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Povzetek: Aluminosilicate materials, known for their high strength, corrosion resistance, and thermal stability, are synthesized through the alkali activation of metakaolin, incorporating Sm2O3 to investigate the impact on their physicochemical properties. This study takes a look at the synthesis and physicochemical characterization of aluminosilicate gels doped with samarium(III)-oxide (Sm2O3), focusing on their potential as thermal insulators due to their enhanced thermal conductivity and absorption properties. Two samples with 1% and 5% Sm2O3 by weight were investigated, referred to as S1 and S2, respectively. Characterization techniques such as energy-dispersive X-ray fluorescence spectrometry (EDXRF), diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), scanning electron microscopy (SEM), and photothermal beam deflection (PBD) were employed for the physicochemical characterization of aluminosilicate materials. The structural analysis shows an integration of Sm2O3, which did not significantly affect the gel’s density or porosity but enhanced its thermal conductivity. This study shows the potential of Sm2O3-doped aluminosilicates in applications requiring improved thermal management and stability, positioning them as potentially suitable materials for insulation.
Ključne besede: metakaolin, samarium(III) oxide
Objavljeno v DiRROS: 20.05.2026; Ogledov: 71; Prenosov: 57
Celotno besedilo (2,61 MB)
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Ključne besede: hybrid sol-gel coatings, non-destructive testing, photothermal radiometry, photothermal beam deflection spectrometry, thermal diffusivity, thermal conductivity
Objavljeno v DiRROS: 06.05.2025; Ogledov: 782; Prenosov: 487
Celotno besedilo (1,36 MB)
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Povzetek: This comprehensive review highlights the versatile applications of photothermal techniques, particularly thermal lens spectrometry (TLS) and photoacoustic spectrometry (PAS), in the field of nanomaterials characterization. TLS is an effective technique in the trace detection of different compounds in liquid samples, photodegradation studies, and analysis of photocatalytic reaction rate, as well as the study of molecular dynamics, impacting both environmental and catalytical research. It enables the optimization of thermal diffusivity in soot nanofluids and offers insights into seed germination and plant yield enhancement in nanobiophotonics. The review also explores the thermal and elastic characterization of Fe2O3 polymorphs by photoacoustic spectroscopy (PAS). Investigating the metal mirror demonstrates PAS’s efficacy in determining its reflection coefficient and thermal diffusivity. ZnO nanoparticles’ strong absorption on diatomite surfaces is revealed through PAS, emphasizing their effectiveness in light absorption enhancement. Furthermore, PA techniques address working frequency limitations in studying silicon-based nanomaterials. Thus, thermal lens and photoacoustic spectroscopy assume pivotal roles in unveiling the nuanced attributes of various nanostructured materials, thereby propelling advancements in the realms of science and technology.
Ključne besede: material characterization, thermal lens spectrometry, photoacoustic spectrometry
Objavljeno v DiRROS: 07.08.2024; Ogledov: 1398; Prenosov: 1085
Celotno besedilo (4,59 MB)
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