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Qi, Jiangtao ; Yan, Wen ; Chen, Zhe ; Schafföner, Stefan ; Zhou, Wenying ; Li, Guangqiang ; Wang, Qiang:
Preparation and characterization of microporous mullite-corundum refractory aggregates with high strength and closed porosity.
In: Ceramics International.
Bd. 46
(2020)
Heft 6
.
- S. 8274-8280.
ISSN 1873-3956
DOI: https://doi.org/10.1016/j.ceramint.2019.12.056
Abstract
Four microporous mullite-corundum refractory aggregates were prepared from Al(OH)3 and kaolinite gangue through an in-situ decomposition synthesis technique. The effect of the compacting pressure (30–150 MPa) on the microstructure and strength were characterized by X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The higher compacting pressure limited the rearrangement of Al(OH)3 pseudomorphs during the reaction sintering process and promoted the reaction between Al(OH)3 and kaolinite gangue, leading to the formation of closed mullite layers on the surface of Al(OH)3 pseudomorphs. The pore size distributions of all four microporous aggregates were bimodal with closed pores (0.1–1.0 μm) located inside of the Al(OH)3 pseudomorphs, whereas open pores (1.0–10.0 μm) were found between the pseudomorphs. When the compacting pressure was 150 MPa, the microporous mullite-corundum refractory aggregates had a high total porosity of 40.5 %, a highly closed porosity of 16.2%, median pore size of only 0.74 μm as well as an excellent compressive strength of 103.2 MPa.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten Fakultäten > Fakultät für Ingenieurwissenschaften Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Keramische Werkstoffe Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Keramische Werkstoffe > Lehrstuhl Keramische Werkstoffe - Univ.-Prof. Dr.-Ing. Stefan Schafföner |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 600 Technik, Medizin, angewandte Wissenschaften 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften |
| Eingestellt am: | 31 Mär 2023 10:08 |
| Letzte Änderung: | 31 Mär 2023 10:08 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/75776 |