TY - GEN
T1 - Sonochemical synthesis of nanostructured anatase and kinetics of phase transformation and coarsening at different heat treatment conditions
AU - González-Reyes, Leonardo
AU - Hernández-Pérez, I.
AU - Rosales, Héctor Dorantes
AU - Arce-Estrada, Elsa M.
AU - Hernández, Francisco C.Robles
PY - 2008
Y1 - 2008
N2 - The present paper shows that nanostructured anatase can be produced by sonochemical synthesis with an average size of 6.4nm and a surface area of 300m2g-1. The results of microstructure coarsening evolution and phase transformation of anatase to rutile subjected to different heat treatment conditions are presented. The rates of transformation from anatase to rutile, critical particle size of transformation anatase to rutile and coarsening are directly related to heat treatment temperature. This in rums allows developing a mathematical model to predict particle size evolution. The developed model can be used to precisely predict particle size for anatase and/or rutile using exponential like equations similar to those described in the LSW theory. The exponent of the LSW-like equations went from ∼1/7 to ∼1/4 as heat treatment time increase from 8 and 72 h. This research was supported by means of BET, XRD and TEM.
AB - The present paper shows that nanostructured anatase can be produced by sonochemical synthesis with an average size of 6.4nm and a surface area of 300m2g-1. The results of microstructure coarsening evolution and phase transformation of anatase to rutile subjected to different heat treatment conditions are presented. The rates of transformation from anatase to rutile, critical particle size of transformation anatase to rutile and coarsening are directly related to heat treatment temperature. This in rums allows developing a mathematical model to predict particle size evolution. The developed model can be used to precisely predict particle size for anatase and/or rutile using exponential like equations similar to those described in the LSW theory. The exponent of the LSW-like equations went from ∼1/7 to ∼1/4 as heat treatment time increase from 8 and 72 h. This research was supported by means of BET, XRD and TEM.
KW - Electron microscopy
KW - Functional applications
KW - Grain size
KW - Sonochemical treatment
KW - TiO
UR - http://www.scopus.com/inward/record.url?scp=53849087876&partnerID=8YFLogxK
M3 - Contribución a la conferencia
AN - SCOPUS:53849087876
SN - 9780873397162
T3 - TMS Annual Meeting
SP - 129
EP - 136
BT - TMS2008 - 137th Annual Meeting and Exhibition Supplemental Proceedings
T2 - TMS 2008 Annual Meeting Supplemental: Materials Processing and Properties
Y2 - 9 March 2008 through 13 March 2008
ER -