Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide
Apstrakt
Porous acicular mullite was fabricated by using waste MoSi2 heating element and Al2O3. Careful calcination of the pulverized heating element led to the formation of a mixture of MoO3 and amorphous SiO2. This mixture was employed as both SiO2 precursor and pore former. The oxidation of MoSi2 and mullite formation were studied. The effect of fabrication temperature on phase composition, porosity, grain morphology, and compressive strength of sintered mullite was examined. Pure mullite with porosity of more than 60% and compressive strength of similar to 20 MPa was obtained at temperature as low as 1300 degrees C. The microstructure consisted of elongated, rectangular, prism-like grains which are known to be effective in filtration of diesel engine exhaust. The increase in sintering temperature caused the change of grain morphology and reduction in compressive strength. (C) 2013 Published by Elsevier Ltd.
Ključne reči:
ceramics / oxides / crystal growth / X-ray diffraction / microstructureIzvor:
Materials Research Bulletin, 2014, 50, 155-160Finansiranje / projekti:
- Sinteza, procesiranje i karakterizacija nanostrukturnih materijala za primenu u oblasti energije, mehaničkog inženjerstva, zaštite životne stredine i biomedicine (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45012)
DOI: 10.1016/j.materresbull.2013.10.044
ISSN: 0025-5408; 1873-4227
WoS: 000331920500025
Scopus: 2-s2.0-84888191006
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Bučevac, Dušan AU - Dapcevic, Aleksandra AU - Maksimović, Vesna PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5896 AB - Porous acicular mullite was fabricated by using waste MoSi2 heating element and Al2O3. Careful calcination of the pulverized heating element led to the formation of a mixture of MoO3 and amorphous SiO2. This mixture was employed as both SiO2 precursor and pore former. The oxidation of MoSi2 and mullite formation were studied. The effect of fabrication temperature on phase composition, porosity, grain morphology, and compressive strength of sintered mullite was examined. Pure mullite with porosity of more than 60% and compressive strength of similar to 20 MPa was obtained at temperature as low as 1300 degrees C. The microstructure consisted of elongated, rectangular, prism-like grains which are known to be effective in filtration of diesel engine exhaust. The increase in sintering temperature caused the change of grain morphology and reduction in compressive strength. (C) 2013 Published by Elsevier Ltd. T2 - Materials Research Bulletin T1 - Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide VL - 50 SP - 155 EP - 160 DO - 10.1016/j.materresbull.2013.10.044 ER -
@article{ author = "Bučevac, Dušan and Dapcevic, Aleksandra and Maksimović, Vesna", year = "2014", abstract = "Porous acicular mullite was fabricated by using waste MoSi2 heating element and Al2O3. Careful calcination of the pulverized heating element led to the formation of a mixture of MoO3 and amorphous SiO2. This mixture was employed as both SiO2 precursor and pore former. The oxidation of MoSi2 and mullite formation were studied. The effect of fabrication temperature on phase composition, porosity, grain morphology, and compressive strength of sintered mullite was examined. Pure mullite with porosity of more than 60% and compressive strength of similar to 20 MPa was obtained at temperature as low as 1300 degrees C. The microstructure consisted of elongated, rectangular, prism-like grains which are known to be effective in filtration of diesel engine exhaust. The increase in sintering temperature caused the change of grain morphology and reduction in compressive strength. (C) 2013 Published by Elsevier Ltd.", journal = "Materials Research Bulletin", title = "Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide", volume = "50", pages = "155-160", doi = "10.1016/j.materresbull.2013.10.044" }
Bučevac, D., Dapcevic, A.,& Maksimović, V.. (2014). Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide. in Materials Research Bulletin, 50, 155-160. https://doi.org/10.1016/j.materresbull.2013.10.044
Bučevac D, Dapcevic A, Maksimović V. Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide. in Materials Research Bulletin. 2014;50:155-160. doi:10.1016/j.materresbull.2013.10.044 .
Bučevac, Dušan, Dapcevic, Aleksandra, Maksimović, Vesna, "Porous acicular mullite obtained by controlled oxidation of waste molybdenum disilicide" in Materials Research Bulletin, 50 (2014):155-160, https://doi.org/10.1016/j.materresbull.2013.10.044 . .