JPH04265270A - Nonreducible dielectric ceramic composition - Google Patents
Nonreducible dielectric ceramic compositionInfo
- Publication number
- JPH04265270A JPH04265270A JP3045786A JP4578691A JPH04265270A JP H04265270 A JPH04265270 A JP H04265270A JP 3045786 A JP3045786 A JP 3045786A JP 4578691 A JP4578691 A JP 4578691A JP H04265270 A JPH04265270 A JP H04265270A
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- Prior art keywords
- dielectric
- weight
- ceramic composition
- dielectric ceramic
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- 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.)
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- 239000000203 mixture Substances 0.000 title claims abstract description 11
- 239000000919 ceramic Substances 0.000 title claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000006104 solid solution Substances 0.000 claims description 4
- 229910002113 barium titanate Inorganic materials 0.000 claims description 3
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 2
- 239000010953 base metal Substances 0.000 abstract description 5
- 230000007935 neutral effect Effects 0.000 abstract description 4
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000009413 insulation Methods 0.000 description 8
- 239000003985 ceramic capacitor Substances 0.000 description 7
- 239000003989 dielectric material Substances 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 239000002003 electrode paste Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- NLQFUUYNQFMIJW-UHFFFAOYSA-N dysprosium(III) oxide Inorganic materials O=[Dy]O[Dy]=O NLQFUUYNQFMIJW-UHFFFAOYSA-N 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- VASIZKWUTCETSD-UHFFFAOYSA-N manganese(II) oxide Inorganic materials [Mn]=O VASIZKWUTCETSD-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten(VI) oxide Inorganic materials O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Inorganic Insulating Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Capacitors (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は非還元性誘電体磁器組成
物に係り、特に高誘電率でかつ誘電体損失が小さく、高
温での電圧印加に対する寿命(以下、高温負荷寿命とい
う)の良好な高信頼性の誘電体磁器組成物に関する。[Industrial Application Field] The present invention relates to a non-reducible dielectric ceramic composition, which has a particularly high dielectric constant and low dielectric loss, and has a good lifespan when voltage is applied at high temperatures (hereinafter referred to as high-temperature load life). The present invention relates to a highly reliable dielectric ceramic composition.
【0002】0002
【従来の技術】通信機、電子計算機、テレビ受像機等の
電子機器に用いられるIC回路素子等に広く使用されて
いる積層セラミックコンデンサは小型で大容量のものが
好ましい。2. Description of the Related Art Multilayer ceramic capacitors, which are widely used in IC circuit elements used in electronic equipment such as communication devices, electronic computers, and television receivers, are preferably small and large in capacity.
【0003】このような小型で大容量の積層セラミック
コンデンサは、例えば、BaTiO3 の如きチタン酸
塩を主成分とした誘電体材料を使用することにより次の
ような方法で製造される。[0003] Such a small-sized, large-capacity multilayer ceramic capacitor is manufactured by the following method using a dielectric material whose main component is a titanate such as BaTiO3.
【0004】従来、積層セラミック・コンデンサを製造
する方法は大別して、印刷法及びシート法がある。Conventionally, methods for manufacturing multilayer ceramic capacitors are roughly divided into printing methods and sheet methods.
【0005】前者は、誘電体のスラリーを作った後これ
を例えばスクリーン印刷により所定形状に印刷し、乾燥
後その上に電極ペーストを印刷し、この電極ペーストが
乾燥した後に次の誘電体スラリーを印刷するという方法
を繰返すことにより、誘電体層と内部電極層を積層する
ものである。In the former method, after making a dielectric slurry, it is printed into a predetermined shape by screen printing, for example, and after drying, an electrode paste is printed on it, and after this electrode paste has dried, the next dielectric slurry is applied. By repeating the printing method, dielectric layers and internal electrode layers are laminated.
【0006】後者は、誘電体シートを例えばドクターブ
レード法で作成し、その上に電極ペーストを印刷し、こ
れを複数枚積み重ねて熱圧着し積層化する。[0006] In the latter method, a dielectric sheet is prepared by, for example, a doctor blade method, an electrode paste is printed on the dielectric sheet, and a plurality of sheets are stacked and bonded by thermocompression to form a laminate.
【0007】このように適当な方法により積層化したも
のを空気中1250℃〜1400℃で焼成して焼結体を
作り、内部電極と導通する外部引出し電極をこれに焼付
けることにより積層セラミックコンデンサを得ていた。[0007] By firing the laminated product using an appropriate method in air at 1250°C to 1400°C to produce a sintered body, and baking external lead electrodes that are electrically connected to the internal electrodes into this, a multilayer ceramic capacitor is produced. I was getting .
【0008】これらの方法ではコンデンサの電極となる
内部電極と誘電体を同時に焼成するため、内部電極の材
料としては誘電体が焼結する温度内で電極が形成できる
こと、及び空気中で上記の温度に加熱しても酸化したり
、あるいは誘電体と反応しないことが必要である。この
ためこれらの条件を満たすものとして白金やパラジウム
などの貴金属が主に使用されていた。[0008] In these methods, the internal electrode, which becomes the electrode of the capacitor, and the dielectric are fired at the same time, so the material for the internal electrode must be such that the electrode can be formed within the temperature range at which the dielectric sinters, and that it cannot be heated at the above temperature in air. It is necessary that the material does not oxidize or react with the dielectric material even when heated to a certain temperature. For this reason, noble metals such as platinum and palladium have been mainly used as materials that meet these conditions.
【0009】しかしながらこれらの貴金属は非常に安定
ではあるが、高価であって、積層セラミックコンデンサ
のコストに占める割合が20%〜50%程度と非常に大
きく、そのコストアップの最大の原因になっていた。However, although these precious metals are very stable, they are expensive and account for a very large proportion of the cost of multilayer ceramic capacitors, ranging from 20% to 50%, and are the biggest cause of cost increases. Ta.
【0010】この問題に対処するためにNi,Cu,F
e合金等の安価な卑金属を内部電極として使用する試み
が、すでに行われている。[0010] To deal with this problem, Ni, Cu, F
Attempts have already been made to use inexpensive base metals such as e-alloys as internal electrodes.
【0011】[0011]
【発明が解決しようとする課題】ところが、卑金属の電
極材料として、例えばNiを使用すると、Niは空気中
で誘電体層と同時に焼成された時に酸化し、誘電体層内
にNiが拡散して、金属電極層が形成されず絶縁化して
しまう。このため電極としての機能を果たさなくなる。[Problems to be Solved by the Invention] However, when Ni, for example, is used as a base metal electrode material, the Ni oxidizes when fired in air at the same time as the dielectric layer, causing Ni to diffuse into the dielectric layer. , the metal electrode layer is not formed and becomes insulated. Therefore, it no longer functions as an electrode.
【0012】それ故Niの酸化を防止するように、中性
あるいは還元性雰囲気中で焼成することになるが、この
場合には誘電体材料が還元され、誘電体層の比抵抗が非
常に低いものとなってしまい、特に高温負荷寿命が短く
なる。このため、コンデンサ用誘電体材料として使用で
きなくなるという問題点がある。[0012] Therefore, in order to prevent Ni from oxidizing, firing is performed in a neutral or reducing atmosphere, but in this case, the dielectric material is reduced and the specific resistance of the dielectric layer is extremely low. In particular, the high temperature load life is shortened. Therefore, there is a problem that it cannot be used as a dielectric material for capacitors.
【0013】従って、本発明の目的は、積層セラミック
コンデンサに用いる誘電体材料として、Ni等の卑金属
と同時に中性あるいは還元性雰囲気中で焼成しても還元
されない非還元性であり、かつ誘電率が高く、誘電体損
失が小さく、絶縁抵抗が高く、高温負荷寿命が長い誘電
体磁器組成物を提供するものである。Therefore, an object of the present invention is to use a dielectric material for a multilayer ceramic capacitor that is non-reducible and will not be reduced even when fired in a neutral or reducing atmosphere together with a base metal such as Ni, and has a dielectric constant. The purpose of the present invention is to provide a dielectric ceramic composition that has high resistance, low dielectric loss, high insulation resistance, and long high-temperature load life.
【0014】[0014]
【課題を解決するための手段】前記の問題点を解決する
ため、本発明者は鋭意研究の結果、チタン酸バリウムを
主成分とする多結晶固溶体からなり、この固溶体の組成
式が{Ba(1−x)Cax}A・{Ti(1−y)Z
ry}B・O3 +aM1 +bM2 +c(M3 +
M4)で示される組成物において、M1 ,M2 ,M
3 ,M4 がM1 :Mn,Crの化合物の少くとも
一種M2 :Siの化合物、
M3 :Dyの化合物、
M4 :Wの化合物、
であり、かつx,y,A,B,a,b,cが0≦x≦2
4 (モル%)
8≦y≦22 (モル%)
1.000 ≦A/B ≦1.040 0.05≦a≦
1.0 (酸化物換算でのABO3 に対する重量%)
0.05≦b≦1.0 (酸化物換算でのABO3 に
対する重量%)
0.05≦c≦2.0 (酸化物換算でのABO3 に
対する重量%)
(ただし、M3 の最大値は、1.0 重量%、M4
の最大値は1.0 重量%とする。)の範囲にある組成
物である誘電体磁器組成物が前記の問題点を解決するこ
とを見出した。[Means for Solving the Problems] In order to solve the above-mentioned problems, the inventors of the present invention have conducted intensive research and found that a polycrystalline solid solution containing barium titanate as a main component is formed, and the compositional formula of this solid solution is {Ba( 1-x)Cax}A・{Ti(1-y)Z
ry}B・O3 +aM1 +bM2 +c(M3 +
In the composition represented by M4), M1 , M2 , M
3, M4 are at least one of the compounds of M1: Mn, Cr, M2: a compound of Si, M3: a compound of Dy, M4: a compound of W, and x, y, A, B, a, b, c is 0≦x≦2
4 (mol%) 8≦y≦22 (mol%) 1.000≦A/B≦1.040 0.05≦a≦
1.0 (Weight% relative to ABO3 in terms of oxide) 0.05≦b≦1.0 (Weight% relative to ABO3 in terms of oxide) 0.05≦c≦2.0 (ABO3 in terms of oxide) % by weight) (However, the maximum value of M3 is 1.0% by weight, M4
The maximum value of is 1.0% by weight. ) has been found to solve the above problems.
【0015】[0015]
【実施例】出発原料として、BaCO3 ,TiO2
,ZrO2 ,CaCO3 ,MnOまたはCr2 O
3 ,SiO2 ,Dy2 O3 ,WO3を用い、そ
れぞれ焼成後の組成が後掲の表1、表2の如くになるよ
うに秤量し混合する。[Example] As starting materials, BaCO3, TiO2
, ZrO2, CaCO3, MnO or Cr2O
3, SiO2, Dy2O3, and WO3 are weighed and mixed so that the composition after firing is as shown in Tables 1 and 2 below.
【0016】その後脱水乾燥させ、1050℃〜124
0℃で2時間仮焼成する。この仮焼成体を微粉砕し、脱
水乾燥して粉末とする。[0016] After that, it is dehydrated and dried at 1050°C to 124°C.
Temporarily bake at 0°C for 2 hours. This calcined body is finely pulverized and dehydrated and dried to form a powder.
【0017】得られた粉末に適当量の有機バインダを加
え、厚さ20μmと厚さ100μmのシートを得る。次
にまず厚さ20μmのシートの両面に電極用としてNi
粉末をビヒクル中に分散させた電極ペーストをスクリー
ン印刷により塗布し電極とする。An appropriate amount of organic binder is added to the obtained powder to obtain sheets having a thickness of 20 μm and a thickness of 100 μm. Next, first, Ni was applied to both sides of the 20 μm thick sheet for electrodes.
An electrode paste containing powder dispersed in a vehicle is applied by screen printing to form an electrode.
【0018】更にこの上下に厚さ100μmのシートを
熱圧着により圧着する。この厚さ100μmのシートは
、焼成後のハンドリングを考慮し、素体強度を上げるた
めのものであり、電気的特性には何等影響を及ぼさない
。Further, sheets having a thickness of 100 μm are bonded to the top and bottom of this by thermocompression bonding. This sheet having a thickness of 100 μm is used to increase the strength of the element body in consideration of handling after firing, and does not affect the electrical characteristics in any way.
【0019】熱圧着したシートを約3.9 ×1.9
ミリの寸法に切断し、これをジルコニア板の上にのせ、
匣鉢の中に入れて500℃まで空気中で加熱し有機バイ
ンダを燃焼させ、その後N2 中またはN2 +H2
中で1300℃〜1400℃で2時間燃焼する。[0019] The heat-pressed sheet is approximately 3.9 x 1.9
Cut it into millimeter dimensions, place it on a zirconia plate,
Place in a sagger and heat in air to 500℃ to burn the organic binder, then in N2 or N2 + H2
Burn at 1300°C to 1400°C for 2 hours.
【0020】焼結後の素地寸法は約3.2 ×1.6
ミリとなる。その後空気+N2 中で800℃〜110
0℃で2時間アニーリングしてサンプルを得る。[0020] The base size after sintering is approximately 3.2 x 1.6
It becomes millimeter. After that, 800℃~110℃ in air + N2
Obtain the sample by annealing for 2 hours at 0°C.
【0021】このサンプルの端部にIn−Gaを塗布し
、外部引出し電極とすることにより電気的特性を測定す
る。電気的特性は比誘電率(εs )、誘電体損失(t
anδ、%)、絶縁抵抗(IR,Ω,25VDC,60
秒値)、高温負荷寿命(200℃で100VDCを印加
し、6mA以上の電流が流れるまでの時間、HR)を測
定する。[0021] In--Ga is coated on the end of this sample and the electrical characteristics are measured by using it as an external lead electrode. The electrical characteristics include relative permittivity (εs), dielectric loss (t
anδ, %), insulation resistance (IR, Ω, 25VDC, 60
Second value) and high temperature load life (time until a current of 6 mA or more flows when 100 VDC is applied at 200° C., HR) are measured.
【0022】その結果を表1、表2に示す。なお、表1
、表2において、*印の付与されたものは、本発明の範
囲外のものであり、本発明の実施例のものと比較のため
に提示する。The results are shown in Tables 1 and 2. In addition, Table 1
, In Table 2, those marked with * are outside the scope of the present invention, and are presented for comparison with the examples of the present invention.
【0023】[0023]
【表1】[Table 1]
【0024】[0024]
【表2】[Table 2]
【0025】表1、表2から明らかなように、本発明の
ものは比誘電率が7500以上と特に高く、誘電体損失
は1.0 〜4.8 %と小さな値を示しており、かつ
高温での負荷寿命が結80〜600時間と長いものであ
る。また常温における絶縁抵抗も高い値を示している。As is clear from Tables 1 and 2, the material of the present invention has a particularly high dielectric constant of 7500 or more, a small dielectric loss of 1.0 to 4.8%, and It has a long load life of 80 to 600 hours at high temperatures. Furthermore, the insulation resistance at room temperature also shows a high value.
【0026】次にこのような本発明の各組成範囲の数値
限定の理由を説明する。Next, the reason for limiting the numerical values of each composition range of the present invention will be explained.
【0027】まずxが24より大きくなると、比誘電率
εs が低下する(例えば表2の試料No. 26参照
)。First, when x becomes larger than 24, the relative dielectric constant εs decreases (see, for example, sample No. 26 in Table 2).
【0028】またyが8より小さくなると、比誘電率ε
s が低下し、誘電体損失tanδも大きくなる。これ
はキュリー点が高温側にあるためである(例えば表2の
試料No34参照)。Further, when y becomes smaller than 8, the relative dielectric constant ε
s decreases, and dielectric loss tan δ also increases. This is because the Curie point is on the high temperature side (for example, see sample No. 34 in Table 2).
【0029】一方、yが22より大きくなると、比誘電
率εs が低下する。これはキュリー点が低温側に移動
するためである(例えば表2の試料No. 30参照)
。On the other hand, when y becomes larger than 22, the dielectric constant εs decreases. This is because the Curie point moves to the lower temperature side (for example, see sample No. 30 in Table 2).
.
【0030】またA/B が1000より小さくなると
、誘電体が還元し、絶縁抵抗IRが低下し、比誘電率ε
s および誘電体損失tanδの測定は不能であった。
また高温負荷寿命が短かくなる(例えば表2の試料No
.21参照)。Further, when A/B becomes smaller than 1000, the dielectric substance is reduced, the insulation resistance IR decreases, and the relative permittivity ε
It was not possible to measure s and dielectric loss tan δ. Also, the high temperature load life will be shortened (for example, sample No. in Table 2).
.. (see 21).
【0031】さらにA/B が1040より大きくなる
と比誘電率εsが低下し、誘電体損失tanδも大きく
なる。絶縁抵抗IRも低下し、高温負荷寿命も短かくな
る(例えば表2の試料No. 25参照)。Further, when A/B becomes larger than 1040, the dielectric constant εs decreases and the dielectric loss tan δ also increases. The insulation resistance IR also decreases, and the high temperature load life also decreases (see, for example, sample No. 25 in Table 2).
【0032】aが0.05より小さくなると、誘電体損
失tanδが大きく、高温負荷寿命も短かくなる(例え
ば表1の試料No. 16参照)。When a is smaller than 0.05, the dielectric loss tan δ becomes large and the high temperature load life becomes short (for example, see sample No. 16 in Table 1).
【0033】aが1.0 より大きくなると、比誘電率
εs が低下する(例えば表2の試料No. 20参照
)。When a becomes larger than 1.0, the relative dielectric constant εs decreases (see, for example, sample No. 20 in Table 2).
【0034】bが0.05より小さくなると、比誘電率
εs が低下し、高温負荷寿命も短かくなる(例えば表
1の試料No. 12参照)。When b is smaller than 0.05, the dielectric constant εs decreases, and the high temperature load life also becomes short (see, for example, sample No. 12 in Table 1).
【0035】bが、1.0 より大きくなると、比誘電
率εs が低下する(例えば表1の試料No. 15参
照)。When b becomes larger than 1.0, the relative dielectric constant εs decreases (see, for example, sample No. 15 in Table 1).
【0036】cが0.05より小さくなると、高温負荷
寿命が短かくなる(例えば表1の試料No. 1参照)
。[0036] When c becomes smaller than 0.05, the high temperature load life becomes short (for example, see sample No. 1 in Table 1).
.
【0037】cが2.0 より大きくなると、誘電体が
還元し、絶縁抵抗IRが低下し、比誘電率εs 及び誘
電体損失tanδの測定は不能だった。また高温負荷寿
命も短かくなる(例えば表1の試料No. 9参照)。When c was larger than 2.0, the dielectric was reduced and the insulation resistance IR was lowered, making it impossible to measure the relative permittivity εs and the dielectric loss tanδ. Furthermore, the high temperature load life is also shortened (see, for example, sample No. 9 in Table 1).
【0038】しかし、cが2.0 以下でもM3(Dy
2 O3)が1.0 以上またはM4(WO3)が1.
0 以上の時は、誘電体が還元し、絶縁抵抗IRが低下
し、比誘電率εs 及び誘電体損失tanδの測定は不
能であった。またいずれの場合も高温負荷寿命も短かく
なる(例えば表1の試料No. 10及び試料No.
6参照)。However, even if c is less than 2.0, M3(Dy
2 O3) is 1.0 or more or M4 (WO3) is 1.0 or more.
0 or more, the dielectric was reduced and the insulation resistance IR was lowered, making it impossible to measure the relative permittivity εs and the dielectric loss tanδ. Also, in either case, the high temperature load life will be shortened (for example, sample No. 10 and sample No. 1 in Table 1).
(see 6).
【0039】[0039]
【発明の効果】本発明によれば中性または還元性雰囲気
中で焼成しても比誘電率が高く、誘電体損失が小さくか
つ高温負荷寿命も長く絶縁抵抗の高い高信頼性の誘電体
磁器組成物を得ることができる。According to the present invention, a highly reliable dielectric porcelain with a high dielectric constant, low dielectric loss, long high-temperature load life, and high insulation resistance even when fired in a neutral or reducing atmosphere. A composition can be obtained.
【0040】これにより、Ni等の卑金属を内部電極と
する積層セラミックコンデンサを製造することができる
ようになった。[0040] As a result, it has become possible to manufacture a multilayer ceramic capacitor using a base metal such as Ni as an internal electrode.
Claims (1)
晶固溶体からなり、該固溶体の組成式が、{Ba(1−
x)Cax}A・{Ti(1−y)Zry}B・O3
+aM1 +bM2 +c(M3 +M4)で示される
時、M1 ,M2 ,M3 ,M4 が M1 :Mn,Crの化合物の少くとも一種M2 :S
iの化合物、 M3 :Dyの化合物、 M4 :Wの化合物、 であり、かつa,b,cが酸化物換算で0.05≦a≦
1.0 (前記ABO3 に対する重量%)0.05≦
b≦1.0 (前記ABO3 に対する重量%)0.0
5≦c≦2.0 (前記ABO3 に対する重量%)(
ただし、M3 の最大値は、1.0 重量%、M4 の
最大値は1.0 重量%とする。) 0 ≦x≦0.24 0.08 ≦y≦0.22 1.000≦A/B ≦1.040 の範囲にあることを特徴とする非還元性誘電体磁器組成
物。Claim 1: Consists of a polycrystalline solid solution containing barium titanate as a main component, and the compositional formula of the solid solution is {Ba(1-
x) Cax}A・{Ti(1-y)Zry}B・O3
+aM1 +bM2 +c (M3 +M4), when M1, M2, M3, M4 are at least one type of compound M1:Mn,Cr M2:S
i compound, M3: Dy compound, M4: W compound, and a, b, c are 0.05≦a≦ in terms of oxide.
1.0 (weight% relative to the above ABO3) 0.05≦
b≦1.0 (weight% relative to the above ABO3) 0.0
5≦c≦2.0 (weight% relative to the above ABO3) (
However, the maximum value of M3 is 1.0% by weight, and the maximum value of M4 is 1.0% by weight. ) 0≦x≦0.24 0.08≦y≦0.22 1.000≦A/B≦1.040 A non-reducible dielectric ceramic composition.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3045786A JPH04265270A (en) | 1991-02-18 | 1991-02-18 | Nonreducible dielectric ceramic composition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3045786A JPH04265270A (en) | 1991-02-18 | 1991-02-18 | Nonreducible dielectric ceramic composition |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04265270A true JPH04265270A (en) | 1992-09-21 |
Family
ID=12728966
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3045786A Withdrawn JPH04265270A (en) | 1991-02-18 | 1991-02-18 | Nonreducible dielectric ceramic composition |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04265270A (en) |
-
1991
- 1991-02-18 JP JP3045786A patent/JPH04265270A/en not_active Withdrawn
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