Piezoelectric ceramic

Details Piezoelectric ceramic Piezoelectric ceramic

1996-11-07

1999-11-30

Koslow, C. Melissa

Compositions

Piezoelectric

Lead, zirconium, titanium or compound thereof containing

501134, H01L 4118

Patent

active

059936835

ABSTRACT:
The present invention provides a piezoelectric ceramic having a low mechanical quality coefficient Qm and excellent heat resistance, for example, a piezoelectric ceramic for a filter element which can be applied to surface mounting. The piezoelectric ceramic contains at least a composite oxide of lead, zirconium and titanium, and oxides of manganese, silicon and boron, the concentration of the manganese oxide present in the crystal gain boundary being higher than that in crystal grains of the piezoelectric ceramic.

REFERENCES:
patent: 4985381 (1991-01-01), Mori et al.
patent: 5403788 (1995-04-01), Nishida et al.

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