Microstructural Evolution of Calcium-Doped α-Alumina

Effect of different calcium doping levels on the microstructure of high‐purity α‐alumina was studied as a function of sintering time and temperature using scanning electron microscopy (SEM). Microstructural evolution was related to hypothetical calcium excess at the grain boundaries (ΓCa) that was c...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Journal of the American Ceramic Society 2003-04, Vol.86 (4), p.623-29
Hauptverfasser:	Altay, Arzu, Gülgün, Mehmet Ali
Format:	Artikel
Sprache:	eng
Schlagworte:	alumina Applied sciences Building materials. Ceramics. Glasses calcium Ceramic industries Chemical industry and chemicals Exact sciences and technology microstructure Miscellaneous Technical ceramics
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Effect of different calcium doping levels on the microstructure of high‐purity α‐alumina was studied as a function of sintering time and temperature using scanning electron microscopy (SEM). Microstructural evolution was related to hypothetical calcium excess at the grain boundaries (ΓCa) that was calculated assuming zero solubility of calcium in bulk α‐alumina. Under all sintering conditions, grains were uniform in size and equiaxed for low calcium concentrations (
ISSN:	0002-7820 1551-2916
DOI:	10.1111/j.1151-2916.2003.tb03349.x