Effect of chemical composition on the sintering of mullite powders obtained by {gamma}-Al{sub 2}O{sub 3} and kaolin
Conference
·
OSTI ID:99174
- Univ. of S. Carlos, S. Paulo (Brazil)
The effects of different alumina content on sintering behaviour of mullite powder obtained by reaction sintering of a mixture of {gamma}-Al{sub 2}O{sub 3} and kaolin powders have been studied by using scanning electron microscopy, X-ray diffraction and apparent density measurements. Mullitization temperature was not changed with the composition of the samples. The XRD patterns of the powders with 68,0, 71,8 and 76wt% Al{sub 2}O{sub 3}, sintered above 1623K for 360s showed only the mullite phase. The sintered density of the powders increased with Al{sub 2}O{sub 3} content. The microstructural evolution and liquid phase appearance were studied and observed an exaggerated grain growth in the samples with 68,0 and 76MI/o of Al{sub 2}O{sub 3}.
- OSTI ID:
- 99174
- Report Number(s):
- CONF-940911--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sintered mullite from fly ash and alumina powder mixture
Sintering behavior of mullite-containing materials
Densification and microstructure of sodium-doped colloidal mullite
Conference
·
Tue Dec 30 23:00:00 EST 1997
·
OSTI ID:324683
Sintering behavior of mullite-containing materials
Technical Report
·
Fri Nov 30 23:00:00 EST 1979
·
OSTI ID:5643561
Densification and microstructure of sodium-doped colloidal mullite
Journal Article
·
Sun May 01 00:00:00 EDT 1994
· Journal of the American Ceramic Society; (United States)
·
OSTI ID:7114831