JPS6240316B2 - - Google Patents
Info
- Publication number
- JPS6240316B2 JPS6240316B2 JP55060902A JP6090280A JPS6240316B2 JP S6240316 B2 JPS6240316 B2 JP S6240316B2 JP 55060902 A JP55060902 A JP 55060902A JP 6090280 A JP6090280 A JP 6090280A JP S6240316 B2 JPS6240316 B2 JP S6240316B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- dielectric constant
- oxide
- atomic
- iron
- 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
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000919 ceramic Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 4
- 150000002910 rare earth metals Chemical class 0.000 claims description 4
- NKTZYSOLHFIEMF-UHFFFAOYSA-N dioxido(dioxo)tungsten;lead(2+) Chemical compound [Pb+2].[O-][W]([O-])(=O)=O NKTZYSOLHFIEMF-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 239000010955 niobium Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-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
- 239000003989 dielectric material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 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 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- PLDDOISOJJCEMH-UHFFFAOYSA-N neodymium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Nd+3].[Nd+3] PLDDOISOJJCEMH-UHFFFAOYSA-N 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
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 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
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 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
本発明は鉄・タングステン酸鉛
〔Pe2/3W11/3〕O3〕鉄・ニオブ酸鉛〔Pb
（Fe1/2Nb1/2）O3〕系磁器組成物に関する。
従来高誘電率系誘電体として、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とおりである。しかしなが
らBaTiO3を主成分とするものの焼結温度は通常
1300℃〜1400℃の高温であり、特に積層型コンデ
ンサの場合には、この焼結温度に適した内部電極
として、主成分が白金またはパラジウム等の高価
な貴金属を使用しなければならないという欠点を
有していた。
このため銀等を主成分とする安価な内部電極を
使用可能とするためには、焼結温度ができるだけ
低温、特に1000℃以下の温度で焼結できる誘電体
が強く要望されていた。
本発明の目的は、1000℃以下の温度で焼結で
き、誘電率が著るしく高く、かつ誘電損失が小さ
く、しかも比抵抗の高い組成物を提供することに
ある。
本発明者等は既に1000℃以下で焼結できるPb
（Fe2/3W1/3）O3とPb（Fe1/2Nb1/2）O3から
なる二成分系高誘電率磁器組成物を提案した（特
開昭52−87700）。この組成物は優れた誘電特性を
有しており磁気コンデンサとして実用化されよう
としている。しかしながら誘電損失や比抵抗がや
や不満足であり、用途は自ら狭い範囲に限定せざ
るを得なかつた。
本発明は、この二成分系組成物をPb
（Fe2/3W1/3）ｘ（Fe1/2Nb1/2）1-xO3と表わ
したとき配合比ｘが0.2≦ｘ0.5の範囲内にある
主成分組成物に副成分として少なくとも１種類以
上の希土類金属元素を0.02〜１原子％含有せしめ
ることによつて高誘電率を保ち、かつ誘電損失を
減少させ、しかも比抵抗を増大せしめ、量産性に
富む、安価で優れた高誘電率磁器組成物を提供す
るものである。
以下本発明を実施例により詳細に説明する。
実施例
出発原料として、酸化鉛（PbO）、酸化鉄
（Fe2O3）、酸化タングステン（WO3）、酸化ニオ
ブ（Nb2O5、酸化ランタン（La2O3）、酸化セリウ
ム（CeO2）、酸化ネオジウム（Nd2O3）、酸化サ
マリウム（Sm2O3）、酸化（Gd2O3）を使用し、所
定の配合比に秤量する。次に、ポールミル中で湿
式混合した後750℃〜850℃で予焼を行い、この粉
末を粉砕した後、約0.7ton／cm2の圧力で、直径約
16mm、厚さ約10mmの円柱に加圧成型した後、880
℃〜980℃で焼結した。得られた焼結体を約0.5mm
の円板に切断した後、銀電極を焼付けた。このよ
うにして得られた磁気組成物の配合比と諸特性の
関係を表に示す。
The present invention uses iron/lead tungstate [Pe 2/3 W 11/3 ] O 3 ] iron/lead niobate [Pb
(Fe 1/2 Nb 1/2 ) O 3 ]-based ceramic composition. It is well known that as a conventional high permittivity dielectric material, a material containing barium titanate [BaTiO 3 ] as a main component has been widely put into practical use. However, the sintering temperature for materials whose main component is BaTiO3 is usually
The high temperature is 1300°C to 1400°C, and especially in the case of multilayer capacitors, the drawback is that an expensive noble metal such as platinum or palladium must be used as the main component for the internal electrode suitable for this sintering temperature. had. Therefore, in order to make it possible to use inexpensive internal electrodes mainly composed of silver or the like, there has been a strong demand for a dielectric material that can be sintered at as low a sintering temperature as possible, particularly at a temperature of 1000° C. or lower. An object of the present invention is to provide a composition that can be sintered at a temperature of 1000°C or lower, has a significantly high dielectric constant, low dielectric loss, and high specific resistance. The inventors have already discovered that Pb can be sintered at temperatures below 1000℃.
A binary high permittivity ceramic composition consisting of (Fe 2/3 W 1/3 ) O 3 and Pb (Fe 1/2 Nb 1/2 ) O 3 was proposed (Japanese Patent Application Laid-Open No. 1987-87700). This composition has excellent dielectric properties and is about to be put into practical use as a magnetic capacitor. However, the dielectric loss and resistivity were somewhat unsatisfactory, and the application had to be limited to a narrow range. The present invention uses this two-component composition as Pb
(Fe 2/3 W 1/3 ) x (Fe 1/2 Nb 1/2 ) 1-x O 3 When the mixing ratio By containing 0.02 to 1 atomic percent of at least one kind of rare earth metal element as a component, it maintains a high dielectric constant, reduces dielectric loss, and increases specific resistance, making it easy to mass produce, inexpensive, and excellent. The present invention provides a high dielectric constant ceramic composition. The present invention will be explained in detail below using examples. Examples Starting materials include lead oxide (PbO), iron oxide (Fe 2 O 3 ), tungsten oxide (WO 3 ), niobium oxide (Nb 2 O 5 ), lanthanum oxide (La 2 O 3 ), and cerium oxide (CeO 2 ). ), neodymium oxide (Nd 2 O 3 ), samarium oxide (Sm 2 O 3 ), and oxide (Gd 2 O 3 ) are weighed to a predetermined mixing ratio.Next, after wet mixing in a Pall mill, 750 After pre-firing at ℃~850℃ and pulverizing this powder, it is crushed into a powder with a diameter of approx .
After pressure molding into a cylinder of 16mm and approximately 10mm thick, 880
Sintered at ℃~980℃. The obtained sintered body is about 0.5mm
After cutting into disks, silver electrodes were baked. The relationship between the blending ratio and various properties of the magnetic composition thus obtained is shown in the table.
【表】【table】
【表】
ここで誘電率および誘電損失は周波数1KHz、
温度20℃で測定した。比抵抗は直流100Vを印加
して、温度20℃で測定した。
表によつて明らかなように、副成分として、少
なくとも一つ以上の希土類金属元素を含有せしめ
ることにより、高誘電率を保ち、かつ誘電損失を
減少せしめ、しかも比抵抗を著しく高めて、実用
性に富む優れた高誘電率磁器組成物が得られるこ
とがわかる。焼結温度が1000℃以下の低温である
ため、焼結に伴う炉材の耐久性の著るしい向上や
電力費用の低減等による製造コストの低下はいう
に及ばず、特に大容量積層コンデンサの内部電極
の低価格化を実現できるという極めて量産性に富
む材料を提供するものである。
なお主成分配合比ｘが0.2未満あるいは0.5を超
える範囲の組成物は、キユリー点が室温より高温
側あるいは低温側に大きくずれるため室温での誘
電率が低くなる。また副成分である希土類金属元
素の中から一つ以上の金属元素の含有量が0.02原
子％未満では、誘電損失や比抵抗の改善効果が小
さく、１原子％を越えると誘電損失が大きくな
る。
なお、上記実施例では使用原料は主として酸化
物を用いたが、焼結することによつて容易に酸化
物となる原料たとえば炭酸塩を用いても同等の効
果が得られることは言うまでもない。[Table] Here, the dielectric constant and dielectric loss are at a frequency of 1KHz,
Measured at a temperature of 20°C. The specific resistance was measured at a temperature of 20°C by applying 100V DC. As is clear from the table, by containing at least one rare earth metal element as a subcomponent, it is possible to maintain a high dielectric constant, reduce dielectric loss, and significantly increase specific resistance, making it practical. It can be seen that an excellent high dielectric constant ceramic composition rich in porcelain compositions can be obtained. Since the sintering temperature is low, below 1000°C, it not only significantly improves the durability of furnace materials and reduces manufacturing costs due to reduced electricity costs, but it is especially effective for large-capacity multilayer capacitors. The present invention provides a material that is highly mass-producible and can reduce the cost of internal electrodes. In addition, a composition in which the main component blending ratio x is less than 0.2 or more than 0.5 has a low dielectric constant at room temperature because the Curie point is largely shifted to a higher temperature side or a lower temperature side than room temperature. Further, if the content of one or more metal elements among the rare earth metal elements as subcomponents is less than 0.02 atomic %, the effect of improving dielectric loss and resistivity is small, and if it exceeds 1 atomic %, dielectric loss becomes large. Although oxides were mainly used as raw materials in the above embodiments, it goes without saying that the same effect can be obtained by using raw materials that easily become oxides by sintering, such as carbonates.
Claims (1)
（Fe2/3W11/3）O3〕および鉄・ニオブ酸鉛〔Pb
（Fe1/2Nb1/2）O3〕からなる二成分組成物をPb
（Fe2/3W1/3）ｘ（Fe1/2Nb1/2）1-xO3と表わ
したときに配合比ｘが0.2≦ｘ≦0.5の範囲内にあ
る主成分組成物に副成分として少くとも一つ以上
の希土類金属元素を前記主成分組成物に対して
0.02原子％以上１原子％以下含有せしめたことを
特徴とする高誘電率磁器組成物。[Claims] 1. Iron/lead tungstate [Pb
(Fe 2/3 W 11/3 )O 3 ] and iron/lead niobate [Pb
(Fe 1/2 Nb 1/2 )O 3 ]
( Fe 2/3 W 1/3 ) At least one rare earth metal element is added as a subcomponent to the main component composition.
A high dielectric constant ceramic composition characterized by containing 0.02 atomic % or more and 1 atomic % or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6090280A JPS56160372A (en) | 1980-05-08 | 1980-05-08 | High dielectric constant ceramic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6090280A JPS56160372A (en) | 1980-05-08 | 1980-05-08 | High dielectric constant ceramic composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56160372A JPS56160372A (en) | 1981-12-10 |
| JPS6240316B2 true JPS6240316B2 (en) | 1987-08-27 |
Family
ID=13155745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6090280A Granted JPS56160372A (en) | 1980-05-08 | 1980-05-08 | High dielectric constant ceramic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56160372A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102347542B1 (en) | 2020-08-27 | 2022-01-05 | 주식회사 세이포드 | Smart pillow and method of improving sleep quality using it and digital therapeutics using it |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2660010B2 (en) * | 1988-08-31 | 1997-10-08 | 株式会社東芝 | High dielectric constant porcelain composition and ceramic capacitor |
| JP2762309B2 (en) * | 1989-12-22 | 1998-06-04 | マルコン電子株式会社 | Dielectric ceramic composition and electronic component using the same |
-
1980
- 1980-05-08 JP JP6090280A patent/JPS56160372A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102347542B1 (en) | 2020-08-27 | 2022-01-05 | 주식회사 세이포드 | Smart pillow and method of improving sleep quality using it and digital therapeutics using it |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56160372A (en) | 1981-12-10 |
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