JP2006056778A - Piezoelectric ceramic composition and piezoelectric ceramic element using it - Google Patents

Piezoelectric ceramic composition and piezoelectric ceramic element using it Download PDF

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JP2006056778A
JP2006056778A JP2005295877A JP2005295877A JP2006056778A JP 2006056778 A JP2006056778 A JP 2006056778A JP 2005295877 A JP2005295877 A JP 2005295877A JP 2005295877 A JP2005295877 A JP 2005295877A JP 2006056778 A JP2006056778 A JP 2006056778A
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piezoelectric ceramic
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JP4281726B2 (en
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Toshikazu Takeda
敏和 竹田
Yukio Sakabe
行雄 坂部
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Murata Manufacturing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition which does not contain a harmful substance of lead (Pb), and the electromechanical coupling coefficient of which is larger than that of a bismuth layered compound, and a piezoelectric ceramic element using it. <P>SOLUTION: The piezoelectric ceramic composition comprises a composition represented by general formula: (Ag<SB>1-x</SB>Li<SB>x</SB>)NbO<SB>3</SB>characterized by 0.075≤x<0.40 as a main component, and contains at least one of Mn oxides and Si oxides as an accessory component. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、圧電磁器組成物およびそれを用いた圧電セラミック素子に関し、特にたとえば、圧電セラミックフィルタ、圧電セラミック発振子等の圧電セラミック素子材料として有用な圧電磁器組成物およびそれを用いた圧電セラミック素子に関する。   The present invention relates to a piezoelectric ceramic composition and a piezoelectric ceramic element using the same, and more particularly to a piezoelectric ceramic composition useful as a piezoelectric ceramic element material such as a piezoelectric ceramic filter and a piezoelectric ceramic oscillator, and a piezoelectric ceramic element using the same. About.

従来より、圧電セラミックフィルタ等の圧電素子には、チタン酸ジルコン酸鉛（Ｐｂ（ＴｉX Ｚｒ1-X ）Ｏ3 ）、または、チタン酸鉛（ＰｂＴｉＯ3 ）を主成分とする圧電磁器組成物が広く用いられている。また、最近ではＣａＢｉ4 Ｔｉ4 Ｏ15などのビスマス層状化合物を主成分とする圧電磁器組成物が開発され始めている。 Conventionally, a piezoelectric ceramic composition such as a piezoelectric ceramic filter has a piezoelectric ceramic composition mainly composed of lead zirconate titanate (Pb (Ti x Zr 1-x ) O 3 ) or lead titanate (PbTiO 3 ). Is widely used. Recently, a piezoelectric ceramic composition mainly composed of a bismuth layered compound such as CaBi 4 Ti 4 O 15 has been developed.

しかしながら、チタン酸ジルコン酸鉛、または、チタン酸鉛を主成分とする圧電磁器組成物は、有害なＰｂ等が含まれているため、製造あるいは廃棄時に環境や人体に関する影響が問題になる。さらに、その製造過程において一般的に鉛酸化物が用いられているが、この鉛化合物の蒸発のため製品の均一性が低下する。また、ビスマス層状化合物を主成分とする圧電磁器組成物は、電気機械結合係数ｋ33が２０％未満と小さいため、広く実用に供されるに至っていない。 However, the piezoelectric ceramic composition mainly composed of lead zirconate titanate or lead titanate contains harmful Pb and the like, and therefore the influence on the environment and human body becomes a problem at the time of manufacture or disposal. Furthermore, lead oxide is generally used in the manufacturing process, but the uniformity of the product is reduced due to evaporation of the lead compound. The piezoelectric ceramic composition mainly composed of a bismuth layer compound, for the electromechanical coupling coefficient k 33 is as small as less than 20%, not come to be subjected to practical use widely.

それゆえに、本発明の主たる目的は、有害物であるＰｂを含まず、ビスマス層状化合物に比べ電気機械結合係数が大きな圧電磁器組成物およびそれを用いた圧電セラミック素子を提供することである。   Therefore, a main object of the present invention is to provide a piezoelectric ceramic composition that does not contain Pb, which is a harmful substance, and has a larger electromechanical coupling coefficient than a bismuth layered compound, and a piezoelectric ceramic element using the same.

本発明にかかる圧電磁器組成物は、
一般式：（Ａｇ1-x Ｌｉx ）ＮｂＯ3 で表される組成を主成分とし、
０．０７５≦ｘ＜０．４０
であることを特徴とし、
Ｍｎ酸化物、Ｓｉ酸化物のうち少なくとも１つを副成分として含有する、圧電磁器組成物である。
また、本発明にかかる圧電磁器組成物は、
一般式：（Ａｇ1-x Ｌｉx ）（Ｎｂ1-y Ｔａy ）Ｏ3 で表される組成を主成分とし、
０．０７５≦ｘ＜０．４０
０＜ｙ＜０．２０
であることを特徴とし、
Ｍｎ酸化物、Ｓｉ酸化物のうち少なくとも１つを副成分として含有する、圧電磁器組成物である。
さらに、本発明にかかる圧電磁器組成物では、上述したＭｎ酸化物が主成分１００重量部に対し、ＭｎＣＯ3に換算して５重量部以下の範囲で含有することが望ましく、また、上述したＳｉ酸化物が主成分１００重量部に対し、ＳｉＯ2に換算して５重量部以下の範囲で含有することが望ましい。
また、本発明にかかる圧電磁器は、上述した各圧電磁器組成物のいずれかを含むものである。
また、本発明にかかる圧電セラミック素子は、上述の圧電磁器に電極を形成したことを特徴とする、圧電セラミック素子である。 The piezoelectric ceramic composition according to the present invention is:
The main component is a composition represented by the general formula: (Ag 1-x Li x ) NbO 3 ,
0.075 ≦ x <0.40
It is characterized by
A piezoelectric ceramic composition containing at least one of Mn oxide and Si oxide as a subcomponent.
Moreover, the piezoelectric ceramic composition according to the present invention is:
The main component is a composition represented by the general formula: (Ag 1-x Li x ) (Nb 1-y Ta y ) O 3 ,
0.075 ≦ x <0.40
0 <y <0.20
It is characterized by
A piezoelectric ceramic composition containing at least one of Mn oxide and Si oxide as a subcomponent.
Furthermore, in the piezoelectric ceramic composition according to the present invention, the above-described Mn oxide is desirably contained in an amount of 5 parts by weight or less in terms of MnCO 3 with respect to 100 parts by weight of the main component. The oxide is preferably contained in an amount of 5 parts by weight or less in terms of SiO 2 with respect to 100 parts by weight of the main component.
Moreover, the piezoelectric ceramic according to the present invention includes any of the above-described piezoelectric ceramic compositions.
A piezoelectric ceramic element according to the present invention is a piezoelectric ceramic element characterized in that an electrode is formed on the above-described piezoelectric ceramic.

本発明にかかる圧電磁器組成物の一般式において、ｘ＜０．０７５の範囲では、圧電体として機能する強誘電相から圧電体として機能しない常誘電相もしくは反強誘電相への転移温度が小さくなり、当該圧電磁器組成物をもって構成された素子の温度安定性の点で問題が生じるため好ましくない。また、０．４０≦ｘの範囲では、共振周波数定数が２０００Ｈｚ／ｍより小さくなるうえ、分極がしづらくなる。また、ｙが０．２０以上の場合も転移温度が小さくなる。そこで本発明では、ｘの範囲を０．０７５≦ｘ＜０．４０とし、ｙの範囲を０＜ｙ＜０．２０とした。
また、本発明において、Ｍｎ酸化物やＳｉ酸化物を主成分に対して添加することにより焼成温度を低下させることができる。なお、Ｍｎ酸化物は、前記主成分１００重量部に対し、ＭｎＣＯ3に換算して５重量部以下の範囲で含有すること、および、Ｓｉ酸化物は、前記主成分１００重量部に対し、ＳｉＯ2に換算して５重量部以下の範囲で含有することが、無添加時の特性を劣化させない点で好ましい。
また、本発明にかかる誘電体磁器組成物は、固溶体であってもよいし、固溶体およびその混合物であってもよい。さらに、本発明にかかる誘電体磁器組成物は、多結晶体であってもよいし、単結晶体であってもよい。 In the general formula of the piezoelectric ceramic composition according to the present invention, in the range of x <0.075, the transition temperature from a ferroelectric phase that functions as a piezoelectric body to a paraelectric or antiferroelectric phase that does not function as a piezoelectric body is small. This is not preferable because a problem arises in terms of temperature stability of an element configured with the piezoelectric ceramic composition. In the range of 0.40 ≦ x, the resonance frequency constant is smaller than 2000 Hz / m, and polarization is difficult. Also, the transition temperature becomes small when y is 0.20 or more. Therefore, in the present invention, the range of x is 0.075 ≦ x <0.40, and the range of y is 0 <y <0.20.
In the present invention, the firing temperature can be lowered by adding Mn oxide or Si oxide to the main component. The Mn oxide is contained in an amount of 5 parts by weight or less in terms of MnCO 3 with respect to 100 parts by weight of the main component, and the Si oxide is SiO 2 with respect to 100 parts by weight of the main component. It is preferable that it is contained in the range of 5 parts by weight or less in terms of 2 from the viewpoint of not deteriorating the characteristics when no additives are added.
The dielectric ceramic composition according to the present invention may be a solid solution, a solid solution, or a mixture thereof. Furthermore, the dielectric ceramic composition according to the present invention may be a polycrystal or a single crystal.

本発明の誘電体磁器組成物を用いれば、有害物であるＰｂを含むことなく、ビスマス層状化合物に比べ電気機械結合係数ｋ33が大きく（２０％以上）実用に供し得る圧電磁器組成物を得ることができる。また、本発明にかかる圧電磁器組成物の主成分に対し、Ｍｎ酸化物、Ｓｉ酸化物のうち少なくとも１つを副成分として含有することで、比誘電率、厚み振動における電気機械結合係数ｋ33、厚み振動における圧電定数ｄ33、厚み振動における共振周波数定数Ｎ、および転移温度などの特性を損なわずに、より低温で焼成することが可能となる。 By using the dielectric ceramic composition of the present invention to obtain a rather large electromechanical coupling coefficient k 33 is compared with the bismuth layered compound (20% higher) piezoelectric ceramic composition that can be put to practical use include a hazardous substance Pb be able to. Further, by containing at least one of Mn oxide and Si oxide as a subcomponent with respect to the main component of the piezoelectric ceramic composition according to the present invention, the dielectric constant and the electromechanical coupling coefficient k 33 in thickness vibration are included. It is possible to perform firing at a lower temperature without impairing characteristics such as the piezoelectric constant d 33 in the thickness vibration, the resonance frequency constant N in the thickness vibration, and the transition temperature.

この発明の上述の目的，その他の目的，特徴および利点は、図面を参照して行う以下の発明を実施するための最良の形態の説明から一層明らかとなろう。   The above object, other objects, features, and advantages of the present invention will become more apparent from the following description of the best mode for carrying out the invention with reference to the drawings.

本発明における誘電体磁器組成物は、通常の強誘電体や、誘電体材料と同様に作製できる。たとえば、まず、Ａｇ2 Ｏ、Ｎｂ2 Ｏ5 、Ｔａ2 Ｏ5 、Ｌｉ2 ＣＯ3 を所定量調合し、水、エタノールなどの溶媒中で、ジルコニアボールなどのメディアとともに４〜２４ｈ混合する。その際、より均一混合とするためにソルビタンエステルなどの分散剤を添加してもよい。その後、混合されたスラリーを乾燥させ、通常の電気炉により、酸化性雰囲気中、８００℃〜１１００℃、１〜２４ｈ仮焼成する。この仮焼物を水、エタノールなどの溶媒中にポリビニルアルコールなどのバインダーとともにメディアにより粉砕、混合し、これを乾燥させる。この乾燥粉末を一軸プレスにより、縦横１２ｍｍ、厚さ３ｍｍの角柱試料を作製する。さらに試料を酸化性雰囲気中、９５０℃〜１２００℃、３〜１０ｈ焼成する。これらの作業により本発明の圧電磁気組成物からなる圧電磁器を得ることができる。以下に、本発明を実施例に基づいて説明する。 The dielectric ceramic composition according to the present invention can be produced in the same manner as a normal ferroelectric or dielectric material. For example, first, Ag 2 O, Nb 2 O 5 , Ta 2 O 5 , and Li 2 CO 3 are mixed in a predetermined amount and mixed with a medium such as zirconia balls in a solvent such as water or ethanol for 4 to 24 hours. At that time, a dispersing agent such as a sorbitan ester may be added for more uniform mixing. Thereafter, the mixed slurry is dried and pre-baked in an oxidizing atmosphere at 800 ° C. to 1100 ° C. for 1 to 24 hours using a normal electric furnace. The calcined product is pulverized and mixed with a medium such as polyvinyl alcohol in a solvent such as water or ethanol, and dried. A prismatic sample having a length and width of 12 mm and a thickness of 3 mm is produced from the dry powder by uniaxial pressing. Further, the sample is baked at 950 ° C. to 1200 ° C. for 3 to 10 hours in an oxidizing atmosphere. By these operations, a piezoelectric ceramic made of the piezoelectric magnetic composition of the present invention can be obtained. Hereinafter, the present invention will be described based on examples.

まず、Ａｇ2 Ｏ、Ｎｂ2 Ｏ5 、Ｔａ2 Ｏ5 、Ｌｉ2 ＣＯ3 の各粉末をｘに従って表１に示すように所定量調合した後、電気炉により、酸化性雰囲気中、８５０℃〜１１００℃、１０ｈ仮焼成を行った。これにより得られた粉末を粉砕し、粉末１００重量部に対しポリビニルアルコールが５重量部となるように混合し、これを乾燥して得た粉末を一軸プレス（１０ｔｏｎ／ｃｍ2 ）で縦横１２ｍｍ、厚み約２．５ｍｍに成形し、角柱試料を得た。これらの試料を表１に示す温度で、酸化性雰囲気中焼成した。 First, a predetermined amount of each powder of Ag 2 O, Nb 2 O 5 , Ta 2 O 5 , and Li 2 CO 3 was prepared as shown in Table 1 according to x, and then in an oxidizing atmosphere in an oxidizing atmosphere at 850 ° C. to Pre-baking was performed at 1100 ° C. for 10 hours. The powder thus obtained was pulverized, mixed so that polyvinyl alcohol was 5 parts by weight with respect to 100 parts by weight of the powder, and dried to obtain a powder obtained by uniaxial pressing (10 ton / cm 2 ) of 12 mm in length and width. Molded to a thickness of about 2.5 mm to obtain a prism sample. These samples were fired in an oxidizing atmosphere at the temperatures shown in Table 1.

Figure 2006056778
Figure 2006056778

その後、Ａｇペーストを試料板端面に塗付し、８００℃にて焼き付けた。その後、絶縁オイルバス中１００℃〜１５０℃で、５０ｋＶ／ｃｍ〜２００ｋＶ／ｃｍの直流電圧を３〜１０分間印加して分極処理を行った。次にダイシングマシーンにて２ｍｍ×２ｍｍ×３ｍｍの角柱に切り出した。このようにして得た試料について比誘電率、厚み振動における電気機械結合係数ｋ33、厚み振動における圧電定数ｄ33、厚み振動における共振周波数定数Ｎ、および転移温度を測定した。その結果を表２に示す。表２のうち、＊印は本発明外の組成を示し、※印は請求項２、３、５、６に係る発明外の組成を示している。表２から本発明の組成範囲において２０％以上の良好な電気機械結合係数ｋ33をもち、転移温度も２００℃以上であるのがわかる。 Thereafter, Ag paste was applied to the end face of the sample plate and baked at 800 ° C. Thereafter, a polarization treatment was performed by applying a DC voltage of 50 kV / cm to 200 kV / cm for 3 to 10 minutes at 100 to 150 ° C. in an insulating oil bath. Next, it cut out into the prism of 2 mm x 2 mm x 3 mm with the dicing machine. The sample thus obtained was measured for relative permittivity, electromechanical coupling coefficient k 33 in thickness vibration, piezoelectric constant d 33 in thickness vibration, resonance frequency constant N in thickness vibration, and transition temperature. The results are shown in Table 2. In Table 2, * indicates a composition outside the present invention, and * indicates a composition outside the invention according to claims 2, 3, 5, and 6. Table 2 shows that the composition range of the present invention has a good electromechanical coupling coefficient k 33 of 20% or more and a transition temperature of 200 ° C. or more.

Figure 2006056778
Figure 2006056778

実施例１と同様に、まず、Ａｇ2 Ｏ、Ｎｂ2 Ｏ5 、Ｔａ2 Ｏ5 、Ｌｉ2 ＣＯ3の各粉末をｘが表３に示すように所定量調合した後、電気炉により、酸化性雰囲気中、９００℃〜１２００℃、１０ｈで仮焼成を行った。これにより得られた粉末にＭｎＣＯ3 および／またはＳｉＯ2 の各粉末を表３のように添加し、その後、該粉末１００重量部に対しポリビニルアルコールが５重量部となるように混合し、これを乾燥して得た粉末を一軸プレス（１０ｔｏｎ／ｃｍ2 ）で縦横１２ｍｍ、厚み約２．５ｍｍに成形し、角柱試料を得た。これら試料を表３に示す温度で、酸化性雰囲気中焼成した。その後、Ａｇペーストを試料板端面に塗付し、８００℃にて焼き付けた。 As in Example 1, first, a predetermined amount of each powder of Ag 2 O, Nb 2 O 5 , Ta 2 O 5 , and Li 2 CO 3 was prepared as indicated by x in Table 3, and then oxidized in an electric furnace. Calcination was performed at 900 ° C. to 1200 ° C. for 10 hours in an acidic atmosphere. Each powder of MnCO 3 and / or SiO 2 was added to the resulting powder as shown in Table 3, and then mixed so that polyvinyl alcohol was 5 parts by weight with respect to 100 parts by weight of the powder. The powder obtained by drying was molded into a length and width of 12 mm and a thickness of about 2.5 mm with a uniaxial press (10 ton / cm 2 ) to obtain a prism sample. These samples were fired in an oxidizing atmosphere at the temperatures shown in Table 3. Thereafter, Ag paste was applied to the end face of the sample plate and baked at 800 ° C.

Figure 2006056778
Figure 2006056778

その後、絶縁オイルバル中１００℃〜１５０℃で、５０ｋＶ／ｃｍ〜２００ｋＶ／ｃｍの直流電圧を３〜１０分間印加して分極処理を行った。次にダイシングマシーンにて２ｍｍ×２ｍｍ×３ｍｍの角柱に切り出した。このようにして得た試料について比誘電率、厚み振動における電気機械結合係数ｋ33、厚み振動における圧電定数ｄ33、厚み振動における共振周波数定数Ｎ、および転移温度を測定した。その結果を表４に示す。表４のうち、＊印は本発明外の組成を示し、※印は請求項２、３、５、６に係る発明外の組成を示している。表４に示すように、ＭｎＣＯ3 および／またはＳｉＯ2 を添加することで、無添加の試料と同等の２０％以上の良好な電気機械結合係数ｋ33をもち、転移温度も２００℃以上であり、焼成温度の低い圧電磁器組成物を得ることができる。 Thereafter, a polarization treatment was performed by applying a DC voltage of 50 kV / cm to 200 kV / cm for 3 to 10 minutes at 100 to 150 ° C. in an insulating oil valve. Next, it cut out into the prism of 2 mm x 2 mm x 3 mm with the dicing machine. The sample thus obtained was measured for relative permittivity, electromechanical coupling coefficient k 33 in thickness vibration, piezoelectric constant d 33 in thickness vibration, resonance frequency constant N in thickness vibration, and transition temperature. The results are shown in Table 4. In Table 4, * indicates a composition outside the present invention, and * indicates a composition outside the invention according to claims 2, 3, 5, and 6. As shown in Table 4, by adding MnCO 3 and / or SiO 2 , it has a good electromechanical coupling coefficient k 33 of 20% or more equivalent to that of the additive-free sample, and the transition temperature is 200 ° C. or more. A piezoelectric ceramic composition having a low firing temperature can be obtained.

Figure 2006056778
Figure 2006056778

図１は本発明にかかる圧電セラミック素子の一例を示す斜視図であり、図２はその断面図である。図１および図２に示す圧電セラミック素子は圧電セラミック振動子１０である。圧電セラミック振動子１０はたとえば直方体状の圧電磁器１２を含む。圧電磁器１２は２枚の圧電磁器層１２ａおよび１２ｂを含む。これらの圧電磁器層１２ａおよび１２ｂは、上述の本発明にかかる圧電磁器組成物からなり、積層されかつ一体的に形成される。また、これらの圧電磁器組成物１２ａおよび１２ｂは、図２の矢印で示すように、同じ厚み方向に分極されている。   FIG. 1 is a perspective view showing an example of a piezoelectric ceramic element according to the present invention, and FIG. 2 is a sectional view thereof. The piezoelectric ceramic element shown in FIGS. 1 and 2 is a piezoelectric ceramic vibrator 10. The piezoelectric ceramic vibrator 10 includes, for example, a rectangular parallelepiped piezoelectric ceramic 12. The piezoelectric ceramic 12 includes two piezoelectric ceramic layers 12a and 12b. These piezoelectric ceramic layers 12a and 12b are made of the above-described piezoelectric ceramic composition according to the present invention, and are laminated and integrally formed. Further, these piezoelectric ceramic compositions 12a and 12b are polarized in the same thickness direction as indicated by arrows in FIG.

圧電磁器層１２ａおよび１２ｂの間には、その中央にたとえば円形の振動電極１４ａが形成され、その振動電極１４ａから圧電磁器１２の一端面にわたってたとえばＴ字形の引出電極１６ａが形成される。また、圧電磁器層１２ａの表面には、その中央にたとえば円形の振動電極１４ｂが形成され、その振動電極１４ｂから圧電磁器１２の他端面にわたってたとえばＴ字形の引出電極１６ｂが形成される。さらに、圧電磁器層１２ｂの表面には、その中央にたとえば円形の振動電極１４ｃが形成され、その振動電極１４ｃから圧電磁器１２の他端面にわたってたとえばＴ字形の引出電極１６ｃが形成される。   Between the piezoelectric ceramic layers 12a and 12b, for example, a circular vibrating electrode 14a is formed at the center, and for example, a T-shaped lead electrode 16a is formed from the vibrating electrode 14a to one end face of the piezoelectric ceramic 12. Further, on the surface of the piezoelectric ceramic layer 12a, for example, a circular vibrating electrode 14b is formed at the center, and for example, a T-shaped lead electrode 16b is formed from the vibrating electrode 14b to the other end face of the piezoelectric ceramic 12. Further, on the surface of the piezoelectric ceramic layer 12b, for example, a circular vibrating electrode 14c is formed at the center thereof, and for example, a T-shaped extraction electrode 16c is formed from the vibrating electrode 14c to the other end surface of the piezoelectric ceramic 12.

そして、引出電極１６ａにはリード線１８ａを介して一方の外部電極２０ａが接続され、引出電極１６ｂおよび１６ｃには別のリード線１８ｂを介して他方の外部電極２０ｂが接続される。   One external electrode 20a is connected to the lead electrode 16a via a lead wire 18a, and the other external electrode 20b is connected to the lead electrodes 16b and 16c via another lead wire 18b.

なお、本発明は、上述の圧電セラミック振動子１０以外の圧電セラミック振動子、圧電セラミックフィルタおよび圧電セラミック発振子などの他の圧電セラミック素子にも適用される。   The present invention is also applicable to other piezoelectric ceramic elements such as piezoelectric ceramic vibrators, piezoelectric ceramic filters, and piezoelectric ceramic oscillators other than the piezoelectric ceramic vibrator 10 described above.

この発明にかかる圧電セラミック振動子の一例を示す斜視図である。1 is a perspective view showing an example of a piezoelectric ceramic vibrator according to the present invention. 図１に示す圧電セラミック振動子の断面図解図である。FIG. 2 is a cross-sectional view of the piezoelectric ceramic vibrator shown in FIG. 1.

符号の説明Explanation of symbols

１０ 圧電セラミック振動子
１２ 圧電磁器
１２ａ、１２ｂ 圧電磁器層
１４ａ、１４ｂ、１４ｃ 振動電極
１６ａ、１６ｂ、１６ｃ 引出電極
１８ａ、１８ｂ リード線
２０ａ、２０ｂ 外部端子 DESCRIPTION OF SYMBOLS 10 Piezoelectric ceramic vibrator | oscillator 12 Piezoelectric ceramic 12a, 12b Piezoelectric ceramic layer 14a, 14b, 14c Vibrating electrode 16a, 16b, 16c Lead electrode 18a, 18b Lead wire 20a, 20b External terminal

Claims (6)

一般式：（Ａｇ1-x Ｌｉx ）ＮｂＯ3 で表される組成を主成分とし、
０．０７５≦ｘ＜０．４０
であることを特徴とし、
Ｍｎ酸化物、Ｓｉ酸化物のうち少なくとも１つを副成分として含有する、圧電磁器組成物。 The main component is a composition represented by the general formula: (Ag 1-x Li x ) NbO 3 ,
0.075 ≦ x <0.40
It is characterized by
A piezoelectric ceramic composition containing at least one of Mn oxide and Si oxide as a subcomponent. 一般式：（Ａｇ1-x Ｌｉx ）（Ｎｂ1-y Ｔａy ）Ｏ3 で表される組成を主成分とし、
０．０７５≦ｘ＜０．４０
０＜ｙ＜０．２０
であることを特徴とし、
Ｍｎ酸化物、Ｓｉ酸化物のうち少なくとも１つを副成分として含有する、圧電磁器組成物。 The main component is a composition represented by the general formula: (Ag 1-x Li x ) (Nb 1-y Ta y ) O 3 ,
0.075 ≦ x <0.40
0 <y <0.20
It is characterized by
A piezoelectric ceramic composition containing at least one of Mn oxide and Si oxide as a subcomponent. 前記Ｍｎ酸化物は前記主成分１００重量部に対し、ＭｎＣＯ3に換算して５重量部以下の重量部範囲で含有する、請求項１または請求項２に記載の圧電磁器組成物。 The piezoelectric ceramic composition according to claim 1 or 2, wherein the Mn oxide is contained in a range of 5 parts by weight or less in terms of MnCO 3 with respect to 100 parts by weight of the main component. 前記Ｓｉ酸化物は前記主成分１００重量部に対し、ＳｉＯ2に換算して５重量部以下の重量部範囲で含有する、請求項１または請求項２に記載の圧電磁器組成物。 The piezoelectric ceramic composition according to claim 1 or 2, wherein the Si oxide is contained in a range of 5 parts by weight or less in terms of SiO 2 with respect to 100 parts by weight of the main component. 請求項１ないし請求項４のいずれかに記載の圧電磁器組成物からなる圧電磁器。   A piezoelectric ceramic comprising the piezoelectric ceramic composition according to any one of claims 1 to 4. 請求項５に記載の圧電磁器に電極を形成したことを特徴とする、圧電セラミック素子。   6. A piezoelectric ceramic element, wherein an electrode is formed on the piezoelectric ceramic according to claim 5.
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DE102009003246A1 (en) 2008-05-30 2009-12-17 DENSO CORPORATION, Kariya-shi Multilayer piezoelectric element and method for its production
US8004161B2 (en) 2008-05-30 2011-08-23 Denso Corporation Multilayered piezoelectric element and method of producing the same
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US8487515B2 (en) 2008-08-29 2013-07-16 Taiyo Yuden Co., Ltd. Piezoelectric ceramic, process for producing the piezoelectric ceramic, and piezoelectric device
DE102010000783A1 (en) 2009-01-12 2010-09-16 Denso Corporation, Kariya-City Piezoelectric ceramics for piezoelectric element, contain crystal grain comprising shell and core phases, each differing in composition and having preset amount of crystal lattice defects
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US8471442B2 (en) 2009-05-08 2013-06-25 Taiyo Yuden Co., Ltd. Piezoelectric ceramic, method for producing same, and piezoelectric device
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US8680745B2 (en) 2010-07-21 2014-03-25 General Electric Company Device for measuring material thickness
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CN114853466B (en) * 2022-04-27 2023-06-23 苏州思萃电子功能材料技术研究所有限公司 Bismuth scandium-lead titanate-based high-temperature piezoelectric ceramic with low-high Wen Sunhao property and preparation method thereof

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