DLP-based light engines for additive manufacturing of ceramic parts

Hatzenbichler, Markus; Geppert, M.; Gruber, Simon; Ipp, E.; Almedal, R.; Stampfl, Juergen

doi:10.1117/12.907113

Cited by 13 publications

(10 citation statements)

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“…This methodology Table 1. Material properties of different ceramics achieved with lithography-based ceramic manufacturing (LCM) [1,[9][10][11][12][13]. Furthermore, LCM provides the best resolution when compared with other binder-based methods [14].…”

Section: Introductionmentioning

confidence: 99%

Stereolithographic Additive Manufacturing of High Precision Glass Ceramic Parts

et al. 2020

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Lithography based additive manufacturing (AM) is one of the most established and widely used 3D-printing processes. It has enabled the processing of many different materials from thermoplast-like polymers to ceramics that have outstanding feature resolutions and surface quality, with comparable properties of traditional materials. This work focuses on the processing of glass ceramics, which have high optical demands, precision and mechanical properties specifically suitable for dental replacements, such as crowns. Lithography-based ceramic manufacturing (LCM) has been chosen as the optimal manufacturing process where a light source with a defined wavelength is used to cure and structure ceramic filled photosensitive resins. In the case of glass ceramic powders, plastic flow during thermal processing might reduce the precision, as well as the commonly observed sintering shrinkage associated with the utilized temperature program. To reduce this problem, particular sinter structures have been developed to optimize the precision of 3D-printed glass ceramic crowns. To evaluate the precision of the final part, testing using digitizing methods from optical to tactile systems were utilized with the best results were obtained from micro computed tomography (CT) scanning. These methods resulted in an optimized process allowing for possible production of high precision molar crowns with dimensional accuracy and high reproducibility.

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Section: Introductionmentioning

confidence: 99%

Stereolithographic Additive Manufacturing of High Precision Glass Ceramic Parts

et al. 2020

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“…DLP is basically a dynamic mask lithography technology containing a LED light source and a digital micro mirror device chip (DMD chip), together called a light engine. 16 With the help of the DMD chip, a building area consisting of up to 1920 9 1200 pixels (WUXGA resolution) can be created. As each mirror pixel can be addressed separately, the optical mask is controllable in terms of its geometrical exposure information and time.…”

Section: Methodsmentioning

confidence: 99%

“…DLP is basically a dynamic mask lithography technology containing a LED light source and a digital micro mirror device chip (DMD chip), together called a light engine . With the help of the DMD chip, a building area consisting of up to 1920 × 1200 pixels (WUXGA resolution) can be created.…”

Section: Methodsmentioning

confidence: 99%

Stereolithographic Ceramic Manufacturing of High Strength Bioactive Glass

Gmeiner¹,

Mitteramskogler²,

Stampfl³

et al. 2014

Int J Applied Ceramic Tech

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Bioactive glasses and glass ceramics like the 45S5 formulation have been studied toward biocompatibility and biodegradability for years. Nevertheless, clinical applications as bone substitute or scaffold material are highly limited because of the often poor mechanical behavior of bioactive glasses. In this study, we are able to provide a new production alternative for 45S5 bioactive glass structures resulting in parts with high density and strength. Using the stereolithographic ceramic manufacturing (SLCM) process, it is possible to additively produce solid bulk glass ceramics as well as delicate scaffold structures. Recent developments in SLCM slurry preparation together with an appropriate selection of raw materials led to 3D parts with a very homogeneous microstructure and a density of about 2.7 g/cm³. Due to the low number and small size of defects, a high biaxial bending strength of 124 MPa was achieved. Weibull distribution also underlines good process control showing a Weibull modulus of 8.6 and a characteristic strength of 131 MPa for the samples tested here. By reaching bending strength values of natural cortical bone, bioactive glasses processed with SLCM could eventually advance to be an interesting bone substitute material even in load‐bearing applications, valuing the huge efforts undertaken to understand their bioactive behavior.

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“…In addition, the stair-stepping can be seen in the developed structure. Furthermore, no delamination or cracking can be noticed in the printed layers [92][93][94][95]. Initial trials on using MicroCLIP process were carried out to fabricate hydroxyapatite (HA) based scaffold with micro-cellular feature, though no de-binding or sintering processes were carried out [96].…”

Section: Vat Polymerisationmentioning

confidence: 99%

Micro-fabrication of ceramics: Additive manufacturing and conventional technologies

et al. 2021

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Ceramic materials are increasingly used in micro-electro-mechanical systems (MEMS) as they offer many advantages such as high-temperature resistance, high wear resistance, low density, and favourable mechanical and chemical properties at elevated temperature. However, with the emerging of additive manufacturing, the use of ceramics for functional and structural MEMS raises new opportunities and challenges. This paper provides an extensive review of the manufacturing processes used for ceramic-based MEMS, including additive and conventional manufacturing technologies. The review covers the micro-fabrication techniques of ceramics with the focus on their operating principles, main features, and processed materials. Challenges that need to be addressed in applying additive technologies in MEMS include ceramic printing on wafers, post-processing at the micro-level, resolution, and quality control. The paper also sheds light on the new possibilities of ceramic additive micro-fabrication and their potential applications, which indicates a promising future.

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DLP-based light engines for additive manufacturing of ceramic parts

Cited by 13 publications

References 0 publications

Stereolithographic Additive Manufacturing of High Precision Glass Ceramic Parts

Stereolithographic Additive Manufacturing of High Precision Glass Ceramic Parts

Stereolithographic Ceramic Manufacturing of High Strength Bioactive Glass

Micro-fabrication of ceramics: Additive manufacturing and conventional technologies

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