TY - JOUR
T1 - Novel sea-urchin-like rutile microstructures synthesized by the thermal decomposition and oxidation of K2TiF6
AU - Villavelázquez-Mendoza, C. I.
AU - Rodríguez-Mendoza, J. L.
AU - Hodgkins, R. P.
AU - Ibarra-Galván, V.
AU - Leal-Cruz, A. L.
AU - López-Valdivieso, A.
AU - Pech-Canul, M. I.
N1 - Funding Information:
This work was financially supported by CONACyT Ciencias Básicas 2010-155444 .
PY - 2014/4/15
Y1 - 2014/4/15
N2 - Sea-urchin-like rutile (su-TiO2) microstructures were successfully synthesized by thermal decomposition and oxidation of a solid precursor, K2TiF6. During the synthesis, precursor temperature (640 C), N2-flow (15 cm3/min) and inner pressure (90 mbar above the atmospheric pressure) remained constant. In order to evaluate the effect of time on the morphology of su-TiO2, five levels (0.5, 1, 1.5, 2, and 2.5 h) were considered. The thermal decomposition an oxidation of the K2TiF6 precursor was studied by thermal analyses. It was found that TiO2 was segregated from the matrix, leading to the formation of su-TiO2 during processing. At 640 C, the precursor underwent thermal decomposition and oxidation that produced three different products: K3TiOF5(s), TiO2(s), and F2(g). The su-TiO2 is synthesized only at t=2 h and t=2.5 h, presenting defined spikes at the former (100 μm×100 nm) and rougher structures at the latter (50 μm×10 μm).
AB - Sea-urchin-like rutile (su-TiO2) microstructures were successfully synthesized by thermal decomposition and oxidation of a solid precursor, K2TiF6. During the synthesis, precursor temperature (640 C), N2-flow (15 cm3/min) and inner pressure (90 mbar above the atmospheric pressure) remained constant. In order to evaluate the effect of time on the morphology of su-TiO2, five levels (0.5, 1, 1.5, 2, and 2.5 h) were considered. The thermal decomposition an oxidation of the K2TiF6 precursor was studied by thermal analyses. It was found that TiO2 was segregated from the matrix, leading to the formation of su-TiO2 during processing. At 640 C, the precursor underwent thermal decomposition and oxidation that produced three different products: K3TiOF5(s), TiO2(s), and F2(g). The su-TiO2 is synthesized only at t=2 h and t=2.5 h, presenting defined spikes at the former (100 μm×100 nm) and rougher structures at the latter (50 μm×10 μm).
KW - Ceramics
KW - Potassium hexafluorotitanate
KW - Rutile
KW - Sea-urchin-like microstructure
KW - Thermal analysis
KW - Thermal decomposition
UR - http://www.scopus.com/inward/record.url?scp=84894336167&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2014.01.165
DO - 10.1016/j.matlet.2014.01.165
M3 - Artículo
SN - 0167-577X
VL - 121
SP - 191
EP - 193
JO - Materials Letters
JF - Materials Letters
ER -