JPH05213668A - Novel dielectric porcelain composition - Google Patents

Novel dielectric porcelain composition

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Publication number
JPH05213668A
JPH05213668A JP4016822A JP1682292A JPH05213668A JP H05213668 A JPH05213668 A JP H05213668A JP 4016822 A JP4016822 A JP 4016822A JP 1682292 A JP1682292 A JP 1682292A JP H05213668 A JPH05213668 A JP H05213668A
Authority
JP
Japan
Prior art keywords
oxide
mol
dielectric
temperature
batio3
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.)
Withdrawn
Application number
JP4016822A
Other languages
Japanese (ja)
Inventor
Kenichi Sakabe
健一 酒部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP4016822A priority Critical patent/JPH05213668A/en
Publication of JPH05213668A publication Critical patent/JPH05213668A/en
Withdrawn legal-status Critical Current

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  • Inorganic Insulating Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Ceramic Capacitors (AREA)

Abstract

PURPOSE:To enable sintering at a low temp., to ensure a high dielectric constant and to inhibit the increase in dielectric loss in a temp. range below Curie point by adding specified amts. of CuO, ZnO, CeO2 and one or more among ZrO2, TiO2 and SnO2 to BaTiO3 and using the resulting dielectric porcelain compsn. for a capacitor. CONSTITUTION:A dielectric porcelain compsn. consisting of, by mol, 82.5-99.1% BaTiO3, 0.3-4% CuO, 0.2-3.5% ZnO, 0.2-5% CeO2 and 0.2-5% one or more among ZrO2, TiO2 and SnO2 is prepd. and 100mol of this compsn. is mixed with 2.5-40mol one or more kinds of compds. selected from among the titanates of lead and alkaline earth metals except BaTiO3, the zirconates and stannates of them such as barium stannate, barium zirconate and lead zirconate. The mixture is mixed in a wet ball mill and dried, a proper amt. of PVA as a granulating agent is added and they are granulated, compacted and sintered at <=1,200 deg.C.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はチタン酸バリウムを原料
とするコンデンサーにおいて高誘電率でキュリー点以下
の温度領域で低い誘電損失を有する低温焼成高誘電率系
誘電体磁器組成物に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low temperature firing high dielectric constant type dielectric ceramic composition having a high dielectric constant and a low dielectric loss in a temperature region below the Curie point in a capacitor made of barium titanate as a raw material. ..

【0002】[0002]

【従来の技術】一般にコンデンサーの容量はJIS規格
により20℃での値で定義されている。チタン酸バリウ
ムを主原料とするコンデンサーはキュリー点での高い誘
電率を利用しているためシフターの添加によりキュリー
点を室温付近までシフトさせている。しかし、誘電損失
の温度特性はキュリー点より低温で急峻に立ち上がるた
め、室温での誘電損失を低下させるためにはキュリー点
を20℃より若干低めに設定することが必要になる。し
かし、これは同時に誘電率の低下をもたらす。
2. Description of the Related Art Generally, the capacitance of a capacitor is defined by the value at 20 ° C. according to the JIS standard. Capacitors that use barium titanate as the main raw material utilize the high dielectric constant at the Curie point, so the addition of a shifter shifts the Curie point to near room temperature. However, since the temperature characteristic of the dielectric loss rises sharply at a temperature lower than the Curie point, it is necessary to set the Curie point slightly lower than 20 ° C. in order to reduce the dielectric loss at room temperature. However, this also causes a decrease in the dielectric constant.

【0003】一方、積層セラミックコンデンサー(ML
C)は近年、誘電体層厚み薄層化が進み、高容量なもの
が得られているが、誘電体層厚みが薄くなるにつれML
Cにかかる実効電界強度は増大し、誘電損失の悪化が問
題になっている。また、チタン酸バリウム系誘電体磁器
組成物は、通常1300〜1400℃の高温で焼成する
ため積層セラミックコンデンサー用原料として用いた場
合、内部電極として高温に耐えうるパラジウム、白金等
の貴金属を使用せざるを得ず、コンデンサーのコストは
著しく高いものとなる。安価な銀を主成分とする内部電
極が使用できる低温焼成誘電体磁器組成物が望まれてい
る。
On the other hand, a monolithic ceramic capacitor (ML
Regarding C), in recent years, the thickness of the dielectric layer has been reduced, and a high-capacity one has been obtained. However, as the dielectric layer becomes thinner, ML
The effective electric field strength applied to C is increased, and deterioration of dielectric loss becomes a problem. Moreover, since the barium titanate-based dielectric ceramic composition is usually fired at a high temperature of 1300 to 1400 ° C., when it is used as a raw material for a laminated ceramic capacitor, a noble metal such as palladium or platinum that can withstand high temperatures should be used as an internal electrode. Inevitably, the cost of capacitors will be significantly higher. A low-temperature fired dielectric ceramic composition that can use an inexpensive internal electrode containing silver as a main component is desired.

【0004】チタン酸バリウムの低温焼成については特
公昭62ー869号公報に銅化合物と元素の周期表の第
IV族元素の化合物を添加することにより1000〜1
250℃の温度で焼成できることが開示されている。し
かし、この方法は得られる誘電体磁器組成物はグレイン
サイズが大きく不均一であり、場合によっては数10μ
mもの異常粒成長が認められる為、電気特性が不安定と
なり特に積層セラミックコンデンサーには事実上使用で
きないものである。また、周期表第IV族元素化合物の
添加量が増大すると低温焼結性に悪影響を及ぼす。
Regarding low-temperature firing of barium titanate, a copper compound and a compound of a group IV element of the periodic table of elements are added to JP-B-62-869 by adding 1000-1.
It is disclosed that it can be fired at a temperature of 250 ° C. However, in this method, the resulting dielectric ceramic composition has a large grain size and is nonuniform, and in some cases, it may be several tens of μm.
Since abnormal grain growth of m is observed, the electrical characteristics become unstable, which makes it practically unusable especially for laminated ceramic capacitors. Further, if the amount of the group IV element compound added in the periodic table is increased, the low temperature sinterability is adversely affected.

【0005】低温焼成が可能であり、かつ誘電損失の小
さな誘電体磁器用組成物として例えば特開昭61ー25
1561号公報に焼結助剤として酸化銅と酸化亜鉛また
は酸化カドミウムを、特開昭61ー251562号公報
に酸化銅と希土類酸化物を用いることにより1200℃
以下での焼成が可能でありかつ誘電損失を低減できるこ
とが開示されている。しかし、この方法では前者は室温
での誘電損失を低減することが可能になるが、キュリー
点以下の温度領域での誘電損失は改善されず、また後者
は室温での高い誘電率が得られ難い点で問題を残してい
る。
As a composition for a dielectric ceramic which can be fired at a low temperature and has a small dielectric loss, for example, JP-A-61-25 is available.
No. 1561 discloses copper oxide and zinc oxide or cadmium oxide as sintering aids, and JP-A No. 61-251562 discloses copper oxide and rare earth oxides at 1200 ° C.
It is disclosed that the firing can be performed below and the dielectric loss can be reduced. However, with this method, the former can reduce the dielectric loss at room temperature, but the dielectric loss in the temperature region below the Curie point is not improved, and the latter is difficult to obtain a high dielectric constant at room temperature. It leaves a problem in terms.

【0006】誘電損失の小さな、バイアス特性の良好な
誘電体磁器組成物として特開昭49ー38196号公
報、特開昭50ー95800号公報、J.Am.Ce
r.Soc.,66(11),p.554(1982)
にはチタン酸ストロンチウムをベースとした誘電体磁器
組成物が、Russell Lee Bolton P
h.D論文、University of Illin
ois(1968)には、酸化バリウムー希土類酸化物
ー酸化チタン系の常誘電体相を利用した温度補償用誘電
体磁器組成物がそれぞれ開示されている。しかしなが
ら、これらの誘電体磁器組成物は極めて良好な誘電損
失、バイアス特性を示すが、誘電率が小さく、事実上、
高容量化には不向きである。
As a dielectric ceramic composition having a small dielectric loss and good bias characteristics, Japanese Patent Laid-Open Nos. 49-38196, 50-95800, and J. Am. Ce
r. Soc. , 66 (11), p. 554 (1982)
The dielectric ceramic composition based on strontium titanate is Russell Lee Bolton P
h. D dissertation, University of Illin
Ois (1968) discloses a dielectric ceramic composition for temperature compensation which utilizes a barium oxide-rare earth oxide-titanium oxide paraelectric phase. However, although these dielectric porcelain compositions show extremely good dielectric loss and bias characteristics, they have a small dielectric constant, and
Not suitable for high capacity.

【0007】また、「積層セラミックコンデンサー」学
献社、p.119(1988)には鉛を主成分とする複
合ペロブスカイトによりバイアス特性の優れた誘電体が
明記されている。鉛系複合ペロブスカイトは一般に高誘
電率、良好なバイアス特性を有するが、誘電損失がキュ
リー点より低温で急峻に立ち上がること、焼結による特
性のばらつきが大きいこと、焼結体の機械的強度が小さ
いこと、等の理由からコンデンサー用誘電体として問題
が多い。
[0007] Also, "Multilayer Ceramic Capacitors" Gakudonsha, p. In 119 (1988), a dielectric having excellent bias characteristics is specified by a composite perovskite containing lead as a main component. Lead-based composite perovskites generally have a high dielectric constant and good bias characteristics, but the dielectric loss rises sharply at a temperature lower than the Curie point, the characteristics vary greatly due to sintering, and the mechanical strength of the sintered body is low. For many reasons, there are many problems as a dielectric material for capacitors.

【0008】[0008]

【発明が解決しようとする課題】本発明は、高誘電率で
キュリー点以下の温度領域で誘電損失が小さな低温焼成
チタン酸バリウム系誘電体磁器組成物を提供するもので
ある。
SUMMARY OF THE INVENTION The present invention provides a low temperature fired barium titanate-based dielectric ceramic composition which has a high dielectric constant and a small dielectric loss in a temperature region below the Curie point.

【0009】[0009]

【課題を解決するための手段】本発明者はチタン酸バリ
ウムに酸化銅、酸化亜鉛、酸化セリウムと、酸化ジルコ
ニウム、酸化チタン、酸化スズの中から選ばれた1種類
以上を組み合わせることにより1200℃以下の低温で
焼結が可能であり、キュリー点以下の温度領域における
誘電損失の増大を抑制し、さらに高い誘電率が実現でき
ることを見い出し本発明に到達した。
The present inventors have combined barium titanate with copper oxide, zinc oxide, cerium oxide and one or more selected from zirconium oxide, titanium oxide and tin oxide at 1200 ° C. The inventors have found that the sintering can be performed at the following low temperature, the increase of the dielectric loss in the temperature range below the Curie point can be suppressed, and a higher dielectric constant can be realized, and the present invention has been achieved.

【0010】すなわち、本発明は下記のとおりである。 1.チタン酸バリウム82.5〜99.1モル%、酸化
銅0.3〜4モル%、酸化亜鉛0.2〜3.5モル%、
酸化セリウム0.2〜5モル%、及び酸化ジルコニウ
ム、酸化チタン、酸化スズの中から選ばれた少なくとも
1種類以上0.2〜5モル%からなる誘電体磁器組成
物。 2.請求項1記載の誘電体磁器組成物100モルに対し
て、アルカリ土類金属および鉛のチタン酸塩(チタン酸
バリウムを除く。)、ジルコン酸塩、スズ酸塩の中から
選ばれた1種以上を2.5〜40モル%含有させてなる
誘導体磁器組成物。
That is, the present invention is as follows. 1. Barium titanate 82.5-99.1 mol%, copper oxide 0.3-4 mol%, zinc oxide 0.2-3.5 mol%,
A dielectric ceramic composition comprising 0.2-5 mol% of cerium oxide and 0.2-5 mol% of at least one selected from zirconium oxide, titanium oxide, and tin oxide. 2. One kind selected from alkaline earth metal and lead titanate (excluding barium titanate), zirconate, and stannate with respect to 100 mol of the dielectric ceramic composition according to claim 1. A derivative porcelain composition containing the above in an amount of 2.5 to 40 mol%.

【0011】チタン酸バリウムに特定量の酸化銅、酸化
亜鉛を添加した誘電体磁器用組成物は1200℃以下で
の温度で焼結することが可能であり、これに酸化セリウ
ムと酸化チタン、酸化ジルコニウム、酸化スズに代表さ
れる、チタンサイトに固溶する酸化物を組み合わせるこ
とによりキュリー点以下の温度領域において誘電損失の
急峻な増大が抑制され、室温での誘電率が飛躍的に増大
する。
A dielectric ceramic composition obtained by adding a specific amount of copper oxide or zinc oxide to barium titanate can be sintered at a temperature of 1200 ° C. or lower, and cerium oxide, titanium oxide, or oxide can be added to the composition. By combining oxides, such as zirconium and tin oxide, which form a solid solution with titanium sites, a steep increase in dielectric loss is suppressed in the temperature region below the Curie point, and the dielectric constant at room temperature is dramatically increased.

【0012】さらにシフターとして特定のチタン酸塩、
ジルコン酸塩、スズ酸塩から選ばれた1種以上を組み合
わせることで上記特性を損ねることなく20℃の誘電率
を12000以上に高めること、温度依存性を制御する
ことが可能である。しかし、使用するシフターの種類に
よりキュリー温度のシフト量、誘電率の極大値さらに温
度依存性が異なるため1種類のシフターを単独で使用す
る事も可能であるが、通常2種類以上のシフターを組み
合わせて使用する事が多い。バリウムサイトに固溶する
元素としてはイオン半径、電荷バランスから鉛およびア
ルカリ土類金属元素、例えばマグネシウム、カルシウ
ム、ストロンチウム、バリウムが効果的であり、チタン
サイトに固溶する元素としてはジルコニウム、スズ、チ
タンが好ましい。一般的にはスズ酸塩、ジルコン酸塩、
チタン酸塩の順でシフト量、極大値での誘電率が大きく
なる傾向を示し、温度依存性は悪化する。特にスズ酸バ
リウム、ジルコン酸バリウム、ジルコン酸鉛を使用した
場合、誘電率が高く、誘電損失、温度特性に優れた誘電
体が得られる。
Further, a specific titanate as a shifter,
By combining one or more selected from zirconates and stannates, it is possible to increase the dielectric constant at 20 ° C. to 12,000 or more and control the temperature dependence without impairing the above properties. However, since the shift amount of Curie temperature, the maximum value of the dielectric constant and the temperature dependence are different depending on the type of shifter used, it is possible to use one type of shifter alone, but usually two or more types of shifters are combined. It is often used as As the element that forms a solid solution in the barium site, ionic radius, lead and alkaline earth metal elements from the charge balance, such as magnesium, calcium, strontium, and barium are effective, and as the element that forms a solid solution in the titanium site, zirconium, tin, Titanium is preferred. Generally stannate, zirconate,
In the order of titanate, the shift amount and the dielectric constant at the maximum value tend to increase, and the temperature dependence deteriorates. In particular, when barium stannate, barium zirconate or lead zirconate is used, a dielectric having a high dielectric constant and excellent dielectric loss and temperature characteristics can be obtained.

【0013】本発明で使用されるチタン酸バリウムは固
相法、液相法、蓚酸塩法、アルコキシド法等のいずれの
方法で製造されたものでも良い。平均粒径が小さく、粒
度分布の均一なものを用いた場合、均一な微構造を有す
る誘電体磁器組成物が得られ電気特性のばらつきが小さ
なものとなる。また、本発明で添加剤として使用する酸
化銅、酸化亜鉛、酸化セリウム、酸化チタン、酸化ジル
コニウム、酸化スズは酸化物をそのまま用いることが出
来るが水酸化物、炭酸塩、硝酸塩等の無機酸塩や蓚酸
塩、アルコキシド等の、いずれも焼結温度以下で分解し
て酸化物となるものであれば使用できる。
The barium titanate used in the present invention may be produced by any method such as a solid phase method, a liquid phase method, an oxalate method and an alkoxide method. When a material having a small average particle size and a uniform particle size distribution is used, a dielectric ceramic composition having a uniform microstructure can be obtained, and variations in electrical characteristics are small. Further, copper oxide, zinc oxide, cerium oxide, titanium oxide, zirconium oxide, tin oxide used as an additive in the present invention can be oxides as they are, but inorganic salts such as hydroxides, carbonates and nitrates. Any of oxalates, alkoxides, and the like can be used as long as they decompose into oxides at the sintering temperature or lower.

【0014】次に本発明で使用した添加剤の量を規定し
た理由について述べる。チタン酸バリウムが99.1モ
ル%以上では1200℃以下での焼結が困難となり、逆
に82.5モル%以下では焼結時に著しい素地の変形が
生じる。酸化銅が0.3モル%以下では焼結性の低下を
招きコンデンサーとして特性の悪化が起こる。4モル%
以上では異常粒成長が認められ、微構造の不均一化、素
地の変形が起こる。酸化セリウムが0.2モル%以下で
はキュリー点以下の温度領域での誘電損失の急峻な増大が抑
制されず、5モル%以上では焼結性を阻害し、実質的に
コンデンサーとして不十分である。酸化チタン、酸化ジ
ルコニウム、酸化スズの中から選ばれた少なくとも1種
以上の酸化物が0.2モル%以下では誘電率の増大効果
が顕著ではなく、5モル%以上では焼結性を阻害する。
酸化セリウムと酸化ジルコニウム、酸化チタン、酸化す
ずの中から選ばれた少なくとも1種類以上の酸化物の和
との比が1:2から2:1の範囲を越えると低温焼結性
を悪化させる。
Next, the reason for defining the amount of the additive used in the present invention will be described. If barium titanate is 99.1 mol% or more, it becomes difficult to sinter at 1200 ° C. or lower, and conversely, if it is 82.5 mol% or less, significant deformation of the base material occurs during sintering. When the content of copper oxide is 0.3 mol% or less, the sinterability is deteriorated and the characteristics of the capacitor deteriorate. 4 mol%
Abnormal grain growth is observed above, uneven microstructure and deformation of the base material occur. When the content of cerium oxide is 0.2 mol% or less, the steep increase in the dielectric loss in the temperature range of the Curie point or lower is not suppressed, and when the content of cerium oxide is 5 mol% or more, the sinterability is impaired, which is substantially insufficient as a capacitor. .. When at least one oxide selected from titanium oxide, zirconium oxide, and tin oxide is 0.2 mol% or less, the effect of increasing the dielectric constant is not remarkable, and when it is 5 mol% or more, the sinterability is impaired. ..
If the ratio of cerium oxide to the sum of at least one oxide selected from zirconium oxide, titanium oxide and tin oxide exceeds the range of 1: 2 to 2: 1, the low temperature sinterability deteriorates.

【0015】また、シフターの種類によりキュリー温度
のシフト量が異なることから、キュリー温度を室温付近
に調整するための添加量を一義的に決定する事はできな
いが、2.5〜40モル%添加することが必要である。
Since the shift amount of the Curie temperature varies depending on the type of shifter, the addition amount for adjusting the Curie temperature to near room temperature cannot be uniquely determined, but 2.5 to 40 mol% is added. It is necessary to.

【0016】[0016]

【実施例】以下に本発明を実施例を示し詳細に説明す
る。また、本発明は実施例により限定されるものではな
い。
The present invention will be described in detail below with reference to examples. Further, the present invention is not limited to the examples.

【0017】[0017]

【実施例1〜6および比較例1】チタン酸バリウム、酸
化銅、酸化亜鉛、酸化セリウム、酸化ジルコニウム、酸
化チタン、及び酸化スズを表1に示す割合で秤量し、湿
式ボールミルで24時間混合した。混合物を乾燥し、P
VAを造粒剤として適当量加え、篩い(100メッシ
ュ)で整粒した後、2ton/cm2 の圧力で直径15
mm、厚み約0.7mmの円板状成形物を作成した。こ
の試料をジルコニア製のセッタに5枚積み重ね、表1に
示す条件で焼成した。得られた円板状磁器の両面に8m
mφの銀電極を塗布、焼き付けし、電気特性測定用試料
とした。誘電率、誘電損失の温度依存性は試料を恒温槽
に入れ、所定の温度に調整した後、LCRメーター
〔(株)安藤電気社製、AG−4304〕を用いて、1
KHz,1V条件下で測定した。焼結体密度の測定は試
料の重量とマイクロメーターで測定した寸法から計算し
た。また、焼結体粒径は表面の走査型電子顕微鏡写真
〔(株)日立製作所製、S800〕を撮り、ラインイン
ターセプト法により求めた。結果を表2に、誘電損失の
温度依存性を図1に示した。なお、比較データとして実
施例2の酸化セリウム無添加のデータを図1に合わせて
示した。
Examples 1 to 6 and Comparative Example 1 Barium titanate, copper oxide, zinc oxide, cerium oxide, zirconium oxide, titanium oxide and tin oxide were weighed in the proportions shown in Table 1 and mixed in a wet ball mill for 24 hours. .. The mixture is dried, P
An appropriate amount of VA as a granulating agent was added, and the particles were sized with a sieve (100 mesh), and then a diameter of 15 was applied at a pressure of 2 ton / cm 2.
A disk-shaped molded product having a thickness of 0.7 mm and a thickness of about 0.7 mm was prepared. Five sheets of this sample were stacked on a zirconia setter and fired under the conditions shown in Table 1. 8m on both sides of the obtained disk-shaped porcelain
A silver electrode of mφ was applied and baked to prepare a sample for measuring electrical characteristics. The temperature dependence of the dielectric constant and the dielectric loss was measured by placing the sample in a constant temperature bath and adjusting it to a predetermined temperature, and then using an LCR meter [AG-4304, manufactured by Ando Electric Co., Ltd.].
It was measured under the conditions of KHz and 1V. The measurement of the density of the sintered body was calculated from the weight of the sample and the dimension measured by the micrometer. The particle size of the sintered body was determined by a line intercept method by taking a scanning electron micrograph (S800, manufactured by Hitachi, Ltd.) of the surface. The results are shown in Table 2, and the temperature dependence of the dielectric loss is shown in FIG. As comparative data, the data of Example 2 without addition of cerium oxide is also shown in FIG.

【0018】表2より明らかなように1200℃以下で
の焼結が可能であり、酸化セリウムを添加することによ
り粒成長が抑制され均一な微構造となる。ただし、5モ
ル%以上では焼結性が阻害され密度低下を招く。また、
酸化ジルコニウム、酸化チタン、酸化スズの添加により
誘電率の極大値は増加する。図1からキュリー点より低
温域での誘電損失の急峻な立ち上がりが抑制されること
がわかる。
As is clear from Table 2, it is possible to sinter at 1200 ° C. or lower, and the addition of cerium oxide suppresses grain growth to form a uniform microstructure. However, if it is 5 mol% or more, the sinterability is impaired and the density is lowered. Also,
The maximum value of the dielectric constant increases with the addition of zirconium oxide, titanium oxide, and tin oxide. It can be seen from FIG. 1 that the steep rise of the dielectric loss in the low temperature region is suppressed from the Curie point.

【0019】[0019]

【実施例7〜13】チタン酸バリウム94.5モル%、
酸化銅1.5モル%、酸化亜鉛2.0モル%、酸化セリ
ウム1.0モル%、酸化ジルコニウム1.0モル%の組
成物100モルに対し表3に示す添加剤(シフター)を
表3に示す量秤量し、実施例1と同一の方法で焼成し、
電気特性、焼結体密度を測定した。結果を表4に示す。
また、誘電損失の温度依存性を図2に示した。なお、比
較データとして実施例7の酸化セリウム無添加のデータ
を図2に合わせて示した。
Examples 7 to 13 Barium titanate 94.5 mol%,
The additive (shifter) shown in Table 3 is added to 100 mol of the composition of copper oxide 1.5 mol%, zinc oxide 2.0 mol%, cerium oxide 1.0 mol% and zirconium oxide 1.0 mol%. And weighed and calcined in the same manner as in Example 1,
The electrical characteristics and the density of the sintered body were measured. The results are shown in Table 4.
The temperature dependence of the dielectric loss is shown in FIG. As comparative data, the data of Example 7 without addition of cerium oxide is also shown in FIG.

【0020】図2より明らかなように種種のシフターと
組み合わせても低温焼結性は損なわれず、酸化セリウム
添加による誘電損失特性の改善効果は著しく、室温の誘
電率を飛躍的に高めることができる。
As is apparent from FIG. 2, the low-temperature sinterability is not impaired even when combined with various kinds of shifters, the effect of improving the dielectric loss characteristics by adding cerium oxide is remarkable, and the dielectric constant at room temperature can be remarkably increased. ..

【0021】[0021]

【表1】 [Table 1]

【0022】[0022]

【表2】 [Table 2]

【0023】[0023]

【表3】 [Table 3]

【0024】[0024]

【表4】 [Table 4]

【0025】[0025]

【発明の効果】本発明の組成物は、低温焼成で得られ、
高誘電率で、キュリー点以下の温度領域において極めて
良好な誘電損失特性を有している。また、酸化チタン、
酸化ジルコニウム、酸化スズに代表されるチタンサイト
に固溶する酸化物を添加することで、誘電率の極大値を
増大することが可能になったものであり、コンデンサー
用誘電体として好適である。
The composition of the present invention is obtained by low temperature firing.
It has a high dielectric constant and very good dielectric loss characteristics in the temperature range below the Curie point. Also, titanium oxide,
By adding an oxide that forms a solid solution to titanium sites represented by zirconium oxide and tin oxide, the maximum value of the dielectric constant can be increased, and it is suitable as a dielectric for capacitors.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の誘電体磁器組成物の誘電損失ー温度特
性を示すグラフ図である。
FIG. 1 is a graph showing dielectric loss-temperature characteristics of a dielectric ceramic composition of the present invention.

【図2】シフターを添加した誘電体磁器組成物の誘電損
失−温度特性を示すグラフ図である。
FIG. 2 is a graph showing dielectric loss-temperature characteristics of a dielectric ceramic composition to which a shifter is added.

【符号の説明】[Explanation of symbols]

1 実施例2 2 実施例5 3 実施例7 4 実施例11 5 比較データ 1 Example 2 2 Example 5 3 Example 7 4 Example 11 5 Comparative data

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 チタン酸バリウム82.5〜99.1モ
ル%、酸化銅0.3〜4モル%、酸化亜鉛0.2〜3.
5モル%、酸化セリウム0.2〜5モル%、及び酸化ジ
ルコニウム、酸化チタン、酸化スズの中から選ばれた少
なくとも1種類以上0.2〜5モル%からなる新規な誘
電体磁器組成物。
1. Barium titanate 82.5-99.1 mol%, copper oxide 0.3-4 mol%, zinc oxide 0.2-3.
A novel dielectric ceramic composition comprising 5 mol%, 0.2 to 5 mol% of cerium oxide, and at least one or more selected from zirconium oxide, titanium oxide, and tin oxide and 0.2 to 5 mol%.
【請求項2】 請求項1記載の誘電体磁器組成物100
モルに対してアルカリ土類金属および鉛のチタン酸塩
(チタン酸バリウムを除く。)、ジルコン酸塩、スズ酸
塩の中から選ばれた1種以上を2.5〜40モル含有さ
せてなる新規な誘電体磁器組成物。
2. The dielectric ceramic composition 100 according to claim 1.
2.5 to 40 mol of at least one selected from alkaline earth metal and lead titanate (excluding barium titanate), zirconate, and stannate is contained with respect to mol. Novel dielectric ceramic composition.
JP4016822A 1992-01-31 1992-01-31 Novel dielectric porcelain composition Withdrawn JPH05213668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4016822A JPH05213668A (en) 1992-01-31 1992-01-31 Novel dielectric porcelain composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4016822A JPH05213668A (en) 1992-01-31 1992-01-31 Novel dielectric porcelain composition

Publications (1)

Publication Number Publication Date
JPH05213668A true JPH05213668A (en) 1993-08-24

Family

ID=11926873

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4016822A Withdrawn JPH05213668A (en) 1992-01-31 1992-01-31 Novel dielectric porcelain composition

Country Status (1)

Country Link
JP (1) JPH05213668A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013086314A (en) * 2011-10-14 2013-05-13 Seiko Epson Corp Liquid injection head and liquid injection device and piezoelectric device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013086314A (en) * 2011-10-14 2013-05-13 Seiko Epson Corp Liquid injection head and liquid injection device and piezoelectric device

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