JPH05846B2 - - Google Patents
Info
- Publication number
- JPH05846B2 JPH05846B2 JP59043523A JP4352384A JPH05846B2 JP H05846 B2 JPH05846 B2 JP H05846B2 JP 59043523 A JP59043523 A JP 59043523A JP 4352384 A JP4352384 A JP 4352384A JP H05846 B2 JPH05846 B2 JP H05846B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- voltage
- capacitors
- porcelain
- dielectric constant
- 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.)
- Expired - Lifetime
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- Ceramic Capacitors (AREA)
- Inorganic Insulating Materials (AREA)
Description
〔産業上の利用分野〕
本発明は高い誘電率と、低損失、高い耐電圧、
高い信頼性を有する高圧コンデンサ用磁器誘電体
組成物に関するものである。
〔従来技術及びその問題点〕
従来、カラーテレビやオシロスコープ等の高電
圧回路のように小型で高耐圧、高信頼性（耐湿、
耐熱）、耐コロナ性が要求される直流用高電圧磁
器コンデンサや、送受配電機器の高圧ブツシング
等における電圧分布改善用、回転機器のサージ吸
収用、高圧測定機器の分圧素子や変成器のインピ
ーダンス調整用等の交流用高電圧磁器コンデン
サ、レーザー装置の高電圧電源回路の高圧磁器コ
ンデンサに使用される高圧コンデンサ用磁器誘電
体は、チタン酸バリウム系を主体としたものが使
用されてきたが、チタン酸バリウム系は一般に誘
電体損失が大きい、またその電歪特性からくる高
圧回路での鳴き現象がある、容量、損失の電圧依
存性が大きい等の問題点があつた。
また近年、チタン酸ストロンチウム、酸化ビス
マス酸化チタンを主成分としたもの、更にチタン
酸鉛を加えたものが知られているが、前者は誘電
率が1000程度と低く、また後者は誘電率は向上す
るものの誘電率温度特性が大きい、またこれらに
よる高圧コンデンサのような大型焼結体ではしば
しば磁器の焼成中における還元の原因による高圧
コンデンサとしての寿命が短かい等の問題があつ
た。
〔問題点を解決するための手段〕
本発明者等は前記の如き問題点を解決するため
鋭意研究の結果、以下に示す如き組成物により従
来の磁器誘電体組成物の欠点を改良したすぐれた
ものが得られることを見出したものである。
すなわち、
SrTiO3 20.0〜75.0重量％
PbTiO3 2.0〜40.0重量％
Bi2O3nTiO2 2.0〜38.0重量％
（ｎ＝１〜５）
CaTiO3 0.1〜40.0重量％
MgTiO3 0.1〜25.0重量％
以上の配合比100重量部に対して添加物CoO、
CeO2、Al2O3の中１種または２種以上を0.05〜3.0
重量部添加することを特徴としたものである。
ここでSrTiO3、Bi2O3nTiO2、PbTiO3は常誘
電領域で高い誘電率を得るための組成であり、
CaTiO3、MgTiO3は誘電率温度特性の改良に効
果がある。また添加物CoO、CeO2、Al2O3は高圧
コンデンサの寿命特性を向上するのに著しい効果
が見られる。
〔実施例〕
以下本発明を実施例に基づいて詳細に説明す
る。工業用原料SrCO3、TiO2、PbO、Bi2O3、
MgCO3、CaCO3および添加物CoO、CeO2、Al2
O3を表１の組成比になるように秤量配合し、ポ
ツトミル中で湿式混合し、脱水後800℃〜1000℃
で仮焼成した。次いでこれを粉砕し有機バインダ
ーを加え、造粒した後直径20mm、厚み6.0mmに加
圧成形しついで1160℃〜1260℃の範囲で２時間空
気雰囲気中で焼成した。
このようにして得られた磁器焼結体の両面に銀
電極を焼付けコンデンサを作成し測定用試料とし
た。
その後、それぞれの試料の誘電率εS、損失
tanδ、DC破壊電圧KV／mm、誘電率温度特性変
化率△Ｃ％等の特性値を測定し表１に示した。
[Industrial Application Field] The present invention has high dielectric constant, low loss, high withstand voltage,
The present invention relates to a ceramic dielectric composition for high voltage capacitors that has high reliability. [Prior art and its problems] Conventionally, high-voltage circuits such as color televisions and oscilloscopes have been compact, high voltage resistant, and highly reliable (humidity resistant,
Heat resistance), DC high voltage porcelain capacitors that require corona resistance, voltage distribution improvement in high voltage bushings of power transmission and distribution equipment, surge absorption of rotating equipment, impedance of voltage dividing elements and transformers of high voltage measuring equipment. Porcelain dielectric materials for high-voltage capacitors used in high-voltage porcelain capacitors for alternating current for adjustment purposes and high-voltage porcelain capacitors in high-voltage power supply circuits of laser devices have been mainly made of barium titanate. Barium titanate-based materials generally have problems such as large dielectric loss, noise in high-voltage circuits due to their electrostrictive properties, and large voltage dependence of capacitance and loss. In addition, in recent years, products whose main ingredients are strontium titanate, bismuth oxide, titanium oxide, and products with lead titanate added have become known, but the former has a low dielectric constant of about 1000, and the latter has an improved dielectric constant. However, large sintered bodies such as high-voltage capacitors often have problems such as short life as high-voltage capacitors due to reduction during firing of porcelain. [Means for Solving the Problems] In order to solve the above-mentioned problems, the present inventors have conducted intensive research and have developed an excellent composition that improves the drawbacks of conventional porcelain dielectric compositions by using the composition shown below. It was discovered that something could be obtained. That is, SrTiO 3 20.0-75.0% by weight PbTiO 3 2.0-40.0% by weight Bi 2 O 3 nTiO 2 2.0-38.0% by weight (n=1-5) CaTiO 3 0.1-40.0% by weight MgTiO 3 0.1-25.0% by weight or more Additive CoO per 100 parts by weight of blending ratio,
One or more of CeO 2 and Al 2 O 3 from 0.05 to 3.0
It is characterized in that it is added in parts by weight. Here, SrTiO 3 , Bi 2 O 3 nTiO 2 , and PbTiO 3 are compositions to obtain a high dielectric constant in the paraelectric region,
CaTiO 3 and MgTiO 3 are effective in improving dielectric constant temperature characteristics. Furthermore, additives CoO, CeO 2 and Al 2 O 3 have a remarkable effect on improving the life characteristics of high voltage capacitors. [Example] The present invention will be described in detail below based on Examples. Industrial raw materials SrCO 3 , TiO 2 , PbO, Bi 2 O 3 ,
MgCO3 , CaCO3 and additives CoO, CeO2 , Al2
Weigh and blend O3 to the composition ratio shown in Table 1, wet mix in a pot mill, and heat at 800℃ to 1000℃ after dehydration.
Temporarily fired. Next, this was pulverized, an organic binder was added thereto, granulated, pressure molded to a diameter of 20 mm and a thickness of 6.0 mm, and then baked in an air atmosphere at a temperature of 1160° C. to 1260° C. for 2 hours. Silver electrodes were baked on both sides of the porcelain sintered body thus obtained to prepare a capacitor, which was used as a measurement sample. Then, the permittivity ε S of each sample, the loss
Characteristic values such as tan δ, DC breakdown voltage KV/mm, and rate of change in dielectric constant temperature characteristics ΔC% were measured and are shown in Table 1.
【表】【table】
【表】【table】
【表】【table】
本発明によれば、以上明らかなように、前記の
如き配合のSrTiO3、PbTiO3、Bi2O3nTiO2、
CaTiO3、MgTiO3の主組成に対して添加物CoO、
CeO2、Al2O3を前記の如き割合で添加することに
より、高い誘電率、低損失および高温負荷寿命が
すぐれているという高信頼性を有する高圧コンデ
ンサ用磁器組成物を提供することができる。
According to the present invention, as is clear from the above, SrTiO 3 , PbTiO 3 , Bi 2 O 3 nTiO 2 ,
Additive CoO to the main composition of CaTiO 3 , MgTiO 3 ,
By adding CeO 2 and Al 2 O 3 in the above proportions, it is possible to provide a highly reliable ceramic composition for high voltage capacitors that has a high dielectric constant, low loss, and excellent high-temperature load life. .
第１図は表１に示す試料No.５の表面層（R1）
と内部層（R2）のIR−温度特性図、第２図は同
じく試料No.11のIR−温度特性図、第３図は試料
における表面層と内部層のサンプル取出状態説明
図である。
……表面層、……内部層。
Figure 1 shows the surface layer (R 1 ) of sample No. 5 shown in Table 1.
FIG. 2 is an IR-temperature characteristic diagram of Sample No. 11, and FIG. 3 is an explanatory diagram of the sample extraction state of the surface layer and internal layer of the sample. ...surface layer, ...inner layer.
Claims (1)
CeO2、Al2O3の中１種または２種以上を0.05〜3.0
重量部添加することを特徴とする磁器誘電体組成
物。[Claims] 1 SrTiO 3 20.0 to 75.0% by weight PbTiO 3 2.0 to 40.0% by weight Bi 2 O 3 nTiO 2 2.0 to 38.0% by weight, where n=1 to 5 CaTiO 3 0.1 to 40.0% by weight MgTiO 3 0.1 to 25.0 Weight% Additives CoO, based on 100 parts by weight of the above formulation
One or more of CeO 2 and Al 2 O 3 from 0.05 to 3.0
A porcelain dielectric composition characterized in that part by weight is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4352384A JPS60189107A (en) | 1984-03-07 | 1984-03-07 | Porcelain dielectric composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4352384A JPS60189107A (en) | 1984-03-07 | 1984-03-07 | Porcelain dielectric composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60189107A JPS60189107A (en) | 1985-09-26 |
| JPH05846B2 true JPH05846B2 (en) | 1993-01-06 |
Family
ID=12666103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4352384A Granted JPS60189107A (en) | 1984-03-07 | 1984-03-07 | Porcelain dielectric composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60189107A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2848712B2 (en) * | 1991-02-20 | 1999-01-20 | 太陽誘電株式会社 | Dielectric porcelain composition |
| US6266230B1 (en) | 1998-06-29 | 2001-07-24 | Matsushita Electric Industrial Co., Ltd. | Multilayer ceramic capacitor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS607322B2 (en) * | 1976-09-17 | 1985-02-23 | ソニー株式会社 | Manufacturing method of high dielectric constant porcelain |
| JPS5520609A (en) * | 1978-07-28 | 1980-02-14 | Mitsubishi Electric Corp | Deodorizing apparatus |
-
1984
- 1984-03-07 JP JP4352384A patent/JPS60189107A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60189107A (en) | 1985-09-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |