997) : 290–303. http://dx.doi.org/10.1016/s0278-6125(97)89099-1.

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Zissi, S., A. Bertsch, J. Y. Jézéquel, S. Corbel, D. J. Lougnot et J. C. André. « Stereolithography and microtechniques ». Microsystem Technologies 2, n^o 1 (mars 1995) : 97–102. http://dx.doi.org/10.1007/bf02739538.

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Stevens, Adam G., C. Ryan Oliver, Matthieu Kirchmeyer, Jieyuan Wu, Lillian Chin, Erik S. Polsen, Chad Archer, Casey Boyle, Jenna Garber et A. John Hart. « Conformal Robotic Stereolithography ». 3D Printing and Additive Manufacturing 3, n^o 4 (décembre 2016) : 226–35. http://dx.doi.org/10.1089/3dp.2016.0042.

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LEE, KWANG-SUP, RAN HEE KIM, PREM PRABHAKARAN, DONG-YOL YANG, TAE WOO LIM et SANG HU PARK. « TWO-PHOTON STEREOLITHOGRAPHY ». Journal of Nonlinear Optical Physics & ; Materials 16, n^o 01 (mars 2007) : 59–73. http://dx.doi.org/10.1142/s021886350700355x.

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Two-photon stereolithography based on photopolymerization provides the ability to fabricate real three-dimensional (3D) microstructures beyond the resolution of focal size. In this paper, our recent research focusing on improvement of spatial resolution in two-photon stereolithography is reviewed. The influence of system and fabrication conditions in relation to the spatial resolution is discussed. For small and low aspect ratio voxels, a minimum power and minimum exposure time (MPMT) scheme is introduced. During the two-photon process, an ascending technique, wherein the truncation amount of volumetric pixels is controlled, can be applied to improve the resolution of two-dimensional patterns. 3D Microfabrication with less than 100 nm resolution can be realized by using the radical quenching effect. After the two-photon process, the resolution of fabricated patterns can be refined to 60 nm by post-processing of plasma ashing.

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Choi, Jae-Won, Ho-Chan Kim et Ryan Wicker. « Multi-material stereolithography ». Journal of Materials Processing Technology 211, n^o 3 (mars 2011) : 318–28. http://dx.doi.org/10.1016/j.jmatprotec.2010.10.003.

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Zissi, S., A. Bertsch, J. Y. Jézéquel, S. Corbel, D. J. Lougnot et J. C. André. « Stereolithography and microtechniques ». Microsystem Technologies 2, n^o 2 (15 février 1996) : 97–102. http://dx.doi.org/10.1007/s005420050023.

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Zissi, S., A. Bertsch, J. Y. Jézéquel, S. Corbel, D. J. Lougnot et J. C. André. « Stereolithography and microtechniques ». Microsystem Technologies 2, n^o 2 (mai 1996) : 97–102. http://dx.doi.org/10.1007/bf02447758.

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Spirrett, Fiona, Tatsuya Ito et Soshu Kirihara. « High-Speed Alumina Stereolithography ». Applied Sciences 12, n^o 19 (28 septembre 2022) : 9760. http://dx.doi.org/10.3390/app12199760.

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The additive manufacturing of ceramics offers a reliable and repeatable method for fabricating parts with complex geometries. To compete with conventional ceramic forming methods, the time and cost associated with material and process optimization for ceramic stereolithography should be improved. Computational analysis methods can be utilized to reduce the number of experimental steps required for material and process optimization. This work used the discrete element method and ray tracing analyses to predict suitable material parameters and processing conditions for ceramic stereolithography. The discrete element method was used to create alumina particle dispersion models to predict suitable paste compositions, and ray tracing was used to predict suitable laser power and scan speed to achieve a sufficient curing depth for stereolithography processing. The predicted conditions of paste composition and processing parameters were comparable to experimental values, reducing the number of experimental iterations required for process optimization. Furthermore, suitable processing parameters for high-speed fabrication by stereolithography was predicted, achieving a processing speed much faster than previously reported ceramic stereolithography. The reduction in process optimization timeline, and the increase in fabrication speed, could increase the appeal of ceramic stereolithography to industry.

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AOKI, Yuya, Satoshi YANAGI, Akihiko KUBO, Jun'ichi TAMAKI, Takao KAMEDA et A. M. M. Sharif Ullah. « 3290 3D Reproduction of a Snow Crystal by Stereolithography ». Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2011.6 (2011) : _3290–1_—_3290–4_. http://dx.doi.org/10.1299/jsmelem.2011.6._3290-1_.

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YAMAZAWA, Kenji, et Toshiki NIINO. « 3365 Proposal of High Speed Raster Scanning in Stereolithography ». Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2011.6 (2011) : _3365–1_—_3365–4_. http://dx.doi.org/10.1299/jsmelem.2011.6._3365-1_.

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Wang, Ying Ying, Ling Li, Zai Yi Wang, Fu Tian Liu, Jia Hui Zhao, Ping Ping Zhang et Chun Lu. « Fabrication of Dense Silica Ceramics through a Stereo Lithography-Based Additive Manufacturing ». Solid State Phenomena 281 (août 2018) : 456–62. http://dx.doi.org/10.4028/www.scientific.net/ssp.281.456.

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Silica ceramics were fabricated via an additive manufacturing process based on stereolithography. Ceramic suspension with low viscosity and high solid loading is of importance to stereolithography based UV-curable. In this work, to meet the requirements of stereolithography, effects of temperature, additive content and ball-milling time on the viscosity of silica slurry were investigated, and properties of silica ceramics sintered at different temperature were also researched.The results show that increasing temperatures strongly decrease the viscosity unless when the temperature is above 70°C. The minimum of viscosity was observed for an appropriate addition of dispersant, which is corresponding to the best dispersion state of silica particles in the photopolymerizable monomer. And optimizing ball-milling time showed the lowest viscosity suitable for the stereolithography process. The appropriate temperature, additive content and ball-milling time facilitating stereolithography was 70°C, 2% and 60min respectively. The prepared ceramics sintered at 1220°C showed a density and flexural strength of 1.57g/cm3 and 13.31MPa respectively.

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Au, Anthony K., Wonjae Lee et Albert Folch. « Mail-order microfluidics : evaluation of stereolithography for the production of microfluidic devices ». Lab Chip 14, n^o 7 (2014) : 1294–301. http://dx.doi.org/10.1039/c3lc51360b.

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We explore the three-dimensional capabilities, resolution, and optical clarity of microfluidic devices fabricated by stereolithography using a mail-order service, and we compare the cost and prototyping speed of soft lithography with those of stereolithography.

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Tasaki, Satoko, et Soshu Kirihara. « Zinc Oxide Modeling to Create Semiconductor Dendrites by Using Micro Stereolithography ». Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2011, CICMT (1 septembre 2011) : 000193–98. http://dx.doi.org/10.4071/cicmt-2011-wa24.

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Zinc oxide ceramics exhibit various semiconductor properties through optimized elements or materials doping. The elements doping of aluminum or gallium can control the electric conductivity, and composites doping of indium and rare earth such as yttrium can increase the thermoelectric conversion efficiency. In this investigation, dendritic lattice structures of the zinc oxide semiconductors with periodically ordered arrangements or self similar patterns were fabricated successfully to increase the surfaces area and porosity values by using micro patterning stereolithography of a computer aided design and manufacturing. These semiconductor dendrites with penetrable paths and extensive interfaces will be used for fluid and heat flow receptors and applied to the novel sensor devices and energy generators. The dendritic lattice models sliced into a series of cross sectional patterns with uniform thickness by using a stereolithographic file format convertor. These numerical data were transferred into the micro processing equipment. High viscosity slurry material was prepared through the mixing of photo sensitive acrylic resin and the zinc oxide particle at 30 % in volume fraction. The slurry was supplied on a flat substrate with 8 μm in layer thickness by using a mechanical knife edge. The cross sectional image was exposed on the slurry surface by using digital micro mirror devices. Through the layer by layer processes, the solid component was obtained with micrometer order part accuracies. The dense ceramic sample was purchase after de-waxing and sintering process.

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MARUO, Shoji. « Advanced Micro/Nano Stereolithography ». JOURNAL OF THE JAPAN WELDING SOCIETY 83, n^o 4 (2014) : 254–57. http://dx.doi.org/10.2207/jjws.83.254.

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Arnold, J. Barto, et Marc L. M. McAllister. « Artefact replication by stereolithography ». International Journal of Nautical Archaeology 27, n^o 2 (mai 1998) : 160–65. http://dx.doi.org/10.1111/j.1095-9270.1998.tb00799.x.

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Wohlers, Terry. « Stereolithography—A historical perspective ». Virtual and Physical Prototyping 7, n^o 3 (septembre 2012) : 179. http://dx.doi.org/10.1080/17452759.2012.723410.

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Clair, J. J. « Two laser stereolithography technique ». Pure and Applied Optics : Journal of the European Optical Society Part A 2, n^o 3 (mai 1993) : 169–72. http://dx.doi.org/10.1088/0963-9659/2/3/001.

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Clair, J. J., et A. Landraud-Lamole. « Stereolithography and 3D storage ». Pure and Applied Optics : Journal of the European Optical Society Part A 3, n^o 5 (septembre 1994) : 705–8. http://dx.doi.org/10.1088/0963-9659/3/5/001.

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Renap, K., et J. P. Kruth. « Recoating issues in stereolithography ». Rapid Prototyping Journal 1, n^o 3 (septembre 1995) : 4–16. http://dx.doi.org/10.1108/13552549510094223.

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Allen Brady, G., et John W. Halloran. « Stereolithography of ceramic suspensions ». Rapid Prototyping Journal 3, n^o 2 (juin 1997) : 61–65. http://dx.doi.org/10.1108/13552549710176680.

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Sinn, Douglas P., Joseph E. Cillo et Brett A. Miles. « Stereolithography for Craniofacial Surgery ». Journal of Craniofacial Surgery 17, n^o 5 (septembre 2006) : 869–75. http://dx.doi.org/10.1097/01.scs.0000230618.95012.1d.

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ARNOLDIII, J., et M. MCALLISTER. « Artefact replication by stereolithography ». International Journal of Nautical Archaeology 27, n^o 2 (mai 1998) : 160–65. http://dx.doi.org/10.1016/s1057-2414(98)80072-1.

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Foroutan, M., B. Fallahi, S. Mottavalli et M. Dujovny. « Stereolithography : application to neurosurgery ». Critical Reviews in Neurosurgery 8, n^o 4 (20 juillet 1998) : 203–8. http://dx.doi.org/10.1007/s003290050078.

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Skoog, Shelby A., Peter L. Goering et Roger J. Narayan. « Stereolithography in tissue engineering ». Journal of Materials Science : Materials in Medicine 25, n^o 3 (4 décembre 2013) : 845–56. http://dx.doi.org/10.1007/s10856-013-5107-y.

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Pham, D. T., S. S. Dimov et R. S. Gault. « Part Orientation in Stereolithography ». International Journal of Advanced Manufacturing Technology 15, n^o 9 (29 août 1999) : 674–82. http://dx.doi.org/10.1007/s001700050118.

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Frigione, M., et F. Montagna. « APPLICATION IN CULTURAL HERITAGE OF STEREOLITOGRAPHY TECHNIQUES FOR THE 3D REPRODUCTION ». International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-M-2-2023 (24 juin 2023) : 607–12. http://dx.doi.org/10.5194/isprs-archives-xlviii-m-2-2023-607-2023.

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Abstract. With the use of stereolithography, one of the most widespread and old rapid prototyping techniques, it is possible to reproduce objects, damaged or missing parts, faithful replicas of interest in the field of Cultural Heritage. In this work, some of the applications of the stereolithography technique to replicate objects or missing parts of artistic or cultural interest, are illustrated. The aim of the Authors is to highlight the potential, the advantages, and also the limits if any, of this technique when applied in the field of Cultural Heritage for various needs, reporting some real cases of objects obtained in the laboratory with stereolithography.

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Wen, Cheng, Zhengda Chen, Zhuoxi Chen, Bin Zhang, Zhicheng Cheng, Hao Yi, Guiyun Jiang et Jigang Huang. « Improvement of the Geometric Accuracy for Microstructures by Projection Stereolithography Additive Manufacturing ». Crystals 12, n^o 6 (9 juin 2022) : 819. http://dx.doi.org/10.3390/cryst12060819.

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Projection stereolithography creates 3D structures by projecting patterns onto the surface of a photosensitive material layer by layer. Benefiting from high efficiency and resolution, projection stereolithography 3D printing has been widely used to fabricate microstructures. To improve the geometric accuracy of projection stereolithography 3D printing for microstructures, a compensation method based on structure optimization is proposed according to mathematical analysis and simulation tests. The performance of the proposed compensation method is verified both by the simulation and the 3D printing experiments. The results indicate that the proposed compensation method is able to significantly improve the shape accuracy and reduce the error of the feature size. The proposed compensation method is also proved to improve the dimension accuracy by 21.7%, 16.5% and 19.6% for the circular, square and triangular bosses respectively. While the improvements on the dimension accuracy by 16%, 17.6% and 13.8% for the circular, square and triangular holes are achieved with the proposed compensation method. This work is expected to provide a method to improve the geometric accuracy for 3D printing microstructures by projection stereolithography.

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Chen, Qirong, Franziska Schmidt, Oliver Görke, Anila Asif, Joachim Weinhold, Erfan Aghaei, Ihtesham ur Rehman, Aleksander Gurlo et Asma Tufail Shah. « Ceramic Stereolithography of Bioactive Glasses : Influence of Resin Composition on Curing Behavior and Green Body Properties ». Biomedicines 10, n^o 2 (7 février 2022) : 395. http://dx.doi.org/10.3390/biomedicines10020395.

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Herein we report on the preparation of a bioactive glass (BAG)-based photocurable resin for the additive manufacturing of BAG scaffolds with high filler loadings. The preparation of glass/ceramics resins for stereolithography with high filler loading is always a challenge, especially for fillers with a high refractive index variance. Various photocurable resin compositions with and without bioactive glass fillers have been investigated to see the influence of bioactive glass on physical properties of the resin and resulting green body. The effect of concentration of monomers, reactive diluent, light absorber (Sudan orange G dye), photoinitiator (PI), non-reactive diluent, and fillers (BAG) on rheology and photocuring behavior of the resin and tomography of the resulting 3D structures have been investigated. The BAG contents affect the rheology of resin and influence the rate of the polymerization reaction. The resin compositions with 55–60% BAG, 10% PEG-200 (diluent), 1% of PI and 0.015% of the dye were found to be suitable compositions for the stereolithographic fabrication. A higher percentage of PI caused over-curing, while a higher amount of dye decreased the cure depth of the resin. The micro-computed tomography (µ-CT) and scanning electron microscopic (SEM) images of the resulting green bodies display a relatively dense glass scaffold without any visible cracks and good interlayer connection and surface finishing. These properties play an important role in the mechanical behavior of 3D scaffolds. This study will be helpful to prepare high density glass/ceramic slurries and optimize their printing properties.

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