JPS63297265A - Dielectric ceramic composition for microwaves - Google Patents
Dielectric ceramic composition for microwavesInfo
- Publication number
- JPS63297265A JPS63297265A JP62132718A JP13271887A JPS63297265A JP S63297265 A JPS63297265 A JP S63297265A JP 62132718 A JP62132718 A JP 62132718A JP 13271887 A JP13271887 A JP 13271887A JP S63297265 A JPS63297265 A JP S63297265A
- Authority
- JP
- Japan
- Prior art keywords
- dielectric
- composition
- oxide
- dielectric constant
- microwave
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 27
- 239000000919 ceramic Substances 0.000 title claims abstract description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- FKTOIHSPIPYAPE-UHFFFAOYSA-N samarium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Sm+3].[Sm+3] FKTOIHSPIPYAPE-UHFFFAOYSA-N 0.000 claims abstract description 4
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 6
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 6
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 3
- MMKQUGHLEMYQSG-UHFFFAOYSA-N oxygen(2-);praseodymium(3+) Chemical compound [O-2].[O-2].[O-2].[Pr+3].[Pr+3] MMKQUGHLEMYQSG-UHFFFAOYSA-N 0.000 claims description 2
- 229910003447 praseodymium oxide Inorganic materials 0.000 claims description 2
- 229910052573 porcelain Inorganic materials 0.000 abstract description 5
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract 4
- 229910002637 Pr6O11 Inorganic materials 0.000 abstract 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 abstract 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910052797 bismuth Inorganic materials 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910001954 samarium oxide Inorganic materials 0.000 description 1
- 229940075630 samarium oxide Drugs 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、誘電体共振器等のマイクロ波回路素子に用い
られる誘電体材料に係り、金属酸化物を焼成して得られ
る高誘電率で、誘電損失が小さく、誘電率の温度係数の
小さい誘電体磁器組成物に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a dielectric material used in microwave circuit elements such as a dielectric resonator, and relates to a dielectric material with a high dielectric constant obtained by firing a metal oxide. , relates to a dielectric ceramic composition having low dielectric loss and a small temperature coefficient of dielectric constant.
（従来の技術）
近年、マイクロ波回路技術の進歩に伴い、回路の小型化
が図られている。(Prior Art) In recent years, with advances in microwave circuit technology, circuits have been made smaller.
従来から、このマイクロ波周波数帯（３００ＭＨｚ〜３
０ＧＨ２）の回路には、空胴共振器、アンテナなどが用
いられて来たが、これらはマイクロ波の波長と同程度の
大きさになるため回路の小型化には不向きであった。こ
れに対し、近年、マイクロ波周波数帯で使用される誘電
体共振器を用いたマイクロ波フィルタ、発振器の周波数
安定化を計るための小型誘電体共振器、マイクロ波ＩＣ
用のコンデンサや基盤等に用いられる誘電体磁器等、マ
イクロ波回路に誘電体磁器を用いて回路の小型化を図る
応用がなされている。これらの磁器に要求される特性は
、マイクロ波周波数帯での誘電損失が小さく、使用周波
数帯に適した高い誘電率をもち、誘電率の温度係数が小
さい事である。Conventionally, this microwave frequency band (300MHz to 3
Cavity resonators, antennas, and the like have been used in 0GH2) circuits, but these are not suitable for miniaturizing the circuit because their size is about the same as the wavelength of a microwave. In contrast, in recent years, microwave filters using dielectric resonators used in the microwave frequency band, small dielectric resonators for stabilizing the frequency of oscillators, and microwave ICs have been developed.
Dielectric porcelain is used in microwave circuits, such as dielectric porcelain used in capacitors and substrates, to reduce the size of the circuit. The characteristics required of these ceramics are a low dielectric loss in the microwave frequency band, a high dielectric constant suitable for the frequency band used, and a small temperature coefficient of the dielectric constant.
従来からこれらの特性を満足する磁器材料としては、Ｂ
ａ２ＴｉｓＯｚｏ系、 ＭｇＴｉ０．−ＣａＴｉＯ，系
、 Ｚｒ０２−ＴｉＯ、−３ｎ０２系などが知られては
いるが、これらはいずれもεｒが３０〜４０程度と小さ
いため、０．１〜４ＧＨｚの周波数帯では素子が大きく
なり、実用上問題が多い。Traditionally, B is a porcelain material that satisfies these characteristics.
a2TisOzo series, MgTi0. -CaTiO, Zr02-TiO, -3n02 systems, etc. are known, but all of these have small εr of about 30 to 40, so the elements are large in the 0.1 to 4 GHz frequency band, making them impractical. There are many problems above.
この０．１ＧＨｚ〜４ ＧＨｚの周波数帯での使用に適
した材料としては、εｒが７０〜９０程度のものとして
、Ｂａ０−ＴｉＯｚ−３ｎｌａＯ１系、 Ｂａ０−Ｔｉ
Ｏ，−Ｎｄ、０３系などの組成物を使用している。この
Ｂａｄ−Ｔｉｅ、−５ｍｚＯ，系の誘電体組成物につい
ては特公昭６０−５１２０１号に開示されている。Materials suitable for use in this frequency band of 0.1 GHz to 4 GHz, with an εr of about 70 to 90, include Ba0-TiOz-3nlaO1 system, Ba0-Ti
Compositions such as O, -Nd, and 03 systems are used. This Bad-Tie, -5mzO, based dielectric composition is disclosed in Japanese Patent Publication No. 51201/1983.
（発明が解決しようとする問題点）
しかし、この特公昭６０−５１２０１号に開示されてい
るような従来の誘電体磁器組成物を用いて、誘電体共振
器を製作した場合、共振周波数の温度係数（ｔｆ ）が
Ｏ（ＰＰ＋ｉ／’Ｃ）付近では１組成変動による温度係
数の変化が大きく、また無負荷Ｑが小さいなど、実用上
で問題点が多かった。(Problems to be Solved by the Invention) However, when a dielectric resonator is manufactured using a conventional dielectric ceramic composition as disclosed in Japanese Patent Publication No. 60-51201, the temperature at the resonant frequency When the coefficient (tf) is around O(PP+i/'C), there are many problems in practical use, such as a large change in temperature coefficient due to one change in composition and a small no-load Q.
（問題点を解決するための手段）
発明者らは、これらの欠点を鑑み種々の組成系について
検討した結果、酸化バリウム（ＢａＯ）と酸化チタン（
ＴｉＯ２）と酸化サマリウム（Ｓｍ２０３）と酸化セリ
ウム（ＣｅＯ２）と酸化プラセオジム（ＰｒｓＯ□１）
と酸化ビスマス（Ｂ１２０． ）とからなる誘電体磁器
組成物であって、組成式を
ｘＢａｏ・ｙＴｉｏ□・（ｚ−ｚ、 −ｚ、 ）ＳｍＯ
，／２・ｚ１ＣｅＯ２・，・ｚ２Ｐｒｏ１１／ｓと表わ
した時、組成範囲がモル分率で、７≦Ｘ≦１７゜５７≦
ｙ≦６３．２３≦ｚ≦３３． Ｏ＜Ｚ１≦１２−０ （
ｚ、≦１まただし１０ ＜ ｚ −ｚニーｚ２ の範囲
にある主成分組成に対し、酸化ビスマスを１０ｖｔ％以
下添加含有してなる誘電体磁器組成物が、誘電体共振器
、マイクロ波用コンデンサ、基盤等に用いる誘電体磁器
として優れた特性をもち、実用に供するに適した材料で
ある事を見出した。(Means for Solving the Problems) In view of these drawbacks, the inventors investigated various composition systems and found that barium oxide (BaO) and titanium oxide (
TiO2), samarium oxide (Sm203), cerium oxide (CeO2), and praseodymium oxide (PrsO□1)
A dielectric ceramic composition consisting of bismuth oxide (B120.) and bismuth oxide (B120.), whose composition formula is
When expressed as , /2・z1CeO2・,・z2Pro11/s, the composition range is the mole fraction, and 7≦X≦17°57≦
y≦63.23≦z≦33. O<Z1≦12-0 (
A dielectric ceramic composition containing 10 vt% or less of bismuth oxide added to a main component composition in the range of z, ≦1 but 10 < z −z knee z2 can be used for dielectric resonators, microwave capacitors, etc. It was discovered that this material has excellent properties as a dielectric ceramic used for substrates, etc., and is suitable for practical use.
（実施例）
以下本発明を実施例に従って説明する。試料を作成する
ための出発原料は、 ９９．９％以上の高純度のＢａＣ
０，、Ｔｉｅ、 、Ｓｍ、０． 、ＣｅＯ，、Ｐｒ、０
１．およびＢｉ、 Ｏ，の粉末を用い、所定の各組成に
なる様に秤量し、ボールミルに純水とともに投入し湿式
混合を行なった。この混合物を乾燥させた後、８００℃
〜１１００℃で４時間仮焼し、得られた仮焼粉末を所定
の各組成になる様に調合して、再びメノウボールミルに
純水とともに投入し、湿式粉砕を行なった。この様にし
て得られた粉砕物を乾燥させた後、バインダ水溶液を添
加混練して得た造粒粉末を１ 、５ ｔｏｎＺｄの圧力
を加えて成形し、得られた成形体を１２００℃〜１５０
０℃で２時間空気中で焼成を行なって焼成体を得た。そ
の後、得られた磁器を用いて誘電体共振器を構成し、誘
電体共振器の共振周波数と無負荷′Ｑを測定して誘電率
を求めた。得られた誘電体共振器の共振周波数は３〜６
ＧＨｚであった。(Examples) The present invention will be explained below according to Examples. The starting material for preparing the sample is BaC with a high purity of 99.9% or more.
0,,Tie, ,Sm,0. ,CeO,,Pr,0
1. Powders of Bi, O, and Bi were weighed to give each predetermined composition, and put into a ball mill together with pure water for wet mixing. After drying this mixture, 800℃
Calcined powder was calcined at ~1100° C. for 4 hours, and the resulting calcined powder was mixed to have each predetermined composition, and then put into the agate ball mill together with pure water again for wet pulverization. After drying the pulverized product obtained in this manner, the granulated powder obtained by adding and kneading an aqueous binder solution was molded by applying a pressure of 1.5 tonZd, and the resulting molded body was heated at 1200°C to 150°C.
Firing was performed in air at 0° C. for 2 hours to obtain a fired body. Thereafter, a dielectric resonator was constructed using the obtained ceramic, and the resonant frequency and no-load 'Q of the dielectric resonator were measured to determine the dielectric constant. The resonant frequency of the obtained dielectric resonator is 3 to 6
It was GHz.
共振周波数の温度依存性は誘電体共振器の共振周波数の
温度変化を一２５℃〜＋８５℃の間で測定して求めた。The temperature dependence of the resonant frequency was determined by measuring the temperature change of the resonant frequency of the dielectric resonator between -25°C and +85°C.
得られた試料での測定結果を第１表に示す。この表中で
傘部を付した試料は本発明の範囲外の比較例であり、こ
れ以外の試料が本発明の範囲内の実施例である。Table 1 shows the measurement results for the obtained samples. In this table, the samples with umbrellas are comparative examples outside the scope of the present invention, and the other samples are examples within the scope of the present invention.
（発明の効果）
以上のように、本発明にかかる誘電体磁器組成物は、マ
イクロ波周波数において誘電率が８０程度と大きく、か
つ誘電体損失が小さいと同時に、誘電率の温度係数が小
さい材料であることがわかる。(Effects of the Invention) As described above, the dielectric ceramic composition according to the present invention is a material having a large dielectric constant of about 80 at microwave frequencies, low dielectric loss, and a small temperature coefficient of dielectric constant. It can be seen that it is.
これらはマイクロ波周波数帯で使用される回路素子、基
盤として極めて有用な誘電体磁器材料であることは明白
である。なお本材料は低周波領域でも誘電損失が小さく
、Ｑ値の高いコンデンサ材料としても優れた材料である
ことを確認し゛た。It is clear that these dielectric ceramic materials are extremely useful as circuit elements and substrates used in the microwave frequency band. It was confirmed that this material has low dielectric loss even in the low frequency range and is an excellent material for capacitors with a high Q value.
Claims (1)
酸化サマリウム（Ｓｍ＿２Ｏ＿３）と酸化セリウム（Ｃ
ｅＯ＿２）と酸化プラセオジム（Ｐｒ＿６Ｏ＿１＿１）
と酸化ビスマス（Ｂｉ＿２Ｏ＿３）とからなる誘電体磁
器組成物であって、組成式をｘＢａＯ・ｙＴｉＯ＿２・
（ｚ−ｚ＿１−ｚ＿２）ＳｍＯ＿３＿／＿２・ｚ＿１Ｃ
ｅＯ＿２・ｚ＿２ＰｒＯ＿１＿１＿／＿６と表わした時
、組成範囲がモル分率で、７≦ｘ≦１７、５７≦ｙ≦６
３、２３≦ｚ≦３３、０＜ｚ＿１≦１２、０＜ｚ＿２≦
１２ただし１０＜ｚ−ｚ＿１−ｚ＿２の範囲にある主成
分組成に対し、酸化ビスマスを１０ｗｔ％以下添加含有
している事を特徴とする誘電体磁器組成物。Barium oxide (BaO), titanium oxide (TiO_2), samarium oxide (Sm_2O_3), and cerium oxide (C
eO_2) and praseodymium oxide (Pr_6O_1_1)
A dielectric ceramic composition consisting of bismuth oxide (Bi_2O_3) and bismuth oxide (Bi_2O_3), whose composition formula is xBaO・yTiO_2・
(z-z_1-z_2) SmO_3_/_2・z_1C
When expressed as eO_2・z_2PrO_1_1_/_6, the composition range is molar fraction, 7≦x≦17, 57≦y≦6
3, 23≦z≦33, 0<z_1≦12, 0<z_2≦
12 A dielectric ceramic composition characterized in that it contains bismuth oxide in an amount of 10 wt% or less with respect to a main component composition in the range of 10<z-z_1-z_2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62132718A JPS63297265A (en) | 1987-05-28 | 1987-05-28 | Dielectric ceramic composition for microwaves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62132718A JPS63297265A (en) | 1987-05-28 | 1987-05-28 | Dielectric ceramic composition for microwaves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63297265A true JPS63297265A (en) | 1988-12-05 |
| JPH0236546B2 JPH0236546B2 (en) | 1990-08-17 |
Family
ID=15087956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62132718A Granted JPS63297265A (en) | 1987-05-28 | 1987-05-28 | Dielectric ceramic composition for microwaves |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63297265A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6421811A (en) * | 1987-07-16 | 1989-01-25 | Nippon Ferrite Kk | Microwave dielectric porcelain component |
-
1987
- 1987-05-28 JP JP62132718A patent/JPS63297265A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6421811A (en) * | 1987-07-16 | 1989-01-25 | Nippon Ferrite Kk | Microwave dielectric porcelain component |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0236546B2 (en) | 1990-08-17 |
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