JPH0676630A - Dielectric ceramic composition for high frequency - Google Patents
Dielectric ceramic composition for high frequencyInfo
- Publication number
- JPH0676630A JPH0676630A JP4252266A JP25226692A JPH0676630A JP H0676630 A JPH0676630 A JP H0676630A JP 4252266 A JP4252266 A JP 4252266A JP 25226692 A JP25226692 A JP 25226692A JP H0676630 A JPH0676630 A JP H0676630A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- high frequency
- dielectric ceramic
- dielectric
- 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 24
- 239000000919 ceramic Substances 0.000 title claims abstract description 15
- 101100513612 Microdochium nivale MnCO gene Proteins 0.000 claims description 7
- 239000000758 substrate Substances 0.000 abstract description 5
- 230000004075 alteration Effects 0.000 abstract 1
- 239000011656 manganese carbonate Substances 0.000 abstract 1
- 235000006748 manganese carbonate Nutrition 0.000 abstract 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 abstract 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 abstract 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 229910010413 TiO 2 Inorganic materials 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 229910052573 porcelain Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910007541 Zn O Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012856 weighed raw material Substances 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
【０００１】[0001]
【産業上の利用分野】この発明は、誘電体磁器組成物に
関し、特に、マイクロ波領域などの高周波領域において
用いられる誘電体共振器や誘電体基板などの材料として
好ましい特性を有する高周波用誘電体磁器組成物に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric ceramic composition, and particularly to a high frequency dielectric having preferable characteristics as a material for a dielectric resonator or a dielectric substrate used in a high frequency region such as a microwave region. It relates to a porcelain composition.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】高周波
用誘電体磁器組成物は、マイクロ波やミリ波などの高周
波領域用の誘電体共振器や誘電体基板の材料として広く
利用されている。そして、この種の高周波用誘電体磁器
組成物の一つであるＢａＯ−ＴｉＯ2系の高周波用誘電
体磁器組成物としては、例えば、特公平１−３７８０
７号公報に開示されている（ＢａＯ−ＴｉＯ2）＋Ｚｎ
Ｏ系の材料、特開昭６１−１０８０６号公報に開示さ
れている（ＢａＯ−ＴｉＯ2）＋ＺｎＯ＋Ｔａ2Ｏ5系材
料、特開昭６２−１６５８０６号公報に開示されてい
る（ＢａＯ−ＴｉＯ2）＋Ｂａ（Ｎｉ1/3Ｔａ2/3）Ｏ3系
材料などが知られている。2. Description of the Related Art High frequency dielectric porcelain compositions have been widely used as materials for dielectric resonators and dielectric substrates for high frequencies such as microwaves and millimeter waves. And, as a BaO—TiO 2 -based high frequency dielectric ceramic composition which is one of this type of high frequency dielectric ceramic composition, for example, Japanese Patent Publication No. 1-3780 can be used.
Disclosed in 7 JP (BaO-TiO 2) + Zn
O-based materials, (BaO—TiO 2 ) + ZnO + Ta 2 O 5 -based materials disclosed in JP-A-61-180606, and JP-A-62-165806 (BaO—TiO 2 ). + Ba (Ni 1/3 Ta 2/3 ) O 3 based materials and the like are known.
【０００３】しかし、近年では、限られた周波数帯域を
有効に利用するために、使用する周波数帯の狭帯域化が
強く望まれるようになり、上記従来の高周波用誘電体磁
器組成物をもってしても、Ｑ値や周波数の温度安定性な
どに関し、要求される特性を必ずしも満足することがで
きない場合が生じるに至っている。However, in recent years, in order to effectively utilize a limited frequency band, it has been strongly desired to narrow the frequency band to be used, and with the above-mentioned conventional high frequency dielectric ceramic composition. However, there are cases in which required characteristics cannot always be satisfied in terms of Q value and temperature stability of frequency.
【０００４】そのため、高周波用誘電体材料に関し、上
記従来の高周波用誘電体磁器組成物よりもさらに高いＱ
値を有し、かつ周波数の温度安定性に優れた材料が必要
とされるようになっている。Therefore, the high-frequency dielectric material has a higher Q than the conventional high-frequency dielectric ceramic composition.
There is a need for a material having a value and excellent temperature frequency stability.
【０００５】この発明は、上記問題点を解決するもので
あり、高いＱ値を有し、かつ共振周波数の温度安定性に
優れた、誘電体共振器や誘電体基板などの材料として好
ましい特性を有する誘電体磁器を得ることが可能な高周
波用誘電体磁器組成物を提供することを目的とする。The present invention solves the above problems, and has preferable characteristics as a material such as a dielectric resonator or a dielectric substrate, which has a high Q value and is excellent in temperature stability of the resonance frequency. It is an object of the present invention to provide a high frequency dielectric ceramic composition capable of obtaining the dielectric ceramic.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、この発明の高周波用誘電体磁器組成物は、 ＢａＯ−ｘＴｉＯ2 で表され、かつｘが、 ３．９≦ｘ≦４．１ の範囲にある組成物１００重量部に対して、ＭｎＣ
Ｏ3，Ｔａ2Ｏ5，ＺｎＯ，ＮｉＯをそれぞれ、 ＭｎＣＯ3 ： ０．５重量部以下 Ｔａ2Ｏ5 ： ２．０重量部以下 ＺｎＯ ：２５．０重量部以下 ＮｉＯ ： １．２重量部以下 の割合で添加したことを特徴とする。In order to achieve the above object, the high frequency dielectric ceramic composition of the present invention is represented by BaO-xTiO 2 , and x is 3.9≤x≤4.1. 100 parts by weight of the composition within the range of MnC
O 3 , Ta 2 O 5 , ZnO, and NiO respectively, MnCO 3 : 0.5 parts by weight or less Ta 2 O 5 : 2.0 parts by weight or less ZnO: 25.0 parts by weight or less NiO: 1.2 parts by weight or less Is added in a ratio of.
【０００７】[0007]
【実施例】以下、この発明の実施例を比較例とともに示
して、発明の特徴をさらに詳しく説明する。EXAMPLES Hereinafter, the features of the present invention will be described in more detail by showing examples of the present invention together with comparative examples.
【０００８】まず、原料として、高純度のＢａＣＯ3，
ＴｉＯ2，ＭｎＣＯ3，Ｔａ2Ｏ5，ＺｎＯ，ＮｉＯを用意
し、これらの原料を、表１に示すような組成比になるよ
うに秤取する。First, as a raw material, high-purity BaCO 3 ,
TiO 2 , MnCO 3 , Ta 2 O 5 , ZnO, and NiO are prepared, and these raw materials are weighed so that the composition ratios shown in Table 1 are obtained.
【０００９】[0009]
【表１】 [Table 1]
【００１０】なお、表１において、試料番号に＊印を付
したものは、この発明の範囲外の比較例を示し、その他
のものは、この発明の範囲内の実施例を示す。In Table 1, the sample numbers marked with * indicate comparative examples outside the scope of the present invention, and the others indicate examples within the scope of the present invention.
【００１１】次に、秤取した原料を水とともにボールミ
ルに入れ、１６時間湿式混合して混合物を得る。それか
ら、この混合物を乾燥した後、１０００〜１２００℃で
３時間仮焼して仮焼体を得る。Next, the weighed raw materials are put in a ball mill together with water and wet mixed for 16 hours to obtain a mixture. Then, this mixture is dried and then calcined at 1000 to 1200 ° C. for 3 hours to obtain a calcined body.
【００１２】この仮焼体を、水及び有機バインダーとと
もにボールミルに入れて１６時間湿式混合して粉砕す
る。次に、得られた仮焼体粉砕物を乾燥し、５０メッシ
ュのふるいを通して粒度調整することにより、高周波用
誘電体磁器組成物の粉末（原料粉末）を得る。This calcined body is put in a ball mill together with water and an organic binder, wet-mixed for 16 hours, and ground. Next, the obtained pulverized product of the calcined body is dried, and the particle size is adjusted through a 50-mesh sieve to obtain a powder (raw material powder) of the high-frequency dielectric ceramic composition.
【００１３】そして、この原料粉末を、約２５００ｋｇ
／cm2の圧力で、直径１２mm，厚さ５．５mmの円板状に
加圧成形した後、円板状の成形体を１２００〜１３００
℃で４時間焼成することにより高周波用誘電体磁器（試
料）を得た。Approximately 2500 kg of this raw material powder
After pressure-molding into a disk shape with a diameter of 12 mm and a thickness of 5.5 mm at a pressure of / cm 2, the disk-shaped molded body is 1200 to 1300.
A high frequency dielectric ceramic (sample) was obtained by firing at 4 ° C. for 4 hours.
【００１４】このようにして得られた試料について、周
波数７ＧＨｚにおける比誘電率εr、Ｑ値、共振周波数
の温度係数τｆ（ppm／℃）、及び共振周波数の温度変
化率の２次微係数βを測定した。For the sample thus obtained, the relative permittivity ε r at a frequency of 7 GHz, the Q value, the temperature coefficient τf (ppm / ° C.) of the resonance frequency, and the second derivative β of the temperature change rate of the resonance frequency β. Was measured.
【００１５】なお、β値は、共振周波数の温度変化率Δ
ｆ／ｆ0と測定温度から下記の式(1)により算出した値で
あり、Δｆ／ｆ0を温度に対してプロットしたときの二
次曲線の曲率を表している。 Δｆ／ｆ0＝α（Ｔ−２５）＋β（Ｔ−２５）2 (1) 但し、Ｔ ： 各測定温度 ｆ0 ： ２５℃における共振周波数 Δｆ ： 各測定温度における共振周波数と２５℃の共振
周波数の差The β value is the temperature change rate Δ of the resonance frequency.
It is a value calculated by the following formula (1) from f / f 0 and the measured temperature, and represents the curvature of the quadratic curve when Δf / f 0 is plotted against temperature. Δf / f 0 = α (T-25) + β (T-25) 2 (1) where T: each measurement temperature f 0 : resonance frequency at 25 ° C Δf: resonance frequency at each measurement temperature and resonance frequency at 25 ° C Difference
【００１６】なお、β値が小さいほど、共振周波数の温
度変化率が直線に近づき、温度安定性が向上しているこ
とを示す。It should be noted that the smaller the β value, the closer the temperature change rate of the resonance frequency becomes to a straight line, indicating that the temperature stability is improved.
【００１７】比誘電率εr 、Ｑ値、共振周波数の温度係
数τｆ（ppm／℃）、及び共振周波数の温度変化率の２
次微係数βについての測定結果を表１に示す。The relative permittivity ε r , the Q value, the temperature coefficient τf (ppm / ° C.) of the resonance frequency, and the temperature change rate of the resonance frequency are 2
Table 1 shows the measurement results of the second derivative β.
【００１８】表１より、この実施例の高周波用誘電体磁
器組成物は、７ＧＨｚという高周波領域で、比誘電率ε
r 、Ｑ値、共振周波数の温度係数τｆ（ppm／℃）、及
び共振周波数の温度変化率の２次微係数βの各特性につ
いて、概ね良好な結果が得られていることがわかる。From Table 1, the high frequency dielectric ceramic composition of this example has a relative dielectric constant ε in the high frequency region of 7 GHz.
It can be seen that generally good results are obtained for the respective characteristics of r , Q value, temperature coefficient τf (ppm / ° C) of resonance frequency, and second-order differential coefficient β of temperature change rate of resonance frequency.
【００１９】なお、表１より、ＮｉＯの添加量が１．２
０重量部以下の範囲おいては、ＮｉＯの添加量が増える
と、高いＱ値を保ちながらβの絶対値が小さくなってい
ることがわかる。このように、ＢａＯ−ｘＴｉＯ2１０
０重量部に対して１．２０重量部以下の範囲内でＮｉＯ
を添加することにより、共振周波数の温度変化率を直線
に近づける、すなわち、温度安定性を向上させることが
できる。From Table 1, the amount of NiO added is 1.2.
It can be seen that in the range of 0 parts by weight or less, as the amount of NiO added increases, the absolute value of β decreases while maintaining a high Q value. Thus, BaO-xTiO 2 10
NiO within 1.20 parts by weight or less relative to 0 parts by weight
By adding, the rate of temperature change of the resonance frequency can be approximated to a straight line, that is, the temperature stability can be improved.
【００２０】次に、各成分の組成範囲を限定した理由に
ついて説明する。Next, the reason for limiting the composition range of each component will be described.
【００２１】［ＢａＯとＴｉＯ2の割合］主成分である
ＢａＯとＴｉＯ2の割合については、式：ＢａＯ−ｘＴ
ｉＯ2におけるｘが３．９≦ｘ≦４．１の範囲から外れ
ると、表１のNo.７のように、Ｑ値が低下するため、Ｘ
の値は３．９≦ｘ≦４．１の範囲にあることが好まし
い。[0021] The proportion of BaO and TiO 2, which is a main component [BaO and percentage of TiO 2] has the formula: BaO-xT
When x in iO 2 deviates from the range of 3.9 ≦ x ≦ 4.1, as shown in No. 7 of Table 1, the Q value decreases, so X
The value of is preferably in the range of 3.9 ≦ x ≦ 4.1.
【００２２】［ＮｉＯ］上述のように、ＮｉＯを添加す
ることにより、Ｑ値を高く保持しつつβの絶対値を小さ
くすることができるが、ＢａＯ−ｘＴｉＯ2１００重量
部に対してＮｉＯの添加量が１．２０重量部を越えると
表１のNo.９，１０のように、Ｑ値が低下するため、Ｎ
ｉＯの添加量は、１．２０重量部以下であることが好ま
しい。[NiO] As described above, by adding NiO, the absolute value of β can be reduced while keeping the Q value high. However, the addition of NiO to 100 parts by weight of BaO-xTiO 2 is added. When the amount exceeds 1.20 parts by weight, the Q value decreases as shown in Table 1 Nos. 9 and 10, so N
The amount of iO added is preferably 1.20 parts by weight or less.
【００２３】［Ｔａ2Ｏ5及びＺｎＯ］Ｔａ2Ｏ5の添加量
が２．０重量部を越えると誘電率εｒ及びＱ値が低下す
る。また、ＺｎＯの添加量が２５．０重量部を越えた場
合にも誘電率εｒ及びＱ値が低下する。したがって、Ｔ
ａ2Ｏ5は２．０重量部以下、ＺｎＯは２５．０重量部以
下であることが好ましい。If the amount of [Ta 2 O 5 and ZnO] Ta 2 O 5 added exceeds 2.0 parts by weight, the dielectric constant εr and the Q value decrease. Further, when the added amount of ZnO exceeds 25.0 parts by weight, the dielectric constant εr and the Q value decrease. Therefore, T
It is preferable that a 2 O 5 is 2.0 parts by weight or less and ZnO is 25.0 parts by weight or less.
【００２４】［ＭｎＣＯ3］ＭｎＣＯ3については、その
添加量が０．５重量部を越えるとＱ値が低下する傾向が
ある。したがって、ＭｎＣＯ3は、０．５重量部以下の
範囲で添加することが好ましい。When [MnCO 3 ] MnCO 3 is added in an amount of more than 0.5 parts by weight, the Q value tends to decrease. Therefore, MnCO 3 is preferably added in the range of 0.5 parts by weight or less.
【００２５】[0025]
【発明の効果】上述のように、この発明の高周波用誘電
体磁器組成物は、ＢａＯ−ｘＴｉＯ2で表され、かつｘ
が、３．９≦ｘ≦４．１の範囲にある組成物１００重量
部に対して、０．５重量部以下のＭｎＣＯ3と、２．０
重量部以下のＴａ2Ｏ5と、２５．０重量部以下のＺｎＯ
と、１．２重量部以下のＮｉＯを添加するようにしてい
るので、マイクロ波領域などの高周波帯域において高い
Ｑ値を有するとともに、共振周波数の温度安定性に優れ
た、誘電体共振器や誘電体基板などの材料として好まし
い特性を有する誘電体磁器を得ることが可能な高周波用
誘電体磁器組成物を得ることができる。As described above, the high frequency dielectric ceramic composition of the present invention is represented by BaO-xTiO 2 and x
Is 0.5 part by weight or less of MnCO 3 with respect to 100 parts by weight of the composition in the range of 3.9 ≦ x ≦ 4.1, and 2.0
Less than 2 parts by weight of Ta 2 O 5 and less than 25.0 parts by weight of ZnO
In addition, since 1.2 parts by weight or less of NiO is added, a dielectric resonator or a dielectric resonator having a high Q value in a high frequency band such as a microwave region and having excellent temperature stability of a resonance frequency. It is possible to obtain a high frequency dielectric porcelain composition capable of obtaining a dielectric porcelain having preferable properties as a material for a body substrate or the like.
Claims (1)
Ｏ3，Ｔａ2Ｏ5，ＺｎＯ，ＮｉＯをそれぞれ、 ＭｎＣＯ3 ： ０．５重量部以下 Ｔａ2Ｏ5 ： ２．０重量部以下 ＺｎＯ ：２５．０重量部以下 ＮｉＯ ： １．２重量部以下 の割合で添加したことを特徴とする高周波用誘電体磁器
組成物。1. MnC based on 100 parts by weight of a composition represented by BaO—xTiO 2 and x in the range of 3.9 ≦ x ≦ 4.1.
O 3 , Ta 2 O 5 , ZnO, and NiO respectively, MnCO 3 : 0.5 parts by weight or less Ta 2 O 5 : 2.0 parts by weight or less ZnO: 25.0 parts by weight or less NiO: 1.2 parts by weight or less The dielectric ceramic composition for high frequencies, characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25226692A JP3443847B2 (en) | 1992-08-26 | 1992-08-26 | High frequency dielectric ceramic composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25226692A JP3443847B2 (en) | 1992-08-26 | 1992-08-26 | High frequency dielectric ceramic composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0676630A true JPH0676630A (en) | 1994-03-18 |
| JP3443847B2 JP3443847B2 (en) | 2003-09-08 |
Family
ID=17234850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25226692A Expired - Fee Related JP3443847B2 (en) | 1992-08-26 | 1992-08-26 | High frequency dielectric ceramic composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3443847B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6429164B1 (en) * | 1999-10-28 | 2002-08-06 | Murata Manufacturing Co., Ltd. | High frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication system |
| JP2005041727A (en) * | 2003-07-25 | 2005-02-17 | Murata Mfg Co Ltd | Dielectric ceramic composition for high frequency, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus |
-
1992
- 1992-08-26 JP JP25226692A patent/JP3443847B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6429164B1 (en) * | 1999-10-28 | 2002-08-06 | Murata Manufacturing Co., Ltd. | High frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication system |
| JP2005041727A (en) * | 2003-07-25 | 2005-02-17 | Murata Mfg Co Ltd | Dielectric ceramic composition for high frequency, dielectric resonator, dielectric filter, dielectric duplexer, and communication apparatus |
| JP4691876B2 (en) * | 2003-07-25 | 2011-06-01 | 株式会社村田製作所 | High frequency dielectric ceramic composition, dielectric resonator, dielectric filter, dielectric duplexer, and communication device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3443847B2 (en) | 2003-09-08 |
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