JPS61136952A - Ceramic composition - Google Patents
Ceramic compositionInfo
- Publication number
- JPS61136952A JPS61136952A JP59256110A JP25611084A JPS61136952A JP S61136952 A JPS61136952 A JP S61136952A JP 59256110 A JP59256110 A JP 59256110A JP 25611084 A JP25611084 A JP 25611084A JP S61136952 A JPS61136952 A JP S61136952A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- weight
- dielectric constant
- lead
- present
- 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
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- Compositions Of Oxide Ceramics (AREA)
- Ceramic Capacitors (AREA)
- Inorganic Insulating Materials (AREA)
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】
（産業上の利用分野）
本発明は、磁器組成物、特に１０５０℃以下の低温で焼
結で亀、誘電率が高く、室温における絶縁抵抗が高い磁
器組成物に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a porcelain composition, particularly a porcelain composition that can be sintered at a low temperature of 1050°C or lower, has a high dielectric constant, and has a high insulation resistance at room temperature. It is.
（従来技術）
従来、誘電体磁器組成物として、チタン酸バリウム（Ｂ
ａＴｌＯｓ ）を主成分とする磁器が広く実用化されて
いることは周知のとおシである。しかしながら、チタン
酸バリウム（ＢａＴｉＯｓ ）を主成分とするものは、
焼結温度が通常１３００〜１４００℃の高温である。こ
のためこれを積層形コンデンサに利用する場合には内部
電極としてこの焼結温度に耐え得る材料、例えば白金ｔ
パラジウムなどの高価な貴金属を使用しなければならず
、製造コストが高くつくという欠点がある。積層形コン
デンサを安く作るためには、銀ｐニッケルなどを主成分
とする安価な金属が内部電極に使用できるような、でき
るだけ低温、特に１０５０℃以下で焼結できる磁器が必
要である。(Prior Art) Conventionally, barium titanate (B
It is well known that porcelain containing aTlOs as its main component has been widely put into practical use. However, those whose main component is barium titanate (BaTiOs),
The sintering temperature is usually a high temperature of 1300 to 1400°C. Therefore, when using this material in a multilayer capacitor, it is necessary to use a material that can withstand this sintering temperature for the internal electrode, such as platinum t.
The drawback is that expensive precious metals such as palladium must be used, resulting in high manufacturing costs. In order to manufacture multilayer capacitors at low cost, it is necessary to use porcelain that can be sintered at as low a temperature as possible, particularly at 1050° C. or lower, so that inexpensive metals such as silver-p-nickel can be used for the internal electrodes.
また磁器組成物の電気的特性として、誘電率が高く、誘
電損失が小さく、絶縁抵抗が高いことが基本的に要求さ
れる。Furthermore, the electrical properties of the ceramic composition are basically required to have a high dielectric constant, low dielectric loss, and high insulation resistance.
この要求に答えるために本発明者等は特開昭５８−１６
１９７２号公報でＰｂ（Ｎｉ １／３Ｎｂ２／３）Ｏ，
−Ｐｂ（Ｍｇ１／２Ｗ１／２）Ｏ，−ＰｂＴｌＯｓから
なる三成分磁器組成物を提案した。この特開昭５８−１
６１９７２号公報では誘電率が３０６０〜１３４００、
誘電損失が０．１〜３．８チ、２０℃における比抵抗が
２．０×１０１！〜１．２Ｘ１０”という優れた特性を
示す組成物が開示されている。しかしながら他の特性を
保持しながら更に誘電率を高めることが望まれていた。In order to meet this demand, the inventors of the present invention
In the 1972 publication, Pb(Ni 1/3Nb2/3)O,
A three-component porcelain composition consisting of -Pb(Mg1/2W1/2)O, -PbTlOs was proposed. This JP-A-58-1
In Publication No. 61972, the dielectric constant is 3060 to 13400,
The dielectric loss is 0.1 to 3.8 inches, and the specific resistance at 20°C is 2.0 x 101! Compositions have been disclosed that exhibit excellent properties of ˜1.2×10”. However, it has been desired to further increase the dielectric constant while retaining other properties.
（発明の目的）
本発明の目的は１０５０℃以下の低温で焼結でき、誘電
率が高く、誘電損失の小さいかつ比抵抗の高い積層コン
デンサ用磁器組成物を提供することにある。(Objective of the Invention) An object of the present invention is to provide a ceramic composition for a multilayer capacitor that can be sintered at a low temperature of 1050° C. or lower, has a high dielectric constant, low dielectric loss, and high specific resistance.
（発明の構成）
本発明は、マグネシウム・タングステン酸鉛〔Ｐｂ（Ｍ
ｇ１／２Ｗ１／２）０． ） −チタン酸鉛〔ＰｂＴ１
０ｇ）およびニッケル・ニオブ酸鉛（ｐｂ（Ｎ目／３Ｎ
ｂ２／３）Ｏｓ）からなる３成分組成物を、〔Ｐｂ（Ｍ
ｇ １／２ Ｗ１／２） Ｏ３） ｘ 〔ＰｂＴ１０ｇ
） ｙ 〔Ｐｂ（Ｎｉ １／３Ｎｂ２／ ３）０、〕
ｚと表わしたときに（ただし、ｘ ＋ ｙ ＋ ｚ ＝
１．００）この３成分組成図において、以下の組成点
（ｘ＝０．６９３リ ｙ−０，２９７ｔ ｚ士０．０
１）（Ｘ謬０．４９５ｙ ｙ−０，４９５−ｚ−０−
０１）（ｘｗＯ，１９５ｐ ｙ−０，４５５ｅ ｚ
−０，３５）（ｘｗＯ，１０ｔ ｙｍｏ、４０ ｔ
ｚＭｏ、５０）（ｘｗｏ、０６ ｔ ｙ＝０．
２４ ｐ ｘｗＯ，７０）を結ぶ線上およびこの５
点に囲まれる組成範囲にある主成分組成物に副成分とし
て酸化マグネシウム（ＭｇＯ）を０．０５重量ないし２
．０重量％添加含有せしめることを特徴とする。(Structure of the Invention) The present invention provides magnesium lead tungstate [Pb(M
g1/2W1/2)0. ) -Lead titanate [PbT1
0g) and nickel lead niobate (pb (N/3N)
A three-component composition consisting of [Pb(M
g 1/2 W1/2) O3) x [PbT10g
) y [Pb(Ni 1/3Nb2/3)0,]
When expressed as z (however, x + y + z =
1.00) In this three-component composition diagram, the following composition points (x = 0.693 y - 0,297t z 0.0
1) (X error 0.495y y-0,495-z-0-
01) (xwO,195p y-0,455e z
−0,35)(xwO,10t ymo,40t
zMo, 50) (xwo, 06 t y=0.
24 p xwO, 70) and this 5
Magnesium oxide (MgO) is added as a subcomponent to the main component composition in the composition range surrounded by the dots by weight of 0.05% to 2%.
．． It is characterized in that it is added in an amount of 0% by weight.
（実施例） 以下本発明を実施例によシ詳細に説明する。(Example) The present invention will be explained in detail below using examples.
出発原料として純度９９．９％以上の酸化鉛〔ＰｂＯ）
。Lead oxide [PbO] with a purity of 99.9% or more as a starting material
.
酸化マグネシウム（ＭｇＯ）ａ化タングステン（ＷＯ，
）を酸化チタン（ＴｌＯ，）ｊ酸化ニッケル（ＮＩＯ）
および酸化ニオブ（ＮｂｘＯｍ）を使用し、表に示した
配合比となるように各々秤量する。次に今秤量各材料を
ボールミル中で湿式混合した後７５０〜８００℃で予焼
を行ない、この粉末をボールミルで粉砕し、日別、乾燥
後、有機バインダーを入れ整粒後プレスし、直径１６露
、厚さ約２腸の円板４枚を作成した。次に本発明の組成
範囲の試料は空気中９００〜１０５０℃の温度で１時間
焼結した。焼結した円板４枚の上下面に銀電極を６００
℃で焼付け、デジタルＩ、ＣＢメーターで周波数Ｉ Ｋ
Ｈｚ −電圧１ｖｒ−ｍ・３ｇ温度２０℃で容量と誘電
損失を測定し、誘電率を算出した。次に層絶縁抵抗計で
５０Ｖの電圧を１分間印加して、絶縁抵抗を温度２０℃
で測定し、比抵抗を算出した。各組成に対応する特性は
試料４点の平均値より求めた。゛このようにして得られ
た磁器の配合比と誘電率ｐ誘電損失２２０℃における比
抵抗の関係を次表に示す。Magnesium oxide (MgO) Tungsten a-oxide (WO,
) titanium oxide (TlO, )j nickel oxide (NIO)
and niobium oxide (NbxOm) are weighed so that the mixing ratio shown in the table is achieved. Next, the weighed materials were wet-mixed in a ball mill, pre-baked at 750-800°C, and this powder was ground in a ball mill. After drying, an organic binder was added and the particles were sized and pressed. Four discs each having a thickness of about 2 intestines were prepared. Samples having the composition range of the present invention were then sintered in air at a temperature of 900-1050°C for 1 hour. Silver electrodes were placed on the top and bottom surfaces of four sintered disks.
Baked at ℃, digital I, frequency I K with CB meter
The capacitance and dielectric loss were measured at Hz-voltage 1vr-m/3g and temperature 20°C, and the dielectric constant was calculated. Next, apply a voltage of 50V for 1 minute using a layer insulation resistance meter to measure the insulation resistance at a temperature of 20°C.
The specific resistance was calculated. The characteristics corresponding to each composition were determined from the average value of four samples. The following table shows the relationship between the compounding ratio of the porcelain thus obtained and the dielectric constant p dielectric loss and specific resistance at 220°C.
表に示した結果から明らかなようにＰｂ（Ｍｇ１／２Ｗ
１／２） Ｏ，−ＰｂＴｉＯ，−Ｐｂ（Ｎ目／３Ｎｂ２
／３）Ｏｓ三成分組成物に副成分であるＭｇＯを主成分
に対してＯ，ＯＳ重量％ないし２．０重量％添加含有せ
しめた本発明は誘電損失や比抵抗を良好かつ実用的外水
準に保持しながら誘電率を高めておシ、積層コンデンサ
用磁器組成物として優れた材料を提供するものである。As is clear from the results shown in the table, Pb(Mg1/2W
1/2) O, -PbTiO, -Pb (Nth/3Nb2
/3) The present invention, in which the Os three-component composition contains MgO as a subcomponent in an amount of 2.0% by weight of O and OS relative to the main component, has good dielectric loss and specific resistance, and is at a level that is beyond practical level. The present invention provides an excellent material for use as a ceramic composition for multilayer capacitors by increasing the dielectric constant while maintaining the same properties.
なお本発明の主成分組成範囲外では焼結温度が高くなっ
たり、誘電率が低下するため前述の様に限定される。ｔ
た副成分がＯ，ＯＳ重量−未満および２．０重量−を越
えるものは誘電率の改善効果が小さくなる。It should be noted that outside the main component composition range of the present invention, the sintering temperature becomes high and the dielectric constant decreases, so it is limited as described above. t
If the amount of the subcomponent is less than 0.0% by weight or more than 2.0% by weight, the effect of improving the dielectric constant will be small.
本発明では副成分として酸化マグネシウム（ＭｇＯ）を
使用しているが、高温で容易に分解し酸化物を形成する
マグネシウムの炭酸塩や水酸化物などを使用してもよい
。Although magnesium oxide (MgO) is used as a subcomponent in the present invention, magnesium carbonate or hydroxide, which easily decomposes at high temperatures to form oxides, may also be used.
（発明の効果）(Effect of the invention)
Claims (1)
１／２）Ｏ＿３〕、チタン酸鉛〔ＰｂＴｉＯ＿３〕およ
びニッケル・ニオブ酸鉛〔Ｐｂ（Ｎｉ１／３Ｎｂ２／３
）Ｏ＿３〕からなる３成分組成物を〔Ｐｂ（Ｍｇ１／２
Ｗ１／２）Ｏ＿３〕ｘ〔ＰｂＴｉＯ＿３〕ｙ〔Ｐｂ（Ｎ
ｉ１／３Ｎｂ２／３）Ｏ＿３〕ｚと表わしたときに（た
だしｘ＋ｙ＋ｚ＝１．００）この３成分組成図において
、以下の組成点 （ｘ＝０．６９３、ｙ＝０．２９７、ｚ＝０．０１）（
ｘ＝０．４９５、ｙ＝０．４９５、ｚ＝０．０１）（ｘ
＝０．１９５、ｙ＝０．４５５、ｚ＝０．３５）（ｘ＝
０．１０、ｙ＝０．４０、ｚ＝０．５０）（ｘ＝０．０
６、ｙ＝０．２４、ｚ＝０．７０）を結ぶ線上およびこ
の５点に囲まれる組成範囲にある主成分組成物に副成分
として酸化マグネシウム（ＭｇＯ）を０．０５重量％な
いし２．０重量％添加含有せしめることを特徴とする磁
器組成物。[Claims] Magnesium lead tungstate [pb (Mg1/2W
1/2) O_3], lead titanate [PbTiO_3] and lead nickel niobate [Pb(Ni1/3Nb2/3)
)O_3], a three-component composition consisting of [Pb(Mg1/2
W1/2)O_3]x[PbTiO_3]y[Pb(N
i1/3Nb2/3)O_3]z (where x+y+z=1.00) In this three-component composition diagram, the following composition points (x=0.693, y=0.297, z=0. 01)(
x=0.495, y=0.495, z=0.01) (x
=0.195, y=0.455, z=0.35) (x=
0.10, y=0.40, z=0.50) (x=0.0
6, y = 0.24, z = 0.70) and the composition range surrounded by these 5 points, magnesium oxide (MgO) is added as a subcomponent from 0.05% by weight to 2% by weight. A porcelain composition characterized in that it contains 0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59256110A JPS61136952A (en) | 1984-12-04 | 1984-12-04 | Ceramic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59256110A JPS61136952A (en) | 1984-12-04 | 1984-12-04 | Ceramic composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61136952A true JPS61136952A (en) | 1986-06-24 |
| JPH0566331B2 JPH0566331B2 (en) | 1993-09-21 |
Family
ID=17288030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59256110A Granted JPS61136952A (en) | 1984-12-04 | 1984-12-04 | Ceramic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61136952A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0292856A (en) * | 1988-09-30 | 1990-04-03 | Nec Corp | Production of porcelain composition |
-
1984
- 1984-12-04 JP JP59256110A patent/JPS61136952A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0292856A (en) * | 1988-09-30 | 1990-04-03 | Nec Corp | Production of porcelain composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0566331B2 (en) | 1993-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |