JPS6050008B2 - High dielectric constant porcelain composition - Google Patents
High dielectric constant porcelain compositionInfo
- Publication number
- JPS6050008B2 JPS6050008B2 JP57214868A JP21486882A JPS6050008B2 JP S6050008 B2 JPS6050008 B2 JP S6050008B2 JP 57214868 A JP57214868 A JP 57214868A JP 21486882 A JP21486882 A JP 21486882A JP S6050008 B2 JPS6050008 B2 JP S6050008B2
- Authority
- JP
- Japan
- Prior art keywords
- dielectric constant
- high dielectric
- composition
- porcelain composition
- constant porcelain
- 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
- 239000000203 mixture Substances 0.000 title claims description 17
- 229910052573 porcelain Inorganic materials 0.000 title description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000005245 sintering Methods 0.000 description 8
- 238000010304 firing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000003985 ceramic capacitor Substances 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
Landscapes
- Inorganic Insulating Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Capacitors (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明はセラミックコンデンサ用材料に適した焼結温度
の低い高誘電率磁器組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high dielectric constant ceramic composition having a low sintering temperature and suitable as a material for a ceramic capacitor.
従来例の構成とその問題点
誘電材料の具備すべき特性は用途により異なるが、セラ
ミックコンデンサでは誘電率が大きく、かつ焼結温度の
低いことが要求される。Conventional Structures and Problems The characteristics that a dielectric material should have vary depending on the application, but ceramic capacitors are required to have a high dielectric constant and a low sintering temperature.
誘電率が大きいことは素子の小形化にとつて重要な条件
である。焼結温度の低いことは、磁器材料の焼成の際に
、焼成炉の炉材に安価なものを使用できることおよび焼
成のエネルギーが少なくてすむことなど工業的価値が大
きい。また、積層型セラミックコンデンサにおいて、焼
結温度が低いと内部電極として銀を主成分とする比較的
安価な電極利料を用いることができるため、コンデンサ
の価格を著しく下げることができる。従来、高誘電率の
セラミックコンデンサ用材料としては、チタン酸バリウ
ム系磁器が用いられてきた。A high dielectric constant is an important condition for miniaturizing devices. The low sintering temperature has great industrial value, as it allows the use of inexpensive furnace materials for the firing furnace and requires less energy for firing when firing porcelain materials. Furthermore, in a multilayer ceramic capacitor, if the sintering temperature is low, a relatively inexpensive electrode material mainly composed of silver can be used as the internal electrode, so the price of the capacitor can be significantly reduced. Conventionally, barium titanate-based porcelain has been used as a material for high dielectric constant ceramic capacitors.
しかし、この材料は焼結温度が１３００〜１４００℃と
高いため、積層セラミックコンデンサを製造する場合に
は、その焼結温度に適した高価な白金またはパラジウム
を主成分とする内部電極を使用しなければならないとい
う欠点があつた。発明の目的
本発明は上記の欠点を改善し、焼結温度が１０００℃以
下と低く、かつ誘電率の大きい磁器組成物を提供するも
のである。However, this material has a high sintering temperature of 1,300 to 1,400°C, so when manufacturing multilayer ceramic capacitors, it is necessary to use expensive internal electrodes that are suitable for the sintering temperature and whose main component is platinum or palladium. There was a drawback that it did not work. OBJECTS OF THE INVENTION The present invention improves the above-mentioned drawbacks and provides a ceramic composition having a low sintering temperature of 1000° C. or less and a high dielectric constant.
発明の構成 本発明の組成物は、Ｐｂ（Ｍｇ、Ｉ３Ｎｌ）、ｌ。Composition of the invention The composition of the present invention comprises Pb(Mg, I3Nl), l.
）ｘ（Ｎｉ、Ｉ、Ｎ『１０）、（Ｆｅ、Ｉ。Ｎｂ、Ｉ。
）２Ｏ。て表わされる組成物において組成比が０．０５
≦Ｘ≦０．７５、０．０５≦ｙ≦０．５０、０．１５≦
ｚ≦０．７０（ただし、ｘ＋ｙｆｚ＝１）の範囲内にあ
ることを特徴とする高誘電率磁器組成物である。実施例
の説明
原料として、ＰｂＯ、ＭｇＯ、ＮｉＯ、Ｆｅ。) x (Ni, I, N'10), (Fe, I. Nb, I.
)2O. In the composition represented by , the composition ratio is 0.05
≦X≦0.75, 0.05≦y≦0.50, 0.15≦
This is a high dielectric constant ceramic composition characterized in that z≦0.70 (x+yfz=1). Examples Raw materials include PbO, MgO, NiO, and Fe.
０３、Ｎ坏０、を用いて、これらを下表に示した組成比
に”秤量し湿式で混合し、これを乾燥後７５０℃で２時
間仮焼したのち、ボールミルで湿式粉砕した。03 and N Kyo 0. These were weighed and wet-mixed to the composition ratio shown in the table below, dried, calcined at 750° C. for 2 hours, and then wet-pulverized in a ball mill.
乾燥後、ポリビニルアルコールの水溶液をバインダとし
て直径１３ｗｌ、長さ約８７７Ｚ７７ｌの円柱状に加圧
成形し、バインダを焼却した後、これをマグネシア磁−
器容器に入れて９２０〜１０２０℃の範囲内の温度で２
時間焼成した。焼成した磁器を厚さｌｗｒ！ｎに切断し
、この両面にＣｒ−Ａｕを蒸着したのち誘電率Ｅｒと誘
電正接Ｄを１ＫＨｚ，１Ｖ／Ｗｎで室温において測定し
た。εｒの温度変化率は２０℃を基準として，：８−２
５℃〜８５℃の範囲で測定した。その結果を下表に示す
。上表でＮＯ．ｌ，５，７，ｌ３，ｌ４および１７の試
料は本発明の範囲外のものであり、ＮＯ．２〜４，６，
８〜１２，１５，および１６の試料は本発明の範囲内の
実施例である。After drying, a polyvinyl alcohol aqueous solution was used as a binder to form a columnar shape with a diameter of 13 wl and a length of about 877 x 77 liters. After incinerating the binder, this was molded into a magnesia magnet.
Place it in a container and heat it at a temperature within the range of 920 to 1020℃.
Baked for an hour. The thickness of fired porcelain is lwr! After cutting Cr--Au onto both sides, the dielectric constant Er and dielectric loss tangent D were measured at 1 KHz and 1 V/Wn at room temperature. The temperature change rate of εr is based on 20℃: 8-2
Measurements were made in the range of 5°C to 85°C. The results are shown in the table below. No. in the above table. Samples No. 1, 5, 7, 13, 14 and 17 are outside the scope of the present invention; 2～4,6,
Samples 8-12, 15, and 16 are examples within the scope of the invention.
上表から明らかなように、本発明の範囲内の組成物より
なる磁器は大きな誘電率（７８３０〜１１７４０）を示
すとともに、焼結温度が低い（９２０〜１０００℃）こ
と、誘電正接Ｄが小さいこと，誘電率Ｅｒの温度変化率
が小さいことなどの特長を示す。As is clear from the above table, the porcelain made of the composition within the scope of the present invention exhibits a large dielectric constant (7830 to 11740), a low sintering temperature (920 to 1000°C), and a small dielectric loss tangent D. It exhibits features such as low temperature change rate of dielectric constant Er.
なお、Ｘ＜０．０５，ｙ〉０．５０，ｚ＜０．１５およ
びｚ〉０．７０の範囲の組成は誘電率が比較的小さいた
め、また、ｘ〉０。Note that compositions in the ranges of X<0.05, y>0.50, z<0.15 and z>0.70 have relatively small dielectric constants, and therefore x>0.
７５とｙ＜０．０５の範囲の組成は誘電率の温度変化率
が比較的大きいため本発明の範囲から除き、本発明の範
囲は誘電率が７５００以上で、誘電率の温度変化率が外
４０％以下で、かつ焼成温度１０００′Ｃ以下の組成に
限定した。Compositions in the range of 75 and y<0.05 are excluded from the scope of the present invention because the rate of temperature change in dielectric constant is relatively large; The composition was limited to 40% or less and a firing temperature of 1000'C or less.
発明の効果本発明の組成物は誘電率が大きく、誘電率の
温”度変化率と誘電正接が比較的小さいため、セラミッ
クコンデンサ用材料に適しているとともに、１０００℃
以下の低い温度で焼成できるため、焼成炉の炉材に安価
なものを使用できることおよび焼成のエネルギーが少な
くてすむことなど工業的価値が大きいものである。Effects of the Invention The composition of the present invention has a large dielectric constant, a relatively small temperature change rate of the dielectric constant, and a relatively small dielectric loss tangent.
Since it can be fired at a temperature as low as 300 ml, it has great industrial value because it allows the use of inexpensive materials for the firing furnace and requires less energy for firing.
Claims (1)
＿１／＿３Ｎｂ＿２／＿３）＿ｙ（Ｆｅ＿１／＿２Ｎｂ
＿１／＿２）＿ｚＯ＿３で表わされる組成物において組
成比が０．０５≦ｘ≦０．７５、０．０５≦ｙ≦０．５
０および０．１５≦ｚ≦０．７０（ただし、ｘ＋ｙ＋ｚ
＝１）の範囲内にあることを特徴とする高誘電率磁器組
成物。1 Pb(Mg_1/_3Nb_2/_3)_x(Ni
_1/_3Nb_2/_3)_y(Fe_1/_2Nb
_1/_2) In the composition represented by _zO_3, the composition ratio is 0.05≦x≦0.75, 0.05≦y≦0.5
0 and 0.15≦z≦0.70 (however, x+y+z
A high dielectric constant ceramic composition characterized by being within the range of =1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57214868A JPS6050008B2 (en) | 1982-12-08 | 1982-12-08 | High dielectric constant porcelain composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57214868A JPS6050008B2 (en) | 1982-12-08 | 1982-12-08 | High dielectric constant porcelain composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59105209A JPS59105209A (en) | 1984-06-18 |
| JPS6050008B2 true JPS6050008B2 (en) | 1985-11-06 |
Family
ID=16662886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57214868A Expired JPS6050008B2 (en) | 1982-12-08 | 1982-12-08 | High dielectric constant porcelain composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6050008B2 (en) |
-
1982
- 1982-12-08 JP JP57214868A patent/JPS6050008B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59105209A (en) | 1984-06-18 |
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