Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Patent
1998-11-06
2000-06-20
Group, Karl
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
501136, 501137, C04B 35457
Patent
active
060778024
ABSTRACT:
A microwave dielectric ceramic composition is fabricated by adding one selected from a material containing Ba and a material containing Sr or a mixture of a material containing Ba and a material containing Sr to a composition formed of 25.about.43 wt % of TiO.sub.2, 39-57 wt % of ZrO.sub.2, and 7-28 wt % of SnO.sub.2 as an additive, wherein the additive is added by 0.2.about.8.0 wt % based on the total amount of the composition, and is capable of implementing a high dielectric constant and quality factor by sintering at a temperature of 1250.about.1400.degree. C.
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Gisbert Wolfram et al., "Existence Range, Structural and Dielectric Properties of Zr.sub.x Ti.sub.y Sn.sub.z O.sub.4 Ceramics (x+y+z=2 )", Mat. Res. Bull., vol. 16, Sep. 1981 Pergamon Press Ltd., pp. 1455-1463.
K. Wakino et al., "Microwave Characteristics of (Zr, Sn)TiO.sub.4 and BaO-PbO-Nd.sub.2 O.sub.3 -TIO.sub.2 Dielectric Resonators", Journal of the American Ceramic Society, vol. 67, No. 4 pp. 278-281 (Jul. 1983).
Shin-ichi Hirano et al., "Chemical Processing and Microwave Characteristics of (Zr, Sn) TiO.sub.4 Microwave Dielectrics", Journal of the American Ceramic Society, vol. 74, No. 6, pp. 1320-1324 (Aug. 1984).
Choy Tae Goo
Hahn Jin Woo
Han Gee Pyeong
Kim Duk Jun
Kim Yark Yeon
Electronics and Telecommunications Research Institute
Group Karl
Korea & Telecom
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