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Additive manufacturing of Ca–Mg silicate scaffolds supported by flame-synthesized glass microspheres.

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Title: Additive manufacturing of Ca–Mg silicate scaffolds supported by flame-synthesized glass microspheres.
Authors: Kraxner, J.1 (AUTHOR) jozef.kraxner@tnuni.sk, Elsayed, H.2,3 (AUTHOR), Dasan, A.1 (AUTHOR), Hujová, M.1 (AUTHOR), Michálková, M.4 (AUTHOR), Michálek, M.1 (AUTHOR), Bernardo, E.2 (AUTHOR), Galusek, D.1,4 (AUTHOR)
Source: Ceramics International. Apr2022, Vol. 48 Issue 7, p9107-9113. 7p.
Subjects: Bioactive glasses, Viscous flow, Three-dimensional printing, Silicates, Glass, Microspheres, Crystallization
Abstract: Novel manufacturing techniques such as additive manufacturing also referred to as 3D printing hold a critical role in the preparation of novel bioactive three-dimensional glass-ceramic scaffolds. The present paper focuses on the use of Ca–Mg silicates microspheres (Ca 2 MgSi 2 O 7 , i.e. 40 mol% CaO, 20% MgO and 40% SiO 2) for the fabrication of 3D structures by additive manufacturing. In the first step, the crystallization of the åkermanite system was avoided, by feeding nearly fully crystallized precursor powders prepared by conventional melt quenching into oxygen-methane (O 2 /CH 4) torch, and solid glass microspheres (SGMs) with diameters bellow 63 μm were prepared. In the second step, the crystallization was utilized to control the viscous flow of SGMs during firing of reticulated scaffolds, obtained by digital light processing (DLP) of the SGMs suspended in a photocurable acrylate binder. The spheroidal shape facilitated a high solid content, up to 77 wt% of the SGMs in the suspension. After burn-out of the organic binder, a fast sintering treatment at 950 °C, for 30 min, led to scaffolds preserving the macro-porosity from 3D printing model (diamond cell lattice) but with well densified struts. The crystallization of 3D scaffolds during the sintering process led to 3D structures with adequate strength-to-density ratio. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Additive manufacturing of Ca–Mg silicate scaffolds supported by flame-synthesized glass microspheres.
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  Data: <searchLink fieldCode="AR" term="%22Kraxner%2C+J%2E%22">Kraxner, J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jozef.kraxner@tnuni.sk</i><br /><searchLink fieldCode="AR" term="%22Elsayed%2C+H%2E%22">Elsayed, H.</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dasan%2C+A%2E%22">Dasan, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hujová%2C+M%2E%22">Hujová, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Michálková%2C+M%2E%22">Michálková, M.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Michálek%2C+M%2E%22">Michálek, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bernardo%2C+E%2E%22">Bernardo, E.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Galusek%2C+D%2E%22">Galusek, D.</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Apr2022, Vol. 48 Issue 7, p9107-9113. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Bioactive+glasses%22">Bioactive glasses</searchLink><br /><searchLink fieldCode="DE" term="%22Viscous+flow%22">Viscous flow</searchLink><br /><searchLink fieldCode="DE" term="%22Three-dimensional+printing%22">Three-dimensional printing</searchLink><br /><searchLink fieldCode="DE" term="%22Silicates%22">Silicates</searchLink><br /><searchLink fieldCode="DE" term="%22Glass%22">Glass</searchLink><br /><searchLink fieldCode="DE" term="%22Microspheres%22">Microspheres</searchLink><br /><searchLink fieldCode="DE" term="%22Crystallization%22">Crystallization</searchLink>
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  Data: Novel manufacturing techniques such as additive manufacturing also referred to as 3D printing hold a critical role in the preparation of novel bioactive three-dimensional glass-ceramic scaffolds. The present paper focuses on the use of Ca–Mg silicates microspheres (Ca 2 MgSi 2 O 7 , i.e. 40 mol% CaO, 20% MgO and 40% SiO 2) for the fabrication of 3D structures by additive manufacturing. In the first step, the crystallization of the åkermanite system was avoided, by feeding nearly fully crystallized precursor powders prepared by conventional melt quenching into oxygen-methane (O 2 /CH 4) torch, and solid glass microspheres (SGMs) with diameters bellow 63 μm were prepared. In the second step, the crystallization was utilized to control the viscous flow of SGMs during firing of reticulated scaffolds, obtained by digital light processing (DLP) of the SGMs suspended in a photocurable acrylate binder. The spheroidal shape facilitated a high solid content, up to 77 wt% of the SGMs in the suspension. After burn-out of the organic binder, a fast sintering treatment at 950 °C, for 30 min, led to scaffolds preserving the macro-porosity from 3D printing model (diamond cell lattice) but with well densified struts. The crystallization of 3D scaffolds during the sintering process led to 3D structures with adequate strength-to-density ratio. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Microspheres
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      – SubjectFull: Crystallization
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              Text: Apr2022
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              Y: 2022
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