Crystal Structure and Microwave dielectric Properties of Ba(Zn1/3Ta2/3)O3–(Sr,Ba)(Ga1/2Ta1/2)O3 Ceramics
- 1 July 1992
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 75 (7) , 1767-1771
- https://doi.org/10.1111/j.1151-2916.1992.tb07195.x
Abstract
The microwave dielectric properties and crystal structure of Ba(Zn1/3Ta2/3)O3– (Sr,Ba)(Ga1/2Ta1/2)O3 ceramics were investigated in the present study. The Q value of Ba(Zn1/3Ta2/3)O3 was improved by adding 5 mol% Sr(Ga1/2Ta1/2)O3. The maximum Q value of Q×f= 162000 GHz was obtained at 0.95Ba(Zn1/3Ta2/3)O3. 0.05Sr(Ga1/2Ta1/2)O3. For this composition, a lattice super structure caused by hexagonal ordering was observed. A further improvement in the Q value was attained when some Sr was replaced with Ba, and 0.95Ba(Zn1/3Ta2/3)O3· 0.05(Sr0.25Ba0.75)(Ga1/2Ta1/2)O3 exhibited a maximum Q value such that Q×f= 210000 GHz. Despite the increased Q value with the replacement of Sr by Ba, the c/a value, which indicates the degree of lattice distortion, remained constant near image 3/2. The Q value thus improved without lattice distortion in the system Ba(Zn1/3Ta2/3)O3‐(Sr,Ba)(Ga1/2Ta1/2)O3, whereas the improvement of Q value increased with lattice distortion in the solid solution system with Ba(Zn1/3Ta2/3)O3 as an end member.Keywords
This publication has 15 references indexed in Scilit:
- Microstructures and Microwave Dielectric Properties of (Ba,Sr)(Ga1/2Ta1/2)O3.Journal of the Japan Society of Powder and Powder Metallurgy, 1991
- Formation and Microwave Dielectric Properties of Complex Perovskite Ca(Ga1/2Ta1/2)O3Journal of the Ceramic Society of Japan, 1990
- Microwave Characteristics of A(B3+1/2B5+1/2)O3 Ceramics (A = Ba, Ca, Sr; B3+= La, Nd, Sm, Yb; B5+= Nb, Ta)Journal of the American Ceramic Society, 1989
- Microwave Loss Quality of BaZn13Ta2/3O3 CeramicsJournal of the American Ceramic Society, 1985
- Improved High‐Q Dielectric Resonator with Complex Perovskite StructureJournal of the American Ceramic Society, 1984
- Effect of Mn Doping on the Dielectric Properties of Ba2Ti9O20 Ceramics at Microwave FrequencyJapanese Journal of Applied Physics, 1983
- A powder neutron and X-ray diffraction determination of the structure of Ba3Ta2ZnO9: an investigation of perovskite phases in the system Ba–Ta–Zn–O and the preparation of Ba2TaCdO5.5and Ba2CeInO5.5Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1976
- Microwave Absorption in Cubic Strontium TitanatePhysical Review B, 1962
- A Dielectric Resonator Method of Measuring Inductive Capacities in the Millimeter RangeIEEE Transactions on Microwave Theory and Techniques, 1960
- Substitution in the Octahedrally Coördinated Cation Positions in Compounds of the Perovskite Type1,2Journal of the American Chemical Society, 1959