Szczegóły publikacji
Opis bibliograficzny
Comprehensive experimental verification and theoretical modeling of cement-free alumina-based castables forming in-situ spinel $(MgAl_{2}O_{4})$ with enhanced thermal shock resistance / Ryszard PROROK, Karina WARMUZ, Dominika MADEJ // Ceramics International ; ISSN 0272-8842 . — Tytuł poprz.: Ceramurgia International ; ISSN: 0390-5519. — 2025 — vol. 51 iss. 25 pt. B, s. 46142-46154. — Bibliogr. s. 46153-46154, Abstr. — Publikacja dostępna online od: 2025-07-23
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 162035 |
|---|---|
| Data dodania do BaDAP | 2025-09-05 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.ceramint.2025.07.325 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Ceramics International |
Abstract
No-cement spinel-forming castable refractories exhibit significantly improved resistance to mechanical and corrosive environments at high temperatures compared to calcium aluminate cement–bonded, spinel-containing monolithic refractories. In the present study, the effects of microsilica, nano-colloidal alumina, and MgO content on thermal shock resistance were investigated. This study involved experimental analysis of modified spinel-forming, alumina-based castable refractories, combined with a theoretical evaluation based on Thermal Shock Resistance (TSR) theory. The analysis was supported by FactSage software, XRD, SEM-EDS, thermal property tests, mechanical tests, and compactness measurements. TSR was evaluated experimentally and expressed using parameters (R, R‴, R⁗, Rst) based on the theories developed by Kingery and Hasselman. Both spinel and silica additions influence thermal shock resistance, as reflected in the theoretical TSR parameters and supported by experimental data on Young's modulus after each thermal shock cycle. Analysis of the TSR parameters shows that increasing the amount of in situ spinel formed improves resistance to crack initiation (R parameter) during thermal shock but deteriorates resistance to crack propagation (R‴ and R⁗ parameters). There is no evidence suggesting that the precursor (nano-colloidal alumina or alumina powder) of the spinel affects the TSR parameters. While silica enhances resistance to crack initiation (R parameter) during thermal shock, it negatively impacts crack propagation resistance (R‴ and R⁗ parameters). This is connected to the glassy phase in which silica is present.
