Rev.Adv.Mater.Sci. (RAMS)
No 1/2, Vol. 24, 2010, pages 44-47

PREPARATION OF CRYSTALLINE ZrTiO4 AT LOW THERMAL TREATMENT TEMPERATURES

V. dos Santos, M. Zeni, J.M. Hohemberger and C.P. Bergmann

Abstract

ZrTiO4 was obtained from zirconium n-propoxide and titanium isopropoxide, at the Zr:Ti molar ratio of 1:1, in propanol, through the sol-gel process at ambient temperature. ZrTiO4 powders were treated thermally at 500 úC, 600 úC, and 700 úC for 12 h. The powders obtained were characterized by thermal analysis, XRD, FTIR, and BET. A large loss of mass was observed between 40 and ca. 200 úC, which is probably due to dehydration, confirmed in the spectrum FTIR. The exothermal peak at ca. 700 úC, without loss of mass, was attributed to the crystallization of the orthorhombic phase of ZrTiO4 and confirmed by X-ray diffraction. The specific surface area of the ZrTiO4 powders diminished by thermal treatment from 242 ± 15 g.m-2 (at 500 úC) to 62 ± 6 g.m-2 (at 800úC).

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