This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, in the technique of Patent Document 12, since Ca is completely dissolved in barium titanate, although the dielectric constant is high, good temperature characteristics cannot be exhibited.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0221] Manufacture of Dielectric Raw Materials
[0222] First, barium titanate raw materials and auxiliary component raw materials are prepared. BaTiO with an average particle size of 0.25 μm is used as the barium titanate raw material 3 (hereinafter referred to as BT). MgO, MnO, and V with an average particle size of 0.01 to 0.1 μm are used as subcomponent raw materials 2 o 5 , (Ba 0.6 Ca 0.4 ) SiO 3 (hereinafter referred to as BCG), Y 2 o 3 , Yb 2 o 3 , and CaZrO as Ca raw material 3 . BCG is manufactured as follows: BaCO 3 , CaCO 3 , SiO 2 Wet mixed for 16 hours, dried, sintered in air at 1150°C, and then wet pulverized with a ball mill for 100 hours. CaZrO 3 Manufactured as follows: Wet mixing CaCO with a ball mill 3 , ZrO 3 After 16 hours of drying, it was sintered in the air at 1150°C, and wet pulverized by a ball mill for 24 hours.
[0223] Next, these raw materials are weighed, and the composition after sintering is 0.9 mol of MgO, 0.37 mol of MnO...
Embodiment 2
[0261] In addition to using CaCO as Ca raw material 3 , Ca-Y-Si-O, and the sample 4 (CaZrO 3 ) Similarly, the same evaluation as in Example 1 was performed. The results are shown in Table 2.
[0262] Table 2
[0263] sample
Number
Ca raw material
calcined
sintering
Grain
Capacitor sample
IR temperature
dependency
maintain temperature
(℃)
time
(h)
maintain temperature
(℃)
time
(h)
*Average depth T of Ca diffusion region
(%)
*Average depth of Mg diffusion zone
(%)
at 150°C
Capacity change rate %)
×8R
Dielectric
constant
type
add method
11
Example
CaCO 2
Solid Phase
700
5
1240
6
30
16.4
-8.9
◎
1350
-1.87
4
Example
CaZrO 3
Solid Phase
700
5
1240
6
23
16.4
...
Embodiment 3
[0268] The same evaluation as in Example 1 was performed in the same manner as in Sample 4 (6 hours) in Example 1 except that the sintering time was changed to 0.5 hours, 2 hours, 15 hours, and 30 hours. The results are shown in Table 3.
[0269] table 3
[0270] sample
Number
Ca raw material
calcined
sintering
Grain
Capacitor sample
IR temperature
dependency
maintain temperature
(℃)
time
(h)
maintain temperature
(℃)
time
(h)
*Average depth T of Ca diffusion region
(%)
*Average depth of Mg diffusion zone
(%)
at 150°C
Capacity change rate (%)
×8R
Dielectric
constant
type
add method
21
comparative example
CaZrO 2
Solid Phase
700
5
1240
30
43.1
18.1
-20.1
×
1326
-2.46
22
Example
CaZrO 3
Solid Phase
700...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
particle diameter
aaaaa
aaaaa
particle diameter
aaaaa
aaaaa
particle diameter
aaaaa
aaaaa
Login to view more
Abstract
An object of the invention is to provide a multilayer ceramic capacitor having high dielectric constant, good temperature characteristic, and an improved IR temperature dependency. According to the present invention, a capacitor device body 10, wherein dielectric layers 2 comprising dielectric ceramic composition and internal electrode layers 3 are alternately laminated, characterized in that said dielectric ceramic composition comprises a plural number of crystal particles 2a wherein said crystal particles 2a form Ca dispersing area 25a wherein at least said Ca is dispersed from the surface to inside of crystal particles, and when considering crystal particles 2a having an average particle diameter of D50, an average depth T of said Ca dispersing area is controlled within a range of 10 to 30% with respect to the average particle diameter of D50, is provided.
Description
technical field [0001] The present invention relates to a dielectric ceramic composition having reduction resistance, and electronic components such as a multilayer ceramic capacitor using the dielectric ceramic composition. Background technique [0002] In multilayer ceramic capacitors used as electronic components, in addition to high dielectric constant, long life of insulation resistance IR, good DC bias characteristics (less change in dielectric constant over time), good temperature characteristics are also required, especially , According to the application, the temperature characteristics are required to be flat under severe conditions. In recent years, ceramic capacitors have been used in various electronic devices such as engine electronic control units (ECUs), crank angle sensors, and anti-lock braking system (ABS) modules mounted in the engine compartment of automobiles. Since these electronic devices are used to stably perform engine control, drive control, and ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more