Acidic pathway in formation of SiO2–AlO2–PO2 geopolymeric ceramic: Investigation of structural evolution and electrical behaviour

Bafti, Arijeta; Rukavina, Marko; Pavić, Luka; Mandić, Vilko (2025) Acidic pathway in formation of SiO2–AlO2–PO2 geopolymeric ceramic: Investigation of structural evolution and electrical behaviour. Ceramics International, 51 (5). pp. 5472-5482. ISSN 0272-8842

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Abstract

The investigation into the acidic pathway in geopolymer formation has been overlooked compared to the alkaline pathway. This study seeks to fill the gap by exploring the development mechanism and electrical properties of this type of geopolymer. The microstructural properties of geopolymer ceramics were assessed through the deconvolution of attenuated total reflectance-Fourier-transform infrared spectra (ATR-FTIR), powder X-ray diffraction (PXRD), scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS), simultaneous thermogravimetric analysis and differential thermal analysis (TGA/DTA). Furthermore, the electrical properties of the prepared ceramics were monitored using solid-state impedance spectroscopy (ss-IS). Maintaining an Al to P molar ratio of 1:1, various post-treatment temperatures (60 °C, 105 °C, 300 °C, 1200 °C) were employed to observe their effects on the (micro)structural properties of the samples under investigation. This ratio ensures the formation of an amorphous structure of SiO2·Al2O3·P2O5·nH2O. Additionally, the emergence of new crystalline aluminium and phosphate phases was observed.

Item Type:	Article
Additional Information:	Prihvacena R1 verzija
Uncontrolled Keywords:	phosphate geopolymer; acidic pathway; ceramics’ electrical properties; thermal evolution; structure-microstructure
Subjects:	NATURAL SCIENCES > Physics NATURAL SCIENCES > Chemistry
Divisions:	Division of Materials Chemistry
Projects:	Project title Project leader Project code Project type Fenomeni na površini tijekom priprave naprednih nanokompozita infiltracijom i funkcionalizacijom poroznih materijala-SLIPPERYSLOPE Vilko Mandić UIP-2019-04-2367 HRZZ Razvoj tehničkog rješenja za uštedu energije upotrebom VIS propusnih ili polupropusnih i IC-reflektivnih tankih slojeva- UNSPECIFIED KK.01.2.1.02.0316 EK
Depositing User:	Luka Pavić
Date Deposited:	09 Jan 2026 14:49
URI:	http://fulir.irb.hr/id/eprint/10633
DOI:	10.1016/j.ceramint.2024.08.326

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