JPS5830002A - Dielectric porcelain composition - Google Patents
Dielectric porcelain compositionInfo
- Publication number
- JPS5830002A JPS5830002A JP56129249A JP12924981A JPS5830002A JP S5830002 A JPS5830002 A JP S5830002A JP 56129249 A JP56129249 A JP 56129249A JP 12924981 A JP12924981 A JP 12924981A JP S5830002 A JPS5830002 A JP S5830002A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- dielectric constant
- dielectric
- sinterability
- less
- 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】
この発明は高誘電率を有する誘電体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 dielectric ceramic composition having a high dielectric constant.
従来、チタン酸バリウムを主成分とする高誘電率系誘電
体磁器組成物において、誘電率の温度変化を小さくする
ため、チタン酸バリウムに酸化ビスマスのチタン酸塩、
スズ酸塩、ジルコン酸塩あるいは酸化ニオブが数パーセ
ント添加されたものが知られている。しかしながらかか
る組成物によって平坦な誘電率温度特性を有するものは
得られるものの、磁器化のための焼結温度が１３００”
Ｃ前後と高く、小型大容量化を意図して積層コンデンサ
を製造する場合、内部電極には１３００’ｃの温度に耐
えうる高価なＰｔ、Ｐｄなどを用いなければならず、こ
れが積層コンデンサのコストダウンに大きな障害となっ
てい１こ。Conventionally, in high-permittivity dielectric ceramic compositions containing barium titanate as a main component, titanate of bismuth oxide, titanate of bismuth oxide, etc. are added to barium titanate in order to reduce temperature changes in dielectric constant.
Those to which several percent of stannate, zirconate, or niobium oxide are added are known. However, although it is possible to obtain a flat dielectric constant-temperature characteristic with such a composition, the sintering temperature for making porcelain is 1300"
When manufacturing multilayer capacitors with the intention of making them compact and large in capacity, it is necessary to use expensive Pt, Pd, etc., which can withstand temperatures of 1300'C, for the internal electrodes, which increases the cost of multilayer capacitors. This is a big obstacle to getting down.
したがって、この発明はかかる従来例の問題を解消する
こ−とを目的としたもので、焼結温度が１２００℃以下
となり、しかも誘電率が２０００以上で、−５直ト什１
２５°Ｃの広い温度範囲で誘電率温度特性が±２０チ以
内の誘電体磁器組成物を提供セんとするものである。Therefore, the present invention aims to solve the problems of the conventional method, and has a sintering temperature of 1,200°C or less, a dielectric constant of 2,000 or more, and a -5 direct current of 1/2.
It is an object of the present invention to provide a dielectric ceramic composition having a dielectric constant temperature characteristic within ±20 degrees over a wide temperature range of 25°C.
すなわち、仁の発明の要旨とするところは、チタン酸バ
リウム６８．４〜９５．１重量％、Ｂｉ星０３３．５〜
１１．０重量％、Ｔ ｉ ０ 、０．３〜６．０重量％
、Ｌａ、Ｏ，、ＣｅＯ，、Ｎｄ、０１、Ｓ ｎ１ｚ Ｏ
ｓおよびＹ、０，０．４〜３．８重量％、ｐｂ、ｏ鵞０
．４〜８．３重量％、Ｎｂ、０，０．３〜２．５重量％
福寝ｌト１釦壮、かつＴｉＯ□とＢｉ２Ｏ３のモル比（
Ｔ１０、／Ｂｉ、０．）が０，５〜３．５であることを
特徴とする゛ものである。That is, the gist of Jin's invention is that barium titanate 68.4 to 95.1% by weight, Bi star 033.5 to
11.0% by weight, T i 0, 0.3-6.0% by weight
,La,O,,CeO,,Nd,01,S n1z O
s and Y, 0.0.4-3.8% by weight, pb, o 0
．． 4-8.3% by weight, Nb, 0.0.3-2.5% by weight
The molar ratio of TiO□ and Bi2O3 (
T10, /Bi, 0. ) is 0.5 to 3.5.
王妃しＴコ組成範囲に限定し１こ理由は次のとおりであ
る。The reason for limiting the composition range to the queen is as follows.
チタン酸バリウムが６８．４重ｔチ未満になると誘電率
の低下が著しく、９．．５．１重量％を越えると焼結性
、誘電率温度特性が悪（なる。When the barium titanate concentration is less than 68.4 times, the dielectric constant decreases significantly.9. ．． If it exceeds 5.1% by weight, sinterability and dielectric constant temperature characteristics will deteriorate.
Ｂ ｔ ｚ Ｏｚが３．５重量％未満になると焼結性が
悪くなり、１１．０重量％を越えると誘電率の低下が著
しくなる。Ｔｉｅ、が０．３重量％未満になると焼結性
が悪くなり、６．０重量％を越えると誘電率が低下する
。Ｌａ、０３、ＣｅＯ，、Ｎｄ、０３．８ｍ２０．およ
びＹＯの１種が０．４重量％未満になると焼結性、誘電
率温度特性が悪（なり、３．８重量％を越えると誘電率
の低下が著しい。Ｐｂ、０．が０．４重量％未満では誘
電率が低下し、８．３重ｔＳを越えると焼結性、防電損
失、誘電率温度特性が悪くなる。Ｎｂ ２ｏ、が０．３
重量％未滴になると焼結性、誘電率温度特性が悪くなり
、２．５重量％を越えると誘電率の低下が著しくなる。If B tz Oz is less than 3.5% by weight, the sinterability will be poor, and if it exceeds 11.0% by weight, the dielectric constant will be significantly lowered. If Tie is less than 0.3% by weight, the sinterability will deteriorate, and if it exceeds 6.0% by weight, the dielectric constant will decrease. La, 03, CeO,, Nd, 03.8m20. If one of the above and YO is less than 0.4% by weight, the sinterability and dielectric constant temperature characteristics will be poor (and if it exceeds 3.8% by weight, the dielectric constant will drop significantly. If it is less than 8.3% by weight, the dielectric constant will decrease, and if it exceeds 8.3 fold tS, the sinterability, electrical protection loss, and dielectric constant temperature characteristics will deteriorate.Nb 2o is 0.3
If the weight percentage is less than 2.5% by weight, the sinterability and dielectric constant temperature characteristics will deteriorate, and if it exceeds 2.5% by weight, the dielectric constant will drop significantly.
ＴｉＯ２とＢｉ、０３のモル比（Ｔゑ０．／Ｂｉ、０．
）を０．５〜３．５とし１こが、このモル比が０．５未
満になると焼結性が悪くなり、３゜５を、越えると、焼
結性ミ、誘電率温度特性が悪くなる。Molar ratio of TiO2 and Bi, 03 (Ti0./Bi, 0.03)
) is 0.5 to 3.5, but if this molar ratio is less than 0.5, the sinterability will be poor, and if it exceeds 3.5, the sinterability and dielectric constant temperature characteristics will be poor. Become.
以下、この発明を実施例に従って詳細に説明する。Hereinafter, this invention will be explained in detail according to examples.
ＢａＣＯ３とＴｉＯ□を重量比１：１の割合で混合し、
１１００〜１２５０°Ｃで仮焼してＢａＴ ｉＯ、ｊ）
合成し、これを微粉砕し１こ。次に８１表の組成比から
なる磁器が得られるように、原料のＢａＴ１０３、］？
ｉ ２０８、ＴｉＯＬａ ＯＣｅＯ，、Ｎｄ、Ｏｌ、８
ｍ、０３、Ｙ２２％２３％
０３、Ｐｂ、０４、Ｎｂ２Ｏ５を調合し、各調合原料を
バインダとともにボールミルで湿式混合した。水分を蒸
発したのち直径１０Ｍ１厚み１ｍの円板に加圧力２ ｔ
ｏｎ／ｄで加圧成形した。こののち第１表に示す各焼結
温度に１〜２時間保持して焼結体を得た。Mix BaCO3 and TiO□ at a weight ratio of 1:1,
Calcinate at 1100-1250°C to form BaT iO, j)
Synthesize and pulverize this into 1 piece. Next, in order to obtain porcelain having the composition ratio shown in Table 81, the raw material BaT103]?
i 208, TiOLa OCeO,, Nd, Ol, 8
m, 03, Y22% 23% 03, Pb, 04, and Nb2O5 were prepared, and each prepared raw material was wet-mixed with a binder in a ball mill. After evaporating the water, a pressure of 2 t was applied to a disk with a diameter of 10 m and a thickness of 1 m.
Pressure molding was performed on/d. Thereafter, each sintering temperature shown in Table 1 was held for 1 to 2 hours to obtain a sintered body.
得られた焼結体の両面に銀ペーストを塗布し、空気中８
００°Ｃで焼付けて銀電極を形成し、試料のセラミック
コンデンサを作成した。各試料について、誘電率（ε、
誘電損失（ｔａｎδ）、誘電率温度特性（ＴＣ）を測定
し、その結果を焼結温度と共に第１表に示した。Silver paste was applied to both sides of the obtained sintered body, and it was heated in air for 8
A silver electrode was formed by baking at 00°C to create a sample ceramic capacitor. For each sample, the dielectric constant (ε,
Dielectric loss (tan δ) and dielectric constant temperature characteristic (TC) were measured, and the results are shown in Table 1 along with the sintering temperature.
なお、表中※印を付しｆ二試料番号のものはこの発明範
囲外のものであり、それ以外はナベでこの発明範囲内の
ものである。まｆ二表中ＲｅはＬａ ０２ ８％
ＣｅＯ□、Ｎｄ、０．、Ｓｒｎ ｚ Ｏｓ、Ｙ２Ｏ３，
を示す略号である。ま７：を気的特性のうち、誘電率、
誘−損失はＹＨＰモデル４２７０Ａを使用し、温度２５
℃、周波数Ｉ ＫＨｚ、 Ａ Ｃ［ＢＥ Ｉ Ｖの条件
で測定した値である。誘電率温度特性は温度２５℃を基
準に一５５℃と＋１２５°Ｃにおける変化率を示したも
のである。In addition, in the table, those marked with * and the sample number f2 are outside the scope of this invention, and the others are pans and within the scope of this invention. In Table 2, Re is La 02 8% CeO□, Nd, 0. , Srn z Os, Y2O3,
This is an abbreviation that indicates. 7: Of the physical properties, permittivity,
The dielectric loss was measured using YHP model 4270A at a temperature of 25
℃, frequency I KHz, AC [BE IV]. The dielectric constant temperature characteristic shows the rate of change at -55°C and +125°C based on the temperature of 25°C.
・ ）″
・第１表から明りかなように、こｐ発明に′かか
る誘電体磁器組成物は誘電率が２０００以上で、誘電率
温度特性も一５５℃−）−１２５°Ｃの温度範囲におい
て±２０チ以内と小さく、しかも１２００°Ｃ以下の低
温度上焼結が可能なものである。しＴコがって、焼成の
１こめの省エネルギー化が図れ、内部電極として銀糸合
金材料が使用できるため安価な積層コンデンサを提供す
ることが！きる。・ )″
・As is clear from Table 1, the dielectric ceramic composition according to the present invention has a dielectric constant of 2000 or more, and the dielectric constant temperature characteristic is ±20 degrees in the temperature range of -55°C to -125°C. It is small and can be sintered at a low temperature of 1200°C or less. Therefore, it is possible to save energy in the first step of firing, and because silver thread alloy material can be used as the internal electrode, it is possible to provide an inexpensive multilayer capacitor! Wear.
なお、一般に磁器の絶縁性を向上、さセるｒコめ、Ｍｎ
、Ｆｅ、Ｃｒの酸化物が微量添加されるが、この発明に
かかる磁器組成物に適用しても同様の効果が得られる。In general, to improve the insulation properties of porcelain, Mn
Although small amounts of oxides of , Fe, and Cr are added, the same effect can be obtained even when applied to the ceramic composition according to the present invention.
特許出願人 株式会社村田製作所patent applicant Murata Manufacturing Co., Ltd.
Claims (1)
ｉ２０３３．５〜１１．０重量％ 、Ｔ ｉ Ｏ□０．
３〜６．０重量％、Ｌａ２０ ＣｅＯＮｄ０ ８ｍＯ
おＪｃびＹ、Ｏ，（７）う３曳 ２１ ２
３％ ２３ち１種０．４〜３．８重量％、Ｐｂ
５０４０．４〜８．３重量％、Ｎｂ、０，０．３〜２，
５重量ｑｂ鯉誼宣吉賽更勢、かつＴｉＯ，トＢ ｉ 、
Ｏ，ＣＤモに比’ （Ｔ ｉｏ ２／Ｂ ｉ ２０３）
カ０．５〜３．５であることを特徴とする誘電体磁器
組成物。(1) Barium titanate 68.4-95.1% by weight, B
i203.5-11.0% by weight, T i O□0.
3-6.0% by weight, La20CeONd08mO
OJcbi Y, O, (7) U3hiki 21 2
3% 23chi 1 type 0.4-3.8% by weight, Pb
5040.4-8.3% by weight, Nb, 0.0.3-2,
5 weight qb Koi Daisenkichi Saishosei, and TiO, ToB i,
O, compared to CD mode (T io 2/B i 203)
A dielectric ceramic composition characterized in that it has a fragility of 0.5 to 3.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56129249A JPS6018087B2 (en) | 1981-08-17 | 1981-08-17 | dielectric porcelain composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56129249A JPS6018087B2 (en) | 1981-08-17 | 1981-08-17 | dielectric porcelain composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5830002A true JPS5830002A (en) | 1983-02-22 |
| JPS6018087B2 JPS6018087B2 (en) | 1985-05-08 |
Family
ID=15004888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56129249A Expired JPS6018087B2 (en) | 1981-08-17 | 1981-08-17 | dielectric porcelain composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6018087B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03192606A (en) * | 1989-12-20 | 1991-08-22 | Oki Electric Ind Co Ltd | Microwave dielectric ceramics |
| JP2007153659A (en) * | 2005-12-02 | 2007-06-21 | Tdk Corp | Dielectric porcelain composition and electronic component |
-
1981
- 1981-08-17 JP JP56129249A patent/JPS6018087B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03192606A (en) * | 1989-12-20 | 1991-08-22 | Oki Electric Ind Co Ltd | Microwave dielectric ceramics |
| JP2007153659A (en) * | 2005-12-02 | 2007-06-21 | Tdk Corp | Dielectric porcelain composition and electronic component |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6018087B2 (en) | 1985-05-08 |
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