TY - JOUR
T1 - Effect of small amount of cobalt substitution on structure and microwave dielectric properties of barium magnesium niobate ceramics
AU - Chen, Ching Tien
AU - Huang, Chi Yuen
AU - Lin, Hong Jin
AU - Lee, Chun Te
N1 - Funding Information:
This work was supported by the National Science Council of Taiwan under grant No. NSC 98-2221-E-006-078-MY2 .
PY - 2012/8
Y1 - 2012/8
N2 - 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.
AB - 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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U2 - 10.1016/j.jeurceramsoc.2012.03.025
DO - 10.1016/j.jeurceramsoc.2012.03.025
M3 - Article
AN - SCOPUS:84860557584
SN - 0955-2219
VL - 32
SP - 2373
EP - 2380
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 10
ER -