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J. Korean Ceram. Soc. > Volume 33(1); 1996 > Article
Journal of the Korean Ceramic Society 1996;33(1): 1.
$Ba2(Ti_{8.472}Zr_{0.528})O_{20}$의 결정구조와 유전특성
백남석, 이헌식1, 조남웅2, 박성, 이병하
명지대학교 무기재료공학과
Microstructure and Dielectric Properties of $Ba2(Ti_{8.472}Zr_{0.528})O_{20}$
A single phase Ba2(Ti8,472Zr0.528)O20 was prepared by the oxalate method from aqueous solution of BaCl2 TiCl4 and ZrOCl2. The structure ananlysis has been carried out by Rietveld analysis method at room temperature. Powder X-ray data of Ba2(Ti8,472Zr0.528)O20 was indexed with the triclinic lattice(a=7.4587 $AA$ b=14.0672 $AA$, c=13.3327 $AA$, $alpha$=89.87, $beta$=79.45 ${gamma}$=84.46) The R (Residual) values of structure refinement were in a range between 10.00 and 8.00 This analysis proved that the added Zr occupied Ti sites in th structure of Ba2Ti9O20. Ba2(Ti8,472Zr0.528)O20 has excellent dielectric properties(dielectric constant K=40.49 at 5.42 GHz Q=4621) so that it can be used as good microwave dielectric materials.
Key words: $Ba_2Ti_9O_{20}$, $Ba2(Ti_{8.472}Zr_{0.528})O_{20}$ Rietveld analysis, Microwave dielectric materials
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