DocumentCode
3164997
Title
Effect of perovskite impurity addition on microwave dielectric properties of Ba(Mg1/3Ta2/3)O3-Ba(Ni 1/3Ta2/3)O3 ceramics
Author
Kim, Shin-Young ; Lee, Hee Young ; Yang, Cheul-Kee ; Kim, Jeong-Joo ; Kim, Tae Hong ; Choy, Tae Goo
Author_Institution
Dept. of Mater. Sci. & Eng., Yeungnam Univ., Kyongsan, South Korea
fYear
1991
fDate
33457
Firstpage
617
Lastpage
621
Abstract
Microwave dielectric properties in the system Ba(Mg1-x/3Nix/3Ta2/3)O3 -yBaZrO3 or Ba(Mg1-x/3Nix/3Ta2/3)O3 -zBaSnO3 were investigated with an emphasis on the sintering behavior, phase relations and microstructure-property relationships. The increase of Q value of 13000 at 6 GHz while achieving zero τf occurred when y=0.05. The addition of excess MgO had a detrimental effect on Q value improvement, which is attributable to the segregation of excess MgO along grain boundaries. The appearance of Ba1/2TaO3 second phase would have negative effect on the improvement of and value. Therefore, the fabrication of ceramics without any second phase should be crucial in obtaining improved microwave performance
Keywords
Q-factor; X-ray diffraction; barium compounds; ceramics; crystal structure; ferroelectric materials; grain boundary segregation; permittivity; sintering; transmission electron microscopy; 6 GHz; Ba(Mg13/Ta23/)O3-Ba(Ni13/Ta 23/)O3 ceramics; Ba(MgO3)(TaO3)-Ba(NiO3)(TaO3); BaMgO3NiO3TaO3-BaSnO3; BaMgO3NiO3TaO3-BaZrO3; Q value; ceramics fabrication; grain boundaries; improved microwave performance; microstructure; microwave dielectric properties; perovskite impurity addition; phase relations; segregation; Ceramics; Dielectric measurements; Electromagnetic heating; Electrons; Grain boundaries; Impurities; Powders; Resonance; Resonant frequency; X-ray scattering;
fLanguage
English
Publisher
ieee
Conference_Titel
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location
University Park, PA
Print_ISBN
0-7803-1847-1
Type
conf
DOI
10.1109/ISAF.1994.522446
Filename
522446
Link To Document