Crystal structure and microwave dielectric properties of La(Mg1/2Ti1/2)O3 ceramics

Dong Yoon Lee, Seok Jin Yoon, Jae Hyun Yeo, Sahn Nahm, Jong Hoo Paik, Keum Chan Whang, Byung Guk Ahn

Research output: Contribution to journalArticle

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Abstract

The temperature stability and the Q-value of microwave ceramics are largely affected by the crystal structure. La(Mg1/2Ti1/2)O3 (LMT) has the 1:1 ordered monoclinic crystal structure with the lattice parameters of a = 5.5467 angstroms, b = 5.5616 angstroms, c = 7.8426 angstroms and β = 89.9589°. The spacegroup of the ceramic material is P21/n. Monoclinic LMT is distorted by in-phase and anti-phase tilting of octahedra with the a-a-c+ tilting system. An anti-parallel shift of A-site cations is also found in LMT. The relative density of the specimens sintered above 1600 °C ranged between 95% and 96% of the theoretical density and the dielectric constant of the specimens is about 28.

Original languageEnglish
Pages (from-to)131-134
Number of pages4
JournalJournal of Materials Science Letters
Volume19
Issue number2
DOIs
Publication statusPublished - 2000 Jan 1

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Dielectric properties
Crystal structure
Microwaves
Ceramic materials
Lattice constants
Cations
Permittivity
Positive ions
Temperature

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Crystal structure and microwave dielectric properties of La(Mg1/2Ti1/2)O3 ceramics. / Lee, Dong Yoon; Yoon, Seok Jin; Yeo, Jae Hyun; Nahm, Sahn; Paik, Jong Hoo; Whang, Keum Chan; Ahn, Byung Guk.

In: Journal of Materials Science Letters, Vol. 19, No. 2, 01.01.2000, p. 131-134.

Research output: Contribution to journalArticle

Lee, Dong Yoon ; Yoon, Seok Jin ; Yeo, Jae Hyun ; Nahm, Sahn ; Paik, Jong Hoo ; Whang, Keum Chan ; Ahn, Byung Guk. / Crystal structure and microwave dielectric properties of La(Mg1/2Ti1/2)O3 ceramics. In: Journal of Materials Science Letters. 2000 ; Vol. 19, No. 2. pp. 131-134.
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