Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Patent
1999-03-09
2000-10-24
Group, Karl
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
C04B 35497
Patent
active
061367397
ABSTRACT:
There is disclosed a high dielectric ceramic composition for capacitors, which comprises (1-x)Pb(Fe.sub.1/2 Ta.sub.1/2)O.sub.3 xPb(Fe.sub.1/2 Nb.sub.1/2)O.sub.3 wherein 0.35.ltoreq.x.ltoreq.0.65, and 0.01-0.5 % by weight of manganese, chromium or cobalt. The composition can be sintered at a temperature of 1,000.degree. C. with a high dielectric constant and a low dielectric loss coefficient.
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Shrout and Halliyal, "Preparation of Lead-Based Ferroelectric Relaxors for Capacitors," Am. Ceram. Soc. Bull. 66(4) 704-11 (1987).
Lanagan etl al., "Delectric Behavior of the Relaxor Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 -PbTiO.sub.3 Solid-Solution System in the Microwave Region," J. Am. Ceram. Soc. 72(3) 481-3 (1989).
Kim Ho Ki
Knowles Kevin
Park Yung
Group Karl
Korea Advanced Institute of Science & Technology
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