JPH0465018A - dielectric porcelain composition - Google Patents
dielectric porcelain compositionInfo
- Publication number
- JPH0465018A JPH0465018A JP2176645A JP17664590A JPH0465018A JP H0465018 A JPH0465018 A JP H0465018A JP 2176645 A JP2176645 A JP 2176645A JP 17664590 A JP17664590 A JP 17664590A JP H0465018 A JPH0465018 A JP H0465018A
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- less
- mol
- weight
- cao
- 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
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- 239000000203 mixture Substances 0.000 title claims abstract description 26
- 229910052573 porcelain Inorganic materials 0.000 title description 2
- 239000000919 ceramic Substances 0.000 claims abstract description 8
- 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 claims abstract description 4
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract 5
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Inorganic materials [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 claims abstract 5
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910001935 vanadium oxide Inorganic materials 0.000 claims abstract 2
- PLDDOISOJJCEMH-UHFFFAOYSA-N neodymium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Nd+3].[Nd+3] PLDDOISOJJCEMH-UHFFFAOYSA-N 0.000 claims description 5
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 claims description 4
- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 0.000 claims description 3
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical group [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims 2
- 239000000292 calcium oxide Substances 0.000 claims 2
- 229910000416 bismuth oxide Inorganic materials 0.000 claims 1
- 239000000470 constituent Substances 0.000 claims 1
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims 1
- UFQXGXDIJMBKTC-UHFFFAOYSA-N oxostrontium Chemical compound [Sr]=O UFQXGXDIJMBKTC-UHFFFAOYSA-N 0.000 claims 1
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract description 6
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910001936 tantalum oxide Inorganic materials 0.000 abstract description 3
- 229910000484 niobium oxide Inorganic materials 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract 1
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- -1 organic acid salts Chemical class 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910019704 Nb2O Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910001938 gadolinium oxide Inorganic materials 0.000 description 1
- 229940075613 gadolinium oxide Drugs 0.000 description 1
- 229910000311 lanthanide oxide Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910001954 samarium oxide Inorganic materials 0.000 description 1
- 229940075630 samarium oxide Drugs 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、大きな比誘電率（ｉ ｒ）を持ち、共振周波
数の温度係数（τｆ）が、小さくかつ広範囲に制御でき
る誘電体磁器組成物に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention provides a dielectric ceramic composition that has a large relative permittivity (ir) and a temperature coefficient (τf) of a resonance frequency that can be controlled over a small and wide range. It is related to.
（従来の技術）
ＭＨｚ帯からＧＨｚ帯のマイクロ波帯域の電波を利用し
た自動車電話、コードレス電話等の移動無線器に、最近
、セラミックフィルターが多く用いられるようになった
。これは、セラミックフィルターを構成している誘電体
が大きな比誘電率（εｒ）、無負荷Ｑ（Ｑｏ）を持ち、
共振周波数の温度係数（τｆ）の値が、その誘電体の組
成によりＯを中心として正負いずれも自由に制御できる
という利点を持つことに起因している。(Prior Art) Ceramic filters have recently come into widespread use in mobile radio devices such as car phones and cordless phones that utilize radio waves in the microwave band from the MHz band to the GHz band. This is because the dielectric material that makes up the ceramic filter has a large relative permittivity (εr) and no-load Q (Qo).
This is due to the advantage that the value of the temperature coefficient (τf) of the resonant frequency can be freely controlled both positive and negative with respect to O depending on the composition of the dielectric material.
従来、上述の誘電体材料として、ＭｇＯ−Ｃａ０−Ｔｉ
Ｏ□系、ＺｒＯ□−Ｔｉｅ□−５ｎＯ□系、Ｂａｄ−Ｔ
ｉＯ２−ランタノイド酸化物系を使用していた。Conventionally, MgO-Ca0-Ti has been used as the above-mentioned dielectric material.
O□ system, ZrO□-Tie□-5nO□ system, Bad-T
An iO2-lanthanide oxide system was used.
（発明が解決しようとする課題）
しかしながら、これらの材料はｓｒがたかだか１００以
下であり、共振素子を作成した場合その小型化（１／ε
ｒ）には、おのずと限界があった。(Problem to be solved by the invention) However, these materials have an sr of at most 100 or less, and when a resonant element is created, it is difficult to miniaturize it (1/ε
r) naturally had its limits.
従って、εｒの高い誘電体磁器組成物が切望されていた
。Therefore, a dielectric ceramic composition with a high εr has been desired.
（課題を解決するための手段）
本発明者らは、ＭＨｚ帯からＧＨｚ帯のマイクロ波領域
において、εｒが１００以上、かっτｆが±１１００ｐ
ｐ／ ”Ｃ以下、かつＱ。が１００以上の組成物を得る
べく、種々の組成系について検討した結果、ＣａＯｃモ
ル％、 ＳｒＯｂモル％、 Ｂｉ２Ｏ３ｃモル％。(Means for Solving the Problem) The present inventors have determined that εr is 100 or more and τf is ±1100 p in the microwave region from the MHz band to the GHz band.
In order to obtain a composition with p/''C or less and Q. of 100 or more, we investigated various composition systems, and found that: CaOc mol%, SrOb mol%, Bi2O3c mol%.
ＴｉＯ□ ６モル％の組成系よりなり、それぞれの組成
範囲が
０≦ａ （３０，Ｏ＜ ｂ≦２０
１０≦ｃ≦５０． ４０≦ｄ≦８０
ただしＯ＜ ａ ＋ ｂ≦３０である主成分に、酸化バ
ナジウム（Ｖ２Ｏ５）を２重量％以下、酸化ニオブ（Ｎ
ｂ２Ｏｓ）を５重量％以下、酸化タンタル（Ｔａ２０．
）を５重量％以下のうち少なくとも１種類添加した時に
、所望の特性が得られることを明らかとしたものである
。It consists of a composition system of TiO 2% by weight or less of vanadium oxide (V2O5) and niobium oxide (N
b2Os) up to 5% by weight, tantalum oxide (Ta20.
It has been clarified that the desired characteristics can be obtained when at least one type of (5% by weight or less) is added.
また、ＣａＯｃモル％、 ＳｒＯｂモル％、 Ｂｉ２Ｏ
，ｃモル％、 ＴｉＯ□ｄモル％の組成系よりなり、そ
れぞれの組成範囲が、
０≦ａ ＜３０． Ｏ＜ ｂ≦２０１０≦ｃ≦５０
． ４０≦ｄ≦８０
ただしＯ＜ ａ ＋ ｂ≦３０である主成分に、酸化ラ
ンタン（Ｌａ２Ｏ３）を５重量％以下、酸化ネオジム（
Ｎｄ２０３）を５重量％以下、酸化サマリウム（Ｓｍ。Also, CaOc mol%, SrOb mol%, Bi2O
, c mol%, and TiO□d mol%, and each composition range is 0≦a<30. O< b≦2010≦c≦50
．． 40≦d≦80 However, O<a + b≦30 The main components include 5% by weight or less of lanthanum oxide (La2O3) and neodymium oxide (
Nd203) up to 5% by weight, samarium oxide (Sm).
０３）を５重量％以下、酸化ガドリニウム（Ｇｄ２０３
）を５重量％以下のうち少なくとも１種類添加したと
きに、所望の特性が得られることを明らかにしたもので
ある。03) up to 5% by weight, gadolinium oxide (Gd203)
It has been clarified that the desired characteristics can be obtained when at least one type of (5% by weight or less) is added.
本発明において、ＣａＯ１ＳｒＯ１Ｂｉ、 ０．、Ｔｉ
Ｏ２の組成は、この範囲外では、Ｑｏが１００以下とな
り実用的ではない。In the present invention, CaO1SrO1Bi, 0. , Ti
If the O2 composition is outside this range, the Qo will be 100 or less, which is not practical.
また、■２０ｓ の添加量が２重量％を越えると、Ｑｏ
が１００以下となり、τｆもマイナス側に大きくなる。Also, if the amount of 20s added exceeds 2% by weight, the Qo
becomes 100 or less, and τf also increases on the negative side.
また＋ Ｎｂ２Ｏ，、Ｔａ２Ｏ，の添加量が、５重量％
を越えると、Ｑｏが１００以下に低下してしまう。また
、τｆも測定時、高温側で測定ピークがノイズに埋もれ
てしまい測定不能となり、実用に不適当である。In addition, the amount of +Nb2O, Ta2O, added is 5% by weight.
If it exceeds, Qo will drop to 100 or less. Furthermore, when measuring τf, the measured peak is buried in noise on the high temperature side, making it impossible to measure, making it unsuitable for practical use.
また、Ｌａ２０． 、 Ｓ＋ｍ２０３． Ｇｄ、０２の
添加量が５重量％を超えると、Ｑｏ が１００以下とな
り、τｆもプラス側に大きくなり、実用には不適当とな
る。Also, La20. , S+m203. If the amount of Gd or 02 added exceeds 5% by weight, Qo will be 100 or less and τf will also increase on the positive side, making it unsuitable for practical use.
なお、本発明の誘電体磁器組成物は、所定量の素原料を
混合・焼成することにより、最終的に酸化物磁器組成物
になればよく、素原料は熱分解して酸化物となる炭酸塩
・硝酸塩・有機酸塩などでも良い。Note that the dielectric ceramic composition of the present invention can be finally made into an oxide ceramic composition by mixing and firing a predetermined amount of raw materials, and the raw materials are carbonic acid that is thermally decomposed to become an oxide. Salts, nitrates, organic acid salts, etc. may also be used.
（実施例）
ＣａＣＯ，、５ｒＣＯ，、Ｂｉ、０．、 ＴｉＯ，ｔ
Ｖ、Ｏｓｔ ＮｂｚＯｓｔ Ｔａ２Ｏ、を第１表に示す
各組成で秤量し、めのうボールを入れたポリエチレンポ
ットにアセトンとともに投入し、１６時間湿式混合した
。(Example) CaCO,, 5rCO,, Bi, 0. , TiO,t
V, Ost NbzOst Ta2O, were weighed in each composition shown in Table 1, put into a polyethylene pot containing an agate ball together with acetone, and wet mixed for 16 hours.
このスラリーを加熱乾燥した後、５メツシユのふるいで
整粒し、空気中において１０００℃＝２時間で仮焼し、
再び、めのうボールを入れたポリエチレンポットにアセ
トンとともに投入し、１６時間粉砕した。After heating and drying this slurry, it was sieved through a 5-mesh sieve, and calcined in air at 1000°C for 2 hours.
Again, the agate balls were placed in a polyethylene pot together with acetone and ground for 16 hours.
得られたスラリーを加熱乾燥した後、ポリビニルアルコ
ール水溶液を加えて混線を行い、３２メツシユのふるい
で造粒した。After the obtained slurry was dried by heating, an aqueous polyvinyl alcohol solution was added to perform cross-mixing, and the mixture was granulated using a 32-mesh sieve.
造粒粉をｉｔ／ｃｄで成形し、空気中において１２００
〜１４００℃４時間で焼成した。得られた焼成体を直径
約３０閣、高さ約１５閣に加工し、約Ｉ ＧＨｚに生ず
るＴＥｏ＞ １モードのピークで、εｒおよびＱｏを算
出し、次いで一２０℃から＋６０℃における共振周波数
の変化より、τｆを求めた。The granulated powder was molded at it/cd and heated to 1200 m in air.
It was fired at ~1400°C for 4 hours. The obtained fired body was processed to have a diameter of about 30 mm and a height of about 15 mm, and εr and Qo were calculated at the peak of the TEo > 1 mode occurring at about I GHz, and then the resonance frequency from -20°C to +60°C was calculated. τf was determined from the change in .
各特性を第１表に示した。なお１本発明の組成範囲内の
試料は実施例、本発明の組成範囲外の試料は比較例とし
て区別した。Each characteristic is shown in Table 1. Note that samples within the composition range of the present invention were classified as Examples, and samples outside the composition range of the present invention were classified as Comparative Examples.
また、 ＣａＣ０，、５ｒＣＯ，、Ｂｉ２Ｏ３、ＴｉＯ
２，Ｌａ２０．、 ｐｊｄ２Ｏ３，Ｓ閣２Ｏ３、Ｇｄ、
０３を第２表に示す各組成で秤量し、めのうボールを入
れたポリエチレンポットにアセトンとともに投入し、
１６時時間式混合した。Also, CaC0,, 5rCO,, Bi2O3, TiO
2, La20. , pjd2O3,Skaku2O3,Gd,
Weighed 03 with each composition shown in Table 2, put it in a polyethylene pot containing an agate ball together with acetone,
The mixture was mixed for 16 hours.
このスラリーを加熱乾燥した後、５メツシユのふるいで
整粒し、空気中において１０００℃：２時間で仮焼し、
再び、めのうボールを入れたポリエチレンポットにアセ
トンとともに投入し、１６時間粉砕した。After heating and drying this slurry, it was sized through a 5-mesh sieve, and calcined in air at 1000°C for 2 hours.
Again, the agate balls were placed in a polyethylene pot together with acetone and ground for 16 hours.
得られたスラリーを加熱乾燥した後、ポリビニルアルコ
ール水溶液を加えて混線を行い、３２メツシユのふるい
で造粒した。After the obtained slurry was dried by heating, an aqueous polyvinyl alcohol solution was added to perform cross-mixing, and the mixture was granulated using a 32-mesh sieve.
造粒粉を１ｔ／ｃｉで成形し、空気中において１２００
〜１４００℃４時間で焼成した。得られた焼成体を直径
約３０閣、高さ約１５■に加工し、約Ｉ Ｇ）Ｉｚに生
ずるＴＥ０１−１モードのピークで、ｓｒおよびＱ、を
算出し１次いで一２０℃から＋６０℃における共振周波
数の変化より、τｆを求めた。The granulated powder was molded at 1 t/ci and heated at 1200 t/ci in air.
It was fired at ~1400°C for 4 hours. The obtained fired body was processed to have a diameter of about 30cm and a height of about 15cm, and sr and Q were calculated at the peak of the TE01-1 mode occurring at about IG)Iz, and then heated from -20℃ to +60℃. τf was determined from the change in the resonant frequency at .
各特性を第２表に示した。なお、本発明の組成範囲内の
試料は実施例、本発明の組成範囲外の試料は比較例とし
て区別した。Each characteristic is shown in Table 2. Note that samples within the composition range of the present invention were classified as Examples, and samples outside the composition range of the present invention were classified as Comparative Examples.
第２表
（発明の効果）
本発明は、以上のようにマイクロ波領域において、εｒ
が大きく、Ｑｏ も高く、又τｆの値をＣａＯとＳｒＯ
の組成比、又Ｖ２Ｏ３，Ｎｂ２Ｏ５＋ Ｔａｍｅｓの添
加量、又はＬａ２０． 、 Ｎｄ２Ｏ３，Ｓｍ２Ｏ３，
Ｇｄ２Ｏ，の添加量により幅広く調整できるものであり
、マイクロ波用誘電体、また温度補償用コンデンサなど
に用ｔ＼ることかでき、工業的価値が高いものである。Table 2 (Effects of the Invention) As described above, the present invention provides εr
is large, Qo is also high, and the value of τf is different from CaO and SrO.
composition ratio, addition amount of V2O3, Nb2O5+ Tames, or La20. , Nd2O3, Sm2O3,
It can be adjusted over a wide range by adjusting the amount of Gd2O added, and can be used in microwave dielectrics, temperature compensation capacitors, etc., and has high industrial value.
特許出願人 日立フェライト株式会社／ 手続補正書彷式） ％式％ １、事件の表示 平成２年特許願第１７６６４５号 ２、発明の名称 誘電体磁器組成物 ３、補正をする者 事件との関係Patent applicant Hitachi Ferrite Co., Ltd./ Procedural amendment form) %formula% 1. Display of incident 1990 Patent Application No. 176645 2. Name of the invention dielectric porcelain composition 3. Person who makes corrections Relationship with the incident
Claims (2)
ＳｒＯ）、酸化ビスマス（Ｂｉ＿２Ｏ＿３）および酸化
チタン（ＴｉＯ＿２）を構成成分とし、組成式を ａ ＣａＯ・ｂ ＳｒＯ・ｃ Ｂｉ＿２Ｏ＿３・ｄ Ｔ
ｉＯ＿２で表した時、ａ，ｂ，ｃ，ｄがモル％で、それ
ぞれ ０≦ａ＜３０， ０＜ｂ≦２０ １０≦ｃ≦５０， ４０≦ｄ≦８０ ただし ０＜ａ＋ｂ≦３０ の範囲からなる主成分に、酸化バナジウム（Ｖ＿２Ｏ＿
５）を２重量％以下、酸化ニオブ（Ｎｂ＿２Ｏ＿５）を
５重量％以下、酸化タンタル（Ｔａ＿２Ｏ＿５）を５重
量％以下のうち少なくとも１種類添加したことを特徴と
する誘電体磁器組成物。1. Calcium oxide (CaO), strontium oxide (
The compositional formula is a CaO・b SrO・c Bi_2O_3・d T.
When expressed in iO_2, a, b, c, and d are mol%, respectively, 0≦a<30, 0<b≦20, 10≦c≦50, 40≦d≦80, but from the range of 0<a+b≦30. The main component is vanadium oxide (V_2O_
A dielectric ceramic composition characterized in that at least one of 2% by weight or less of 5), 5% by weight or less of niobium oxide (Nb_2O_5), and 5% by weight or less of tantalum oxide (Ta_2O_5) is added.
ＳｒＯ）、酸化ビスマス（Ｂｉ＿２Ｏ＿３）、酸化チタ
ン（ＴｉＯ＿２）を構成成分とし、組成式を ａ ＣａＯ・ｂ ＳｒＯ・ｃ Ｂｉ＿２Ｏ＿３・ｄ Ｔ
ｉＯ＿２で表した時、ａ，ｂ，ｃ，ｄ，がモル％で、そ
れぞれ ０≦ａ＜３０，０＜ｂ≦２０ １０≦ｃ≦５０，４０≦ｄ≦８０ ただし ０＜ａ＋ｂ≦３０ の範囲からなる主成分に、酸化ランタン（Ｌａ＿２Ｏ＿
３）を５重量％以下、酸化ネオジム（Ｎｄ＿２Ｏ＿３）
を５重量％以下、酸化サマリウム（Ｓｍ＿２Ｏ＿３）を
５重量％以下、酸化ガドリニウム（Ｇｄ＿２Ｏ＿３）を
５重量％以下のうち少なくとも１種類添加したことを特
徴とする誘電体磁器組成物。2. Calcium oxide (CaO), strontium oxide (
SrO), bismuth oxide (Bi_2O_3), and titanium oxide (TiO_2) are the constituent components, and the composition formula is a CaO・b SrO・c Bi_2O_3・d T
When expressed in iO_2, a, b, c, and d are mol%, respectively, within the range of 0≦a<30, 0<b≦20, 10≦c≦50, 40≦d≦80, but 0<a+b≦30. The main component is lanthanum oxide (La_2O_
3) up to 5% by weight, neodymium oxide (Nd_2O_3)
A dielectric ceramic composition characterized in that at least one of the following is added: 5% by weight or less of samarium oxide (Sm_2O_3), and 5% by weight or less of gadolinium oxide (Gd_2O_3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2176645A JPH0465018A (en) | 1990-07-02 | 1990-07-02 | dielectric porcelain composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2176645A JPH0465018A (en) | 1990-07-02 | 1990-07-02 | dielectric porcelain composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0465018A true JPH0465018A (en) | 1992-03-02 |
Family
ID=16017206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2176645A Pending JPH0465018A (en) | 1990-07-02 | 1990-07-02 | dielectric porcelain composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0465018A (en) |
-
1990
- 1990-07-02 JP JP2176645A patent/JPH0465018A/en active Pending
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