JPH0566331B2 - - Google Patents
Info
- Publication number
- JPH0566331B2 JPH0566331B2 JP59256110A JP25611084A JPH0566331B2 JP H0566331 B2 JPH0566331 B2 JP H0566331B2 JP 59256110 A JP59256110 A JP 59256110A JP 25611084 A JP25611084 A JP 25611084A JP H0566331 B2 JPH0566331 B2 JP H0566331B2
- Authority
- JP
- Japan
- Prior art keywords
- composition
- dielectric constant
- present
- pbtio
- lead
- 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
- 239000000203 mixture Substances 0.000 claims description 22
- 239000000395 magnesium oxide Substances 0.000 claims description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 10
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 9
- FKSZLDCMQZJMFN-UHFFFAOYSA-N [Mg].[Pb] Chemical compound [Mg].[Pb] FKSZLDCMQZJMFN-UHFFFAOYSA-N 0.000 claims description 2
- 238000010586 diagram Methods 0.000 claims description 2
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 claims description 2
- HEPLMSKRHVKCAQ-UHFFFAOYSA-N lead nickel Chemical compound [Ni].[Pb] HEPLMSKRHVKCAQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims 1
- 239000000919 ceramic Substances 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052573 porcelain Inorganic materials 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910002113 barium titanate Inorganic materials 0.000 description 2
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 2
- 229910000480 nickel oxide Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910003781 PbTiO3 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Capacitors (AREA)
- Inorganic Insulating Materials (AREA)
Description
（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
で焼結でき、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。
（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（BaTiO3）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りである。しかし
ながら、チタン酸バリウム（BaTiO3）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、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、ニツ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。
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。
この要求に答えるために本発明者等は特開昭58
−161972号公報でPb（Ni1/3Nb2/3）O3−Pb（Mg
１／２Ｗ1/2）O3−PbTiO3からなる三成分磁器組成
物を提案した。この特開昭58−161972号公報では
誘電率が3060〜13400、誘電損失が0.1〜3.8％、
20℃における比抵抗が2.0×1012〜1.2×1013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。
（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。
（発明の構成）
本発明は、マグネシウム・タングステン酸鉛
〔〔Pb（Mg1/2Ｗ1/2）O3〕、チタン酸鉛〔PbTiO3〕
およびニツケル・ニオブ酸鉛〔Pb（Ni1/3Nb2/3
O3〕からなる３成分組成物を〔Pb（Mg1/2Ｗ1/2）
O3〕ｘ〔PbTiO3〕ｙ〔Pb（Ni1/3Nb2/3〕O3〕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＝0.06、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。
（実施例）
以下本発明を実施例により詳細に説明する。
出発原料として純度99.9％以上の酸化鉛
（PbO）、酸化マグネシウム（MgO）、酸化タング
ステン（WO3）、酸化チタン（TiO2）、酸化ニツ
ケル（NiO）および酸化ニオブ（Nb2O5）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、口別、乾燥後、有機バインダー
を入れ整粒後プレスし、直径16mm、厚さ約２mm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LCRメーターで周波数1KHz、電
圧1Vr・ｍ・ｓ、温度20℃で容量と誘電損失を測
定し、誘電率を算出した。次に超絶縁抵抗計で
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、誘電損
失、20℃における比抵抗の関係を次表に示す。
(Industrial Application Field) The present invention relates to a ceramic composition, particularly a ceramic 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. (Prior Art) It is well known that ceramics containing barium titanate (BaTiO 3 ) as a main component have been widely put into practical use as dielectric ceramic compositions. However, those whose main component is barium titanate (BaTiO 3 ) have a sintering temperature of usually 1300 to 1400°C. Therefore, when using this material in a multilayer capacitor, a material that can withstand this sintering temperature must be used for the internal electrodes, such as an expensive noble metal such as platinum or palladium, which has the disadvantage of high manufacturing costs. be. In order to make multilayer capacitors cheaply, it is necessary to use inexpensive metals mainly composed of silver, nickel, etc., which can be used for the internal electrodes.
Porcelain that can be sintered at as low a temperature as possible, especially below 1050°C, is needed. Furthermore, the electrical properties of the ceramic composition are basically required to have a high dielectric constant, low dielectric loss, and high insulation resistance. In order to meet this demand, the present inventors have
-Pb(Ni1/3Nb2/3)O 3 -Pb(Mg
A ternary porcelain composition consisting of 1/2W1/2) O3 - PbTiO3 was proposed. In this JP-A-58-161972, the dielectric constant is 3060 to 13400, the dielectric loss is 0.1 to 3.8%,
A composition is disclosed that exhibits excellent properties such as a specific resistance of 2.0×10 12 to 1.2×10 13 at 20°C. However, it has been desired to further increase the dielectric constant while maintaining other properties. (Object of the invention) The object of the present invention is to enable sintering at a low temperature of 1050°C or lower,
An object of the present invention is to provide a ceramic composition for a multilayer capacitor that has a high dielectric constant, low dielectric loss, and high specific resistance. (Structure of the Invention) The present invention provides magnesium lead tungstate [[Pb(Mg1/2W1/2)O 3 ], lead titanate [PbTiO 3 ].
and lead nickel niobate [Pb (Ni1/3Nb2/3
A three -component composition consisting of [Pb (Mg1/2W1/2)
O 3 ] x [PbTiO 3 ] y [Pb (Ni1/3Nb2/3] O 3 ] z
When expressed as (however, x+y+z=1.00)
In this ternary 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 = 0.06, y = 0.24, z = 0.70) Magnesium oxide is added to the main component composition as a subcomponent on the line connecting these 5 points and within the composition range surrounded by these five points. (MgO) is added in an amount of 0.05 to 2.0% by weight. (Examples) The present invention will be explained in detail below using examples. Lead oxide (PbO), magnesium oxide (MgO), tungsten oxide (WO 3 ), titanium oxide (TiO 2 ), nickel oxide (NiO), and niobium oxide (Nb 2 O 5 ) with a purity of 99.9% or higher are used as starting materials. and weigh each so that the mixing ratio shown in the table is obtained. Next, the weighed materials were wet-mixed in a ball mill and pre-baked at 750-800°C. This powder was ground in a ball mill, separated, dried, and an organic binder was added, sized and pressed. Four disks with a thickness of about 2 mm were created. 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 baked on the top and bottom surfaces of four sintered disks at 600℃, and the capacitance and dielectric loss were measured using a digital LCR meter at a frequency of 1KHz, a voltage of 1Vr・m・s, and a temperature of 20℃, and the dielectric constant was calculated. . Next, use a super insulation resistance meter
Apply a voltage of 50V for 1 minute to measure the insulation resistance at a temperature of 20
It was measured at ℃ and the specific resistance was calculated. The characteristics corresponding to each composition were determined from the average value of four samples. The relationship between the compounding ratio, dielectric constant, dielectric loss, and resistivity at 20°C of the porcelain thus obtained is shown in the following table.
【表】【table】
【表】
表に示した結果から明らかなようにPb（Mg1/2
Ｗ1/2）O3−PbTiO3−Pb（Ni1/3Nb2/3）O3三成
分組成物に副成分であるMgOを主成分に対して
0.05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な水準
に保持しながら誘電率を高めており、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。
なお本発明の主成分組成範囲外では焼結温度が
高くなつたり、誘電率が低下するため前述の様に
限定される。また副成分が0.05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。
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。
（発明の効果）
本発明の磁器組成物はPb（Mg1/2Ｗ1/2）O3−
PbTiO3−Pb（Ni1/3nb2/3）O3からなる主成分
に、副成分としてMgOを0.05重量％ないし2.0重
量％添加することにより、誘電率を高めることが
できる。[Table] As is clear from the results shown in the table, Pb (Mg1/2
W1/2) O 3 −PbTiO 3 −Pb(Ni1/3Nb2/3)O 3 ternary composition with MgO as a subcomponent against the main component.
The present invention, which contains 0.05% to 2.0% by weight, increases the dielectric constant while maintaining dielectric loss and resistivity at good and practical levels, and provides an excellent material as a ceramic composition for multilayer capacitors. It is something. It should be noted that outside the main component composition range of the present invention, the sintering temperature increases and the dielectric constant decreases, so the limitations are as described above. In addition, the subcomponents are less than 0.05% by weight and
If it exceeds 2.0% by weight, the effect of improving the dielectric constant will be small. 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. (Effect of the invention) The porcelain composition of the present invention has Pb(Mg1/2W1/2)O 3 −
The dielectric constant can be increased by adding 0.05% to 2.0% by weight of MgO as a subcomponent to the main component consisting of PbTiO 3 -Pb(Ni1/3nb2/3)O 3 .
Claims (1)
１／２Ｗ1/2）O3〕、チタン酸鉛〔PbTiO3〕および
ニツケル・ニオブ酸鉛〔Pb（Ni1/3Nb2/3）O3〕
からなる３成分組成物を〔Pb（Mg1/2Ｗ1/2）O3〕
ｘ〔PbTiO3〕ｙ〔Pb（Ni1/3Nb2/3）O3〕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＝0.06、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] 1 Magnesium lead tungstate [Pb (Mg
1/2W1/2)O 3 ], lead titanate [PbTiO 3 ] and lead nickel niobate [Pb(Ni1/3Nb2/3)O 3 ]
A three-component composition consisting of [Pb(Mg1/2W1/2)O 3 ]
When expressed as x[PbTiO 3 ]y[Pb(Ni1/3Nb2/3)O 3 ]z (however, x+y+z=1.00), these 3
In the 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 = 0.06, y = 0.24, z = 0.70) and in the composition range surrounded by these five points, magnesium oxide (MgO ) in an amount of 0.05% to 2.0% 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 JPS61136952A (en) | 1986-06-24 |
| JPH0566331B2 true 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) |
Families Citing this family (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61136952A (en) | 1986-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |