Synthesis, characterization, and processing of cordierite-glass particles modified by coating with an alumina precursor

Sen Mei, Juan Yang, Regina Monteiro, Rodrigo Martins, José M.F. Ferreira

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The surfaces of cordierite and glass particles were modified by coating them with an alumina precursor using a precipitation process in the presence of urea. Scanning electron microscopy (SEM), high-resolution transmission electron microscopy, X-ray diffraction, electrophoresis, and rheological measurements were used to characterize the coated powders. SEM and transmission electron microscopy morphologies of the coated powders revealed that amorphous and homogeneous coatings have been formed around the particles. The morphology of the coated powders showed a coiled wormlike surface. The coating Al2O3 layer dominated the surface properties of the coated glass and cordierite powders. The influence of the coating layer on the processing ability of cordierite-based glass-ceramics substrates by tape casting was studied in aqueous media. It could be concluded that the coating of the powders facilitates the processing and yields green and sintered tapes with denser, more homogeneous microstructures compared with the uncoated powders.

Original languageEnglish
Pages (from-to)155-160
Number of pages6
JournalJournal Of The American Ceramic Society
Volume85
Issue number1
DOIs
Publication statusPublished - Jan 2002

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