JPS63114500A - Composite piezoelectric member - Google Patents
Composite piezoelectric memberInfo
- Publication number
- JPS63114500A JPS63114500A JP61258254A JP25825486A JPS63114500A JP S63114500 A JPS63114500 A JP S63114500A JP 61258254 A JP61258254 A JP 61258254A JP 25825486 A JP25825486 A JP 25825486A JP S63114500 A JPS63114500 A JP S63114500A
- Authority
- JP
- Japan
- Prior art keywords
- directions
- columnar
- composite piezoelectric
- piezoelectric
- composite
- 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
- 239000002131 composite material Substances 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 abstract 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 4
- 239000011368 organic material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 244000309464 bull Species 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Transducers For Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は多数の柱状圧電体が有機物中に埋め込まれた形
式の複合圧電体に関し、超音波探触子などに好適な種々
の特性を有する複合圧電体に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a composite piezoelectric material in which a large number of columnar piezoelectric materials are embedded in an organic substance, and has various characteristics suitable for ultrasonic probes and the like. Regarding composite piezoelectric materials.
複合圧′０体として、−様な厚さの有機物シート中にジ
ルコン酸チタン酸鉛（ＰＺＴ）などの柱状圧電体がマト
リクス状に規則的に多数同一配列された構成のものが矧
られている。これは、例えばマテリアルス・リサーチ・
プルテン（Ｎｉａｔ、ルｅｓ。As a composite pressure body, there is a structure in which a large number of columnar piezoelectric materials such as lead zirconate titanate (PZT) are regularly and identically arranged in a matrix shape in an organic material sheet with a thickness of -. . This applies to materials research, for example.
Pulten (Niat, le es.
Ｂｕｌｌ、）第１６巻、第６７１〜６８１頁（１９８１
年）に記載されている。しかし、縦、横の２方向で柱状
圧電体の配列を変え、特性の優れた複合圧電体を実現す
る点については配慮されていなかった。Bull, ) Vol. 16, pp. 671-681 (1981
year). However, no consideration was given to realizing a composite piezoelectric material with excellent characteristics by changing the arrangement of the columnar piezoelectric materials in two directions, vertical and horizontal.
超音波診断装置のセンサ（探触子）に用いられる圧電体
は厚み方向の振動を匣っているため、厚み方向のみに振
動する圧電体が望ましい。しかしながら、上記従来構成
の被合圧電体では厚み方向と直交する縦、横の２方向の
振動モードが一致しているのでそれらの振動モードが強
められるという問題があった。さらには、従来構成では
よシ多様性のある圧電体を実現することができないとい
う問題もあった。Since the piezoelectric body used in the sensor (probe) of an ultrasonic diagnostic device contains vibrations in the thickness direction, a piezoelectric body that vibrates only in the thickness direction is desirable. However, in the piezoelectric body having the conventional structure described above, since the vibration modes in two directions, vertical and horizontal, which are perpendicular to the thickness direction, are the same, there is a problem in that these vibration modes are intensified. Furthermore, there is a problem in that the conventional configuration cannot realize a piezoelectric body with a wide variety of properties.
本発明の目的は、高性能でさらによシ多様性のある複合
圧電体の構成を提供することにある。An object of the present invention is to provide a composite piezoelectric structure with high performance and greater versatility.
上記目的は、柱状圧電体の幅あるいは柱状圧電体間の間
隙のうち少なくとも１つを、柱状圧電体の配列される２
方向において変えるかあるいは柱状圧電体の形状を変え
るか、さらにはその両方の手段を用いて複合圧電体を構
成することにより達成される。The above purpose is to reduce at least one of the width of the columnar piezoelectric bodies or the gap between the columnar piezoelectric bodies to two
This can be achieved by changing the direction or changing the shape of the columnar piezoelectric body, or by using both means to construct a composite piezoelectric body.
本発明では、柱状圧電体の憑動状態を縦、横の２方向で
変化させることで、複合圧電体としての全体的な特性を
望ましい方向に変えることができる。すなわち、本発明
では好ましくない振動を２方向に分散させ、よシ理想的
な厚み振動をする複−合圧電体を実現できる。さらＫは
こうすることでより多様性のある特性の複合圧電体を実
現することも可能となる。In the present invention, the overall characteristics of the composite piezoelectric material can be changed in a desirable direction by changing the state of attachment of the columnar piezoelectric material in two directions, vertical and horizontal. That is, according to the present invention, it is possible to disperse undesirable vibrations in two directions and realize a composite piezoelectric body that exhibits ideal thickness vibrations. Furthermore, by doing so, it is also possible to realize a composite piezoelectric material with more diverse characteristics.
以下、本発明の一実施例を第１図により説明する。第１
図（Ａ）は複合圧電体１０１を示し、１０２はＰＺＴな
どの柱状圧電体、１０３は有機物である。１０２の配列
方向をＸ、Ｘと直交する方向をＹ％Ｘ、 Ｙ方向の１０
２の幅をそれぞれＷＸ。An embodiment of the present invention will be described below with reference to FIG. 1st
Figure (A) shows a composite piezoelectric material 101, 102 is a columnar piezoelectric material such as PZT, and 103 is an organic material. 102 arrangement direction is X, the direction orthogonal to X is Y%X, 10 in the Y direction
The width of 2 is WX.
ＷＹｓ間隙をｇｘ 、ｇ丁とする。本発明の１つの特徴
は、１０２の幅（Ｗ）、１０２間の間隙（ｇ）のうちの
少なくとも１つをＸ、Ｙ方向で異なる値にした点にある
。さらに、第１図（Ｂ）は真上より見た図で１０２の配
列方向Ｘ、 Ｙが直交しないようにした例である。また
第１図（Ｂ）の形式で％Ｗとｇのうちの少なくとも１つ
をＸ、Ｙ方向で異なる値にすることも可能である。第２
図は複合圧電体の電気インピーダンス特性の比較をした
例で、横軸は周波数ｆ、縦軸はインピーダンスの絶対値
ＩＺ＋と位相ＬＺである。これらでは全て、同一のＰＺ
Ｔ、有機物を用いて複合圧電体を形成し、さらに蒸着に
よりＣｒ−Ａｕ電極を上下面に形成している。なお有機
物としてポリウレタンを用いた。Let the WYs gap be gx and g. One feature of the present invention is that at least one of the width (W) of 102 and the gap (g) between 102 is set to a different value in the X and Y directions. Furthermore, FIG. 1(B) is an example in which the arrangement directions X and Y of 102 are not perpendicular to each other when viewed from directly above. It is also possible to set at least one of %W and g to different values in the X and Y directions in the format shown in FIG. 1(B). Second
The figure shows an example of comparing the electrical impedance characteristics of composite piezoelectric materials, where the horizontal axis is the frequency f, and the vertical axis is the absolute value IZ+ of impedance and the phase LZ. All of these have the same PZ
A composite piezoelectric body is formed using T and an organic substance, and Cr-Au electrodes are further formed on the upper and lower surfaces by vapor deposition. Note that polyurethane was used as the organic material.
厚さは全て０．４ ｙｍで３．５ＭＨｚ付近に厚み振動
共振点がある。第２図（Ａ）〜（Ｄ）ではＸ、Ｙ方向を
直交させ、（Ｅ）では４５°（１３５°）に交叉させて
いる。（Ａ）は従来構成のもので、ｗｘ＝ｗｙ＝０．２
ａＩ、 ｇ ｘ ＝ｇｒ ＝＝０．１５ｓｍとした。All have a thickness of 0.4 ym and a thickness vibration resonance point around 3.5 MHz. In FIGS. 2(A) to 2(D), the X and Y directions are orthogonal, and in FIG. 2(E), they intersect at 45° (135°). (A) is of the conventional configuration, wx=wy=0.2
aI, g x =gr ==0.15sm.
９ＭＨｚ付近に見られる振動はＰＺＴ柱の形状ならびに
Ｘ。The vibrations seen around 9MHz are due to the shape of the PZT pillar and X.
Ｙ方向に同一な配列により生じたもので、厚み方向の振
動を使ってセンサを構成する場合、この９ＭＨ１付近の
振動は好ましくない。したがって、このＱ Ｍ ＨＺ付
近の振動を弱めるか、さらに遠ざけることが望ましい。This vibration is caused by the same arrangement in the Y direction, and when a sensor is constructed using vibration in the thickness direction, this vibration near 9MH1 is not preferable. Therefore, it is desirable to weaken the vibration near this Q MHZ or move it further away.
第１図（Ａ）の構成による実施例を第２図（Ｂ）〜（Ｄ
）に示す。（Ｂ）ではｇのみをＸ、Ｙ方向で変え、ＷＸ
＝ｗｙ ＝Ｑ、２． ｇ ｘ＝０．１５． ｇ
ｒ ＝０．０５としている。これかられかるよう忙、９
Ｍ Ｈｚ付近の振動が弱められていることがわかる。The embodiment according to the configuration of FIG. 1(A) is shown in FIGS. 2(B) to (D).
). In (B), only g is changed in the X and Y directions, and WX
=wy =Q, 2. g x=0.15. g
r = 0.05. I'm busy from now on, 9
It can be seen that vibrations around MHz are weakened.
（Ｃ）はＷのみをＸ、 Ｙ方向で変えたもので、ｗｘ
＝０．２． Ｗ７ ＝Ｑ、ｌ、 ｇｘ ＝ｇｙ ＝０．
１５とした。この場合は９ Ｍ Ｈｚ付近の振動が全く
見られない。（Ｄ）はｗ、ｇの両方をＸ、 Ｙ方向で変
えた例で、Ｗｘ ＝０．２． Ｗｒ ＝０．１． Ｈ
ｚ ＝０．１５゜ｇ ｙ ＝ ０．２５としている。こ
の例でも９ＭＨｚ付近の振動は見られない。このように
本発明によれば特性の優れた複合圧電体を簡単に実現す
ることが可能である。さらに（Ｅ）ではＸ、Ｙ方向を４
５゜とした例であシ、Ｗｚ ＝Ｗｙ ＝ ０．２．
ｇ ｘ ＝ｇ ｒ＝０．１５としている。これかられか
るように特性的には（Ａ）〜（Ｄ）とはかなシ異なった
ものとなっティる。さらに、Ｗ、ｇｔ−Ｘ、Ｙ方向で変
えることも可能である。（Ｂ）〜（Ｅ）のように、不発
明の構成によれば１％性の微妙に異なる複合圧電体をも
実現することが可能で、より多様性のある複合圧電体を
実現できる。(C) is the one where only W is changed in the X and Y directions, wx
=0.2. W7 =Q, l, gx =gy =0.
It was set at 15. In this case, no vibrations around 9 MHz are observed. (D) is an example in which both w and g are changed in the X and Y directions, where Wx = 0.2. Wr=0.1. H
z = 0.15°g y = 0.25. In this example as well, no vibrations around 9 MHz are observed. As described above, according to the present invention, it is possible to easily realize a composite piezoelectric body with excellent characteristics. Furthermore, in (E), the X and Y directions are 4
In this example, Wz = Wy = 0.2.
It is assumed that g x =g r =0.15. As we will see, the characteristics are slightly different from (A) to (D). Furthermore, it is also possible to change in the W, gt-X, and Y directions. As shown in (B) to (E), according to the uninvented configuration, it is possible to realize a composite piezoelectric body with a slightly different 1% property, and it is possible to realize a composite piezoelectric body with more variety.
以上のように、本発明によれば、高性能の複合圧電体な
らびにより多様性のある複合圧電体を容易に実現するこ
とが可能であり、その工学的価値は高い。As described above, according to the present invention, it is possible to easily realize a high-performance composite piezoelectric body and a more diverse composite piezoelectric body, and its engineering value is high.
第１図は本発明の詳細な説明図、第２図は本発明によシ
形成された複合圧電体の特性比較を示す図である。
１０１・・・複合圧電体、１０２・・・柱状圧電体、１
０３・・・有機物。FIG. 1 is a detailed explanatory diagram of the present invention, and FIG. 2 is a diagram showing a comparison of characteristics of composite piezoelectric bodies formed according to the present invention. 101... Composite piezoelectric body, 102... Column piezoelectric body, 1
03...Organic matter.
Claims (1)
複合圧電体において、該柱状圧電体の幅あるいは該柱状
圧電体間の間隙のうち少なくとも１つを、該柱状圧電体
の配列された縦、横の２方向において、変えたことを特
徴とする複合圧電体。 ２、特許請求の範囲第１項記載の複合圧電体において、
該柱状圧電体の配列された２方向が互いに直交せず、そ
れに応じて柱状圧電体の形状を変えたことを特徴とする
複合圧電体。 ３、特許請求の範囲第２項記載の複合圧電体において、
該柱状圧電体の幅あるいは該柱状圧電体間の間隙のうち
少なくとも１つを、該柱状圧電体の配列された２方向に
おいて、変えたことを特徴とする複合圧電体。[Claims] 1. In a composite piezoelectric body having a structure in which a large number of columnar piezoelectric bodies are embedded in an organic substance, at least one of the width of the columnar piezoelectric bodies or the gap between the columnar piezoelectric bodies is A composite piezoelectric material characterized in that the piezoelectric materials are arranged in different directions in two directions, vertical and horizontal. 2. In the composite piezoelectric body according to claim 1,
A composite piezoelectric body characterized in that the two directions in which the columnar piezoelectric bodies are arranged are not orthogonal to each other, and the shape of the columnar piezoelectric body is changed accordingly. 3. In the composite piezoelectric body according to claim 2,
A composite piezoelectric body characterized in that at least one of the width of the columnar piezoelectric bodies or the gap between the columnar piezoelectric bodies is changed in two directions in which the columnar piezoelectric bodies are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61258254A JPS63114500A (en) | 1986-10-31 | 1986-10-31 | Composite piezoelectric member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61258254A JPS63114500A (en) | 1986-10-31 | 1986-10-31 | Composite piezoelectric member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63114500A true JPS63114500A (en) | 1988-05-19 |
Family
ID=17317671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61258254A Pending JPS63114500A (en) | 1986-10-31 | 1986-10-31 | Composite piezoelectric member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63114500A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016507273A (en) * | 2012-12-21 | 2016-03-10 | ヴォルカノ コーポレイションＶｏｌｃａｎｏ Ｃｏｒｐｏｒａｔｉｏｎ | Focused rotation IVUS transducer using single crystal composite material |
-
1986
- 1986-10-31 JP JP61258254A patent/JPS63114500A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016507273A (en) * | 2012-12-21 | 2016-03-10 | ヴォルカノ コーポレイションＶｏｌｃａｎｏ Ｃｏｒｐｏｒａｔｉｏｎ | Focused rotation IVUS transducer using single crystal composite material |
| US11141134B2 (en) | 2012-12-21 | 2021-10-12 | Volcano Corporation | Focused rotational IVUS transducer using single crystal composite material |
| US11998389B2 (en) | 2012-12-21 | 2024-06-04 | Philips Image Guided Therapy Corporation | Focused rotational IVUS transducer using single crystal composite material |
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