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发明申请
US20070120446A1 Piezoelectric ceramic composition and piezoelectric element comprising the composition 审中-公开
包含该组合物的压电陶瓷组合物和压电元件

Piezoelectric ceramic composition and piezoelectric element comprising the composition
摘要：
Objects of the present invention are to provide a piezoelectric ceramic composition which contains substantially no lead, which exhibits excellent piezoelectric characteristics, and which has high heat durability; and to provide a piezoelectric element including the composition. The piezoelectric ceramic composition contains M1 (a divalent metallic element, or a metallic element combination formally equivalent to a divalent metallic element); M2 (a tetravalent metallic element, or a metallic element combination formally equivalent to a tetravalent metallic element); and M3 (a metallic element of a sintering aid component), wherein, when these metallic elements constitute the formula [(½)aK2O-(½)bNa2O-cM1O-(½)dNb2O5-eM2O2], a, b, c, d, and e in the formula satisfy the following relations: 0
摘要（中）：

本发明的目的是提供一种基本上不含铅的压电陶瓷组合物，其表现出优异的压电特性，并且具有高耐热性; 并提供包括该组合物的压电元件。 压电陶瓷组合物含有M 1（二价金属元素或正式等价于二价金属元素的金属元素组合）; M 2（四价金属元素或与四价金属元素正式相当的金属元素组合）; 和M 3（烧结助剂组分的金属元素），其中当这些金属元素构成式[（½）aK 2 O-（½）bNa 2 O-cM 1 O-（½）dNb 2 O 5 -eM 2 O 2]，a，b，c，d和 该式中的e满足以下关系：0

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