Porous Talcum-Based Steatite Ceramics Fabricated by the Admixture of Organic Particles: Experimental Characterization and Effective Medium/Field Modeling of Thermo-Mechanical Properties

Pichler, Christian; Perfler, Lukas; Traxl, Roland; Lackner, Roman

doi:10.3390/ma16124420

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Porous Talcum-Based Steatite Ceramics Fabricated by the Admixture of Organic Particles: Experimental Characterization and Effective Medium/Field Modeling of Thermo-Mechanical Properties

University of Innsbruck, Material Technology Innsbruck, Technikerstraße 13, A-6020 Innsbruck, Austria

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Materials 2023, 16(12), 4420; https://doi.org/10.3390/ma16124420

Submission received: 25 April 2023 / Revised: 9 June 2023 / Accepted: 13 June 2023 / Published: 15 June 2023

(This article belongs to the Section Porous Materials)

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Abstract

In this paper, an experimental campaign, as regards the thermo-mechanical properties (heat capacity, thermal conductivity, Young’s modulus, and tensile (bending) strength) of talcum-based steatite ceramics with artificially introduced porosity, is presented. The latter has been created by adding various amounts of an organic pore-forming agent, almond shell granulate, prior to compaction and sintering of the green bodies. The so-obtained porosity-dependent material parameters have been represented by homogenization schemes from effective medium/effective field theory. As regards the latter, thermal conductivity and elastic properties are well described by the self-consistent estimate, with effective material properties scaling in a linear manner with porosity, with the latter in the range of 1.5 vol-%, representing the intrinsic porosity of the ceramic material, to 30 vol-% in this study. On the other hand, strength properties are, due to the localization of the failure mechanism in the quasi-brittle material, characterized by a higher-order power-law dependency on porosity.

Keywords: steatite ceramics; Young’s modulus; bending strength; thermal conductivity; porosity; modeling

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MDPI and ACS Style

Pichler, C.; Perfler, L.; Traxl, R.; Lackner, R. Porous Talcum-Based Steatite Ceramics Fabricated by the Admixture of Organic Particles: Experimental Characterization and Effective Medium/Field Modeling of Thermo-Mechanical Properties. Materials 2023, 16, 4420. https://doi.org/10.3390/ma16124420

AMA Style

Pichler C, Perfler L, Traxl R, Lackner R. Porous Talcum-Based Steatite Ceramics Fabricated by the Admixture of Organic Particles: Experimental Characterization and Effective Medium/Field Modeling of Thermo-Mechanical Properties. Materials. 2023; 16(12):4420. https://doi.org/10.3390/ma16124420

Chicago/Turabian Style

Pichler, Christian, Lukas Perfler, Roland Traxl, and Roman Lackner. 2023. "Porous Talcum-Based Steatite Ceramics Fabricated by the Admixture of Organic Particles: Experimental Characterization and Effective Medium/Field Modeling of Thermo-Mechanical Properties" Materials 16, no. 12: 4420. https://doi.org/10.3390/ma16124420

APA Style

Pichler, C., Perfler, L., Traxl, R., & Lackner, R. (2023). Porous Talcum-Based Steatite Ceramics Fabricated by the Admixture of Organic Particles: Experimental Characterization and Effective Medium/Field Modeling of Thermo-Mechanical Properties. Materials, 16(12), 4420. https://doi.org/10.3390/ma16124420

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Porous Talcum-Based Steatite Ceramics Fabricated by the Admixture of Organic Particles: Experimental Characterization and Effective Medium/Field Modeling of Thermo-Mechanical Properties

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