JPS61292384A - Piezoelectric ceramic compound - Google Patents
Piezoelectric ceramic compoundInfo
- Publication number
- JPS61292384A JPS61292384A JP60133683A JP13368385A JPS61292384A JP S61292384 A JPS61292384 A JP S61292384A JP 60133683 A JP60133683 A JP 60133683A JP 13368385 A JP13368385 A JP 13368385A JP S61292384 A JPS61292384 A JP S61292384A
- Authority
- JP
- Japan
- Prior art keywords
- piezoelectric ceramic
- ceramic compound
- lead
- piezoelectric
- ceramic composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、チタン酸鉛(Pb Tl 03 )と、ジル
コン酸鉛(Pb Zr 03 )との固溶体を主成分と
する、いわゆる二成分系の圧電性磁器組成物の誘電率の
向上に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a so-called two-component system consisting mainly of a solid solution of lead titanate (Pb Tl 03 ) and lead zirconate (Pb Zr 03 ). This invention relates to improving the dielectric constant of piezoelectric ceramic compositions.
本発明の圧電性磁器組成物は、高い誘電率と良好な径方
向結合係数kpとを有し、音響ピックアップ素子、圧電
点火素子、圧電アクチュエータ素子等として有用である
。The piezoelectric ceramic composition of the present invention has a high dielectric constant and a good radial coupling coefficient kp, and is useful as an acoustic pickup element, a piezoelectric ignition element, a piezoelectric actuator element, etc.
[従来の技術]
従来、音響ピックアップ素子、圧電点火素子、圧電アク
チュエータ素子等として用いる圧電性磁器組成物として
は、例えば米国特許2906710号に開示されている
ように、チタン酸鉛とジルコン酸鉛との固溶体を主成分
とする、いわゆる二成分系の圧電性磁器組成物が知られ
ている。[Prior Art] Conventionally, piezoelectric ceramic compositions used as acoustic pickup elements, piezoelectric ignition elements, piezoelectric actuator elements, etc. include lead titanate, lead zirconate, and the like, as disclosed in U.S. Pat. No. 2,906,710, for example. A so-called two-component piezoelectric porcelain composition is known, which has a solid solution of as a main component.
しかし、上記各種圧電素子を搭載する装置の小型化、あ
るいは、該装置に要求される性能の高度化に鑑み、近年
、上記圧電性磁器組成物の誘電率の向上が課題とされて
いる。However, in view of the miniaturization of devices equipped with the various piezoelectric elements described above, or the increasing performance required of such devices, in recent years, improvement of the dielectric constant of the piezoelectric ceramic composition has been an issue.
[発明が解決しようとする問題点]
本発明は、かかる要請に応えるべく達成されたものであ
り、高い誘電率と、良好な径方向結合係数kpとを有す
る圧電性磁器組成物を提供することを目的とする。[Problems to be Solved by the Invention] The present invention has been achieved in response to such demands, and it is an object of the present invention to provide a piezoelectric ceramic composition having a high dielectric constant and a good radial coupling coefficient kp. With the goal.
[問題点を解決するための手段及び作用]本発明は、従
来提供されているPbTi03−pbzrO3系の圧電
性磁器組成物に、酸化ジスプロシウム(DVzOs)を
添加したものである。[Means and effects for solving the problems] The present invention is a composition in which dysprosium oxide (DVzOs) is added to a conventionally provided PbTi03-pbzrO3 type piezoelectric ceramic composition.
即ち本発明は、
チタン酸鉛(Pb Tl 03 )とジルコン酸鉛(P
b Zr 03 )の固溶体であるジルコンチタン酸鉛
(Pb (TiyCZr I−χ)O3 )を主成分
とする二成分系の圧電性磁器組成物であって、0.05
〜2.0モル%の酸化ジスプロシウム(DVzOs)が
添加されていることを特徴とする圧電性磁器組成物であ
る。That is, the present invention uses lead titanate (Pb Tl 03 ) and lead zirconate (P
A two-component piezoelectric ceramic composition mainly composed of lead zirconium titanate (Pb(TiyCZrI-χ)O3), which is a solid solution of 0.05
This is a piezoelectric ceramic composition characterized in that ~2.0 mol % of dysprosium oxide (DVzOs) is added.
上記において、鉛(、Pb)の20 ate%以下をス
トロンチウム(Sr)、カルシウム(Ca>、バリウム
(Ba )の一種以上で置換しても良い。In the above, 20 ate% or less of lead (Pb) may be replaced with one or more of strontium (Sr), calcium (Ca>, and barium (Ba)).
又ジルコンチタン酸鉛(Pb (Tix Zr I−
)C)O3)において、チタン(Ti >とジルコニウ
ム(Zr )のモル分率Xは、x=0.4〜0.6の範
囲とする。Also, lead zirconium titanate (Pb (Tix Zr I-
)C)O3), the molar fraction X of titanium (Ti> and zirconium (Zr)) is in the range of x=0.4 to 0.6.
本発明の圧電性磁器組成物における誘電率の向上は、ジ
スプロシウムイオン(Dy3”)を含有させたことによ
る効果であると考えられる。したがって、ジスプロシウ
ムイオン(Dy 3 ” )を前記固溶体中に含有せし
め得るジスプロシウム化合物であって前記酸化ジスプロ
シウム(DVzOs)O.05〜2.0モルとモル数に
おいて等価な化合物を添加した圧電性磁器組成物は、本
発明と等価であると考えられる。It is believed that the improvement in dielectric constant in the piezoelectric ceramic composition of the present invention is due to the effect of containing dysprosium ions (Dy3''). A dysprosium compound obtained from the dysprosium oxide (DVzOs) O. A piezoelectric ceramic composition to which a compound equivalent in number of moles of 0.05 to 2.0 moles is added is considered to be equivalent to the present invention.
[実施例] 以下、本発明を具体的な実施例に基づいて説明する。[Example] The present invention will be described below based on specific examples.
(試料の製造)
(a ) P b (T r□、41 Z r o、
sz ) 03主成分であるジルコンチタン酸鉛の成分
比が上第1表
―
□□□□−一」
2値となるように、酸化鉛(Pb 0)50モル%、酸
化チタン(Ti Ot )24モル%、酸化ジルコニウ
ム(Zr Ot )26モル%の割合とした混合粉末に
、酸化ジスプロシウム(DVzOs)粉末を表1に示す
各割合(0,02〜4.0モル%)添加し、これを、ボ
ールミルにて48時時間式混合した後、脱水、乾燥し、
その後空気中において、900℃で1時間仮焼した。(Production of sample) (a) P b (T r□, 41 Z r o,
sz ) 03 Lead oxide (Pb 0 ) 50 mol %, titanium oxide (Ti Ot ) were added so that the component ratio of lead zirconium titanate, which is the main component, was 2 values as shown in Table 1 above. Dysprosium oxide (DVzOs) powder was added in each proportion (0.02 to 4.0 mol%) shown in Table 1 to a mixed powder containing 24 mol% of zirconium oxide (ZrOt) and 26 mol% of zirconium oxide (ZrOt). After mixing in a ball mill for 48 hours, dehydrating and drying,
Thereafter, it was calcined in air at 900°C for 1 hour.
次に、該仮焼粉を再び48時時間式混合した後、脱水、
乾燥し、該乾燥粉末にバインダとしてポリビニルアルコ
ール(PVA)を3wt%加えて造粒し、コレラ、成形
圧力1000ko/c1で、直径201m、厚さ11m
の円盤に成形し、1250℃で1時間焼成した。Next, the calcined powder was mixed again for 48 hours, and then dehydrated.
After drying, 3 wt% of polyvinyl alcohol (PVA) was added as a binder to the dry powder and granulated.
It was molded into a disc and baked at 1250°C for 1 hour.
次に該円盤状成形体に銀電極を付け、シリコンオイル中
において、100℃で5 Q kv/ cmの電界を3
0分間印加して分極処理を施し、表1に示す試料No8
1〜9の圧電素子を製造した。Next, a silver electrode was attached to the disc-shaped molded body, and an electric field of 5 Q kv/cm was applied at 100°C in silicone oil for 3
After applying polarization for 0 minutes, sample No. 8 shown in Table 1 was prepared.
Piezoelectric elements 1 to 9 were manufactured.
(b) <Pbo@aSrom ) (Tio49Z
ro、g7) 03圧電性磁器組成物の主成分である固
溶体の成分比が、上記値となるように調整された酸化1
G(PbO)、酸化ストロンチウム(Sr O) 、酸
化チタン(Tilt)、酸化ジルコニウム(ZrOz)
の混合粉末に、酸化ジスプロシウム(DVzOs)粉末
を表2に示す各割合(0,02〜4.0モル第2表
第3表
%)添加し、これに上記(a)と同様の処理を施して、
表2に示す試料No、10〜17の円盤状の圧電素子を
製造した。(b) <Pbo@aSrom) (Tio49Z
ro, g7) 03 Oxidation 1 in which the component ratio of the solid solution, which is the main component of the piezoelectric ceramic composition, was adjusted to the above value.
G (PbO), strontium oxide (SrO), titanium oxide (Tilt), zirconium oxide (ZrOz)
Dysprosium oxide (DVzOs) powder was added to the mixed powder in the proportions shown in Table 2 (0.02 to 4.0 moles, Table 2, Table 3%), and the same treatment as in (a) above was performed. hand,
Disk-shaped piezoelectric elements of sample Nos. 10 to 17 shown in Table 2 were manufactured.
また、表3に示すように、上記ストロンチウム(S「)
に代えて、バリウム(Ba)、またはカルシウム(Ca
)を、それぞれ表3に示す各割合で用いた試料No、
18〜21の圧電素子を、上記(a>と同様にして製造
した。In addition, as shown in Table 3, the above-mentioned strontium (S'')
Instead of barium (Ba) or calcium (Ca
) were used in the respective proportions shown in Table 3, sample No.
Piezoelectric elements Nos. 18 to 21 were manufactured in the same manner as in (a) above.
(評価)
上記において製造した各試料を、上記分極処理を施した
後24時間放置し、その後、誘電率、及び径方向の結合
係数kpをそれぞれ測定した。その結果を表1〜3、及
び図に示す。(Evaluation) Each of the samples produced above was subjected to the polarization treatment and left for 24 hours, and then the dielectric constant and the radial coupling coefficient kp were measured. The results are shown in Tables 1 to 3 and the figures.
表において、試料N013〜8.12〜16.19.2
1の各試料が本発明の範囲内の圧電素子である。また、
No、1.10.18.20の各試料は、従来より提供
されている圧電素子である。In the table, samples N013-8.12-16.19.2
Each sample of No. 1 is a piezoelectric element within the scope of the present invention. Also,
Samples No. 1, 10, 18, and 20 are piezoelectric elements that have been conventionally provided.
表1よりわかるように、No、3〜8(酸化ジスプロシ
ウムの添加量、0.05〜2.0モル)の各試料の誘電
率は、NO61の試料に比し向上している。また、径方
向結合係数kpも良好である。As can be seen from Table 1, the dielectric constants of samples No. 3 to 8 (added amount of dysprosium oxide, 0.05 to 2.0 mol) were improved compared to sample No. 61. Furthermore, the radial coupling coefficient kp is also good.
また、表2より、鉛(Pb)の一部に代えてストロンチ
ウム(Sr )を用いた場合においても、同様であるこ
とが看取される。Further, from Table 2, it can be seen that the same results are obtained even when strontium (Sr) is used in place of a part of lead (Pb).
また、表3より、上記ストロンチウム(Sr )を、バ
リウム(Ba )またはカルシウム(Ca)で置換して
も良いことがわかる。Further, from Table 3, it can be seen that the above-mentioned strontium (Sr 2 ) may be replaced with barium (Ba 2 ) or calcium (Ca).
[効果]
以上、要するに本発明は、従来提供されているPb T
i 03−Pb Zr 03系の圧電性磁器組成−物に
、酸化ジスプロシウム(DVtO3)を0゜05〜2.
0モル%添加したものである。[Effects] In short, the present invention has the following advantages:
Dysprosium oxide (DVtO3) was added to i 03-Pb Zr 03-based piezoelectric ceramic composition at 0°05 to 2.0°C.
It was added in an amount of 0 mol%.
実施例に詳述したように、本発明の圧電、性磁器組成物
は、従来提供されている圧電性磁器組成物に比し高い誘
電率を有し、また、径方向の結合係数kpも良好である
。これは、ジスプロシウムイオン(Dy 3 ” )を
含有せしめたことによる効果であると考えられる。As detailed in the Examples, the piezoelectric ceramic composition of the present invention has a higher dielectric constant than conventionally provided piezoelectric ceramic compositions, and also has a good radial coupling coefficient kp. It is. This is considered to be an effect due to the inclusion of dysprosium ions (Dy 3 '').
したがって本発明の圧電性磁器組成物は、性能的に良好
であるばかりでなく、小型の装置にも搭載することがで
きるため有用である。Therefore, the piezoelectric ceramic composition of the present invention is useful because it not only has good performance but also can be installed in a small device.
図は、試料N001〜9の比誘電率を表すグラフである
。The figure is a graph showing the relative permittivity of samples Nos. 001 to 9.
Claims (3)
PbZrO_3)の固溶体であるジルコンチタン酸鉛(
Pb(Ti_xZr_1_−_x)O_3)を主成分と
する二成分系の圧電性磁器組成物であつて、0.05〜
2.0モル%の酸化ジスプロシウム(Dy_2O_3)
が添加されていることを特徴とする圧電性磁器組成物。(1) Lead titanate (PbTiO_3) and lead zirconate (
Lead zirconium titanate (PbZrO_3) is a solid solution of
A two-component piezoelectric porcelain composition containing Pb(Ti_xZr_1_-_x)O_3) as the main component,
2.0 mol% dysprosium oxide (Dy_2O_3)
A piezoelectric porcelain composition characterized in that it is added with.
以下が、ストロンチウム(Sr)、カルシウム(Ca)
、バリウム(Ba)の一種以上で置換されている特許請
求の範囲第1項記載の圧電性磁器組成物。(2) In the solid solution, 20 atm% of lead (Pb)
The following are strontium (Sr) and calcium (Ca)
2. The piezoelectric ceramic composition according to claim 1, wherein the piezoelectric ceramic composition is substituted with one or more of barium (Ba).
O_3)において、チタン(Ti)とジルコニウム(Z
r)のモル分率xは、x=0.4〜0.6である特許請
求の範囲第1項記載の圧電性磁器組成物。(3) The solid solution (Pb(Ti_xZr_1_-_x)
O_3), titanium (Ti) and zirconium (Z
2. The piezoelectric ceramic composition according to claim 1, wherein the molar fraction x of r) is from 0.4 to 0.6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60133683A JPS61292384A (en) | 1985-06-19 | 1985-06-19 | Piezoelectric ceramic compound |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60133683A JPS61292384A (en) | 1985-06-19 | 1985-06-19 | Piezoelectric ceramic compound |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61292384A true JPS61292384A (en) | 1986-12-23 |
Family
ID=15110433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60133683A Pending JPS61292384A (en) | 1985-06-19 | 1985-06-19 | Piezoelectric ceramic compound |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61292384A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0196368A (en) * | 1987-10-05 | 1989-04-14 | Matsushita Electric Ind Co Ltd | Manufacture of thin film of ferroelectric substance |
-
1985
- 1985-06-19 JP JP60133683A patent/JPS61292384A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0196368A (en) * | 1987-10-05 | 1989-04-14 | Matsushita Electric Ind Co Ltd | Manufacture of thin film of ferroelectric substance |
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