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Ultrasound role in sol-gel processing of PbTiO3 ceramics

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: I. Chilibon, J. Marat-Mendes, R. Igreja, C.J. Dias

Editorial: ISSN: 1454-4164, Journal of Optoelectronics and Advanced Materials, 7, no. 5, p.2727-2735, 2005.

Rezumat:

Lead titanate (PbTiO3) powders in tetragonal form have been successfully prepared by sol-gel method. The processing of lead titanate ceramics was followed up using techniques such as: X-ray diffraction (XRD), thermal analysis (DSC) and microscopy (SEM). Three lead titanate powders have been obtained in different conditions function of annealing temperature and ultrasound field. The sol-gel process may be improved by ultrasound gel irradiation in an optimum irradiation time, and implies the structure homogeneity of PT powders. The ceramic powder, which had ultrasound irradiated gel, exhibited higher Curie temperature than ceramic powders obtained in the typical sol-gel process.

Cuvinte cheie: sol-gel, titanat de plumb, PbTiO3, PT, ultrasunete // sol-gel, lead titanate, PbTiO3, PT, ultrasound