JP2508359B2 - Dielectric porcelain composition - Google Patents
Dielectric porcelain compositionInfo
- Publication number
- JP2508359B2 JP2508359B2 JP2118002A JP11800290A JP2508359B2 JP 2508359 B2 JP2508359 B2 JP 2508359B2 JP 2118002 A JP2118002 A JP 2118002A JP 11800290 A JP11800290 A JP 11800290A JP 2508359 B2 JP2508359 B2 JP 2508359B2
- Authority
- JP
- Japan
- Prior art keywords
- resonance frequency
- dielectric
- relative permittivity
- dielectric ceramic
- temperature coefficient
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は誘電体磁器組成物に関し、特にたとえば高
周波用誘電体共振器や温度補償用コンデンサなどに用い
られる誘電体磁器組成物に関する。Description: TECHNICAL FIELD The present invention relates to a dielectric ceramic composition, and more particularly to a dielectric ceramic composition used in, for example, a high frequency dielectric resonator or a temperature compensating capacitor.
（従来技術） 従来のマイクロ波用の誘電体材料や温度補償用コンデ
ンサ材料の分野では、たとえば比誘電率εｒが20〜100
の範囲で0ppm/℃の温度係数を有する温度安定性に優れ
た誘電体磁器を得ることができる材料が知られている。(Prior Art) In the field of conventional dielectric materials for microwaves and capacitor materials for temperature compensation, for example, the relative permittivity ε r is 20 to 100.
There is known a material capable of obtaining a dielectric porcelain having a temperature coefficient of 0 ppm / ° C. and excellent temperature stability in the range.
また、εｒ＞100の材料として、たとえばSr−Ca−TiO
2系の材料がある。このような材料を用いた誘電体磁器
は、比較的比誘電率εｒが大きく、温度特性が良好であ
る。その代表的な組成物としては、たとえば（Sr0.6,Ca
0.4）TiO3があり、これを用いた誘電体磁器は、εｒ＝2
40、共振周波数の温度係数｜τ（ｆ）｜＜600ppm/℃の
特性を持っている。Further, as a material having ε r > 100, for example, Sr-Ca-TiO 2 is used.
There are two types of materials. The dielectric ceramic using such a material has a relatively large relative permittivity ε r and good temperature characteristics. A typical composition thereof is, for example, (Sr 0.6 , Ca
0.4 ) TiO 3 and the dielectric porcelain using this has ε r = 2
40, Resonance frequency temperature coefficient | τ (f) | <600ppm / ° C.
（発明が解決しようとする課題） しかしながら、このような従来の誘電体磁器組成物を
用いた誘電体磁器では、誘電損失が大きく、またＱ値や
比誘電率および共振周波数の温度特性が十分満足できる
ものとはいえない。(Problems to be Solved by the Invention) However, in a dielectric ceramic using such a conventional dielectric ceramic composition, the dielectric loss is large and the temperature characteristics of Q value, relative permittivity and resonance frequency are sufficiently satisfied. Not what you can do.
それゆえに、この発明の主たる目的は、従来のものに
比べて比誘電率および共振周波数の温度特性に優れ、大
きな比誘電率と大きなＱ値を有する誘電体磁器を得るこ
とができる、誘電体磁器組成物を提供することである。Therefore, a main object of the present invention is to obtain a dielectric ceramic which is superior in temperature characteristics of relative permittivity and resonance frequency and has a large relative permittivity and a large Q value as compared with the conventional one. It is to provide a composition.
（課題を解決するための手段） この発明は、SrO−CaO−TiO2−ZrO2系の誘電体磁器組
成物であって、（Srx,Ca1-x）（Zry,Ti1-y）O3と表した
とき、ｘおよびｙが、0.59≦ｘ≦0.65、０＜ｙ≦0.1の
範囲にある、誘電体磁器組成物である。(Means for Solving the Problems) The present invention is a SrO—CaO—TiO 2 —ZrO 2 -based dielectric ceramic composition, wherein (Sr x , Ca 1-x ) (Zr y , Ti 1-y ) when expressed as O 3, x and y is in the range of 0.59 ≦ x ≦ 0.65,0 <y ≦ 0.1, a dielectric ceramic composition.
また、上述の（Srx,Ca1-x）（Zry,Ti1-y）O3の重量10
0に対して、０＜ｚ＜3.0の範囲となるように、ｚ重量％
のSiO2を添加してもよい。In addition, the weight of (Sr x , Ca 1-x ) (Zr y , Ti 1-y ) O 3 is 10
With respect to 0, z% by weight should be in the range of 0 <z <3.0
SiO 2 may be added.
（発明の効果） この発明によれば、従来のものに比べて比誘電率およ
び共振周波数の温度特性に優れ、かつ大きな比誘電率と
大きなＱ値を有する誘電体磁器を得ることができる。し
たがって、マイクロ波用誘電体共振器材料や温度補償用
コンデンサ材料として有用であり、その工業的利用価値
は大きい。(Effect of the Invention) According to the present invention, it is possible to obtain a dielectric ceramic having excellent relative permittivity and temperature characteristics of resonance frequency, a large relative permittivity, and a large Q value as compared with the conventional one. Therefore, it is useful as a dielectric resonator material for microwaves and a capacitor material for temperature compensation, and its industrial utility value is great.
この発明の上述の目的，その他の目的，特徴および利
点は、以下の実施例の詳細な説明から一層明らかとなろ
う。The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments below.
（実施例） まず、素原料として、SrCO3,CaCO3の炭酸塩またはSr
O,CaOの酸化物とZrO2,SiO2とを準備した。そして、これ
らの原料を（Srx,Ca1-x）（Zry,Ti1-y）O3の式におい
て、ｘおよびｙが別表の値となるように秤量した。ま
た、（Srx,Ca1-x）（Zry,Ti1-y）O3の重量100に対し
て、別表に示すように、SiO2をｚ重量％添加した。(Example) First, as a raw material, SrCO 3 , CaCO 3 carbonate or SrCO 3
O, CaO oxides and ZrO 2 , SiO 2 were prepared. Then, these raw materials were weighed so that x and y in the formula of (Sr x , Ca 1-x ) (Zr y , Ti 1-y ) O 3 have the values in the attached table. Further, as shown in the attached table, z weight% of SiO 2 was added to 100 weight of (Sr x , Ca 1-x ) (Zr y , Ti 1-y ) O 3 .
秤量した素原料を混合粉砕し、脱水したのち1100℃で
２時間仮焼し、仮焼物を得た。得られた仮焼物にバイン
ダを加えて混合粉砕，脱水，造粒，成形を行ったのち、
1280〜1330℃で焼成して、直径10mm、厚さ5mmの誘電体
磁器のユニットを得た。The weighed raw materials were mixed and pulverized, dehydrated and then calcined at 1100 ° C. for 2 hours to obtain a calcined product. After adding a binder to the obtained calcined product, mixing and grinding, dehydration, granulation, and molding,
Firing was performed at 1280 to 1330 ° C. to obtain a dielectric ceramic unit having a diameter of 10 mm and a thickness of 5 mm.
得られたユニットについて、Ｑ値の正確な評価が可能
なマイクロ波帯で、比誘電率εr,Q値，共振周波数の温
度係数τ（ｆ）の測定を行った。そして、その結果を別
表に示した。なお、共振周波数の温度係数τ（ｆ）は、
比誘電率の温度係数τ（ε）と熱膨張係数αとを用い
て、次式で表される材料定数である。With respect to the obtained unit, the relative permittivity ε r , the Q value, and the temperature coefficient τ (f) of the resonance frequency were measured in the microwave band where the Q value can be accurately evaluated. The results are shown in the attached table. The temperature coefficient τ (f) of the resonance frequency is
It is a material constant expressed by the following equation using the temperature coefficient τ (ε) of the relative permittivity and the thermal expansion coefficient α.
τ（ｆ）＝（−1/2）τ（ε）−α 別表には、55℃および85℃における共振周波数を測定
し、それぞれの25℃における共振周波数に対する共振周
波数の温度係数τ（ｆ）25-55およびτ（ｆ）25-85を示
した。τ (f) = (-1/2) τ (ε) -α In another table, the resonance frequencies at 55 ° C and 85 ° C are measured, and the temperature coefficient τ (f) of the resonance frequency for each resonance frequency at 25 ° C. 25-55 and τ (f) 25-85 are shown.
次に、（Srx,Ca1-x）（ZryTi1-y）O3のx,yおよびSiO2
の添加量ｚを限定した理由について説明する。Next, (Sr x , Ca 1-x ) (Zr y Ti 1-y ) O 3 x, y and SiO 2
The reason why the addition amount z of is limited will be described.
試料番号１および２のように、ｘ＜0.59では、共振周
波数の温度係数τ（ｆ）が大きくなりすぎる。As in sample numbers 1 and 2, when x <0.59, the temperature coefficient τ (f) of the resonance frequency becomes too large.
試料番号18のように、ｘ＞0.65では、Ｑ値が低下し、
共振周波数の温度係数τ（ｆ）が大きくなる。As in sample number 18, when x> 0.65, the Q value decreases,
The temperature coefficient τ (f) of the resonance frequency becomes large.
試料番号1,3,5,8,13,15,18のように、ｙ＝０では、共
振周波数の温度係数τ（ｆ）が大きくなる。As in sample numbers 1, 3, 5, 8, 13, 15, and 18, at y = 0, the temperature coefficient τ (f) of the resonance frequency becomes large.
試料番号19のように、ｙ＞0.1では、焼結性が悪化
し、共振周波数の温度係数τ（ｆ）が大きくなる。As in Sample No. 19, when y> 0.1, the sinterability deteriorates, and the temperature coefficient τ (f) of the resonance frequency increases.
０＜ｚ＜3.0の範囲では焼結性が改善されるが、試料番
号20,21のように、ｚ≧3.0では、比誘電率εｒが低下
し、共振周波数の温度係数τ（ｆ）が大きくなる。In the range of 0 <z <3.0, the sinterability is improved, but as in sample numbers 20 and 21, when z ≧ 3.0, the relative permittivity ε r decreases and the temperature coefficient τ (f) of the resonance frequency decreases. growing.
それに対して、この発明の誘電体磁器組成物では、大
きな比誘電率とＱ値とを有し、｜τ（ｆ）｜≦500ppm/
℃の誘電体磁器を得ることができた。On the other hand, the dielectric ceramic composition of the present invention has a large relative permittivity and a Q value, and | τ (f) | ≦ 500 ppm /
It was possible to obtain a dielectric porcelain of ℃.
特に、比誘電率εｒが100以上の材料の中では、共振
周波数の温度係数τ（ｆ）の最も小さいものが得られた
ので、マイクロ波用誘電体共振器材料や温度補償用コン
デンサ材料に利用でき、その工業的利用価値は大であ
る。In particular, among the materials having a relative permittivity ε r of 100 or more, the one having the smallest temperature coefficient τ (f) of the resonance frequency was obtained. Therefore, it is suitable for the dielectric resonator material for microwaves and the capacitor material for temperature compensation. It is available and its industrial utility value is great.
Claims (2)
物であって、（Srx,Ca1-x）（Zry,Ti1-y）O3と表したと
き、ｘおよびｙが、 0.59≦ｘ≦0.65 ０＜ｙ≦0.1 の範囲にある、誘電体磁器組成物。1. A SrO—CaO—TiO 2 —ZrO 2 -based dielectric ceramic composition represented by (Sr x , Ca 1-x ) (Zr y , Ti 1-y ) O 3 A dielectric ceramic composition in which x and y are in the range of 0.59 ≦ x ≦ 0.65 0 <y ≦ 0.1.
O3の重量100に対して、ｚ重量％のSiO2を添加し、ｚ
が、 ０＜ｚ＜3.0 の範囲にある、請求項第１項記載の誘電体磁器組成物。2. The (Sr x , Ca 1-x ) (Zr y , Ti 1-y )
With respect to 100 weight of O 3 , z weight% of SiO 2 was added, and z
The dielectric porcelain composition according to claim 1, wherein is in the range of 0 <z <3.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2118002A JP2508359B2 (en) | 1990-05-07 | 1990-05-07 | Dielectric porcelain composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2118002A JP2508359B2 (en) | 1990-05-07 | 1990-05-07 | Dielectric porcelain composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0414704A JPH0414704A (en) | 1992-01-20 |
| JP2508359B2 true JP2508359B2 (en) | 1996-06-19 |
Family
ID=14725624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2118002A Expired - Lifetime JP2508359B2 (en) | 1990-05-07 | 1990-05-07 | Dielectric porcelain composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508359B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6933256B2 (en) | 2000-02-09 | 2005-08-23 | Tdk Corporation | Dielectric ceramic composition, electronic device, and method for producing same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6572793B2 (en) | 2000-03-30 | 2003-06-03 | Tdk Corporation | Method of producing ceramic composition and method of producing electronic device |
| US6645895B2 (en) | 2000-03-30 | 2003-11-11 | Tdk Corporation | Method of producing ceramic composition and method of producing electronic device |
| CN110818409B (en) * | 2019-12-25 | 2022-03-08 | 内蒙古工业大学 | Preparation of SrZrO3And SrZrO3Ceramic material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63289710A (en) * | 1987-05-20 | 1988-11-28 | Murata Mfg Co Ltd | Nonreducible dielectric ceramic constituent |
-
1990
- 1990-05-07 JP JP2118002A patent/JP2508359B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6933256B2 (en) | 2000-02-09 | 2005-08-23 | Tdk Corporation | Dielectric ceramic composition, electronic device, and method for producing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0414704A (en) | 1992-01-20 |
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