Characterization of CaTiO3-NdAlO3 dielectric ceramics

Jančar, Boštjan; Suvorov, Danilo; Valant, Matjaž; Dražić, Goran

doi:10.1016/s0955-2219(02)00359-x

Cited by 149 publications

(60 citation statements)

References 31 publications

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“…apart from the academic point of view due to physical properties they exhibits. Perovskite materials with high dielectric constants have been used for technological applications such as wireless communication system, cellular phones and global positioning systems in the form of capacitors, resonators, and filters [1][2][3][4][5] . Since, most of the devices are operated in the ac electrical mode, the investigation of ac electrical conduction of these materials is interesting.…”

Section: Introductionmentioning

confidence: 99%

Dielectric relaxation in combustion synthesized perovskite SmAlO3

Saji¹,

Jeyasingh²,

Vinodkumar³

et al. 2017

jusps-B

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SmAlO3 perovskite material was prepared by solution combustion technique. The ac conductivity and dielectric properties of the sintered pellet of the sample have been investigated in the frequency range 1Hz to 1MHz and temperature range 303K-783K. The experimental results indicate that the ac conductivity (ω), dielectric constant ( ) and loss tangent ( ) depends on depends on the temperature and frequency. The ac conductivity was found to obey the power law ω n with and the behavior of exponent n with temperature suggested that the conduction mechanism in the ceramic follows OLPT model. The obtained results are compared to the principal theories that describe the universal dielectric response behavior. The value and tan  were found to be temperature and frequency dependent.

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Section: Introductionmentioning

confidence: 99%

Dielectric relaxation in combustion synthesized perovskite SmAlO3

Saji¹,

Jeyasingh²,

Vinodkumar³

et al. 2017

jusps-B

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“…They reported that CaTiO 3 had a high permittivity, ε r =170, and a temperate dielectric losses, Q×f =3500 GHz, which provides a valuable reference for microwave components [9]. Then many studies about the advance of the microwave dielectric properties of CaTiO 3 -based ceramics have been conducted for the last 20 years [10][11][12][13]. Moreover, the substitution of Ca 2+ by other trivalent lanthanide ions, such as La 3+ , Sm 3+ and Nd 3+ , has also been investigated by several research groups.…”

Section: Introductionmentioning

confidence: 99%

Effects of La₂O₃-B₂O₃-ZnO additions on the low temperature sintering and microwave dielectric properties of (Ca_0.61La_0.26) TiO₃ceramics

Chen

Niu

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…According to many investigations [5][6][7][8][9][10], the 0.7CaTiO 3 -0.3NdAlO 3 ceramics system shows quite good microwave dielectric properties (e r = 45, Q 9 f [ 40,000 GHz, s f * 0 ppm/°C). However, the price of Nd 2 O 3 is expensive enough, which greatly limits the application of 0.7CaTiO 3 -0.3NdAlO 3 microwave dielectric ceramics.…”

Section: Introductionmentioning

confidence: 99%

Microwave dielectric properties of 0.7(SryCa1−y)TiO3–0.3(SmxNd1−x)AlO3 ceramics with near-zero temperature coefficient

Jiang

Xie

Cao

et al. 2016

J Mater Sci: Mater Electron

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The microstructures and the microwave dielectric properties of 0.7(Sr y Ca 1-y )TiO 3 -0.3(Sm x Nd 1-x ) AlO 3 (7SCT-3SNA) ceramics system prepared by conventional solid-state route were investigated. X-ray powder diffraction results showed solid solutions with the perovskite structure were completely formed within the entire observation x range, and the unit cell volume of 0.7CaTiO 3 -0.3(Sm x Nd 1-x )AlO 3 (7CT-3SNA) ceramics decreased with increasing x value. The substitution of Nd 3? by Sm 3? could enhance the densification of 7CT-3SNA ceramics, and consequently improve the dielectric properties of the ceramics. When x = 0.75, specimens exhibited excellent microwave dielectric properties with e r * 44.52, Q 9 f value *40,110 and s f value *-1 ppm/°C . For further improving the microwave dielectric properties of the samples, Ca 2? in 0.7CaTiO 3 -0.3(Sm x Nd 1-x ) AlO 3 were partially substituted by Sr 2? . The results showed that the replacement of Ca 2? by Sr 2? effectively enhanced the densification of specimens. By optimizing the composition, the ceramics with y = 0.01 in 0.7(Sr y Ca 1-y ) TiO 3 -0.3(Sm 0.75 Nd 0.25 )AlO 3 (7SCT-3SNA) showed high relative density and dense and uniform microstructures as well as well-developed grain growth with superior microwave dielectric properties: e r * 45.38, Q 9 f value *41,730 and s f value *-0.2 ppm/°C.

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Characterization of CaTiO3-NdAlO3 dielectric ceramics

Cited by 149 publications

References 31 publications

Dielectric relaxation in combustion synthesized perovskite SmAlO3

Dielectric relaxation in combustion synthesized perovskite SmAlO3

Effects of La₂O₃-B₂O₃-ZnO additions on the low temperature sintering and microwave dielectric properties of (Ca_0.61La_0.26) TiO₃ceramics

Microwave dielectric properties of 0.7(SryCa1−y)TiO3–0.3(SmxNd1−x)AlO3 ceramics with near-zero temperature coefficient

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Characterization of CaTiO3-NdAlO3 dielectric ceramics

Cited by 149 publications

References 31 publications

Dielectric relaxation in combustion synthesized perovskite SmAlO3

Dielectric relaxation in combustion synthesized perovskite SmAlO3

Effects of La2O3-B2O3-ZnO additions on the low temperature sintering and microwave dielectric properties of (Ca0.61La0.26) TiO3ceramics

Microwave dielectric properties of 0.7(SryCa1−y)TiO3–0.3(SmxNd1−x)AlO3 ceramics with near-zero temperature coefficient

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Effects of La₂O₃-B₂O₃-ZnO additions on the low temperature sintering and microwave dielectric properties of (Ca_0.61La_0.26) TiO₃ceramics