JPS5951085B2 - dielectric porcelain material - Google Patents
dielectric porcelain materialInfo
- Publication number
- JPS5951085B2 JPS5951085B2 JP52143446A JP14344677A JPS5951085B2 JP S5951085 B2 JPS5951085 B2 JP S5951085B2 JP 52143446 A JP52143446 A JP 52143446A JP 14344677 A JP14344677 A JP 14344677A JP S5951085 B2 JPS5951085 B2 JP S5951085B2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric
- temperature
- dielectric constant
- dielectric porcelain
- porcelain material
- 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
Links
Landscapes
- Inorganic Insulating Materials (AREA)
Description
【発明の詳細な説明】
本発明は誘電体磁器材料、特にＢａＯ、ＭｇＯ、ＺｎＯ
、Ｎｂ。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to dielectric ceramic materials, particularly BaO, MgO, ZnO.
, Nb.
Ｏ゜の成分で構成される誘電体共振器などに使用される
磁器材料に関するものであり、誘電率（ε）が大きく、
無負荷Ｑが大きく、さらに共振周波数の温度安定度（τ
ｆ）の優れたマイクロ波用誘電体共振器を構成し得る誘
電体磁器材料を提供しようとするものである。従来から
、マイクロ波領域において、マイクロ波回路のインピー
ダンス整合や、誘電体共振器などに、誘電体が応用され
てきている。This relates to ceramic materials used in dielectric resonators, etc., which are composed of a component of O゜, and have a large dielectric constant (ε).
The no-load Q is large, and the temperature stability of the resonant frequency (τ
f) It is an object of the present invention to provide a dielectric ceramic material that can constitute an excellent microwave dielectric resonator. BACKGROUND ART Dielectric materials have been applied to impedance matching of microwave circuits, dielectric resonators, etc. in the microwave region.
近年、特に、マイクロ波回路の集積化の技術が進歩する
にともない、発振器の周波数の安定化などに、高誘電率
、低損失、低価格の誘電体磁器を使用して、電子機器を
小形化することが積極的に進められている。これまで、
この種の誘電体材料としては、ＢａＯ−ＴｉＯ。系磁器
、および、この元素の一部を他の元素で置換した磁器、
さらには誘電率が負の温度変化をもつＴｉＯ。と正の誘
電率の温度変化をｌもつ誘電体磁器とを組合わせたもの
を使用する場合が多い。しかし、これらは、誘電体損失
が大きかつたり、誘電率の温度変化のばらつきが大きか
つたり、あるいは共振周波数の温度安定度が大きすぎた
りするという欠点がある。In recent years, especially as the technology for integrating microwave circuits has progressed, electronic devices have been made smaller by using dielectric ceramics with high dielectric constant, low loss, and low cost to stabilize the frequency of oscillators. This is being actively pursued. Until now,
An example of this type of dielectric material is BaO-TiO. system porcelain, and porcelain in which some of these elements are replaced with other elements,
Furthermore, TiO has a negative dielectric constant that changes with temperature. In many cases, a combination of dielectric ceramic and dielectric ceramic having a positive dielectric constant temperature change l is used. However, these have drawbacks such as large dielectric loss, large variations in temperature change in dielectric constant, or too large temperature stability of resonant frequency.
また、共振周波数の温度係数を変化させようとすると、
Ｑがちぢるしく低下するなど、実用上の問題が多い。本
発明はこれらの欠点を除いたものであり、一般式３Ｂａ
Ｏ−ｘＭｇＯ・（１−ｘ）ＺｎＯ−Ｎｂ２Ｏ５でｊ表わ
される組成において、０．０１≦Ｘ≦０．９９の範囲内
にある組成の磁器材料が、優れた誘電体マイクロ波共振
器になることを見出したことにもとづくものである。Also, if you try to change the temperature coefficient of the resonant frequency,
There are many practical problems, such as a sharp drop in Q. The present invention eliminates these drawbacks, and the general formula 3Ba
In the composition represented by O-xMgO.(1-x)ZnO-Nb2O5, a ceramic material having a composition within the range of 0.01≦X≦0.99 becomes an excellent dielectric microwave resonator. This is based on the discovery of
以下、実施例にもとづいて、本発明を説明す、る。The present invention will be explained below based on Examples.
まず、ＢａＣＯ３、ＭｇＯ、ＺｎＯおよびＮｂ２Ｏ５の
出発原料を各組成に応じて秤量し、めのうボールを備え
、かつゴム内張りしたボールミルを用いて、純水ととも
に、湿式混合した。First, starting materials BaCO3, MgO, ZnO, and Nb2O5 were weighed according to each composition, and wet-mixed with pure water using a ball mill equipped with an agate ball and lined with rubber.
この混合物をボーフルミルより取り出して乾燥してから
、空気中において１１００℃で２時間仮焼した後、ボー
ルミルで湿式粉砕した。ボールミルから粉砕泥しようを
取り出し、これを乾燥した後、圧力７００ｋｇ／ｃｍ３
で直径２５ｍｍの円板に形成し、それを１４６０〜１３
６０℃の範囲内７の温度で２時間、空気中において焼成
して、下表に示す組成の誘電体磁器を得た。次に、各磁
器から、それぞれ直径５ｍｍ、厚さ２Ｍｍの寸法の円板
形磁器の試料を切出し、その共振周波数（ほぼ１１ＧＨ
ｚ）と直径から誘電率（ε）を、また帯域反射法により
無負荷Ｑ（Ｑｕ）を測定した。This mixture was taken out from the Beaufour mill, dried, calcined in air at 1100° C. for 2 hours, and then wet-pulverized in a ball mill. After taking out the crushed slurry from the ball mill and drying it, the pressure was 700 kg/cm3.
to form a disc with a diameter of 25 mm, and then
It was fired in air at a temperature of 7 within the range of 60° C. for 2 hours to obtain dielectric ceramics having the compositions shown in the table below. Next, a disk-shaped porcelain sample with dimensions of 5 mm in diameter and 2 mm in thickness was cut out from each piece of porcelain, and its resonance frequency (approximately 11 GH
The dielectric constant (ε) was measured from the dielectric constant (ε) and the diameter, and the unloaded Q (Qu) was measured by the band reflection method.
共振周波数の温度安定度（τｆ）については、温度槽に
各試料を入れ、−３０℃から＋７０℃の温度変化におけ
るトラツプ周波数の変化を測定きて求めた。その結果を
下表に示す。Ｘは３Ｂａ０− ＸＭｇＯ・ （１− ｘ
）ＺｎＯ− Ｎｂ２Ｏ５の組成比率を示す。The temperature stability (τf) of the resonance frequency was determined by placing each sample in a temperature bath and measuring the change in trap frequency as the temperature changed from -30°C to +70°C. The results are shown in the table below. X is 3Ba0-XMgO・(1-x
) shows the composition ratio of ZnO-Nb2O5.
表より明らかなように、本発明の誘電体磁器材料は、マ
イクロ波領域において、無負荷Ｑが大きく、誘電率が比
較的大きく、さらに共振周波数の温度安定度の改善され
た優れたものであることがわかる。As is clear from the table, the dielectric ceramic material of the present invention has a large no-load Q, a relatively large dielectric constant, and is excellent in the temperature stability of the resonance frequency in the microwave region. I understand that.
なお、本発明にかかる磁器は、低周波領域においても誘
電損失が小さく、かつ誘電率の温度変化が小さいので、
磁器コンデンサ用としても優れた材料であることを確認
した。In addition, the porcelain according to the present invention has small dielectric loss even in the low frequency range and small temperature change in dielectric constant, so
It was confirmed that it is an excellent material for ceramic capacitors.
Claims (1)
ｂ＿２Ｏ＿５で表わされる組成において、０．０１≦ｘ
≦０．９９の範囲内にある組成であることを特徴とする
誘電体磁器材料。1 General formula 3BaO・xMgO・(1-x)ZnO・N
In the composition represented by b_2O_5, 0.01≦x
A dielectric ceramic material characterized by having a composition within the range of ≦0.99.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52143446A JPS5951085B2 (en) | 1977-11-29 | 1977-11-29 | dielectric porcelain material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52143446A JPS5951085B2 (en) | 1977-11-29 | 1977-11-29 | dielectric porcelain material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5475598A JPS5475598A (en) | 1979-06-16 |
| JPS5951085B2 true JPS5951085B2 (en) | 1984-12-12 |
Family
ID=15338878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52143446A Expired JPS5951085B2 (en) | 1977-11-29 | 1977-11-29 | dielectric porcelain material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5951085B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0616364B2 (en) * | 1985-08-13 | 1994-03-02 | 宇部興産株式会社 | Dielectric porcelain composition |
-
1977
- 1977-11-29 JP JP52143446A patent/JPS5951085B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5475598A (en) | 1979-06-16 |
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