Microstructure and electric properties of strontium niobate ceramics

Fu, Chunlin; Liu, Huijiang; Chen, Gang; Cai, Wei; Deng, Xiaoling

doi:10.1016/j.ceramint.2011.10.063

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…Grains 435 μm are seen in SNO ceramics in Fig. 4 [23]. Pores decreased and grain size increased for 6 h sintering SNO and SNT ceramics as illustrated in Fig.…”

Section: Resultsmentioning

confidence: 76%

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Effects of Ti addition on properties of Sr2Nb2O7 thermoelectric ceramics

Liou

Tsai

et al. 2015

Ceramics International

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“…Grains 435 μm are seen in SNO ceramics in Fig. 4 [23]. Pores decreased and grain size increased for 6 h sintering SNO and SNT ceramics as illustrated in Fig.…”

Section: Resultsmentioning

confidence: 76%

“…1 [23]. The reaction-sintering process is proven a simple and effective process to obtain Sr 2 Nb 2 O 7 -based ceramics.…”

Section: Resultsmentioning

confidence: 99%

Effects of Ti addition on properties of Sr2Nb2O7 thermoelectric ceramics

Liou

Tsai

et al. 2015

Ceramics International

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“…Members of the perovskite-like layered structure family can operate above 900 • C; such members include Sr 2 Nb 2 O 7 (strontium niobate, SNO), La 2 Ti 2 O 7 , Nd 2 Ti 2 O 7 and Pr 2 Ti 2 O 7 [2][3][4][5][6][7]. Especially, the Curie temperature of Sr 2 Nb 2 O 7 is 1327 • C [8]. It can be utilized in high-temperature circumstances, but the electrical properties of SNO ceramics are poor.…”

Section: Introductionmentioning

confidence: 98%

Effect of Ta Doping on the Microstructure, Dielectric and Ferroelectric Properties of Sr₂Nb₂O₇Ceramics

Xiang

Chen

et al. 2014

Ferroelectrics

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Sr 2 (Ta x Nb 1-x ) 2 O 7 (x = 0.0, 0.1, 0.2, 0.4) (STNO) ceramics were prepared by the conventional solid-state reaction method. The microstructure, dielectric and ferroelectric properties of the samples were investigated. The results show single phase STNO with perovskite-like layered structure and that Ta 5+ ion can diffuses into the crystal lattice. The addition of Ta 5+ dopant decreases the grain size of the material. The dielectric constant increases with increased x, and the sample with x = 0.2 exhibits enhanced dielectric properties (ε r ≈ 56, tanδ ≈ 0.01%). The remnant polarization (2P r ) and coercive electric field (2E C ) of STNO ceramics increase with increasing Ta content, and reach the maximum value (2P r = 0.11μC/cm 2 and 2E C = 5.75 kV/cm) at x = 0.4. Our results indicate that Ta doping can effectively improve the dielectric and ferroelectric properties of Sr 2 Nb 2 O 7 ceramics.

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“…Pan for their use as a potential advanced thermal barrier coating (TBC) materials [7] . Recently, niobate with different crystal structures also have attracted much recent attention [8,9].…”

Section: Introductionmentioning

confidence: 99%

Electronic structure, anisotropic elastic and thermal properties of monoclinic Ca2Nb2O7

Yang¹,

Zhao²,

Shahid³

et al. 2016

Ceramics International

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The electronic structure, anisotropic elastic and thermal properties of monoclinic Ca 2 Nb 2 O 7 have been investigated by density functional theory (DFT) calculations and further are verified by experimental results. It has been shown that the monoclinic Ca 2 Nb 2 O 7 is a direct band gap insulator with the calculated band gap of 3.07 eV which is comparable with the experimental value of 3.33 eV. The bottom of the conduction band (CB) is dominated by the 4d orbitals of the Nb atoms and the 2p orbitals of O atoms, while the top of valence band (VB) mainly consists of the 2p orbitals of O atoms. Calculated sound velocities of different directions show that the faster mixed mode (v +) is much larger than that of slower mixed mode (v-) and pure transverse mode (v t) in both [100] and [001] directions. The pure longitudinal mode v l has the greatest sound velocity among the three acoustic modes in the [010] direction. According to Clarke's model, monoclinic Ca 2 Nb 2 O 7 has low limit thermal conductivity with 1.43 W•m-1 •K-1 at high temperature, and minimum thermal conductivity in (100),(110),(010) and (001) planes sensitively depends on the directions.

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Microstructure and electric properties of strontium niobate ceramics

Cited by 7 publications

References 6 publications

Effects of Ti addition on properties of Sr2Nb2O7 thermoelectric ceramics

Effects of Ti addition on properties of Sr2Nb2O7 thermoelectric ceramics

Effect of Ta Doping on the Microstructure, Dielectric and Ferroelectric Properties of Sr₂Nb₂O₇Ceramics

Electronic structure, anisotropic elastic and thermal properties of monoclinic Ca2Nb2O7

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Microstructure and electric properties of strontium niobate ceramics

Cited by 7 publications

References 6 publications

Effects of Ti addition on properties of Sr2Nb2O7 thermoelectric ceramics

Effects of Ti addition on properties of Sr2Nb2O7 thermoelectric ceramics

Effect of Ta Doping on the Microstructure, Dielectric and Ferroelectric Properties of Sr2Nb2O7Ceramics

Electronic structure, anisotropic elastic and thermal properties of monoclinic Ca2Nb2O7

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Effect of Ta Doping on the Microstructure, Dielectric and Ferroelectric Properties of Sr₂Nb₂O₇Ceramics