Please use this identifier to cite or link to this item:
|Title:||Crystallization kinetics of mullite formation in diphasic gels containing different alumina components|
Schmidt, Helmut K.
|Year of Publication:||2003|
|OPUS Source:||Journal of the European Ceramic Society. - 23. 2003, 9, S. 1465-1475|
|SWD key words:||Kristallisation|
|DDC notations:||620 Engineering and machine engineering|
|Publikation type:||Journal Article|
|Abstract:||The crystallization kinetics of mullite formation in diphasic gels containing TEOS-derived amorphous silica and alumina component in different crystalline form and particle size has been studied using quantitative X-ray diffraction (QXRD) with 3:2 mullite as a standard and transmission electron microscopy (TEM). As the source of alumina component, aluminum nitrate nonahydrate, commercial gamma-Al2O3 and boehmite (gamma-AlOOH) were used. The results were consistent with previous studies which indicated that mullite forms initially by nucleation and growth. During the second slow stage of transformation, mullite with approximate 2:1 composition subsequently converts further into 3:2. This process is the fastest in the precursor with the smallest particle size of alumina, and the slowest in the sample with boehmite-derived alumina. In very fine scale of morphology the conversion of 2:1 mullite started even in the first stage of transformation.|
|Link to this record:||urn:nbn:de:bsz:291-scidok-30588|
|Date of registration:||9-Dec-2010|
|Faculty:||SE - Sonstige Einrichtungen|
|Department:||SE - INM Leibniz-Institut für Neue Materialien|
SciDok - Der Wissenschaftsserver der Universität des Saarlandes
Items in SciDok are protected by copyright, with all rights reserved, unless otherwise indicated.