JPH02303172A - Piezoelectric porcelain composition - Google Patents
Piezoelectric porcelain compositionInfo
- Publication number
- JPH02303172A JPH02303172A JP1125287A JP12528789A JPH02303172A JP H02303172 A JPH02303172 A JP H02303172A JP 1125287 A JP1125287 A JP 1125287A JP 12528789 A JP12528789 A JP 12528789A JP H02303172 A JPH02303172 A JP H02303172A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- alpha
- piezoelectric
- solid solution
- component
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 33
- 229910052573 porcelain Inorganic materials 0.000 title abstract description 15
- 239000006104 solid solution Substances 0.000 claims abstract description 6
- 239000000654 additive Substances 0.000 claims abstract description 4
- 230000000996 additive effect Effects 0.000 claims abstract description 4
- 239000000919 ceramic Substances 0.000 claims description 19
- 239000000126 substance Substances 0.000 claims 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract description 4
- 229910003781 PbTiO3 Inorganic materials 0.000 abstract 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(II) oxide Inorganic materials [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 abstract 1
- 238000010304 firing Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 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 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910020698 PbZrO3 Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000011656 manganese carbonate Substances 0.000 description 1
- 235000006748 manganese carbonate Nutrition 0.000 description 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は圧電性磁器組成物、具体的には、強力超音波振
動子、フィルタ、発振子、超音波探触子など圧電セラミ
ック素子の材料として有用な圧電性磁器組成物に関する
。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to piezoelectric ceramic compositions, specifically materials for piezoelectric ceramic elements such as powerful ultrasonic vibrators, filters, oscillators, and ultrasonic probes. The present invention relates to a piezoelectric ceramic composition useful as a piezoelectric ceramic composition.
(従来の技術)
従来、代表的な圧電材料として知られているチタン酸ジ
ルコン酸鉛磁器に種々の改良を施し、使用目的に応じた
特性を有する圧電磁器組成物が提案されている。例えば
、Pb(Zr、Ti)Osのpbの一部をB a、S
rs Caなどの二価の元素で置換したもの、あるいは
Pb(Ti、 Zr)○、に第三成分としてPb(Mn
+z+5btz3)○5、Pb(Mr++/zSb+z
t)0、あるいはP b(NbαS bt 3a M
n*a I)03を固溶させたもの(特公昭46−1
5979号公報、特公昭47−43513号公報、特公
昭51−11798号公報)などが開発され、実用に供
されている。(Prior Art) Various improvements have been made to lead zirconate titanate porcelain, which has heretofore been known as a typical piezoelectric material, and piezoelectric porcelain compositions having characteristics depending on the purpose of use have been proposed. For example, a part of pb of Pb(Zr,Ti)Os is B a, S
rs Substituted with a divalent element such as Ca, or Pb(Ti, Zr)○, with Pb(Mn) as a third component.
+z+5btz3)○5, Pb(Mr++/zSb+z
t) 0, or P b(NbαS bt 3a M
n*a I) Solid solution of 03 (Special Publication No. 46-1)
Japanese Patent Publication No. 5979, Japanese Patent Publication No. 47-43513, Japanese Patent Publication No. 11798-1982) have been developed and put into practical use.
(発明が解決しようとする課題)
これらの圧電性磁器組成物は、その圧電特性の良否が評
価される電気機械結合係数(Kp)または機械的品質係
数(Qm)のいずれか一方について優れた特性を示すが
、焼成による変形が大きいという問題があった。この問
題は、KpおよびQmの両特性を同時に満足させるもの
を生産しようとする場合に特に著しく、両特性を満足さ
せる焼成体を得ることは事実上不可能であった。例えば
、pb(Mn、/sS btz3)03−P bZ r
o 3− P bT i○3からなる従来の組成物では
、相境界(MPB)の近傍でその特性が良くなるが、K
p=50%、Qm= 2000程度の特性を得ようとす
ると、焼成によりソリやうねりが非常に大きく実用化が
極めて困難であり、しかも、温度特性が極端に悪化する
などの問題があった。(Problems to be Solved by the Invention) These piezoelectric ceramic compositions have excellent properties in either the electromechanical coupling coefficient (Kp) or the mechanical quality coefficient (Qm), which is used to evaluate the quality of the piezoelectric properties. However, there was a problem in that the deformation caused by firing was large. This problem is particularly severe when attempting to produce a product that satisfies both Kp and Qm properties at the same time, and it has been virtually impossible to obtain a fired product that satisfies both properties. For example, pb(Mn,/sS btz3)03-P bZ r
In the conventional composition consisting of o 3-P bT i○3, its properties become better near the phase boundary (MPB), but K
When trying to obtain the characteristics of p=50% and Qm=2000, the warpage and waviness caused by firing are extremely large, making it extremely difficult to put it into practical use, and furthermore, there are problems such as extremely poor temperature characteristics.
従って、本発明は、電気特性および温度特性に優れ、焼
成による変形の小さな圧電性磁器組成物を得ることを主
目的とする。Therefore, the main object of the present invention is to obtain a piezoelectric ceramic composition that has excellent electrical properties and temperature properties and is less deformed by firing.
本発明の他の目的は、電気機械結合係数および機械的品
質係数が共に大きな圧電性磁器組成物を得ることにある
。Another object of the present invention is to obtain a piezoelectric porcelain composition having both a large electromechanical coupling coefficient and a large mechanical quality coefficient.
また、本発明の他の目的は高電圧、高電力で駆動しても
発熱が少ない耐久性に優れた圧電性磁器組成物を得るこ
とにある。Another object of the present invention is to obtain a piezoelectric ceramic composition that generates little heat even when driven at high voltage and high power and has excellent durability.
(課題を解決するための手段)
本発明は、前記課題を解決するための手段として、チタ
ン酸ジルコン酸鉛に第三成分としてpb(MnaSb、
−α)O:+(0,4/3<a<1.5/3゜但し、α
−1/3を除く。)を所定の割合で固溶させるようにし
たものである。(Means for Solving the Problems) The present invention provides lead zirconate titanate with pb (MnaSb,
-α)O:+(0,4/3<a<1.5/3゜However, α
-1/3 excluded. ) is dissolved in solid solution at a predetermined ratio.
すなわち、本発明に係る圧電性磁器組成物は、X−Pb
(MnαSb+−α)O; YPbZrO3Z・Pb
TiOs (式中、X、Y、Zおよびαは各成分のモ
ル分率で、それぞれ、x+y+z=t、oo。That is, the piezoelectric ceramic composition according to the present invention has X-Pb
(MnαSb+-α)O; YPbZrO3Z・Pb
TiOs (where X, Y, Z and α are the mole fractions of each component, x+y+z=t, oo, respectively.
0.4/3≦α≦1.5/3を満足する。但し、α−1
/3を除く。)で示され、第1図において下記組成の点
A、 B、 C,D、 Eを頂点とする多角形ABCD
Eで囲まれた範囲内の組成を有する三成分系固溶体から
なることを特徴とする。0.4/3≦α≦1.5/3 is satisfied. However, α-1
/3 is excluded. ) and whose vertices are points A, B, C, D, and E of the following composition in Figure 1:
It is characterized by consisting of a ternary solid solution having a composition within the range surrounded by E.
X Y Z
A O,010,200,79
B O,010,970,02
CO,030,970,00
D O,200,800,00
E O,200,200,60
また、本発明は、圧電特性をより向上させるため、チタ
ン酸ジルコン酸鉛に第三成分としてPb(MncrSb
、−α)03(0,4/3<α<1.5/3゜但し、α
−1/3を除く。)を所定の割合で固溶させると同時に
、添加物としてCooSNip。X Y Z A O,010,200,79 B O,010,970,02 CO,030,970,00 D O,200,800,00 E O,200,200,60 The present invention also provides piezoelectric properties In order to further improve the performance, Pb (MncrSb
, -α)03(0,4/3<α<1.5/3゜However, α
-1/3 excluded. ) at a predetermined ratio, and at the same time, CooSNip as an additive.
Fe、03およびSnO,からなる群から選ばれた少な
くとも一種を0.05〜0.9重量%させるようにした
ものである。At least one selected from the group consisting of Fe, 03 and SnO is contained in an amount of 0.05 to 0.9% by weight.
(作用)
本発明に係る圧電性磁器組成物の組成範囲を前記範囲に
限定した理由およびそれらの成分の作用は次の通りであ
る。(Function) The reason why the composition range of the piezoelectric ceramic composition according to the present invention is limited to the above range and the effects of these components are as follows.
P b(MnaS )g −a )03は、主として圧
電特性を向上させると同時に、焼成時の変形を抑制する
ために添加されるが、そのモル分率Xが0.01では、
完全な焼成が困難で、圧電性がほとんど改善されないか
、たとえ改善されても実用に供しうる程度にはならず、
また、0.20を超えると、完全に焼成することが著し
く困難となり、得られる磁器の圧電性も実用しうる程度
にはならないので前記範囲とした。Pb(MnaS)g-a)03 is added mainly to improve piezoelectric properties and at the same time to suppress deformation during firing, but when its molar fraction X is 0.01,
Complete firing is difficult, and the piezoelectricity is hardly improved, or even if it is improved, it is not to the extent that it can be put to practical use.
Moreover, if it exceeds 0.20, it becomes extremely difficult to completely fire the ceramic, and the piezoelectricity of the resulting porcelain will not be of a practical level, so it was set in the above range.
また、αが上記範囲外では、圧電性が極端に劣化し実用
には適さないので、αの値は0.4/3〜1.5/3(
但し、α−1/3を除く。)とした。In addition, if α is outside the above range, the piezoelectricity will deteriorate extremely and it will not be suitable for practical use, so the value of α should be 0.4/3 to 1.5/3 (
However, α-1/3 is excluded. ).
PbZrO3のモル分率、即ち、Yが0.20以下また
は0.97を超えると、圧電性か著しく劣化するので前
記範囲とした。If the molar fraction of PbZrO3, that is, Y exceeds 0.20 or less or 0.97, the piezoelectricity deteriorates significantly, so the above range was set.
PbTi0aのモル分率、Zが前記値より多いと、完全
な焼成をするのが困難になり分極処理を完全に遂行する
ことができず、実用的な圧電性磁器を得ることができな
いので0.79以下とした。If the molar fraction of PbTiOa, Z, is greater than the above value, it will be difficult to perform complete firing and the polarization process will not be completed, making it impossible to obtain a practical piezoelectric porcelain. It was set to 79 or less.
また、Cod、Nip、Fe2O*およびSnO2は、
圧電性を向上させるため少なくとも一種添加されるが、
それらの全添加量が0.05重量%未満ではその添加効
果がほとんど得られず、0.9重量%を越えると、完全
に焼成することが著しく困難となり、また、得られた磁
器も実用し得る圧電性を示さないので前記範囲とした。In addition, Cod, Nip, Fe2O* and SnO2 are
At least one element is added to improve piezoelectricity, but
If the total amount added is less than 0.05% by weight, little effect will be obtained, and if it exceeds 0.9% by weight, it will be extremely difficult to fire completely, and the resulting porcelain will not be practical. The above range was set because it did not exhibit the desired piezoelectricity.
(実施例1)
素原料としてPb0(またはPb5O4)、Zr○、、
T i O、、MnCO3および5bto3を用い、こ
れらを生成物か第1表に示す組成を持つように秤量し、
湿式ミルにて約20時間混合し、乾燥させた後、約80
0°Cで2時間仮焼して仮焼粉末を得た。この仮焼粉末
に適量のバインダーを加えて5〜10時間粉砕した後、
80メツシユのふるいを通して造粒し、ふるい下を75
0〜1000 kg/cm’の圧力で直径30IIII
11、厚さ1.On+n+の円板と直径1011111
1、厚さ1.01の円板とに成型した後、第1表に示す
温度で焼成して磁器円板を得た。(Example 1) Pb0 (or Pb5O4), Zr○, as raw materials
Using T i O, MnCO3 and 5bto3, these were weighed so that the product had the composition shown in Table 1,
After mixing in a wet mill for about 20 hours and drying, about 80
Calcined powder was obtained by calcining at 0°C for 2 hours. After adding an appropriate amount of binder to this calcined powder and grinding for 5 to 10 hours,
Granulate through an 80 mesh sieve, and pass through a sieve of 75 mesh.
Diameter 30III at pressure from 0 to 1000 kg/cm'
11. Thickness 1. On+n+ disk and diameter 1011111
1. After molding into a disk with a thickness of 1.01 mm, it was fired at the temperature shown in Table 1 to obtain a porcelain disk.
小径の各磁器円板の両面に銀電極を焼付け、適当な温度
の絶縁オイル中で34〜4.0KV/mmの直流電圧を
印加して分極処理して試料とし、それらの電気機械結合
係数(Kp)、機械的品質係数(Qm)、比誘電率(ε
r)および共振周波数の温度係数(TC)を測定した。Silver electrodes were baked on both sides of each small-diameter porcelain disk, and a DC voltage of 34 to 4.0 KV/mm was applied in insulating oil at an appropriate temperature to polarize the sample.The electromechanical coupling coefficient ( Kp), mechanical quality factor (Qm), dielectric constant (ε
r) and the temperature coefficient (TC) of the resonance frequency were measured.
圧電特性はIRE標準回路を珀いて測定し、比誘電率は
キャパシタンスブリッジを用いて測定した。これらの結
果を焼成による変形度と共に第1表に示す。表中の※印
は本発明の範囲外の組成を示す。なお、セラミックの変
形量は、大径の円板の焼成の前後で、第2図に示すよう
に定盤上に載せ、該定盤と接触片との間の間隔を測定し
て求めた。The piezoelectric properties were measured using an IRE standard circuit, and the dielectric constant was measured using a capacitance bridge. These results are shown in Table 1 along with the degree of deformation due to firing. The * mark in the table indicates a composition outside the scope of the present invention. The amount of deformation of the ceramic was determined by placing a large-diameter disk on a surface plate as shown in FIG. 2 before and after firing, and measuring the distance between the surface plate and the contact piece.
(以 下 余 白)
第1表の結果から明らかなように、本発明に係る圧電性
磁器組成物は、焼成による変形量か従来のものの約10
分の1に低減するだけでなく、その組成を前記範囲内で
適宜設定することにより、従来の2000をはるかに超
えて4000近くにまで達するQmを示し、また、Kp
は20−60%の範囲で任意の値のものか選べ、共振周
波数の温度係数が30 ppm/ ’C以下のものも得
られる。さらに、K t/ K pが大きい、すなわち
、圧電異方性の大きい材料も得られる。(Margins below) As is clear from the results in Table 1, the piezoelectric porcelain composition according to the present invention has a deformation amount of about 10% less than that of the conventional composition due to firing.
By not only reducing the amount to 1/2, but also appropriately setting the composition within the above range, the Qm far exceeds the conventional 2000 and reaches nearly 4000, and the Kp
can be selected from any value in the range of 20-60%, and it is also possible to obtain a temperature coefficient of resonant frequency of 30 ppm/'C or less. Furthermore, a material with a large K t/K p, that is, a material with large piezoelectric anisotropy can also be obtained.
特に、試料番号24.25.30についての結果から明
らかなように、本発明の圧電性磁器組成物は、Kpおよ
びQmpとも著しく太き(、しかも共振周波数の温度特
性も非常に良好な値を示し、焼成による変形量も極めて
少ない。In particular, as is clear from the results for sample number 24.25.30, the piezoelectric ceramic composition of the present invention has significantly thicker Kp and Qmp (and also has very good temperature characteristics of resonance frequency). The amount of deformation due to firing is also extremely small.
さらに、試料番号36〜44についての結果から、三成
分の組成比が同じであっても第三成分であるPb(Mn
αsb、−α)03の組成比、具体的には、αを前記範
囲内の値に設定することによって、共振周波数の温度特
性が向上するが、前記範囲外では圧電性や誘電性が極端
に低く、実用には適さないことが判る。Furthermore, from the results for sample numbers 36 to 44, even if the composition ratios of the three components were the same, the third component, Pb (Mn
αsb, -α)03 composition ratio, specifically, by setting α to a value within the above range, the temperature characteristics of the resonant frequency are improved, but outside the above range, the piezoelectricity and dielectricity are extremely poor. It turns out that it is low and not suitable for practical use.
それ以外の試料でも本発明の範囲内のものは非常によい
周波数安定性を示しておりフィルター用、発振子用とし
て好適である。Other samples within the scope of the present invention exhibit very good frequency stability and are suitable for use in filters and oscillators.
(実施例2)
実施例1で用いた素原料と共にCoo、NiO、Fe、
○、およびSnowを用い、同様にして第2表に示す組
成物からなる圧電性磁器の試料を得、それらの電気機械
結合係数(Kp)、機械的品質係数(Qm)および比誘
電率(εr)を測定した。その結果を第2表に示す。(Example 2) Along with the raw materials used in Example 1, Coo, NiO, Fe,
○ and Snow, piezoelectric porcelain samples made of the compositions shown in Table 2 were similarly obtained, and their electromechanical coupling coefficient (Kp), mechanical quality coefficient (Qm), and relative permittivity (εr ) was measured. The results are shown in Table 2.
(以 下 余 白)
第2表
No、 主成分 添加物 Kp
Qmp εxyz α (重量%)(%)
45*0.06 0.44 0.50 0.9/3
− 45.0 2410 130046/ノ”〃〃
CooO,0552,02490129047//
/l // l/ // Q、10
54.0 2760 130048 //
// // /I N O,1554,
72430145049〃〃” ” NiOO
,0553,62580132050// ”
// // // 0.1G 55.
0 2700 145051//IIノIl//10.
1554.32450147052tt//ノ’”Fe
tusO,0553,22950128053〃〃//
# // 0.10 54.2 259
0 138054 〃// N //
” 0.15 54.0 2370 141055
” ” ” ” 5nOz0.
05 51.0 2890 129056 〃”
// 〃〃0.10 5G、5 2400
132057 〃N 〃〃N O,1550
,52380135058” // //
” IO,3056,42200145059
// // 〃” 〃0.60 58.5
2100 141060 N N 〃〃”
0.90 59.3 1910 1360第2表の
結果から明らかなように、Cod、NiO,Fe、03
またはSnO,を添加することによって、KpおよびQ
+++が共に向上し、Kpが50%以上でQmが200
0以上のものが得られる。(Margin below) Table 2 No. Main ingredient Additive Kp
Qmp εxyz α (weight%) (%)
45*0.06 0.44 0.50 0.9/3
- 45.0 2410 130046/ノ”〃〃
CooO,0552,02490129047//
/l // l/ // Q, 10
54.0 2760 130048 //
// // /I N O, 1554,
72430145049〃〃” ” NiOO
,0553,62580132050//”
// // // // 0.1G 55.
0 2700 145051//IIノII//10.
1554.32450147052tt//ノ'”Fe
tusO,0553,22950128053〃〃//
# // 0.10 54.2 259
0 138054 〃// N //
” 0.15 54.0 2370 141055
” ” ” ” 5nOz0.
05 51.0 2890 129056 〃”
//〃〃0.10 5G, 5 2400
132057 〃N 〃〃NO,1550
,52380135058” // //
” IO, 3056, 42200145059
// // 〃” 〃0.60 58.5
2100 141060 N N 〃〃”
0.90 59.3 1910 1360 As is clear from the results in Table 2, Cod, NiO, Fe, 03
Or by adding SnO, Kp and Q
+++ both improve, Kp is 50% or more and Qm is 200
0 or more can be obtained.
(発明の効果)
以上の説明から明らかなように、本発明によれば、焼成
時の変形が著しく小さく、しかも良好な電気特性および
温度特性を有する圧電性磁器が得られ、大電力を入力し
ても圧電性が劣化しにくい圧電性磁器、高Qmのもの、
高Kpのもの、共振周波数の温度特性の優れたもの、あ
るいは圧電異方性の大きいものなど、用途に応じた任意
の特性のものを得ることができる。(Effects of the Invention) As is clear from the above description, according to the present invention, piezoelectric porcelain that undergoes significantly less deformation during firing and has good electrical and temperature characteristics can be obtained, and a large amount of power can be input. Piezoelectric porcelain with high Qm, whose piezoelectricity does not easily deteriorate even when
It is possible to obtain a material with arbitrary characteristics depending on the application, such as a material with a high Kp, a material with excellent temperature characteristics of resonance frequency, or a material with large piezoelectric anisotropy.
特に、その組成を適宜選定することにより、超音波洗浄
器、超音波加湿器、超音波モータ等の強力超音波振動子
用として適した高Qm、高電気機械結合係数を有し、大
振幅下での発熱が非常に小さいセラミック素子、フィル
タや発振子に適した高Qmで温度特性の良好なセラミッ
ク素子、並びに超音波探触子、水中ソナーなどに適した
圧電異方性の大きなセラミック素子を得ることができる
など、優れた効果が得られる。In particular, by appropriately selecting its composition, it has a high Qm and a high electromechanical coupling coefficient suitable for powerful ultrasonic vibrators such as ultrasonic cleaners, ultrasonic humidifiers, and ultrasonic motors, and can be used under large amplitude conditions. ceramic elements with extremely low heat generation, ceramic elements with high Qm and good temperature characteristics suitable for filters and oscillators, and ceramic elements with large piezoelectric anisotropy suitable for ultrasonic probes, underwater sonar, etc. Excellent effects can be obtained.
第1図は4成分系磁器組成物の印加電圧による表面温度
変化を示す図、第2図は磁器の変形量の測定方法を示す
図である。
1〜定盤、2・・セラミック素子、3〜接触片。FIG. 1 is a diagram showing the change in surface temperature of a four-component ceramic composition due to applied voltage, and FIG. 2 is a diagram showing a method for measuring the amount of deformation of the porcelain. 1 - surface plate, 2... ceramic element, 3 - contact piece.
Claims (2)
rO_3−Z・PbTiO_3(式中、X、Y、Zおよ
びαは各成分のモル分率で、それぞれ、X+Y+Z=1
.00)0.4/3≦α≦1.5/3を満足する。但し
、α=1/3を除く。)で示され、第1図において下記
組成の点A,B,C,D,Eを頂点とする多角形ABC
DEで囲まれた範囲内の組成を有する三成分系固溶体か
らなる圧電性磁器組成物。 ▲数式、化学式、表等があります▼(1) General formula: X・Pb(MnαSb_1_-α)O_3-Y・PbZ
rO_3-Z・PbTiO_3 (where X, Y, Z and α are the mole fractions of each component, respectively, X+Y+Z=1
.. 00) Satisfies 0.4/3≦α≦1.5/3. However, α=1/3 is excluded. ) and whose vertices are points A, B, C, D, and E of the following composition in Figure 1.
A piezoelectric ceramic composition comprising a ternary solid solution having a composition within the range defined by DE. ▲Contains mathematical formulas, chemical formulas, tables, etc.▼
よびSnO_2からなる群から選ばれた少なくとも一種
を0.05〜0.9重量%含有する請求項1記載の圧電
性磁器組成物。(2) The piezoelectric ceramic composition according to claim 1, which contains 0.05 to 0.9% by weight of at least one selected from the group consisting of CoO, NiO, Fe_2O_3, and SnO_2 as an additive.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1125287A JPH02303172A (en) | 1989-05-18 | 1989-05-18 | Piezoelectric porcelain composition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1125287A JPH02303172A (en) | 1989-05-18 | 1989-05-18 | Piezoelectric porcelain composition |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02303172A true JPH02303172A (en) | 1990-12-17 |
Family
ID=14906345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1125287A Pending JPH02303172A (en) | 1989-05-18 | 1989-05-18 | Piezoelectric porcelain composition |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02303172A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0756337A1 (en) * | 1995-07-28 | 1997-01-29 | Nec Corporation | Piezoelectric ceramic material |
FR2813075A1 (en) * | 2000-08-18 | 2002-02-22 | Murata Manufacturing Co | Piezoelectric ceramic material for forming a sintered compact used in the manufacture of piezoelectric devices, such as wave filters and oscillators, comprises a solid solution of a specified crystalline tetragonal system |
-
1989
- 1989-05-18 JP JP1125287A patent/JPH02303172A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0756337A1 (en) * | 1995-07-28 | 1997-01-29 | Nec Corporation | Piezoelectric ceramic material |
FR2813075A1 (en) * | 2000-08-18 | 2002-02-22 | Murata Manufacturing Co | Piezoelectric ceramic material for forming a sintered compact used in the manufacture of piezoelectric devices, such as wave filters and oscillators, comprises a solid solution of a specified crystalline tetragonal system |
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