Dielectric composition, method of manufacturing a ceramic...

Details Dielectric composition, method of manufacturing a ceramic... Dielectric composition, method of manufacturing a ceramic...

2006-05-09

2006-05-09

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

C501S138000, C428S697000, C428S702000, C264S614000, C264S615000, C264S676000, C361S321400

Reexamination Certificate

active

07041615

ABSTRACT:
The dielectric composition contains a mixture of a ceramic composition containing BaaREbTicO3, wherein RE represents a rare earth element, with 0.05≦a≦0.25, 0.525≦b≦0.70, 0.85≦c≦1.0, and 2a+3b+4c=6, and free from lead and bismuth, a glass composition, and a metal oxide. The glass composition preferably contains ZnO or MgO, SiO2, and at least 10% by weight of Li2O or TiO2. Preferably, the alkaline earth metal oxide is MgO. By preference, the glass composition essentially consists of 50–80% weight of SiO2, 5–25% weight of MgO, and optionally another alkaline earth metal oxide, and 10–25% by weight of Li2O, and is substantially free from boron. The dielectric composition can be sintered in the presence of Cu electrodes at a temperature below the melting point of Cu so as to manufacture an electronic device such as a ceramic multilayer element. After sintering, the dielectric composition has a relative dielectric constant of at least 55.

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