Impedance and Mossbauer spectroscopy study of BiCu3Ti3FeO12 dielectric matrix

被引：2

作者：

Freitas, D. B. ^{[1
,2
]}

Bezerra Junior, M. H. ^{[1
,2
,5
]}

Oliveira, R. G. M. ^{[2
]}

de Morais, J. E. V. ^{[2
]}

Bessa, V. L. ^{[1
,2
]}

Carmo, F. F. ^{[2
,6
]}

Pereira, M. S. ^{[3
]}

Vasconcelos, I. F. ^{[3
]}

Silva, M. A. S. ^{[2
]}

de Andrade, H. D. ^{[4
]}

Queiroz Junior, I. S. ^{[4
]}

Silva, R. S. ^{[7
]}

Sombra, A. S. B. ^{[2
,4
]}

机构：

[1] Fed Univ Ceara UFC, Telecommun Engn Dept, POB 6007, BR-60755640 Fortaleza, CE, Brazil

[2] Fed Univ Ceara UFC, Dept Phys, Telecommun & Mat Sci & Engn Lab LOCEM, Campus PICI,POB 6030, Fortaleza, CE, Brazil

[3] Univ Fed Ceara, Dept Met & Mat Engn, Fortaleza, CE, Brazil

[4] Univ Fed Rural Semi Arido, Fed Univ Semiarid Reg, BR-59625900 Mossoro, RN, Brazil

[5] Fed Inst Ceara, Campus Fortaleza IFCE, BR-63400000 Fortaleza, CE, Brazil

[6] Fed Univ Ceara UFC, Dept Organ & Inorgan Chem, Fortaleza, CE, Brazil

[7] Univ Fed Sergipe, Dept Phys, Grp Funct Nanomat, BR-49100000 Sao Cristovao, SE, Brazil

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2021年 / 32卷 / 09期

关键词：

CACU3TI4O12; ACU(3)TI(4)O(12); CONSTANT;

D O I：

10.1007/s10854-021-05768-y

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In the present work, an electroceramic of the perovskite family, BiCu3Ti3FeO12 (BCTFO), was synthesized by the solid-state reaction method. The structural study was performed by X-ray diffraction and Mossbauer and Raman spectroscopy. Electric and dielectric properties were analyzed by impedance spectroscopy and the Hakki-Coleman method. Due to the BCTFO is isostructural of the CaCu3Ti4O12 (CCTO), the BCTFO presents as a promissory electroceramic. Mossbauer spectroscopy reveals paramagnetic spectra to BCTFO, with two octahedral sites for iron ions. Regarding dielectric properties, for 1 Hz, BCTFO presents a high relative dielectric permittivity (epsilon(r) approximate to 1 x 10(4)) and dielectric loss (tan delta > 1) and epsilon(r) = 230.88, tan delta approximate to 1 x 10(-2) in the microwave range. The produced ceramic exhibited a high resonance frequency temperature coefficient (tau(f)) with a value of + 2852 ppm degrees C-1, making it a candidate for fabrication of the thermostable electroceramic composites with other ceramic matrices with negative tau(f) values improving the thermal stability.

引用

页码：11607 / 11615

页数：9

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