Synthesis and characterization of semi-transparent gehlenite ceramic spheres obtained by selective laser sintering

IF 2.7 4区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS Boletin de la Sociedad Espanola de Ceramica y Vidrio Pub Date : 2025-01-01 DOI:10.1016/j.bsecv.2024.09.004
Linda Viviana García-Quiñonez , Adolfo López-Liévano , Adolfo Collado-Hernández , Nora Elizondo-Villarreal , Eden Amaral Rodríguez-Castellanos , Guadalupe Alan Castillo-Rodríguez , Nayely Pineda-Aguilar , José Eduardo Terrazas-Rodríguez , Daniel Fernández-González , Cristian Gómez-Rodríguez
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Abstract

Selective laser sintering (SLS) is a novel additive manufacturing technique that has been recently applied to the sintering of powdered materials. In this work, radiation with laser was applied to a ceramic oxide powder blend to develop semi-transparent ceramic spheres. The powders bed consisted of different ceramics oxides which were irradiated with a continuous CO2 laser (λ = 10.6 μm) with a power density of 155 W/cm2, at both; static (punctually radiated) and non-static (dynamic) conditions. X-ray diffraction confirmed the presence of silicate phases, “gehlenite type”. Punctually radiated samples show semi-spheres with a completely sintered surface without visible cracks, however there were aggregates that did not fuse in the matrix. On the contrary, the use of dynamic radiation decreased the number of aggregates in the ceramic spheres, and a homogeneous sintered surface was obtained. Raman spectra show the introduction of the ceramic oxides into the silica matrix when the powder blend is punctually radiated with laser, while the dynamic parameters aid the crystallization of the silica matrix. Therefore, laser sintering using a continuous laser source with non-static radiation is a better alternative to produce semi-transparent ceramic spheres from a ceramic oxide powder bed with greater densification and better optical properties in transmittance–reflectance.
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来源期刊
Boletin de la Sociedad Espanola de Ceramica y Vidrio
Boletin de la Sociedad Espanola de Ceramica y Vidrio 工程技术-材料科学:硅酸盐
CiteScore
5.50
自引率
2.90%
发文量
72
审稿时长
103 days
期刊介绍: The Journal of the Spanish Ceramic and Glass Society publishes scientific articles and communications describing original research and reviews relating to ceramic materials and glasses. The main interests are on novel generic science and technology establishing the relationships between synthesis, processing microstructure and properties of materials. Papers may deal with ceramics and glasses included in any of the conventional categories: structural, functional, traditional, composites and cultural heritage. The main objective of the Journal of the Spanish Ceramic and Glass Society is to sustain a high standard research quality by means of appropriate reviewing procedures.
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