Structural and microwave dielectric properties of La(Mg2/3Nb1/3)O3 ceramics

Jong Hoo Paik; Chang Hak Choi; Sahn Nahm; Jae Dong Byun; Hwack Joo Lee

doi:10.1023/A:1006660613457

Structural and microwave dielectric properties of La(Mg_2/3Nb_1/3)O₃ ceramics

Jong Hoo Paik, Chang Hak Choi, Sahn Nahm, Jae Dong Byun, Hwack Joo Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

The crystal structure and microwave dielectric properties of La(Mg_2/3Nb_1/3)O₃ (LMN) were studied using high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) with conventional and synchrotron sources. The XRD pattern showed that rhombohedral LMN was distorted by the anti-phase tilt of octahedral and anti-parallel shift of A-site cations. However, TEM analysis revealed that rhombohedral LMN has the in-phase tilt of octahedral as well as the anti-phase tilt of octahedral and anti-parallel shift of A-site cations. The relative density of the specimens sintered above 1350°C was above 96% of the theoretical density and the dielectric constant of the specimen was about 27. The temperature coefficient of resonance frequency ranged between -82 and -86 ppm/°C.

Original language	English
Pages (from-to)	889-894
Number of pages	6
Journal	Journal of Materials Science Letters
Volume	18
Issue number	11
DOIs	https://doi.org/10.1023/A:1006660613457
Publication status	Published - 1999

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Materials Science(all)

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title = "Structural and microwave dielectric properties of La(Mg2/3Nb1/3)O3 ceramics",

abstract = "The crystal structure and microwave dielectric properties of La(Mg2/3Nb1/3)O3 (LMN) were studied using high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) with conventional and synchrotron sources. The XRD pattern showed that rhombohedral LMN was distorted by the anti-phase tilt of octahedral and anti-parallel shift of A-site cations. However, TEM analysis revealed that rhombohedral LMN has the in-phase tilt of octahedral as well as the anti-phase tilt of octahedral and anti-parallel shift of A-site cations. The relative density of the specimens sintered above 1350°C was above 96% of the theoretical density and the dielectric constant of the specimen was about 27. The temperature coefficient of resonance frequency ranged between -82 and -86 ppm/°C.",

author = "Paik, {Jong Hoo} and Choi, {Chang Hak} and Sahn Nahm and Byun, {Jae Dong} and Lee, {Hwack Joo}",

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journal = "Journal of Materials Science Letters",

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T1 - Structural and microwave dielectric properties of La(Mg2/3Nb1/3)O3 ceramics

AU - Paik, Jong Hoo

AU - Choi, Chang Hak

AU - Nahm, Sahn

AU - Byun, Jae Dong

AU - Lee, Hwack Joo

PY - 1999

Y1 - 1999

N2 - The crystal structure and microwave dielectric properties of La(Mg2/3Nb1/3)O3 (LMN) were studied using high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) with conventional and synchrotron sources. The XRD pattern showed that rhombohedral LMN was distorted by the anti-phase tilt of octahedral and anti-parallel shift of A-site cations. However, TEM analysis revealed that rhombohedral LMN has the in-phase tilt of octahedral as well as the anti-phase tilt of octahedral and anti-parallel shift of A-site cations. The relative density of the specimens sintered above 1350°C was above 96% of the theoretical density and the dielectric constant of the specimen was about 27. The temperature coefficient of resonance frequency ranged between -82 and -86 ppm/°C.

AB - The crystal structure and microwave dielectric properties of La(Mg2/3Nb1/3)O3 (LMN) were studied using high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) with conventional and synchrotron sources. The XRD pattern showed that rhombohedral LMN was distorted by the anti-phase tilt of octahedral and anti-parallel shift of A-site cations. However, TEM analysis revealed that rhombohedral LMN has the in-phase tilt of octahedral as well as the anti-phase tilt of octahedral and anti-parallel shift of A-site cations. The relative density of the specimens sintered above 1350°C was above 96% of the theoretical density and the dielectric constant of the specimen was about 27. The temperature coefficient of resonance frequency ranged between -82 and -86 ppm/°C.

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JF - Journal of Materials Science Letters

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Structural and microwave dielectric properties of La(Mg_2/3Nb_1/3)O₃ ceramics

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