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LAMINATION TYPE PIEZOELECTRIC ELEMENT
To provide a lamination type piezoelectric element that does not contain lead in its component, can be manufactured by integrated burning with an internal electrode containing a large percentage of silver, and achieves both the long life and excellent piezoelectric characteristics.SOLUTION: A laminated type piezoelectric element 100 comprises: a plurality of piezoelectric ceramic layers 10 that contain alkali niobate having a perovskite-type structure as a main component, contain silver and at least one alkaline earth metal element selected from calcium, strontium, and barium, and contain 0.1 mole or more and 2.0 moles or less of lithium and 1.5 moles or more and 4.0 moles or less of silicon based on 100 moles of the main component in an amount such that the molar ratio of the lithium to the silicon Li/Si becomes 0.025 or more and less than 0.40; and internal electrodes 20 that are arranged between the plurality of piezoelectric ceramic layers 10 and are formed of a metal containing silver in an amount of 80 mass% or more.SELECTED DRAWING: Figure 1
【課題】構成成分に鉛を含まず、銀の含有割合の多い内部電極との一体焼成により製造できると共に、長寿命と優れた圧電特性とが両立された積層型圧電素子を提供する。【解決手段】積層型圧電素子１００は、ペロブスカイト型構造を有するアルカリニオブ酸塩を主成分とし、カルシウム、ストロンチウム及びバリウムから選択される少なくとも１種のアルカリ土類金属元素と銀とを含有し、前記主成分１００モルに対して、０．１モル以上２．０モルのリチウム及び１．５モル以上４．０モル以下のケイ素を、前記ケイ素に対する前記リチウムのモル比Ｌｉ／Ｓｉが０．０２５以上０．４０未満となる量で含有し、複数の圧電セラミックス層１０並びに複数の圧電セラミックス層１０の間に配置され、銀の含有量が８０質量％以上である金属で形成された内部電極２０を備える。【選択図】図１
LAMINATION TYPE PIEZOELECTRIC ELEMENT
To provide a lamination type piezoelectric element that does not contain lead in its component, can be manufactured by integrated burning with an internal electrode containing a large percentage of silver, and achieves both the long life and excellent piezoelectric characteristics.SOLUTION: A laminated type piezoelectric element 100 comprises: a plurality of piezoelectric ceramic layers 10 that contain alkali niobate having a perovskite-type structure as a main component, contain silver and at least one alkaline earth metal element selected from calcium, strontium, and barium, and contain 0.1 mole or more and 2.0 moles or less of lithium and 1.5 moles or more and 4.0 moles or less of silicon based on 100 moles of the main component in an amount such that the molar ratio of the lithium to the silicon Li/Si becomes 0.025 or more and less than 0.40; and internal electrodes 20 that are arranged between the plurality of piezoelectric ceramic layers 10 and are formed of a metal containing silver in an amount of 80 mass% or more.SELECTED DRAWING: Figure 1
【課題】構成成分に鉛を含まず、銀の含有割合の多い内部電極との一体焼成により製造できると共に、長寿命と優れた圧電特性とが両立された積層型圧電素子を提供する。【解決手段】積層型圧電素子１００は、ペロブスカイト型構造を有するアルカリニオブ酸塩を主成分とし、カルシウム、ストロンチウム及びバリウムから選択される少なくとも１種のアルカリ土類金属元素と銀とを含有し、前記主成分１００モルに対して、０．１モル以上２．０モルのリチウム及び１．５モル以上４．０モル以下のケイ素を、前記ケイ素に対する前記リチウムのモル比Ｌｉ／Ｓｉが０．０２５以上０．４０未満となる量で含有し、複数の圧電セラミックス層１０並びに複数の圧電セラミックス層１０の間に配置され、銀の含有量が８０質量％以上である金属で形成された内部電極２０を備える。【選択図】図１
LAMINATION TYPE PIEZOELECTRIC ELEMENT
積層型圧電素子
ITO AKIRA (author) / GOTO TAKAYUKI (author)
2024-02-14
Patent
Electronic Resource
Japanese
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