2012/08/20 by Dorian Hanaor, D. A. H. Hanaor, W. Xu +5
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Advanced ceramic materials synthesis #Anatase #Chemical engineering #Chemistry #Dopant #Doping #Ferroelectric and Piezoelectric Materials #Geochemistry #Geology #Grain boundary #Grain growth #Grain size #Materials Engineering and Processing #Materials science #Metallurgy #Microstructure #Mineralogy #Optoelectronics #Rutile #Silicate #Zircon #Zirconium #cond-mat.mtrl-sci
paper · pdf · doi:10.1016/j.jcrysgro.2012.08.015
published as Journal of Crystal Growth; Volume 359, 15 November 2012, Pages 83-91
openalex publication_date 2012/08/20 · arxiv created 2013/03/12 · arxiv updated 2013/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abnormal grain growth (AGG) was observed in rutile TiO2 formed by the thermal treatment of anatase TiO2 in the presence of zirconium silicate. This morphological behaviour was seen to occur in sintered powder compacts and thin films with solid state zircon dopants and in TiO2 coatings on grains of zircon sand. In order to clarify the mechanism of AGG in this system, various doping methods were employed and the morphological consequences of these doping methods were investigated. It was found that doping by Zr and Si does not give rise to abnormal grain growth. The observed phenomena were discussed in terms of morphological and energetic considerations. It is likely that a distinct orientation relationship between rutile TiO2 and ZrSiO4 and possible grain boundary liquid formation play a role in giving rise to the rapid growth of faceted prismatic rutile.