Artigo
Effect of calcium on the structural properties of Ba(1-x)Ca (x) TiO3 particles synthesized by complex polymerization method
Registro en:
Journal Of Materials Science. New York: Springer, v. 49, n. 7, p. 2875-2878, 2014.
0022-2461
10.1007/s10853-013-7993-2
WOS:000330791400021
Autor
Araujo, V. D.
Motta, F. V.
Marques, A. P. A.
Paskocimas, C. A.
Bomio, M. R. D.
Longo, E. [UNESP]
Varela, J. A. [UNESP]
Resumen
Ferroelectric materials, such as barium titanate (BaTiO3), have been extensively studied for application in electronic and optical devices. The substitution of Ba by Ca is an effective method to improve the piezoelectricity temperature stability, as it can greatly lower the tetragonal-orthorhombic phase transition temperature, whereas the change of the Curie point is negligible. Ba(1-x)Ca (x) TiO3 (x = 0, 0.05, 0.10, 0.15, and 0.20) powders were prepared by complex polymerization method. The effect of calcium on the tetragonality of the BaTiO3 system was monitored using basic characterization techniques: X-ray diffraction, differential scanning calorimetry, and Raman spectroscopy. The results indicate that increased calcium contents raise the Curie temperature (T (c)) and that the addition of calcium in the BT matrix reduces tetragonality. Rede de Catalisadores Ambientais (RECAM) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Univ Fed Rio Grande do Norte, CT, DEMAT, BR-59072970 Natal, RN, Brazil UNIFESP, BR-09972270 Diadema, SP, Brazil UNESP, IQ, LIEC, BR-14801907 Araraquara, SP, Brazil UNESP, IQ, LIEC, BR-14801907 Araraquara, SP, Brazil FAPESP: 98/14324-8