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Problems solved by technology
[0012] Although any of the above-mentioned patent documents 8 to 11 has a high dielectric constant, satisfies the X8R characteristics, and can be sintered in a reducing atmosphere, the IR temperature dependence from room temperature to high temperature is not good, and it is difficult to make a product. use
Method used
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Embodiment 1
[0148] In the examples, samples of multilayer ceramic capacitors were produced through the procedures shown below.
[0149] Preparation of each paste
[0150] First, the starting materials (BaCO 3 , CaCO 3 、TiO 2 ) and the first to sixth subcomponent raw materials. In this example, carbonate (secondary component: MgCO 3 , the third sub-component: MnCO 3 ), using oxides in other raw materials (the first subcomponent: Y 2 o 3 、Dy 2 o 3 or Ho 2 o 3 , the fourth sub-component: Al 2 o 3 , the fifth secondary component: V 2 o 5 , the sixth secondary component: (Ba 0.6 Ca 0.4 ) SiO 3 (indicated as BCG in the table)). In addition, (Ba 0.6 Ca 0.4 ) SiO 3 by using a ball mill to BaCO 3 , CaCO 3 and SiO 2 It was wet-mixed for 16 hours, dried, sintered in air at a temperature of 1150° C., and wet-pulverized by a ball mill for 100 hours.
[0151] Next, the starting material for preparing the main component and the first subcomponent raw material (Y 2 o 3 、Dy 2...
Embodiment 2
[0207] Capacitor samples were produced in the same manner as in Example 1 except that the type and content of the fourth subcomponent raw material were changed as shown in Tables 4 to 7, and the same evaluation was performed.
[0208] Table 4
[0209]
[0210] Samples marked with [*] represent comparative examples of the present invention.
[0211] Samples marked with [**] represent reference examples of the present invention.
[0212] Among them, the composition of the main component, the composition and addition amount of the first to third, fifth, and sixth subcomponents are the same as those in Table 1.
[0213] The fourth subcomponent: Cr 2 o 3
[0214] table 5
[0215]
[0216] Samples marked with [*] represent comparative examples of the present invention.
[0217] Samples marked with [**] represent reference examples of the present invention.
[0218] Among them, the composition of the main component, the composition and addition amount of the first to...
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Abstract
The present invention provides a dielectric ceramic composition comprising: a main component comprising a dielectric oxide represented by the composition formula {(Me1-xCax)O}m (Zr1-yTiy)O2, wherein Me is one of Sr, Mg and Ba At least one of m, x and y has the relationship of 0.995≤m≤1.020, 0<x≤0.15, 0≤y≤1.00; contains the first subcomponent of R oxide (wherein R is a rare earth point element); The second subcomponent containing Mg oxide; the third subcomponent containing Mn oxide; wherein the ratio of each subcomponent to 100mol of the main component is: first subcomponent: 0.1 ~ 6mol; second subcomponent: 1 ~ 5mol ; The third subcomponent: 0.1 ~ 2.5mol; The dielectric ceramic composition also contains A oxide (wherein, A is at least one selected from the group of cationic elements with an effective ionic radius of 0.065nm ~ 0.085nm at the time of 6 coordination ) as the fourth subcomponent.
Description
technical field [0001] The present invention relates to a dielectric ceramic composition having reduction resistance, and electronic components such as multilayer ceramic capacitors using the dielectric ceramic composition. Background technique [0002] Multilayer ceramic capacitors as electronic components are required to have high dielectric constant, long life of insulation resistance IR, good DC bias characteristics (less change in dielectric constant over time), good temperature characteristics, especially In terms of applications, flat temperature characteristics are required under harsh conditions. In recent years, multilayer ceramic capacitors have begun to be used in various electronic devices such as engine electronic control units (ECUs), crank angle sensors, and anti-lock braking system (ABS) modules installed in automobile engines. Since these electronic devices are used to safely and stably perform engine control, drive control, and brake control, good tempera...
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