Preparação de LiNbO3 e LiNbO3:Eu3+ pelo método dos precursores poliméricos
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Undergraduate course
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Sociedade Brasileira de Química
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Article
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Acesso aberto
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Abstract
The ferroelectric compound LiNbO3 was prepared by the polymeric precursors method in the polycrystalline form containing different concentrations of Eu3+. The compounds were characterized by X-ray diffraction, vibrational and electronic spectroscopy. Electronic spectroscopy was shown to be sensitive to small concentrations of contaminating phases allowing a good control of the compound purity. The presence of Eu3+ ions leads to the formation of the LiNb3O8 phase in the range of 500 to 800 °C. Above this temperature range LiNbO3 and tetragonal (T') EuNbO4 were obtained.
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Portuguese
Citation
Química Nova. Sociedade Brasileira de Química, v. 25, n. 6b, p. 1067-1073, 2002.
