JPS58188004A - High dielectric constant porcelain composition - Google Patents
High dielectric constant porcelain compositionInfo
- Publication number
- JPS58188004A JPS58188004A JP57070048A JP7004882A JPS58188004A JP S58188004 A JPS58188004 A JP S58188004A JP 57070048 A JP57070048 A JP 57070048A JP 7004882 A JP7004882 A JP 7004882A JP S58188004 A JPS58188004 A JP S58188004A
- Authority
- JP
- Japan
- Prior art keywords
- dielectric constant
- composition
- high dielectric
- present
- porcelain 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.)
- Granted
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はセラミックコンデンサおよび電歪素子などの用
途に適した温度特性のすぐれた高誘電率磁器組成物に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high dielectric constant ceramic composition with excellent temperature characteristics suitable for use in ceramic capacitors, electrostrictive elements, and the like.
従来、上記の用途には、ＢａＴｉ Ｏｓ 、 Ｂａ５
ｎＯ３）ＣａＴｉＯｓなどを主成分とし、これを種々の
添加物などで変性した磁器が実用化されている。これら
の磁器は、常温付近の誘電率が大きくなると誘電率の温
度変化率が大きくなるものであり、一方、読′直率の温
度変化率が小さくなると誘電率が小さくなるものであっ
て、銹′市率が大きく同時に誘゛市十の温度変化率の小
さい磁器を？１．）ることけ困ガ１なものであった。Conventionally, for the above applications, BaTiOs, Ba5
Porcelain whose main component is CaTiOs or the like modified with various additives has been put into practical use. For these porcelains, the temperature change rate of the dielectric constant increases as the dielectric constant near room temperature increases, while the dielectric constant decreases as the temperature change rate of the directivity decreases. Porcelain with a large temperature change rate and a small temperature change rate at the same time? 1. ) This was the one thing that bothered me the most.
本発明はこのような欠点を改善し、誘電率が犬きく、か
つ誘電率の温度変化率が小さい磁器組成物を提供するも
のである。すなわち、本発明の組成物はＢａ ＣＴｉｅ
−）（（Ｚｎｙ、 Ｎｂ２／、 ）ｘ：］ ０３ （
たたし、０・０１≦Ｘ≦０・０８）で示される組成（Ｂ
ａ原子の３０％リー１−″を Ｓｒ原子で置換した組成
を含む）よりなることを特徴とする高誘電率磁器組成物
である。The present invention aims to improve these drawbacks and provide a ceramic composition having a high dielectric constant and a small rate of change in dielectric constant with temperature. That is, the composition of the present invention contains Ba CTie
−)((Zny, Nb2/, )x:] 03 (
However, the composition (B
This is a high dielectric constant ceramic composition characterized by comprising a composition in which 30% of the a atoms are replaced with Sr atoms.
誘′＋１８材木Ａの旦備すべき条件としては、その用途
によす異なるが、セラミックコンデンサおよび電否素−
ｆなどでは誘電率が大きく、かつその温度変化率の′１
・さいことが要求される。なお、誘電率が大きいことは
素子の小形に重要である。また、広い温度僅囲で安定し
た特性を得るためには、誘電率の温度変化率の小さいこ
とが望ましい。本発明はこのような用途に適する磁器組
成物を提供することを目的とする。The conditions that must be met for dielectric +18 lumber A vary depending on its use, but it is suitable for ceramic capacitors and electrically conductive materials.
For example f, the dielectric constant is large, and the rate of temperature change is '1
- Requires precision. Note that a high dielectric constant is important for downsizing the device. Furthermore, in order to obtain stable characteristics over a wide temperature range, it is desirable that the rate of change in dielectric constant with temperature is small. An object of the present invention is to provide a ceramic composition suitable for such uses.
以ｔ、本発明の実施例について詳細に説明する。Hereinafter, embodiments of the present invention will be described in detail.
実施例１
原料としてＢａＣＯ５、ＴｉＯ２，ＺｎＯ、Ｎｂ２Ｏ５
オヨび５ｉＣ０３を用いて、これらを下表に示した組成
比に秤量し混合したものを１０００℃で２時間仮焼して
から、ボールミル
のを乾燥したのち、ポリビニルアルコールの水溶液を一
バインダとして直径１３ｍ＋１１１、長さ約１０１２Ｆ
の円柱状に加圧成形し、これを１２’５０〜１６００’
Ｃの範囲内の温度で２時間焼成した。Example 1 BaCO5, TiO2, ZnO, Nb2O5 as raw materials
Using Oyobi 5iC03, these were weighed and mixed in the composition ratio shown in the table below, calcined at 1000℃ for 2 hours, dried in a ball mill, and made with an aqueous solution of polyvinyl alcohol as a binder. 13m+111, length approximately 1012F
Pressure molded into a cylindrical shape of 12'50 to 1600'
It was fired for 2 hours at a temperature within the range of C.
焼成した磁器を厚さ１線に切断し、この両面にＯｒ −
Ａｕを蒸着したのち、誘電率と誘電正接を１ＫＨｚで
、室温において測定した。誘電率の温度変化率は２０’
Ｃを基準として一２５℃〜８５℃の範囲で測定した。そ
の結集を下表に示す。The fired porcelain was cut into a single thickness line, and both sides were coated with Or-
After depositing Au, the dielectric constant and dielectric loss tangent were measured at 1 KHz at room temperature. Temperature change rate of dielectric constant is 20'
Measurements were made in the range of -25°C to 85°C with reference to C. The results are shown in the table below.
」１表において、試料１，７は本発明の範囲外の比較
豐＋例であり、試料２〜６および試料８〜１１は本発明
の実施例である。In Table 1, samples 1 and 7 are comparative examples outside the scope of the present invention, and samples 2 to 6 and samples 8 to 11 are examples of the present invention.
上表から明らかなように、本発明の範囲内の組成物より
なる磁器は、大きな誘電率（３０５６〜６４７２）と比
較的小さな誘電率の温度変化率（−２６〜８５℃の温度
範囲で一３９〜３７％）を示す。また、本発明の範囲内
の組成物は誘電正接も小さい特徴がある。As is clear from the table above, the porcelain made of the composition within the scope of the present invention has a large dielectric constant (3056 to 6472) and a relatively small temperature change rate of dielectric constant (uniform in the temperature range of -26 to 85°C). 39-37%). Furthermore, the composition within the scope of the present invention is characterized by a small dielectric loss tangent.
以」−のように、本発明の組成物を誘電率が大きく、か
つその温度変化率が小さいため、セラミックコンデンサ
材料として有用である。また、本発明の組成物は誘電正
接の小さいことも一つの特徴である。As described below, the composition of the present invention has a large dielectric constant and a small rate of temperature change, making it useful as a ceramic capacitor material. Another feature of the composition of the present invention is that it has a small dielectric loss tangent.
実施例２
実施例１に記載した方法で作製した円板状試料の両電極
間に電圧（０・０１Ｈｚ）を印加し、そのときの試料の
厚さ方向の電歪を差動トランスを用いて測定した。測定
は試料をシリコン油中につけて行なった。試料４，９で
は゛、印加電圧が２０ＫＶ４の場合に′電歪はそれぞれ
０・６１ Ｘｌ ０ と０・５３×１σ３であった。Example 2 A voltage (0.01 Hz) was applied between both electrodes of a disk-shaped sample prepared by the method described in Example 1, and the electrostriction in the thickness direction of the sample at that time was measured using a differential transformer. It was measured. The measurement was performed by immersing the sample in silicone oil. In samples 4 and 9, the electrostriction was 0.61 Xl 0 and 0.53×1σ3, respectively, when the applied voltage was 20 KV4.
また、この歪には両者ともヒステリシスがほとんど認め
られなかった。Moreover, almost no hysteresis was observed in this distortion in both cases.
以」−のように、本発明の組成物では電歪が大きく、か
つ、歪のヒステリシスのほとんどない材料が得られるだ
め、ＶＴＲオートトラッキング用ヘット駆動素イ，ミラ
ー制御素子々どの変位素子に適した組成物でもある。As described below, the composition of the present invention has a large electrostriction and has almost no strain hysteresis, so it is suitable for displacement elements such as head drive elements for VTR auto-tracking and mirror control elements. It is also a composition.
なお、本発明でＸがＱ・０１未満とＸが０・０８を越え
る組成およびＳｒの置換量が３ｏ係を越える組成は誘電
率が小さくなるため、本発明の範囲から除き、本発明の
範囲は誘電率が３０ｏＯ以」二の組成に限定した。In the present invention, compositions in which X is less than Q.01, compositions in which X exceeds 0.08, and compositions in which the amount of Sr substitution exceeds the 3o coefficient are excluded from the scope of the present invention because their dielectric constants are small. The composition was limited to a composition having a dielectric constant of 30 oO or more.
Claims (2)
）０５、 （ただし、○・ｏ１≦Ｘ≦０・０８）で示さ
れる組成よりなることを特徴とする高誘電率磁器組成物
。(1) BaCT11-x (Zn1/3Nb2/15)x
)05, (provided that ○.o1≦X≦0.08) A high dielectric constant ceramic composition.
ことを特徴とする特許請求の範囲第１項に記載の高誘電
率磁器組成物。(2) The high dielectric constant ceramic composition according to claim 1, wherein 30% or less of Ba atoms are replaced with Sr atoms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57070048A JPS58188004A (en) | 1982-04-26 | 1982-04-26 | High dielectric constant porcelain composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57070048A JPS58188004A (en) | 1982-04-26 | 1982-04-26 | High dielectric constant porcelain composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58188004A true JPS58188004A (en) | 1983-11-02 |
| JPS6116133B2 JPS6116133B2 (en) | 1986-04-28 |
Family
ID=13420287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57070048A Granted JPS58188004A (en) | 1982-04-26 | 1982-04-26 | High dielectric constant porcelain composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58188004A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0200200A2 (en) * | 1985-05-01 | 1986-11-05 | Tam Ceramics, Inc. | Dielectric compositions |
| JPS63156062A (en) * | 1986-08-28 | 1988-06-29 | 株式会社東芝 | High permittivity ceramic composition and manufacture |
-
1982
- 1982-04-26 JP JP57070048A patent/JPS58188004A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0200200A2 (en) * | 1985-05-01 | 1986-11-05 | Tam Ceramics, Inc. | Dielectric compositions |
| JPS63156062A (en) * | 1986-08-28 | 1988-06-29 | 株式会社東芝 | High permittivity ceramic composition and manufacture |
| JPH054354B2 (en) * | 1986-08-28 | 1993-01-19 | Tokyo Shibaura Electric Co |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6116133B2 (en) | 1986-04-28 |
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