JP2568566B2 - Dielectric porcelain composition - Google Patents
Dielectric porcelain compositionInfo
- Publication number
- JP2568566B2 JP2568566B2 JP62182540A JP18254087A JP2568566B2 JP 2568566 B2 JP2568566 B2 JP 2568566B2 JP 62182540 A JP62182540 A JP 62182540A JP 18254087 A JP18254087 A JP 18254087A JP 2568566 B2 JP2568566 B2 JP 2568566B2
- Authority
- JP
- Japan
- Prior art keywords
- composition
- dielectric
- tio
- main component
- 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
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Capacitors (AREA)
- Inorganic Insulating Materials (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は誘電率が高く温度係数が小さく良好度Ｑにす
ぐれかつ絶縁抵抗の高い誘電体磁器組成物に関するもの
である。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric porcelain composition having a high dielectric constant, a small temperature coefficient, excellent quality Q, and a high insulation resistance.
従来の技術 従来から温度係数の小さい誘電体がコンデンサ用素子
として要求され誘電体磁器組成物として下記のような系
が知られている。2. Description of the Related Art Conventionally, a dielectric having a small temperature coefficient has been required as an element for a capacitor, and the following system has been known as a dielectric ceramic composition.
・MgO−TiO2−CoO系 ・La2O3−2TiO2−CaTiO3−2MgO−TiO2系 ・TiO2−BaTiO3−Bi2O3−La2O3系 ・SrZrO3−SrO−Nb2O5−CaTiO3系 発明が解決しようとする問題点 しかし、これらの組成は誘電率が低く、またSrZrO3−
SrO−Nb2O5−CaTiO3系は良好度Ｑも悪い。さらにBi2O3
を含んでいるものは、積層セラミックコンデンサの内部
電極としてPdを用いることができないという問題があっ
た。・ MgO-TiO 2 -CoO system ・ La 2 O 3 -2TiO 2 -CaTiO 3 -2MgO-TiO 2 system ・ TiO 2 -BaTiO 3 -Bi 2 O 3 -La 2 O 3 system ・ SrZrO 3 -SrO-Nb 2 O 5 -CaTiO 3 system invention is the problem to be solved, however, these compositions have low dielectric constant, also SrZrO 3 -
The SrO—Nb 2 O 5 —CaTiO 3 system also has poor Q. Further Bi 2 O 3
However, there is a problem that Pd cannot be used as the internal electrode of the multilayer ceramic capacitor.
本発明はこのような問題点を解決するもので、誘電率
が高く温度係数が小さく良好度Ｑにすぐれかつ絶縁抵抗
が高い誘電体磁器を得ることを目的とするものである。An object of the present invention is to solve such a problem, and an object of the present invention is to provide a dielectric ceramic having a high dielectric constant, a small temperature coefficient, excellent quality Q, and a high insulation resistance.
問題点を解決するための手段 この問題点を解決するために本発明は、一般式 xBaO−ｙ〔（TiO2）1-m（SnO2）ｍ〕−zPr2O11/3 と表わした時、x,y,zが以下に表わす各点a,b,c,dで囲ま
れるモル比の範囲にある組成物を主成分としたことを特
徴とする誘電体磁器組成物である。Means for Solving the Problems In order to solve this problem, the present invention provides a compound of the general formula xBaO-y [(TiO 2 ) 1-m (SnO 2 ) m ] -zPr 2 O 11/3 When represented, x, y, z is a dielectric porcelain composition characterized by being mainly composed of a composition in the range of the molar ratio surrounded by each point a, b, c, d shown below is there.
図は本発明にかかる組成物の主成分の組成範囲を示す
三角図であり、主成分の組成範囲を限定した理由を図に
参照しながら説明する。まず、Ａ領域では焼結困難とな
り誘電率，良好度Q,絶縁抵抗が低下する。また、Ｂ領域
では温度係数が−側に大きくなり過ぎて、実用的でなく
なる。さらに、Ｃ領域では温度係数が＋側に大きくなり
誘電率も小さい。そして、Ｄ領域では焼結が困難とな
り、誘電率，良好度Q,絶縁抵抗が低下する。また、Ｏ＜
ｍ≦0.25の範囲ではｍを大きくすると温度係数は＋側に
移行し、焼成温度を低下させ適当な組成を選ぶことによ
り、温度係数が良好で誘電率が大きく焼成温度の低い組
成が得られる。しかし、ｍが0.25を越えると誘電率，良
好度Ｑが低下する。 The figure is a triangular diagram showing the composition range of the main components of the composition according to the present invention, and the reason for limiting the composition range of the main components will be described with reference to the drawings. First, in the region A, sintering becomes difficult, and the dielectric constant, the quality factor Q, and the insulation resistance decrease. In the region B, the temperature coefficient becomes too large on the negative side, which is not practical. Further, in the C region, the temperature coefficient increases to the + side, and the dielectric constant is small. In the region D, sintering becomes difficult, and the dielectric constant, the degree of goodness Q, and the insulation resistance decrease. Also, O <
When m is increased in the range of m ≦ 0.25, the temperature coefficient shifts to the + side, and a composition having a good temperature coefficient, a large dielectric constant and a low firing temperature can be obtained by lowering the firing temperature and selecting an appropriate composition. However, when m exceeds 0.25, the dielectric constant and the goodness Q decrease.
本発明はさらに、上記主成分に対し、マンガン，クロ
ム，鉄，ニッケル，コバルト及びケイ素の酸化物からな
る群の中から選ばれた少なくとも１種を、それぞれMn
O2,Cr2O3,FeO,NiO,CoO,及びSiO2に換算して、上記主成
分の0.05〜1.00重量％添加せしめた構成としたものであ
る。これらの添加物は磁器の焼結性を向上する効果を有
し、その添加量が0.05重量％未満では添加効果はなく、
1.00重量％を越えると誘電率が低下し実用的でなくな
る。The present invention further provides at least one selected from the group consisting of oxides of manganese, chromium, iron, nickel, cobalt and silicon with respect to the main component,
The composition is such that 0.05 to 1.00% by weight of the above main component is added in terms of O 2 , Cr 2 O 3 , FeO, NiO, CoO, and SiO 2 . These additives have the effect of improving the sinterability of the porcelain.
If it exceeds 1.00% by weight, the dielectric constant is lowered and it is not practical.
作 用 本発明の誘電体磁器組成物により、誘電率が高く温度
係数が小さく良好度Ｑにすぐれかつ絶縁抵抗が高い誘電
体磁器を得ることができる。The dielectric porcelain composition of the present invention can provide a dielectric porcelain having a high dielectric constant, a small temperature coefficient, excellent quality Q, and a high insulation resistance.
実施例 以下に本発明を具体的実施例により説明する。EXAMPLES Hereinafter, the present invention will be described with reference to specific examples.
（実施例１） 出発原料には化学的に高純度のBaCO3,TiO2,SnO2及びP
r6O11粉末を下記の第１表に示す組成になるように秤量
し、めのうボールを備えたゴム内張りしたボールミルに
純水とともに入れ、湿式混合後脱水乾燥した。この乾燥
粉末を高アルミナ質のルツボに入れ、1100℃で２時間仮
焼した。この仮焼粉末をめのうボールを備えたゴム内張
りしたボールミルに純水とともに入れ湿式粉砕した。こ
の粉砕物を脱水乾燥した後、粉末にバインダーとして濃
度５％のポリビニールアルコール溶液を９重量％添加し
て均質とした後、32メッシュのふるいを通して整粒し
た。その後、この整粒粉体を金型と油圧プレスを用いて
成形圧力1ton/cm2で直径15mm、厚み0.4mmに成形し成形
物をジルコニア厘鉢中に入れ、空気中において下記の第
１表に示す温度で２時間焼成し第１表に示す配合組成の
誘電体磁器を得た。(Example 1) As starting materials, chemically pure BaCO 3 , TiO 2 , SnO 2 and P
The r 6 O 11 powder was weighed so as to have the composition shown in Table 1 below, put into a rubber-lined ball mill equipped with an agate ball together with pure water, wet-mixed, and dehydrated and dried. The dried powder was placed in a high alumina crucible and calcined at 1100 ° C. for 2 hours. The calcined powder was put together with pure water in a rubber-lined ball mill equipped with an agate ball and wet-pulverized. This pulverized product was dehydrated and dried, and a 9% by weight polyvinyl alcohol solution having a concentration of 5% was added as a binder to the powder, and the mixture was homogenized, and then sized through a 32 mesh sieve. Thereafter, the sized powder was molded into a 15 mm diameter and 0.4 mm thick at a molding pressure of 1 ton / cm 2 using a mold and a hydraulic press, and the molded product was placed in a zirconia bowl. Was fired at the temperature shown in Table 2 for 2 hours to obtain a dielectric ceramic having the composition shown in Table 1.
これらの試料の電気特性は、試料の両面に銀電極を焼
き付け、誘電率，良好度Q,温度係数は横河・ヒューレッ
ト・パッカード株式会社製デジタルLCRメータのモデル4
275Aを使用し、測定温度25℃，測定電圧1.0Vrms,測定周
波数1MHzによる測定より求めた。なお、温度係数は25℃
における容量値を基準とし、次式により求めた。The electrical characteristics of these samples were determined by burning silver electrodes on both sides of the sample and measuring the dielectric constant, goodness Q, and temperature coefficient of a digital LCR meter model 4 manufactured by Yokogawa-Hewlett-Packard Co., Ltd.
Using a 275A, measured at a measurement temperature of 25 ° C, a measurement voltage of 1.0 Vrms, and a measurement frequency of 1 MHz. The temperature coefficient is 25 ° C
Was determined by the following equation based on the capacitance value at.
温度係数（ppm/℃） ＝〔（Ｃ85℃−Ｃ25℃）／（Ｃ25℃×60）〕×106 また、絶縁抵抗は横河・ヒューレット・パッカード株
式会社製HRメータのモデル4329Aを使用し、測定電圧D.
C.50V,測定時間１分間による測定より求めた。試験結果
を第１表に併せて示した。Temperature coefficient (ppm / ℃) = [(C 85 ℃ -C 25 ℃) / (C 25 ℃ × 60) ] × 10 6 Further, the insulation resistance is a model 4329A of HR meter manufactured by Yokogawa-Hewlett-Packard Co. Use and measure voltage D.
C. It was determined from the measurement at 50 V for a measurement time of 1 minute. The test results are also shown in Table 1.
（実施例２） 出発原料には化学的に高純度のBaCO3,TiO2,SnO2,Pr6O
11,MnO2,Cr2O3,FeO,NiO,CoO及びSiO2粉末を下記の第２
表に示す組成になるように秤量し、それ以後は上記実施
例１の場合と同様に処理して第２表に示す配合組成の誘
電体磁器を得た。 (Example 2) As starting materials, chemically pure BaCO 3 , TiO 2 , SnO 2 , Pr 6 O
11 , MnO 2 , Cr 2 O 3 , FeO, NiO, CoO, and SiO 2 powder
It was weighed so as to have the composition shown in the table, and thereafter processed in the same manner as in Example 1 to obtain a dielectric ceramic having the composition shown in Table 2.
これらの試料の試験方法は実施例１と同一であり、試
験結果を第２表に併せて示す。The test method for these samples is the same as in Example 1, and the test results are shown in Table 2.
発明の効果 以上のように本発明によれば誘電率が高く温度係数が
小さく良好度Ｑにすぐれかつ絶縁抵抗の高い誘電体磁器
が得られる。また、マンガン，クロム，鉄，ニッケル，
コバルト及びケイ素の酸化物の添加により、焼成温度を
低下させることができる。 As described above, according to the present invention, it is possible to obtain a dielectric ceramic having a high dielectric constant, a small temperature coefficient, an excellent quality factor Q, and a high insulation resistance. Also, manganese, chromium, iron, nickel,
The firing temperature can be lowered by the addition of oxides of cobalt and silicon.
さらに、得られた誘電体磁器は高誘電率であるため、
素体をきわめて小形にすることができ、回路の微小化に
有効であり、特に薄層状にして積層セラミックコンデン
サ，ハイブリット微小回路などの用途に適している。Furthermore, since the obtained dielectric porcelain has a high dielectric constant,
The element body can be made extremely small and is effective for miniaturization of circuits, and is particularly suitable for applications such as laminated ceramic capacitors and hybrid microcircuits in the form of thin layers.
図は本発明にかかる主成分の組成範囲を示す三角図であ
る。The figure is a triangular diagram showing the composition range of the main component according to the present invention.
Claims (2)
れるモル比の範囲にある組成物を主成分としたことを特
徴とする誘電体磁器組成物。 1. The general formula xBaO-y [(TiO 2 ) 1-m (SnO 2 ) m ] -zPr 2 O 11/3 A dielectric ceramic composition characterized in that x, y and z are represented by the following points a, b, c and d, and the composition is in a molar ratio range as a main component.
れるモル比の範囲にある組成物を主成分とし、マンガ
ン，クロム，鉄，ニッケル，コバルト及びケイ素の酸化
物からなる群の中から選ばれた少なくとも１種を、それ
ぞれMnO2,Cr2O3,FeO,NiO,CoO及びSiO2に換算して上記主
成分の0.05乃至1.00重量％添加含有したことを特徴とす
る誘電体磁器組成物。 2. The formula xBaO-y [(TiO 2 ) 1-m (SnO 2 ) m ] -zPr 2 O 11/3 When the main component is a composition in which x, y, and z are in the range of the molar ratio surrounded by the following points a, b, c, and d, manganese, chromium, iron, nickel, cobalt, and silicon At least one selected from the group consisting of oxides of the following is converted to MnO 2 , Cr 2 O 3 , FeO, NiO, CoO and SiO 2 , and 0.05 to 1.00% by weight of the above main component is added and contained. A dielectric porcelain composition comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62182540A JP2568566B2 (en) | 1987-07-22 | 1987-07-22 | Dielectric porcelain composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62182540A JP2568566B2 (en) | 1987-07-22 | 1987-07-22 | Dielectric porcelain composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6427107A JPS6427107A (en) | 1989-01-30 |
| JP2568566B2 true JP2568566B2 (en) | 1997-01-08 |
Family
ID=16120078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62182540A Expired - Lifetime JP2568566B2 (en) | 1987-07-22 | 1987-07-22 | Dielectric porcelain composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2568566B2 (en) |
-
1987
- 1987-07-22 JP JP62182540A patent/JP2568566B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6427107A (en) | 1989-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2568567B2 (en) | Dielectric porcelain composition | |
| JP3143922B2 (en) | Non-reducing dielectric ceramic composition | |
| JP2568566B2 (en) | Dielectric porcelain composition | |
| JP2568565B2 (en) | Dielectric porcelain composition | |
| JP2615636B2 (en) | Dielectric porcelain composition | |
| JP3620314B2 (en) | Dielectric ceramic composition and multilayer ceramic capacitor using the same | |
| JP2676778B2 (en) | Dielectric porcelain composition | |
| JPH04188506A (en) | Dielectric porcelain composition | |
| JP3064518B2 (en) | Dielectric porcelain composition | |
| JPH0815010B2 (en) | Dielectric porcelain composition | |
| JP3575294B2 (en) | Dielectric ceramic composition and multilayer ceramic capacitor using the same | |
| JPH07211140A (en) | Dielectric ceramic composition | |
| JPS62243207A (en) | Dielectric porcelain compound | |
| JP3575299B2 (en) | Dielectric ceramic composition and multilayer ceramic capacitor using the same | |
| JP3575298B2 (en) | Dielectric ceramic composition and multilayer ceramic capacitor using the same | |
| JPH05266711A (en) | Dielectric ceramic composition | |
| JPH0587006B2 (en) | ||
| JPH02242516A (en) | Dielectric porcelain composition | |
| JPS62243208A (en) | Dielectric porcelain compound | |
| JPH0821258B2 (en) | Dielectric porcelain composition | |
| JP3024768B2 (en) | Dielectric porcelain composition | |
| JP3106371B2 (en) | Dielectric porcelain composition | |
| JPH02242517A (en) | Dielectric porcelain composition | |
| JPH0329208A (en) | Dielectric ceramic composition | |
| JPH02242523A (en) | Dielectric porcelain composition |