Effect of small amount of cobalt substitution on structure and microwave dielectric properties of barium magnesium niobate ceramics

Ching Tien Chen, Chi-Yuen Huang, Hong Jin Lin, Chun Te Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We investigated effects of substituting cobalt for magnesium on microstructures and microwave dielectric properties of BaMg 1/3Nb 2/3O 3 ceramics. Nucleation and growth of 1:2 ordered domains dominate microstructural variations for Ba(Mg 1-xCo x) 1/3Nb 2/3O 3 ceramics. Microstructures such as grains sizes and domain sizes significantly dominate variations of Q×f value. Less ordered domains are nucleated when substituting small amount of cobalt (x<0.1). Accordingly, domains and grains significantly grow with increased cobalt substitution. The 1:2 ordering degree is subsequently increased, and Q×f achieves a maximum value at x=0.05. Nevertheless, while cobalt substitution exceeds x=0.1, more ordered nuclei occur and consequently affect the domain growth and the grain growth. The Q×f value remarkably decreases at x=0.1, and varies due to different ordering degrees and compositions. The Q×f value of specimens at x=0.05 becomes as high as 43,000, and is similar to that of specimens at x=0.5.

Original languageEnglish
Pages (from-to)2373-2380
Number of pages8
JournalJournal of the European Ceramic Society
Volume32
Issue number10
DOIs
Publication statusPublished - 2012 Aug 1

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Barium
Cobalt
Dielectric properties
Magnesium
Substitution reactions
Microwaves
Microstructure
Grain growth
Nucleation
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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abstract = "We investigated effects of substituting cobalt for magnesium on microstructures and microwave dielectric properties of BaMg 1/3Nb 2/3O 3 ceramics. Nucleation and growth of 1:2 ordered domains dominate microstructural variations for Ba(Mg 1-xCo x) 1/3Nb 2/3O 3 ceramics. Microstructures such as grains sizes and domain sizes significantly dominate variations of Q×f value. Less ordered domains are nucleated when substituting small amount of cobalt (x<0.1). Accordingly, domains and grains significantly grow with increased cobalt substitution. The 1:2 ordering degree is subsequently increased, and Q×f achieves a maximum value at x=0.05. Nevertheless, while cobalt substitution exceeds x=0.1, more ordered nuclei occur and consequently affect the domain growth and the grain growth. The Q×f value remarkably decreases at x=0.1, and varies due to different ordering degrees and compositions. The Q×f value of specimens at x=0.05 becomes as high as 43,000, and is similar to that of specimens at x=0.5.",
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Effect of small amount of cobalt substitution on structure and microwave dielectric properties of barium magnesium niobate ceramics. / Chen, Ching Tien; Huang, Chi-Yuen; Lin, Hong Jin; Lee, Chun Te.

In: Journal of the European Ceramic Society, Vol. 32, No. 10, 01.08.2012, p. 2373-2380.

Research output: Contribution to journalArticle

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