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Colloidal processing and characterization of TiO2–MnO-doped alumina/alumina slurries and tapes
Citation Link: https://doi.org/10.15480/882.9588
Publikationstyp
Journal Article
Date Issued
2021-04-07
Sprache
English
TORE-DOI
Volume
3
Issue
4
Start Page
173
End Page
179
Citation
International Journal of Ceramic Engineering and Science 3 (4): 173-179 (2021)
Publisher DOI
Scopus ID
Publisher
Wiley
Aqueous slurries of alumina doped with manganese and titanium oxides were developed. The powders and tapes were investigated by scanning electron (SEM) microscopy, X-ray diffractometry (XRD), and thermal analyses (TG/DSC). The stability and rheology of colloidal suspensions of undoped and doped alumina suspensions were investigated. At neutral pH of 7, pure alumina and MnO–TiO2 dopant particles present positive and negative surface charges and are prone to heterocoagulation. Optimized colloidal processing through proper adjustment of parameters was achieved to reach particle stabilization. The surface charge of the oxide particles was negative, and the suspensions did not agglomerate at a pH of 7 and higher. Tapes were cast, dried, and burned out. The thermal analyses revealed the release of residual water and decomposition of short-chain organics at temperatures under 215°C and of long-chain additives over 300°C.
Subjects
alumina
colloidal processing
manganese oxide
tape casting
titanium dioxide
DDC Class
620.1: Engineering Mechanics and Materials Science
Funding(s)
CAPES/PRINT 88881.310728/2018-0
Funding Organisations
Brazilian Federal Agency for Support and Evaluation of Graduate Education (CAPES)
Publication version
publishedVersion
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Name
Int J Ceramic Engine Sci - 2021 - Daniel Barros - Colloidal processing and characterization of TiO2 MnO‐doped alumina.pdf
Type
Main Article
Size
1.03 MB
Format
Adobe PDF