CN1955143A - Dielectric ceramic composition - Google Patents
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- CN1955143A CN1955143A CN 200610164633 CN200610164633A CN1955143A CN 1955143 A CN1955143 A CN 1955143A CN 200610164633 CN200610164633 CN 200610164633 CN 200610164633 A CN200610164633 A CN 200610164633A CN 1955143 A CN1955143 A CN 1955143A
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Abstract
A dielectric ceramic composition comprises 40-54 wt.% SrTiO3, 18-25 wt.% PbTiO3, 15-30 wt.% Bi2O3-nTiO2((n) expresses a compound ratio) and 8-12 wt.% CaTiO3 as essential ingredients and 0.1-0.5 wt.% CuO, 0.05-0.5 wt.% Nb2O5 and 0.05-0.5 wt.% MnO as accessory ingredients based on 100 wt.% essential ingredients. According to this invention, the dielectric ceramic composition exhibits low loss in a high frequency zone, having both relative permittivity and the rate of change of dielectric temperature characteristics in a high level.
Description
Technical field
The present invention relates to a kind of dielectric ceramic composition and ceramic condenser, especially relate to a kind of high-k particularly and the loss in high-frequency region is low, the dielectric ceramic composition that has good temperature profile, can not be reduced in reducing atmosphere.
Background technology
In recent years, along with the miniaturization of switch power supply etc. and the fast development of high frequencyization, require high performance simultaneously, the electrical condenser that uses in the buffer circuit of switch power supply and invertor ballast circuit etc. also requires the low-loss in high-frequency region and requires high characteristic in order to suppress spontaneous heating.
But in existing electrical condenser, it is big that the dielectric loss in the high-frequency region becomes, and the spontaneous heating of electrical condenser becomes problem.In addition, even realized the interior low-loss of high-frequency region, but also there is the problem on the characteristics such as specific inductivity is low, specific inductivity temperature profile velocity of variation is bad., open in the 2001-247364 communique for this reason,, provide a kind of electrical condenser that contains dielectric ceramic composition as its improved purpose the spy.
Open in the 2001-247364 communique the spy, disclose and a kind ofly can obtain the electrical condenser that high-frequency loss is low, relative permittivity is high.Yet, drive the electrical condenser of the disclosed embodiments in the 2001-247364 communique the spy, the spontaneous heating of electrical condenser is little under low-loss situation, but relative permittivity is many at the sample below 2000, and for the specific inductivity temperature profile velocity of variation under+85 ℃, most of sample all surpasses 15%, and it is good to say so.And do not take into account the sample of relative permittivity and the specific inductivity temperature profile velocity of variation under+85 ℃, if, then become abominable result on the other hand for this is good on the one hand.
Consider rapid technology development in recent years, seek a kind of in high-frequency region low-loss and can under high level, take into account the electrical condenser of relative permittivity and specific inductivity temperature profile velocity of variation.
On the other hand, in the past, as the electrode that forms, though use silver, electromigration can take place, in addition because the price comparison height therefore in recent years, uses copper and mickel etc. in electrical condenser.Particularly, because electromigration can not take place in copper, the reliability height, relatively more cheap, therefore be fit to be used as electrode.
Yet, when forming copper electrode, for anti-oxidation, in reducing atmosphere, carry out sintering, therefore the problem that exists dielectric ceramic composition itself to be reduced.
Thereby, in order to provide a kind of reliability high and cheap electrical condenser, not only want dielectric ceramic composition must possess high-performance, it can not be reduced certainly yet in reducing atmosphere when the electrode sintering even also require.
Summary of the invention
In view of the above problems, the purpose of this invention is to provide a kind of dielectric ceramic composition, it has in high-frequency region low-loss and can take into account relative permittivity and specific inductivity temperature profile velocity of variation under high level, and is not reduced in reducing atmosphere.Another object of the present invention provides a kind of electrical condenser with the dielectric layer that comprises above-mentioned dielectric ceramic composition.
To achieve these goals, according to dielectric ceramic composition of the present invention,
Have as main component:
The SrTiO of 40-54 weight %
3,
The PbTiO of 18-25% weight %
3,
The Bi of 15-30% weight %
2O
3NTiO
2(n represents the compound ratio),
The CaTiO of 8-12 weight %
3And
As submember, the main component with respect to 100 weight % has:
O.1-0.5 the CuO of weight %,
0.05-0.5 the Nb of weight %
2O
5,
0.05-0.5 the MnO of weight %.
According to the present invention, by all satisfying above-mentioned compositing range, can obtain a kind of also low-loss and can under high level, take into account relative permittivity and specific inductivity temperature profile velocity of variation, the dielectric ceramic composition that in reducing atmosphere, also can not be reduced in high-frequency region.And, a kind of the have dielectric layer that comprises this dielectric ceramic composition, copper electrode, and and the electrical condenser of the lead terminal of electrode engagement also can be provided.
In addition, preferably, the value of n is 2.5-3.5,2.7-3.2 more preferably, if the value of n is too little, coking property exists and worsens tendency, and if the value of n is too big, there is the tendency that descends in insulation resistance.
Preferably, SrTiO
3Content be 42-46 weight %, if its content is too low, there is the tendency that worsens in tan δ under 100kHz, if its content is too high, there is the tendency that worsens in relative permittivity.
Preferably, PbTiO
3Content be 20-23 weight %, if its content is too low, the tendency that relative permittivity exist to worsen, if its content is too high, there is the tendency that worsens in the tan δ under 100kHz.
Preferably, Bi
2O
3NTiO
2Content be 22-26 weight %, if its content beyond above-mentioned scope, the tendency that exist to worsen of the tan δ under 100kHz then.
Preferably, CaTiO
3Content be 9-11 weight %, if its content is too low, there is the tendency that worsens in specific inductivity temperature profile velocity of variation under 125 ℃, if its content is too high, there is the tendency that worsens in the tan δ under 100kHz.
Preferably, the content of CuO is 0.2-0.4 weight %, if its content is too low, there is the tendency that worsens in the tan δ under 100kHz, if its content is too high, there is the tendency that descends in coking property.
Preferably, Nb
2O
5Content be 0.1-0.3 weight %, if its content is too low, the tendency that tan δ exist to worsen in the electrode sintering atmosphere, if its content is too high, then there is the tendency that worsens in relative permittivity.
Preferably, the content of MnO is 0.1-0.3 weight %, if its content is too low, there is the tendency that worsens in insulation resistance at high temperature, if its content is too high, there is the tendency that worsens in proof voltage.
Ceramic condenser according to the present invention has the dielectric layer that comprises above-mentioned dielectric ceramic composition.
Preferably, the main component of the terminal electrode that forms in above-mentioned electrical condenser is a copper.
Though because electromigration can not take place in copper, the reliability height, relatively more cheap, be suitable as electrode, must in reducing atmosphere, carry out sintering.Yet, even above-mentioned dielectric ceramic composition sintering in reducing atmosphere can not be reduced yet.
Preferably, above-mentioned electrical condenser possesses the lead terminal that engages with terminal electrode.
By connecting lead terminal, operation can be used to be installed in the first-class various uses of tellite easily.
Description of drawings
Introduce embodiments of the present invention with reference to the accompanying drawings in detail.Wherein:
Fig. 1 (A) is the front view according to the ceramic condenser of one embodiment of the present invention;
Fig. 1 (B) is the side cutaway view according to the ceramic condenser of one embodiment of the present invention;
Fig. 2 is the curve of the relation between insulation resistance and the MnO content under the MnO content representing to contain in the dielectric ceramic composition only of the present invention situation about changing;
Fig. 3 is the spontaneous heating temperature of expression embodiments of the invention and comparative example and the curve that applies the relation between the voltage;
Fig. 4 is expression embodiments of the invention and the dielectric loss of comparative example and the curve of the relation between the frequency; With
Fig. 5 is the specific inductivity temperature profile velocity of variation of expression embodiments of the invention and the curve of the relation between the temperature.
Embodiment
Shown in Fig. 1 (A), (B); according to the ceramic condenser 2 of present embodiment have the dielectric layer 10 that contains dielectric ceramic composition, on its apparent surface, form with copper as the terminal electrode 12 of main component with 14 with the lead terminal 6 and 8 that is connected with terminal electrode, and covering protection resin 4.The shape of ceramic condenser 2 can suitably determine that preferably, dielectric layer 10 is that circle is flaky according to purpose and purposes.In addition, though its size also can determine that suitably generally, diameter is about 10mm according to purpose and purposes.
According to the dielectric ceramic composition of present embodiment,, contain SrTiO as main component
3, PbTiO
3, Bi
2O
3NTiO
2(n represents the compound ratio), CaTiO
3As submember, contain CuO, Nb
2O
5, MnO.
SrTiO
3Content be 40-54 weight %, be preferably 42-46 weight %.If its content very little, there is the tendency that worsens in the tan δ under 100kHz, if its content is too many, then there is the tendency that worsens in relative permittivity.
PbTiO
3Content be 18-25 weight %, be preferably 20-23 weight %, if its content very little, the tendency that exist to worsen of relative permittivity then, if its content is too many, then there is the tendency that worsens in the tan δ under 100kHz.
Bi
2O
3NTiO
2Content be 15-30 weight %, n represents the compound ratio, is preferably 22-26 weight %.If its content is beyond above-mentioned scope, then there is the tendency that worsens in the tan δ under 100kHz.In addition, the value of n is preferably 2.7-3.2, if the value of n is too little, then there is the tendency that worsens in coking property, if too big, then there is the tendency that reduces in insulation resistance.
CaTiO
3Content be 8-12 weight %, be preferably 9-11 weight %.If its content very little, there is the tendency that worsens in the specific inductivity temperature profile velocity of variation under 125 ℃, if its content is too many, there is the tendency that worsens in the tan δ under 100kHz.
The content of CuO is 0.1-0.5 weight %, is preferably 0.2-0.4 weight %.If its content very little, there is the tendency that worsens in the tan δ under 100kHz, if its content is too many, then there is the tendency that reduces in coking property.
Nb
2O
5Content be 0.05-0.5 weight %, be preferably 0.1-0.3 weight %.If its content very little, then there is the tendency that worsens in tan δ in Cu electrode sintering atmosphere, if its content is too many, then there is the tendency that worsens in relative permittivity.
The content of MnO is 0.05-0.5 weight %, is preferably 0.1-0.3 weight %.If its content very little, then there is the tendency that worsens in insulation resistance at high temperature, if its content is too many, then there is the tendency that worsens in proof voltage.
In the present embodiment, can provide a kind of high-k and in high-frequency region low-loss and the good electrical condenser of specific inductivity temperature profile velocity of variation.
As the material of terminal electrode 12 and 14, preferably copper.Electromigration as the silver electrode shortcoming can not take place in copper, the reliability height, and price comparison is cheap.
Lead terminal 6 is connected with 14 with terminal electrode 12 with 8.Connect by lead terminal, just operation easily can be installed on tellite etc. in the various uses and be used.
Next introduce the manufacture method of ceramic condenser 2.
At first, as the dielectric ceramic composition raw material that uses, can suitably select to become all cpds of composite oxides and oxide compound, for example carbonate, nitrate, oxyhydroxide, organometallic compound etc. also can mix use.The median size of dielectric ceramic composition raw material is generally 1.0-5.0 μ m, is preferably 2.0-3.0 μ m.
According to desirable ratio of components, weighing also cooperates the main component raw material and the submember raw material, utilizes ball mill to carry out wet mixing 10-20 hour, and dry.
This dry thing is carried out pre-burning under 900-1100 ℃.If calcined temperature is too low, then the pre-burning unreacted reactant can be residual, is difficult to obtain desired characteristic, and in addition, if calcined temperature is too high, then pre-burning overreact is difficult to pulverize.
Then, pulverize the pre-burning thing, and add organic binder bond.
Organic binder bond does not limit especially, can use various tackiness agents commonly used such as ethyl cellulose, polyvinyl butyral acetal, acrylic resin, preferably uses PVA (polyvinyl alcohol).
The pre-burning powder that has added organic binder bond is carried out after the granulation, and press molding is that diameter is that 5-16mm, thickness are the disk shape of 0.4-1.2mm.
This shaping thing is burnt till under 1160-1240 ℃, the words that firing temperature is too low, the fully densification of dielectric layer behind the sintering, electrostatic capacity may be not enough, in addition, firing temperature is too high, and dielectric layer is crossed to be burnt till, thus the capacity when applying DC electric field through the time change and tend to become greatly.
The sintered compact of acquisition like this is carried out the printing sintering of copper electrode, further the bonding wire terminal.
So to be installed in tellite by soldering etc. first-class for the ceramic condenser of making of the present invention, is used for various electronic units.
In addition, the invention is not restricted to above-mentioned embodiment, can carry out various changes within the scope of the invention.
For example, dielectric ceramic composition of the present invention goes for the dielectric layer of multi-layer ceramic capacitor.
Introduce the present invention below with reference to detailed embodiment, the invention is not restricted to these embodiment.
Embodiment
Will be as the SrTiO of main component raw material
3, PbO, Bi
2O
3NTiO
2, CaCO
3With CuO, Nb as the submember raw material
2O
5, MnCO
3Behind the sintering, carry out weighing according to the ratio of components shown in the table 1 and cooperate, and carried out wet mixing 16 hours by ball mill.After the drying, carry out pre-burning according to following condition.
Heat-up rate: 200 ℃/hour
Keep temperature: 1060 ℃
Hold-time: 2 hours
Atmosphere: in the air.
Then, pulverize the pre-burning thing, add by the polyvinyl alcohol organic binder bond, press molding is that diameter is that 11.0mm, thickness are the disk shape of 11mm behind the granulating.Burning till this shaping thing in following condition.
Heat-up rate: 200 ℃/hour
Keep temperature: 1200 ℃
Hold-time: 2 hours
Atmosphere: in the air.
On the two sides of the sintered compact that so obtains, in reducing atmosphere, carry out copper electrode printing sintering, make the sample of electrical condenser, be used as the test sample.
Measure the electrical characteristic (relative permittivity ε s, dielectric loss tan δ, specific inductivity temperature profile velocity of variation Δ C/C) of the sample that obtains.Measuring method as follows.
Relative permittivity (ε s), under 25 ℃ of the reference temperatures, utilize digital LCR survey meter (YHP company make 4274A), be that 1kHz, incoming signal level (measuring voltage) are measurement of electrostatic capacity under the condition of 1Vrms in frequency.Calculate relative permittivity by the electrostatic capacity that obtains, electrical condenser sample electrodes size and interelectrode distance.Relative permittivity is being good more than 2000.
Dielectric loss (tan δ), under 25 ℃ of the reference temperatures, utilize digital LCR survey meter (YHP company make 4274A), be that 1kHz and 100kHz, incoming signal level (measuring voltage) are measured under the condition of 1Vrms in frequency.Dielectric loss tan δ under the 1kHz is promptly good below 0.4%, and the dielectric loss tan δ under the 100kHz is promptly good below 0.3%.
Specific inductivity temperature profile velocity of variation (Δ C/C)), with 20 ℃ specific inductivity be benchmark, right-25 ℃ ,+85 ℃ and+125 ℃ measure.-25 ℃ and+85 ℃ down for ± 15% in, be good for ± 30% with in down at+125 ℃.
Measuring result is shown in Table 1.In this table, specimen coding is marked with
*Sample be comparative example of the present invention.
Table 1
| Specimen coding | Main component (weight %) | Submember (weight %) | Relative permittivity | Dielectric loss (%) | Specific inductivity temperature profile velocity of variation (%) | |||||||||
| SrTiO 3 | PbTiO 3 | Bi 2O 3- nTiO 2 | n | CaTiO 3 | CuO | Nb 2O 5 | MnO | ε s | tanδ (1kHz) | tanδ (100kHz) | -25℃ | +85℃ | +125℃ | |
| 1 | 42.96 | 20.93 | 25.15 | 3.0 | 10.96 | 0.2 | 0.2 | 0.1 | 2020 | 0.2 | 0.3 | +3.8 | -6.9 | -20.0 |
| *2 | 47.57 | 17.59 | 25.37 | 3.0 | 9.47 | 0.2 | 0.2 | 0.1 | 1830 | 0.1 | 0.2 | +3.3 | -12.5 | -27.3 |
| 3 | 42.14 | 23.97 | 24.68 | 3.0 | 9.21 | 02 | 0.2 | 0.1 | 2546 | 0.1 | 0.3 | +2.6 | -11.9 | -26.9 |
| *4 | 40.83 | 25.50 | 24.52 | 3.0 | 9.15 | 0.2 | 0.2 | 0.1 | 2630 | 0.2 | 0.4 | +1.5 | -10.3 | -26.1 |
| 5 | 40.28 | 24.10 | 24.81 | 3.0 | 10.81 | 0.2 | 0.2 | 0.1 | 2150 | 0.1 | 0.3 | +2.9 | -6.1 | -20.4 |
| 6 | 43.64 | 2288 | 24.75 | 3.0 | 8.73 | 0.2 | 0.2 | 0.1 | 2240 | 0.2 | 0.2 | -0.8 | -12.1 | -26.3 |
| 7 | 43.64 | 22.88 | 24.75 | 2.5 | 8.73 | 0.2 | 0.2 | 0.1 | 2030 | 0.2 | 0.2 | +1.1 | -10.1 | -23.3 |
| 8 | 43.64 | 22.88 | 24.75 | 3.5 | 8.73 | 0.2 | 0.2 | 0.1 | 2340 | 0.3 | 0.3 | -2.5 | -14.4 | -27.9 |
| *9 | 43.92 | 21.88 | 24.90 | 3.0 | 9.30 | 0.2 | 0 | 0.1 | 2250 | 0.3 | 0.5 | -1.5 | -10.5 | -24.3 |
| 10 | 43.92 | 21.88 | 24.90 | 3.0 | 9.30 | 0.2 | 0.2 | 0.1 | 2110 | 0.2 | 0.2 | -0.5 | -10.7 | -24.9 |
| 11 | 43.92 | 21.88 | 24.90 | 3.0 | 9.30 | 0.2 | 0.5 | 0.1 | 2030 | 0.2 | 0.2 | +1.2 | -11.0 | -25.4 |
| *12 | 43.92 | 21.88 | 24.90 | 3.0 | 9.30 | 0.2 | 1.0 | 0.1 | 1870 | 0.1 | 0.2 | +1.4 | -11.8 | -26.7 |
| *13 | 44.82 | 20.82 | 25.02 | 3.0 | 9.34 | 0 | 0.2 | 0.1 | 2850 | 0.5 | 0.8 | -5.6 | -18.1 | -36.9 |
| 14 | 44.82 | 20.82 | 25.02 | 3.0 | 9.34 | 0.2 | 0.2 | 0.1 | 2320 | 0.1 | 0.3 | -1.3 | -14.0 | -29.5 |
| 15 | 44.82 | 20.82 | 25.02 | 3.0 | 9.34 | 0.3 | 0.2 | 0.1 | 2064 | 0.2 | 0.2 | +1.6 | -11.8 | -25.5 |
| *16 | 44.82 | 20.82 | 25.02 | 3.0 | 9.34 | 0.6 | 0.2 | 0.1 | 1880 | 0.5 | 0.4 | +4.3 | -10.6 | -22.4 |
| *17 | 44.82 | 20.82 | 25.02 | 3.0 | 9.34 | 1.0 | 0.2 | 0.1 | 1000 | 0.9 | 0.6 | +2.9 | -8.6 | -17.6 |
| *18 | 44.82 | 20.82 | 25.02 | 3.0 | 9.34 | 0.2 | 0.2 | 0 | 2330 | 0.2 | 0.3 | -1.5 | -14.2 | -29.6 |
| 19 | 44.82 | 20.82 | 25.02 | 3.0 | 9.34 | 0.2 | 0.2 | 0.2 | 2210 | 0.2 | 0.2 | -1.2 | -11.6 | -25.1 |
| 20 | 44.82 | 20.82 | 25.02 | 3.0 | 9.34 | 0.2 | 0.2 | 0.5 | 2140 | 0.1 | 0.3 | -0.9 | -10.7 | -23.0 |
| *21 | 55.50 | 19.64 | 16.05 | 3.0 | 8.81 | 0.2 | 0.2 | 0.1 | 1870 | 0.1 | 0.3 | +7.5 | -17.7 | -33.6 |
| *22 | 46.67 | 20.71 | 24.88 | 3.0 | 7.74 | 0.2 | 0.2 | 0.1 | 2259 | 0.1 | 0.2 | +3.8 | -16.8 | -30.8 |
| *23 | 40.13 | 18.64 | 32.88 | 3.0 | 8.36 | 0.2 | 0.2 | 0.1 | 1790 | 0.2 | 0.7 | +1.6 | -3.1 | -12.8 |
| *24 | 51.13 | 23.75 | 14.46 | 3.0 | 10.65 | 0.2 | 0.2 | 0.1 | 2280 | 0.1 | 0.9 | +12.6 | -17.3 | -38.2 |
| *25 | 48.21 | 23.50 | 15.99 | 3.0 | 12.30 | 0.2 | 0.2 | 0.1 | 2260 | 0.1 | 0.5 | +7.4 | -13.3 | -28.5 |
| *26 | 38.42 | 22.97 | 28.30 | 3.0 | 10.31 | 0.2 | 0.2 | 0.1 | 2010 | 0.1 | 0.5 | +1.2 | -4.3 | -17.6 |
Obviously find out from table 1, the electrical condenser of embodiment has realized that fully relative permittivity is that dielectric loss is below 0.3% more than 2000 and under 100kHz, and specific inductivity temperature profile velocity of variation satisfies at-25 ℃ and is being in ± 15% under+85 ℃, is down in ± 30% at+125 ℃.
In addition, although sample 18 is comparative examples, also all satisfy the characteristic of relative permittivity, dielectric loss, specific inductivity temperature profile velocity of variation.But, because this sample 18 does not add MnO, so insulation resistance very severe at high temperature.In Fig. 2, show under the situation that the addition of the MnO in dielectric ceramic composition of the present invention changes the graphic representation of the insulation resistance under 125 ℃.Obviously find out from Fig. 2, when not adding MnO, the obvious deterioration of insulation resistance.In addition, show and also can make then insulation resistance deterioration if the addition of MnO is too many.
Except sample 18, though in main component and the submember one under the situation beyond the scope of the present invention, can not satisfy at least one in the above-mentioned characteristic.
Below, the spontaneous heating characteristic of the electrical condenser of measurement sample 9 (comparative example) and sample 10 (embodiment).Measuring condition is: applying voltage is 500V, and frequency is 90kHz.The spontaneous heating temperature is to be tried to achieve by the surrounding temperature of the generation of the capacitor surface temperature after applying.Measuring result as shown in Figure 3.
Find out obviously that from Fig. 3 compare with sample 9 as a comparative example, the spontaneous heating temperature of the sample 10 of embodiment obviously reduces.This is because the value of the tan δ of sample 10 under 100kHz of embodiment is littler than the value of the tan δ of sample 9 under 100kHz.
In addition, when frequency changes to 1000kHz from 1kHz, measure the frequency response characteristic of the tan δ of sample 9 and sample 10.Measuring result is shown in Fig. 4.
Find out obviously that from Fig. 4 at low frequency region, the characteristic of sample 9 (comparative example) is better than sample 10 (embodiment), but owing to curve is represented with logarithm, so numerical value itself does not almost have difference.On the other hand, becoming the high-frequency region of problem, owing to represent that with logarithm have about 1.3 difference, the characteristic of sample 10 (embodiment) is very good.This situation is consistent with the tendency of electrical condenser spontaneous heating temperature shown in Figure 2, can confirm that the loss of electrical condenser in high-frequency region is low according to an embodiment of the invention.
In addition, the continuous variation of the specific inductivity temperature profile velocity of variation of the sample 5 of measurement embodiment and sample 10.Measuring result is shown among Fig. 5.
Find out obviously that from Fig. 5 the whichever sample all satisfies the benchmark value of specific inductivity temperature profile velocity of variation.Near near the variation of sample 10 specific inductivity to+40 ℃ from-40 ℃ is very little, and is better than sample 5.On the other hand, than+50 ℃ more under the high-temperature area, the velocity of variation of sample 5 is little, is good therefore.That is to say, can select only composition, so that specific inductivity temperature profile velocity of variation diminishes according to the use temperature scope.
Thereby, according to the ceramic condenser of the embodiment of the invention,, and can under high level, take into account relative permittivity and specific inductivity temperature profile velocity of variation even also loss is low in high-frequency region.
In addition, even above-mentioned dielectric ceramic composition is carried out copper electrode printing sintering in reducing atmosphere, according to the problem of The above results on also can occurrence features.
Thereby, can use copper as electrode, owing to can be connected, therefore can provide multiduty cheap electrical condenser further with lead terminal.
Claims (5)
1, a kind of dielectric ceramic composition is characterized in that,
As main component, contain:
The SrTiO of 40-54 weight %
3,
The PbTiO of 18-25% weight %
3,
The Bi of 15-30% weight %
2O
3NTiO
2, n represents the compound ratio,
The CaTiO of 8-12 weight %
3
As submember, contain:
With respect to the main component of 100 weight %,
0.1-0.5 the CuO of weight %,
0.05-0.5 the Nb of weight %
2O
5,
0.05-0.5 the MnO of weight %.
2, dielectric ceramic composition according to claim 1 is characterized in that described n is in the 2.5-3.5 scope.
3, a kind of electrical condenser, it has the dielectric layer that comprises dielectric ceramic composition according to claim 1 and 2.
4, electrical condenser according to claim 3 is characterized in that the main component of the terminal electrode that forms is a copper on above-mentioned electrical condenser.
5, electrical condenser according to claim 4, it possesses the lead terminal that engages with described terminal electrode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005284723A JP2007091551A (en) | 2005-09-29 | 2005-09-29 | Dielectric ceramic composition |
| JP2005284723 | 2005-09-29 |
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| Publication Number | Publication Date |
|---|---|
| CN1955143A true CN1955143A (en) | 2007-05-02 |
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ID=37977682
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|---|---|---|---|
| CN 200610164633 Pending CN1955143A (en) | 2005-09-29 | 2006-09-29 | Dielectric ceramic composition |
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| JP (1) | JP2007091551A (en) |
| CN (1) | CN1955143A (en) |
| TW (1) | TW200734282A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102190489A (en) * | 2010-02-25 | 2011-09-21 | Tdk株式会社 | Dielectric ceramic composition and electronic parts |
| CN113248251A (en) * | 2021-05-31 | 2021-08-13 | 福建火炬电子科技股份有限公司 | Ceramic pulse capacitor, dielectric material and preparation method thereof |
-
2005
- 2005-09-29 JP JP2005284723A patent/JP2007091551A/en active Pending
-
2006
- 2006-09-26 TW TW095135513A patent/TW200734282A/en unknown
- 2006-09-29 CN CN 200610164633 patent/CN1955143A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102190489A (en) * | 2010-02-25 | 2011-09-21 | Tdk株式会社 | Dielectric ceramic composition and electronic parts |
| CN102190489B (en) * | 2010-02-25 | 2014-11-05 | Tdk株式会社 | Dielectric ceramic composition and electronic parts |
| CN113248251A (en) * | 2021-05-31 | 2021-08-13 | 福建火炬电子科技股份有限公司 | Ceramic pulse capacitor, dielectric material and preparation method thereof |
| CN113248251B (en) * | 2021-05-31 | 2022-06-10 | 福建火炬电子科技股份有限公司 | Ceramic pulse capacitor, dielectric material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200734282A (en) | 2007-09-16 |
| JP2007091551A (en) | 2007-04-12 |
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