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

The crystal structure of lanthanum magnesium niobate was studied using HRTEM and XRD with conventional and synchrotron sources. The relative density of specimens sintered above 1350 C was above 96% of the theoretical density and the dielectric constant was about 27. The highest Q x f value of about...

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Bibliographic Details
Published in:Journal of materials science letters 1999, Vol.18 (11), p.889-894
Main Authors: JONG HOO PAIK, CHOI, C.-H, NAHM, S, BYUN, J.-D, HWACK JOO LEE
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Dielectric properties of solids and liquids
Dielectric, piezoelectric, ferroelectric and antiferroelectric materials
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Halides, chalcogenides and analogous compounds of group vb
Inorganic compounds
Niobates, titanates, tantalates, pzt ceramics, etc
Permittivity (dielectric function)
Physics
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
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Summary:The crystal structure of lanthanum magnesium niobate was studied using HRTEM and XRD with conventional and synchrotron sources. The relative density of specimens sintered above 1350 C was above 96% of the theoretical density and the dielectric constant was about 27. The highest Q x f value of about 33000 was achieved for a specimen sintered at 1500 C for 4 h. The temperature coefficient of resonant frequency ranged between -82 and -86 ppm/C. 10 refs.
ISSN:0261-8028
DOI:10.1023/A:1006660613457