JPS63237304A - Dielectric ceramic composition - Google Patents
Dielectric ceramic compositionInfo
- Publication number
- JPS63237304A JPS63237304A JP62070891A JP7089187A JPS63237304A JP S63237304 A JPS63237304 A JP S63237304A JP 62070891 A JP62070891 A JP 62070891A JP 7089187 A JP7089187 A JP 7089187A JP S63237304 A JPS63237304 A JP S63237304A
- Authority
- JP
- Japan
- Prior art keywords
- oxide
- dielectric
- present
- composition
- sample
- 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 description 40
- 239000000919 ceramic Substances 0.000 title claims description 17
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 12
- 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 12
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 6
- 229910000420 cerium 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
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 6
- 229910001954 samarium oxide Inorganic materials 0.000 claims description 6
- 229940075630 samarium oxide Drugs 0.000 claims description 6
- 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 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 6
- 210000003754 fetus Anatomy 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910003087 TiOx Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、マイクロ波誘電体共振器用材料として好適で
あって、誘電損失が小さく、周波数温度係数の制御も容
易な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 ceramic composition suitable as a material for microwave dielectric resonators, which has low dielectric loss and whose frequency temperature coefficient can be easily controlled. .
「従来の技術」
近年、衛星通信や自動車電話等の普及につれてマイクロ
波を取り扱う高周波回路技術が進展し、これに伴って回
路の小型化が一層望まれつつある状況である。"Prior Art" In recent years, with the spread of satellite communications, car telephones, etc., high frequency circuit technology that handles microwaves has progressed, and as a result, miniaturization of circuits is increasingly desired.
従来、この種の高周波回路には空洞共振器が使用されて
いたが、空洞共振器の大きさはマイクロ波の波長と同程
度になるために、回路の小型化に対する障害となってい
た。そこでこの間層を解決するために、誘電体磁器を使
用して波長そのものを短縮することにより小型化を図る
試みがなされている。この種の誘電体磁器には、比誘電
率（ｅｒ）が高く、誘電損失（ｔａｎδ）が小さく、し
かも周波数温度係数（τｆ）をＯｐｐｍ／’Ｃを中心と
して任意に設定できるものが望ましい。Conventionally, cavity resonators have been used in this type of high-frequency circuit, but the size of the cavity resonator is comparable to the wavelength of the microwave, which has been an obstacle to miniaturizing the circuit. Therefore, in order to solve this interlayer problem, attempts have been made to reduce the size by shortening the wavelength itself using dielectric ceramics. It is desirable for this type of dielectric ceramic to have a high relative dielectric constant (er), a small dielectric loss (tan δ), and a frequency temperature coefficient (τf) that can be arbitrarily set around Oppm/'C.
そこで、従来、これらの要求を満゛たすべき誘電体磁器
組成物として、Ｂ ａｏ −Ｔ ｉｏ を系、Ｔｉ１ｔ
−Ｚ ｒｏ ｔ−Ｓ ｎＯ！系、ＣａＴ ｉＯｓ −Ｍ
ｇＴ ｉｏ ３− Ｌ ａｔＯｌ−ＴｉＯｘ系等の組成
物が提供されている。Therefore, conventionally, as dielectric ceramic compositions that should satisfy these requirements, Bao-Tio system, Ti1t
-Zrot-S nO! system, CaTiOs-M
Compositions such as the gTio3-LatOl-TiOx system have been provided.
「発明が解決しようとする問題点」
しかしながら、前記従来の組成物からなる誘電体共振器
の場合、共振周波数の温度係数をＯｐｐｍ７℃付近に設
定しようとすると、比誘電率が２０〜４０程度の低い値
となってしまう問題がある。"Problems to be Solved by the Invention" However, in the case of a dielectric resonator made of the above-mentioned conventional composition, when trying to set the temperature coefficient of the resonant frequency to around 7°C Oppm, the dielectric constant is about 20 to 40. There is a problem that the value becomes low.
このため３ＧＨｚ以下の周波数帯用では小型化が困難と
なる問題がある。For this reason, there is a problem in that it is difficult to downsize the device for a frequency band of 3 GHz or less.
なお、近年では、比誘電率が７０以上の組成物として、
Ｂ ａ −Ｔ ｉＯ＊−ＮｄｔＯ３系、およびＢａ０−
Ｔｓｏｔ−ＮｄｔＯクーＢ ＬＯｓ系（Ｄ、ＫＯＬＡＲ
，Ｓ、ＧＡＢＥＲｓ硅に、ｚ、５ｒＡｏｔ、ＥＲ，ｏ、
５ｕｖｏＲｏｖらニヨル）等が報告されている。In addition, in recent years, as a composition with a dielectric constant of 70 or more,
B a -T iO*-NdtO3 system, and Ba0-
Tsot-NdtO KuB LOs system (D, KOLAR
,S,GABERs,z,5rAot,ER,o,
5uvoRov et al.), etc. have been reported.
ところが、Ｂａ−Ｔｉｄｙ Ｎｄ＊Ｃ）ｓ系の組成物
にあっでは、比誘電率が７０以上であって、しかも周波
数温度係数が０ｐｐＩＩｌ／℃の誘電体磁器を得られな
い欠点がある。また、Ｂ ａｏ Ｔ ｔｏ ｔ−Ｎｄ
ｔＯ、−Ｂｉ、Ｏ，系の組成物にあっては、比誘電率が
７０以上であって、しかも、周波数温度係数がＯｐｐｍ
／ ℃の誘電体磁器を得ることはできるものの、マイク
ロ波領域での誘電損失が大きいために、Ｑ（１／ｌａｎ
δ：電気的品質因数）の高い誘電体共振器が得られない
問題点があった。However, the Ba-Tidy Nd*C)s-based composition has the disadvantage that it is not possible to obtain a dielectric ceramic having a dielectric constant of 70 or more and a frequency temperature coefficient of 0 ppIIl/°C. Also, Bao T to t-Nd
The tO, -Bi, O, system composition has a dielectric constant of 70 or more and a frequency temperature coefficient of Oppm.
Although it is possible to obtain a dielectric ceramic with a temperature of
There was a problem in that a dielectric resonator with high δ (electrical quality factor) could not be obtained.
本発明は、前記事情に鑑みてなされたもので、回路の小
型化が可能でＱが高く、しかも、共振周波数の温度係数
をＯｐｐｍ／’Ｃを中心とする正または負の範囲で任意
に設定できる上に、周波数温度係数をＯｐｐｍ７℃付近
とした場合に、約３ＧＨｚの周波数帯域での誘電損失が
極めて少ない′誘電体へ器を得ることができる組成物の
提供を目的とする。The present invention has been made in view of the above circumstances, and allows for miniaturization of the circuit, high Q, and the temperature coefficient of the resonant frequency can be arbitrarily set within a positive or negative range centered on Oppm/'C. The object of the present invention is to provide a composition capable of obtaining a dielectric material having an extremely low dielectric loss in a frequency band of approximately 3 GHz when the frequency temperature coefficient is set to Oppm around 7°C.
「問題点を解決するための手段」
本発明の誘電体磁器組成物は、前記問題点を解決するた
めに、酸化バリウムと酸化チタンと酸化ネオジウムと酸
化セリウムと酸化サマリウムと酸化ビスマスを主成分と
してなり、
その組成を一般式、−
Ｘ Ｂ ａｏ ｙ Ｔ ｉＯｔ Ｚ （（ＮｄｔＯ
ｓ）＋−ｕ −ｖ（Ｃｅｔｏ ４）Ｌｌ （Ｓ ｌｔｏ
３）Ｖ ）−ｖ Ｂ ｔｗｏ Ｓと表したときに、
組成比Ｘ ＋’／ ＊Ｚ ＋Ｗ ＊ｕ ＋ｖをモル分率
で０．１２≦Ｘ≦０．１６５
０．６６≦ｙ≦０６７０
０．１３≦２≦０．１７５
０．０１５≦、≦０．０３５
０≦Ｕ≦０，４０
０≦７≦０．６０
（但しｘ＋ ｙ＋ ｚ＋ ｗ＝１）
の範囲とした誘電体磁器組成物に対し、酸化鉄（Ｆｅｔ
Ｏｓ）を２．５重量％以下の範囲で添加してなるもので
ある。"Means for Solving the Problems" In order to solve the above problems, the dielectric ceramic composition of the present invention contains barium oxide, titanium oxide, neodymium oxide, cerium oxide, samarium oxide, and bismuth oxide as main components. The composition is given by the general formula, −X Bao y TiOt Z ((NdtO
s)+-u-v(Ceto 4)Ll(S lto
3) When expressed as V)-v B two S, the composition ratio X +'/ *Z +W *u +v is expressed as a mole fraction of 0.12≦X≦0.165 0.66≦y≦0670 0. 13≦2≦0.175 0.015≦, ≦0.035 0≦U≦0,40 0≦7≦0.60 (however, x+ y+ z+ w=1) , iron oxide (Fet
Os) is added in an amount of 2.5% by weight or less.
本発明において、酸化バリウムと酸化チタンと酸化ネオ
ジウムと酸化ビスマスの含有量を前記範囲に限定したの
は、前記範囲外では比誘電率が低下オ＾か−すｔ−は−
溪雷塙牛が増加オスか−すｔ−は、周波数温度係数がプ
ラス側で太き（なりすぎるためである。また、酸化セリ
ウムと酸化サマリウムの含有量を前記範囲に限定したの
は、前記範囲より多く含有させた場合に誘電損失が増加
するためである。更に、酸化鉄の添加量を前記範囲とし
たのは、この範囲で酸化鉄を添加することによって誘電
損失を減少させた上で周波数温度係数をマイナス側にシ
フトすることができるためであるが、前記範囲を越える
場合、誘電損失が増加して比誘電率も減少するために目
的の特性が得られない。In the present invention, the content of barium oxide, titanium oxide, neodymium oxide, and bismuth oxide is limited to the above range because outside the above range, the relative permittivity decreases.
This is because the frequency temperature coefficient of the increasing number of male calves in Xileyihan is too thick on the positive side.Also, the content of cerium oxide and samarium oxide was limited to the above range. This is because the dielectric loss increases if the content exceeds the range.Furthermore, the reason why the amount of iron oxide added is set in the above range is that by adding iron oxide within this range, the dielectric loss is reduced. This is because the frequency temperature coefficient can be shifted to the negative side, but if it exceeds the above range, the dielectric loss increases and the dielectric constant decreases, making it impossible to obtain the desired characteristics.
「作用」
酸化バリウムと酸化チタンと酸化ネオジウムと酸化セリ
ウムと酸化サマリウムと酸化ビスマスを所定漬含有させ
、更に酸化アルミニウムを所定量添加することにより、
比誘電率が７０以上で、かつ、３ＧＨｚでの誘電損失を
８ＸＩＯ−’以下の極めて小さな値にすることが可能に
なる。"Function" By containing barium oxide, titanium oxide, neodymium oxide, cerium oxide, samarium oxide, and bismuth oxide in a predetermined amount, and further adding a predetermined amount of aluminum oxide,
It becomes possible to have a dielectric constant of 70 or more and an extremely small dielectric loss of 8XIO-' or less at 3 GHz.
「実施例Ｉ」
出発原料として炭酸バリウム（ＢａＣｏｓ）と酸化チタ
ン（Ｔ ｉｏ ｙ）と酸化ネオジウム（ＮｄｔＯｓ）と
酸化セリウム（Ｃｅｏ ｚ）と酸化サマリウム（Ｓ ｍ
ｔｏ ３）と酸化ビスマス（ＢＬＯｔ）、および、添加
成分として酸化鉄（Ｆ ｅｔｏ ３）を使用し、これら
を所定の組成になるように秤量し、めのうボールを備え
たボールミル装置で湿式混合を行った。"Example I" Barium carbonate (BaCos), titanium oxide (T io y), neodymium oxide (NdtOs), cerium oxide (Ceo z), and samarium oxide (S m
to 3), bismuth oxide (BLOt), and iron oxide (F eto 3) as an additive component, these were weighed to have a predetermined composition, and wet mixed using a ball mill device equipped with an agate ball. Ta.
この混合物を乾燥した後に、空気中で１１００゜℃の温
度で５時間の仮焼成を行った後に、前記ボールミル装置
で湿式粉砕を行った。After drying this mixture, it was pre-calcined in air at a temperature of 1100° C. for 5 hours, and then wet-pulverized using the ball mill.
こうして得られた粉末をポリビニルアルコール系のバイ
ンダーを添加して造粒し、５０メツシユのふるいを通し
て整粒した。この整粒粉体に２０００ ｋｇ／ ｃｍ″
の圧力で乾式プレス成形を施し、直径１６ｍｍ、厚さ約
１０ｍｍの円柱状の成形体を得た。The powder thus obtained was granulated by adding a polyvinyl alcohol binder and sized through a 50-mesh sieve. 2000 kg/cm'' to this sized powder
Dry press molding was carried out at a pressure of 1.5 mm to obtain a cylindrical molded body with a diameter of 16 mm and a thickness of about 10 mm.
これら成形体を空気中で１２５０〜１３５０℃の温度で
２時間焼成して誘電体磁器試料Ｎｏｌ〜Ｎｏ２２を得た
。These molded bodies were fired in air at a temperature of 1250 to 1350° C. for 2 hours to obtain dielectric ceramic samples No. 1 to No. 22.
前記誘電体磁器試料Ｎｏ１＝Ｎｏ２２の各端面を研摩し
、ＴＥモード（ｔｒａｎｓｖｅｒｓｅ ｅｌｅｃｔｒｉ
ｃ ｍｏｄｅ）の誘電体共振器とするとともに、ハッキ
・コールマン（Ｈａｋｋｉ −Ｃｏｌｅｎ＋ａｎ）法に
よって約３ＧＨｚにおける比誘電率（εｒ）と誘電損失
（ｔａｎδ）を測定するとともに、共振周波数における
温度係数（τｆ）を−４０℃〜７０℃の範囲で測定した
。Each end face of the dielectric ceramic samples No. 1 and No. 22 was polished and subjected to TE mode (transverse electric
c mode) dielectric resonator, and measured the relative dielectric constant (εr) and dielectric loss (tanδ) at approximately 3 GHz using the Hakki-Colen method, and measured the temperature coefficient (τf) at the resonant frequency. was measured in the range of -40°C to 70°C.
その結果を第１表と第２表に示す。なお、第１表に示す
試料Ｎｏ１−Ｎｏ１３は本発明で限定した組成を有する
誘電体磁器試料であり、第２表に示す試料Ｎｏ１４〜Ｎ
ｏ２２は本発明で限定した範囲外の組成の誘電体磁器試
料である。The results are shown in Tables 1 and 2. Note that samples No. 1 to No. 13 shown in Table 1 are dielectric ceramic samples having compositions limited in the present invention, and samples No. 14 to No. 1 shown in Table 2 are dielectric ceramic samples having compositions limited in the present invention.
o22 is a dielectric ceramic sample with a composition outside the range defined in the present invention.
（以下、余白）
第１表 （本発明例）
第２表 （比較例）
以下に、第１表に示す各試料で得られた特性と第２表に
示す各試料で得られた特性を比較して本発明の成分限定
理由について説明する。(Hereinafter, blank spaces) Table 1 (Example of the present invention) Table 2 (Comparative example) Below, the characteristics obtained with each sample shown in Table 1 and the characteristics obtained with each sample shown in Table 2 are compared. The reasons for limiting the components of the present invention will now be explained.
第１表の試料Ｎｏ４とＮｏ５は、組成比Ｘと２を本発明
で限定した範囲（０，１２≦Ｘ≦０．１６５．０、Ｉ３
≦２≦０．１７５）の上限と下限に設定し、他の組成比
を本発明で限定した範囲内に設定した試料であるのに対
し、第２表の試料Ｎｏｔ ６とＮ。Samples No. 4 and No. 5 in Table 1 have composition ratios X and 2 within the range limited by the present invention (0,12≦X≦0.165.0, I3
≦2≦0.175), and the other composition ratios were set within the ranges defined by the present invention, whereas Samples No. 6 and N in Table 2.
１７は組成比Ｘと２を本発明で限定した範囲外に設定し
た試料である。試料Ｎｏ４とＮｏ５は、比誘電率が高く
、誘電損失も少ないが、試料Ｎｏｌ Ｂとは誘電損失が
大きく、試料Ｎｏｌ ９は比誘電率が低く誘電損失も大
きくなっている。Sample No. 17 is a sample in which the composition ratios X and 2 are set outside the range defined by the present invention. Samples No. 4 and No. 5 have a high dielectric constant and a small dielectric loss, but sample No. B has a large dielectric loss, and sample No. 9 has a low dielectric constant and a large dielectric loss.
従って組成比Ｘと２について本発明で限定した範囲が・
適切であることが明らかとなった。Therefore, the range limited in the present invention for the composition ratios X and 2 is
It turned out to be appropriate.
第１表の試料Ｎｏ６とＮｏ７は、組成比ｙを本発明で限
定した範囲（０，６６≦ｙ≦０．７０）の下限と上限に
設定し、他の組成比を本発明で限定した範囲内に設定し
た試料であり、第２表の試料Ｎ。For samples No. 6 and No. 7 in Table 1, the composition ratio y was set to the lower and upper limits of the range limited by the present invention (0.66≦y≦0.70), and the other composition ratios were set to the range limited by the present invention. Sample N in Table 2.
！８とＮｏｌ ９は組成比ｙを本発明で限定した範囲外
に設定した試料である。試料Ｎｏ６とＮｏ７は、比誘電
率が高く誘電損失も少ないが、試料Ｎｏ１８は誘電損失
が大きく、試料Ｎｏｌ ９は温度係数が大きくなり過ぎ
ている。 。! No. 8 and No. 9 are samples in which the composition ratio y was set outside the range defined by the present invention. Samples No. 6 and No. 7 have a high dielectric constant and a small dielectric loss, but sample No. 18 has a large dielectric loss, and sample No. 9 has an excessively large temperature coefficient. .
従って組成比ｙについて本発明で限定した範囲が適切で
あることが明らかとなった。Therefore, it has become clear that the range defined by the present invention for the composition ratio y is appropriate.
第１表の試料ＮｏｌとＮｏ３は、組成比、を本発明で限
定した範囲（０，０１５≦、≦０．０３５）の下限と上
限に設定し、他の組成比を本発明で限定した範囲内に設
定した試料であり、第２表の試料Ｎｏｌ ４とＮｏｌ
５は組成比、を本発明で限定した範囲外に設定した試料
である。試料ＮｏｌとＮｏ３は比誘電率が高く誘電損失
も少ないが、試料Ｎ。For samples No. 1 and No. 3 in Table 1, the composition ratios were set to the lower and upper limits of the range limited by the present invention (0,015≦, ≦0.035), and the other composition ratios were set to the ranges limited by the present invention. Sample No. 4 and No. 4 in Table 2
Sample No. 5 is a sample in which the composition ratio was set outside the range defined by the present invention. Samples No. 1 and 3 have high dielectric constants and low dielectric loss, but sample N.
１４は温度係数が大きくなり過ぎ、試料Ｎｏｌ ５は誘
電損失が大きくなっている。Sample No. 14 has an excessively large temperature coefficient, and sample No. 5 has a large dielectric loss.
従って組成比Ｗについて本発明で限定した範囲が適切で
あることが明らかとなった。Therefore, it has become clear that the range defined in the present invention for the composition ratio W is appropriate.
第１表において試料Ｎｏ８とＮｏ９は、組成比。In Table 1, samples No. 8 and No. 9 have composition ratios.
とＶを本発明で限定した範囲Ｃｏ５ｕ≦０．４０．０≦
９≦０．６０）の下限と上限に設定し、他の組成比を本
発明で限定した範囲に設定した試料であり、第２表の試
料Ｎｏ２０とＮｏ２１は組成比。と９の一方を本発明で
限定した範囲外に設定した試料である。試料Ｎｏ８とＮ
ｏ９は比誘電率が高く誘電損失も少ないが、試料Ｎｏ２
０とＮｏ２１はいずれら誘電損失が大きくなっている。and V in the range limited by the present invention Co5u≦0.40.0≦
9≦0.60), and the other composition ratios were set within the ranges limited by the present invention. Samples No. 20 and No. 21 in Table 2 have composition ratios. This is a sample in which one of the parameters 9 and 9 was set outside the range defined by the present invention. Sample No.8 and N
o9 has a high dielectric constant and low dielectric loss, but sample No.2
Both No. 0 and No. 21 have large dielectric losses.
従って組成比。と、について本発明で限定した範囲が適
切であることが明らかとなった。Therefore, the composition ratio. It has become clear that the range defined in the present invention is appropriate for and.
第１表において試料ＮｏＩ ＯとＮｏｌ １とＮｏ１２
とＮｏｌ ３は、組成比Ｘとｙと２と、と。と、を本発
明で限定した範囲に設定し、Ｐｅｔ’３の添加量を本発
明で限定した範囲内において増減した試料であり、第２
表の試料Ｎｏ２２は、Ｆｅｔｕｓの添加量のみを本発明
で限定した範囲よりも多くした試料である。試料Ｎｏｌ
Ｏ〜Ｎｏｌ ３がいずれも優れた特性を示し、Ｆｅｔ
ｕｓの添加量の増加によって誘電損失を減少させ、周波
数温度係数をマイナス側にシフトできているのに対し、
Ｆｅｖｏｓの添加ｍが本発明の範囲より多い試料Ｎｏ２
２は誘電槽小Ｍｌ曽ｔｒｎ＋、−１’；’ρ、０．を禾
加Ｌτいない材料の誘電損失よりも大きくなってしまう
とともに、比誘電率も７０以下となっている。なお、Ｐ
ｅ５ｏ。In Table 1, samples No.I O, No. 1 and No. 12
and No. 3 has a composition ratio of X, y, and 2. and are set within the range limited by the present invention, and the amount of Pet'3 added is increased or decreased within the range limited by the present invention.
Sample No. 22 in the table is a sample in which only the amount of Fetus added was greater than the range limited by the present invention. Sample No.
O~Nol 3 all showed excellent characteristics, and Fet
By increasing the amount of us added, the dielectric loss can be reduced and the frequency temperature coefficient can be shifted to the negative side.
Sample No. 2 in which Fevos addition m is more than the range of the present invention
2 is the dielectric tank small Ml so trn+, -1';'ρ, 0. The dielectric loss becomes larger than the dielectric loss of the material without adding Lτ, and the dielectric constant is also 70 or less. In addition, P
e5o.
を添加していない試料ＮＯＩ ＯとＦｅｔｕｓを添加し
た試料Ｎｏｌ ２を比較すると誘電損失を約１５％低減
できることが判明した。Comparing the sample NOI O to which Fetus was not added and the sample No. 2 to which Fetus was added, it was found that the dielectric loss could be reduced by about 15%.
従ってＦｅ、Ｏ，の添加量について本発明で限定した範
囲が適切であることが明らかとなった。Therefore, it has become clear that the ranges defined in the present invention are appropriate for the amounts of Fe and O added.
「発明の効果」
以上説明したように本発明の誘電体磁器組成物は、酸化
バリウムと酸化チタンと酸化ネオジウムと酸化セリウム
と酸化サマリウムと酸化ビスマスを特別なモル分率で含
有させ、更に、酸化鉄を特別な重量％で添加したもので
あるため、比誘電率が７０以上で、周波数温度係数をＯ
ｐｐｍ／ ”Ｃを中心とする正と負の広い範囲で任意に
設定することができ、しかも周波数温度係数をＯｐｐｍ
／ ”Ｃ付近に設定した場合に、約３ＧＨｚで４．７Ｘ
１（１’の低い誘電損失を示し、Ｑの高い優れたもので
ある。"Effects of the Invention" As explained above, the dielectric ceramic composition of the present invention contains barium oxide, titanium oxide, neodymium oxide, cerium oxide, samarium oxide, and bismuth oxide in special molar fractions, and further contains oxidized Because it contains a special weight percent of iron, it has a dielectric constant of 70 or more and a frequency temperature coefficient of O.
It can be set arbitrarily in a wide range of positive and negative values centered on ppm/”C, and the frequency temperature coefficient can be set as
/ 4.7X at approximately 3GHz when set near C
It exhibits a low dielectric loss of 1 (1') and an excellent high Q value.
また、酸化鉄の添加によって誘電損失を約１５％低減す
ることができる。Further, dielectric loss can be reduced by about 15% by adding iron oxide.
従って本発明の誘電体磁器組成物によって、Ｑが高く、
周波数温度係数をＯｐｐｍ／ ’Ｃを中心として任意に
設定できる誘電体共振器を得ることができ、この誘電体
共振器を用いるマイクロ波用回路の小型化をなしうる効
果がある。Therefore, the dielectric ceramic composition of the present invention has a high Q,
A dielectric resonator whose frequency temperature coefficient can be set arbitrarily around Oppm/'C can be obtained, and a microwave circuit using this dielectric resonator can be miniaturized.
Claims (1)
リウムと酸化サマリウムと酸化ビスマスを主成分として
なり、 その組成を一般式、 ｘＢａＯ−ｙＴｉＯ＿２−ｚ｛（Ｎｄ＿２Ｏ＿３）＿１
＿−＿ｕ＿−＿ｖ（Ｃｅ＿２Ｏ＿４）＿ｕ（Ｓｍ＿２Ｏ
＿３）＿ｖ｝−＿ｗＢｉ＿２Ｏ＿３と表したときに、 組成比ｘ，ｙ，ｚ，ｗ，ｕ，ｖをモル分率で０．１２≦
ｘ≦０．１６５ ０．６６≦ｙ≦０．７０ ０．１３≦ｚ≦０．１７５ ０．０１５≦ｗ≦０．０３５ ０≦ｕ≦０．４０ ０≦ｖ≦０．６０ （但しｘ＋ｙ＋ｚ＋ｗ＝１） の範囲とした誘電体磁器組成物に対し、 酸化鉄を２．５重量％以下の範囲で添加してなることを
特徴とする誘電体磁器組成物。[Claims] The main components are barium oxide, titanium oxide, neodymium oxide, cerium oxide, samarium oxide, and bismuth oxide, and its composition is represented by the general formula: xBaO-yTiO_2-z{(Nd_2O_3)_1
___u_-_v(Ce_2O_4)_u(Sm_2O
_3) _v}-_wBi_2O_3 When expressed as _wBi_2O_3, the composition ratio x, y, z, w, u, v is 0.12≦ in mole fraction.
x≦0.165 0.66≦y≦0.70 0.13≦z≦0.175 0.015≦w≦0.035 0≦u≦0.40 0≦v≦0.60 (However, x+y+z+w= 1) A dielectric ceramic composition characterized in that iron oxide is added in an amount of 2.5% by weight or less to a dielectric ceramic composition in the following range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62070891A JPS63237304A (en) | 1987-03-25 | 1987-03-25 | Dielectric ceramic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62070891A JPS63237304A (en) | 1987-03-25 | 1987-03-25 | Dielectric ceramic composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63237304A true JPS63237304A (en) | 1988-10-03 |
Family
ID=13444603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62070891A Pending JPS63237304A (en) | 1987-03-25 | 1987-03-25 | Dielectric ceramic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63237304A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5264403A (en) * | 1991-09-27 | 1993-11-23 | Ngk Insulators, Ltd. | Dielectric ceramic composition containing ZnO-B2 O3 -SiO2 glass |
| EP1043288A2 (en) * | 1999-04-09 | 2000-10-11 | Murata Manufacturing Co., Ltd. | High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus |
-
1987
- 1987-03-25 JP JP62070891A patent/JPS63237304A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5264403A (en) * | 1991-09-27 | 1993-11-23 | Ngk Insulators, Ltd. | Dielectric ceramic composition containing ZnO-B2 O3 -SiO2 glass |
| US5304521A (en) * | 1991-09-27 | 1994-04-19 | Ngk Insulators, Ltd. | Dielectric ceramic composition containing ZnO-B2 O3 -SiO2 glass, method of preparing the same, and resonator and filter using the dielectric ceramic composition |
| US5350721A (en) * | 1991-09-27 | 1994-09-27 | Ngk Insulators, Ltd. | Dielectric ceramic composition containing ZNO-B203-SI02 glass, method of preparing the same, and resonator and filter using the dielectric ceramic composition |
| EP1043288A2 (en) * | 1999-04-09 | 2000-10-11 | Murata Manufacturing Co., Ltd. | High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus |
| EP1043288A3 (en) * | 1999-04-09 | 2001-03-21 | Murata Manufacturing Co., Ltd. | High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus |
| US6304157B1 (en) | 1999-04-09 | 2001-10-16 | Murata Manufacturing Co., Ltd. | High-frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus |
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