JPH0565463B1 - - Google Patents
Info
- Publication number
- JPH0565463B1 JPH0565463B1 JP59033480A JP3348084A JPH0565463B1 JP H0565463 B1 JPH0565463 B1 JP H0565463B1 JP 59033480 A JP59033480 A JP 59033480A JP 3348084 A JP3348084 A JP 3348084A JP H0565463 B1 JPH0565463 B1 JP H0565463B1
- Authority
- JP
- Japan
- Prior art keywords
- sintered
- dielectric constant
- pbtio
- 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.)
- Pending
Links
- 239000000203 mixture Substances 0.000 claims description 9
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 claims description 3
- 229910052573 porcelain Inorganic materials 0.000 claims description 3
- PYPDMIQMPWEFHX-UHFFFAOYSA-N [Pb].[Co] Chemical compound [Pb].[Co] PYPDMIQMPWEFHX-UHFFFAOYSA-N 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 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
- 239000003990 capacitor Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 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
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 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)
- Inorganic Insulating Materials (AREA)
Description
（産業上の利用分野）
本発明は磁器組成物、特に1000℃以下の低温で
焼結できる誘電率の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）を主成分とするものが広く実用
化されていることは周知の通りである。
しかしながら、BaTiO3を主成分とするもの
は、焼結温度が1300〜1400℃の高温であり、これ
を積層形コンデンサに利用するには内部電極とし
てこの焼結温度に耐える材料、例えば白金やパラ
ジウムなどの高価な貴金属を使用しなければなら
なず、製造コストが高いという欠点があつた。こ
のため銀やニツケルなどを主成分とする安価な金
属が使用可能とするためには、磁器の焼結温度を
できるだけ低くすることが望まれていた。
このため既に、Pb（Fe2/3Ｗ1/3）O3−Pb（Fe1/
２Nb1/2）O3（特公昭55−34962）や（Sr・Pb）
TiO3−Pb（Mg1/2Ｗ1/2）O3（特開昭52−21699）
などの多くの提案がある。
（発明の目的）
本発明の磁器組成物は1000℃以下の低温で焼結
でき、誘電率が高く、誘導損失が良好な特性を示
す優れた材料提供することを目的とする。
（発明の構成）
本発明の磁器組成物はこれらと異なり、コバル
ト・タングステン酸鉛〔Pb（Co1/2Ｗ1/2）O3〕
とチタン酸鉛〔PbTiO3〕からなる２成分組成物
を〔Pb（Co1/2Ｗ1/2）O3〕x〔PbTiO3〕1-xと表現
した時に、ｘが0.35≦ｘ≦0.75の範囲にあること
を特徴とする。
以下本発明を実施例にて詳細に説明する。
（実施例）
出発原料として純度99％以上の酸化鉛（PbO），
炭酸コバルト（CoCO3），酸化タングステン
（WO3）および酸化チタン（TiO2）を使用し、所
定の配合比に秤量する。次にボールミル中で湿式
混合したのち750〜775℃で予焼した。その後ボー
ルミルで粉砕し、別、乾燥後、有機バインダー
を入れ整粒し、0.7ton／cm2でプレスした。直径16
mm，厚さ約２mmの円板を４枚作成した。次に空気
中で900〜980℃で１時間焼結した。焼結した円板
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1Vrmsで容量
と誘電損失（tanδ）を測定し、誘電率を算出し
た。４個の試料の平均値を代表とした。このよう
にして得られた配合比Ｘと特性の関係を次表に示
す。
(Industrial Application Field) The present invention relates to a ceramic composition, particularly a ceramic composition with a high dielectric constant that can be sintered at a low temperature of 1000° C. or lower. (Prior Art) It is well known that dielectric ceramic compositions containing barium titanate (BaTiO 3 ) as a main component have been widely put into practical use. However, the sintering temperature of BaTiO3 as the main component is high, 1300 to 1400℃, and in order to use it in multilayer capacitors, materials that can withstand this sintering temperature, such as platinum or palladium, are required for the internal electrodes. The drawback was that it required the use of expensive precious metals such as metals, resulting in high manufacturing costs. For this reason, it has been desired to lower the sintering temperature of porcelain as low as possible in order to make it possible to use inexpensive metals mainly composed of silver or nickel. Therefore, Pb(Fe2/3W1/3)O 3 −Pb(Fe1/
2Nb1/2) O 3 (Special Publication No. 1983-34962) and (Sr/Pb)
TiO 3 −Pb(Mg1/2W1/2)O 3 (Japanese Patent Application Laid-Open No. 1983-21699)
There are many suggestions such as: (Objective of the Invention) The object of the present invention is to provide an excellent material that can be sintered at a low temperature of 1000° C. or lower, has a high dielectric constant, and exhibits good induction loss characteristics. (Structure of the Invention) The porcelain composition of the present invention is different from these, and is made of cobalt-lead tungstate [Pb(Co1/2W1/2)O 3 ].
When a two-component composition consisting of lead titanate and lead titanate [PbTiO 3 ] is expressed as [Pb(Co1/2W1/2)O 3 ] x [PbTiO 3 ] 1-x , x falls within the range of 0.35≦x≦0.75. characterized by something. The present invention will be explained in detail below with reference to Examples. (Example) Lead oxide (PbO) with a purity of 99% or more as a starting material,
Cobalt carbonate (CoCO 3 ), tungsten oxide (WO 3 ), and titanium oxide (TiO 2 ) are used and weighed to a predetermined mixing ratio. Next, after wet mixing in a ball mill, the mixture was prefired at 750 to 775°C. Thereafter, it was ground in a ball mill, separated, dried, and then sized with an organic binder and pressed at 0.7 ton/cm 2 . diameter 16
Four disks with a thickness of about 2 mm and a thickness of about 2 mm were made. Next, it was sintered in air at 900-980°C for 1 hour. Silver electrodes are baked at 600℃ on the top and bottom surfaces of the sintered disk, and digital
The capacitance and dielectric loss (tan δ) were measured using an LCR meter at a frequency of 1 kHz and a voltage of 1 Vrms, and the dielectric constant was calculated. The average value of four samples was taken as a representative. The relationship between the blending ratio X and the properties thus obtained is shown in the following table.
【表】
なお配合比Ｘが0.75を越えるとキユリー点が実
用温度範囲から低温側に大きくずれ、0.35未満で
は逆にキユリー点が高温側に大きくずれいずれも
誘電率が低下するため実用的でない。
（発明の効果）
表に示した結果から明らかなように本発明の磁
器組成物は900〜980℃という低温で焼結でき、し
かも誘電率が1550〜9170℃という高い値を示し、
誘電損失も良好な値であり、積層コンデンサ用材
料として適したものである。[Table] If the compounding ratio X exceeds 0.75, the Curie point will deviate significantly from the practical temperature range to the low temperature side, and if it is less than 0.35, the Curie point will deviate greatly to the high temperature side, and in both cases the dielectric constant will decrease, which is not practical. (Effects of the invention) As is clear from the results shown in the table, the ceramic composition of the present invention can be sintered at a low temperature of 900 to 980°C, and has a high dielectric constant of 1550 to 9170°C.
It also has a good dielectric loss and is suitable as a material for multilayer capacitors.
Claims (1)
１／２）O3〕とチタン酸鉛〔PbTiO3〕からなる２
成分組成物を〔Pb（Co1/2Ｗ1/2）O3〕x
〔PbTiO3〕1-xと表わした時に、ｘが0.35≦ｘ≦
0.75の範囲にあることを特徴とする磁器組成物。[Claims] 1 Cobalt-lead tungstate [Pb (Co1/2W
1/2) consisting of O 3 ] and lead titanate [PbTiO 3 ]
The component composition is [Pb(Co1/2W1/2)O 3 ] x
[PbTiO 3 ] When expressed as 1-x , x is 0.35≦x≦
Porcelain composition characterized in that it lies in the range of 0.75.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59033480A JPS60180951A (en) | 1984-02-24 | 1984-02-24 | Ceramic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59033480A JPS60180951A (en) | 1984-02-24 | 1984-02-24 | Ceramic composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60180951A JPS60180951A (en) | 1985-09-14 |
| JPH0565463B1 true JPH0565463B1 (en) | 1993-09-17 |
Family
ID=12387710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59033480A Pending JPS60180951A (en) | 1984-02-24 | 1984-02-24 | Ceramic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60180951A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764492A (en) * | 1986-06-10 | 1988-08-16 | North American Philips Corporation | Lead calcium titanate piezoelectric ceramic element |
-
1984
- 1984-02-24 JP JP59033480A patent/JPS60180951A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60180951A (en) | 1985-09-14 |
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