Dielectric ceramic composition and method of production and electronic device of the same

一种介电陶瓷、制造方法的技术，应用在电子部件领域，能够解决难以确认等问题，达到加速寿命提高、抑制低频率介电分散、优异容量温度特性的效果

Active Publication Date: 2006-05-31
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, whether the method of pre-adding the subcomponents or the method of post-adding some or all of the subcomponents is suitable, in addition to confirming each target composition through experiments, even those skilled in the art will not be able to use it if they do not actually use it. However, it is difficult to confirm which method is applicable to systems with different compositions.

Method used

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  • Dielectric ceramic composition and method of production and electronic device of the same
  • Dielectric ceramic composition and method of production and electronic device of the same
  • Dielectric ceramic composition and method of production and electronic device of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] In this example, samples of laminated ceramic capacitors were produced according to the following procedure.

[0116] Preparation of various pastes

[0117] First, starting materials (SrCO 3 , CaCO 3 、TiO 2 , ZrO 2 ) and the 1st to 4th subcomponent raw materials. In this example, carbonate was used as the MnO raw material (the third subcomponent: MnCO 3 ), other raw materials use oxides (1st subcomponent: V 2 o 3 , the second subcomponent: Al 2 o 3 , the fourth subcomponent: (Ba 0.6 Ca 0.4 ) SiO 3 (in the table, denoted as BCG)). In addition, (Ba 0.6 Ca 0.4 ) SiO 3 was produced as follows: BaCO 3 , CaCO 3 and SiO 2 Wet mixing for 16 hours, drying, sintering in the air at 1000-1300°C, and wet pulverization with a ball mill for 100 hours.

[0118] Next, by pre-adding and post-adding the first to fourth subcomponent raw materials, dielectric ceramic composition raw materials (powders) having the final composition are respectively obtained.

[0119] In t...

Embodiment 2

[0148] Capacitor samples were produced in the same manner as in Example 1 except that the pre-added components and post-added components were changed as shown in Table 2, and the same characteristics were evaluated. As a result, all samples had tanδ of 0.01% or less, dielectric constant ε of 45 or more, and resistivity ρ of 1×10 12 A good capacitor of Ωcm. Regarding the temperature characteristic of the electrostatic capacity, the rate of change of the electrostatic capacity with respect to the above temperature also satisfies -3000 to 0 ppm / °C. The average crystal grain size and high temperature load life are shown in Table 2.

[0149] In addition, the pre-added component mentioned in the present invention is a subcomponent raw material added to the starting raw material for producing the main component raw material when producing the calcined raw material containing the main component raw material. The post-added raw material is an auxiliary component raw material added to...

Embodiment 3

[0161] Capacitor samples were produced in the same manner as in Example 1 except that the addition amounts of the first to fourth subcomponents as post-addition components were changed as shown in Table 3, and the same characteristics were evaluated. As a result, all samples had tanδ of 0.01% or less, dielectric constant ε of 45 or more, and resistivity ρ of 1×10 12 A good capacitor of Ωcm. Regarding the temperature characteristic of the electrostatic capacity, the rate of change of the electrostatic capacity with respect to the above temperature also satisfies -3000 to 0 ppm / °C. The average crystal grain size and high temperature load life are shown in Table 3.

[0162] In addition, the post-addition component mentioned in this Example is a subcomponent raw material added to the calcined raw material containing a main component raw material.

[0163] sample

Amount of post-added ingredients added

characteristics

1st sub-ingredient

V 2 o 5 conv...

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Abstract

The present invention provides a method for producing a dielectric ceramic composition, wherein the dielectric ceramic composition contains the following components in a specific ratio: a main component containing a dielectric oxide having a specific composition, the main component can provide a Method for producing reduction-resistant dielectric ceramic composition with frequency dielectric characteristics and accelerated life of insulation resistance further improved, containing V oxide as the first subcomponent, Al oxide as the second subcomponent, and Mn oxide The 3rd subcomponent, and the 4th subcomponent containing a specific sintering aid; the method includes the following steps: removing at least one or two other subcomponents of the raw material of the 3rd subcomponent and the raw material of the 4th subcomponent A step of preparing a pre-reaction raw material by mixing at least a part of the component raw material with the starting raw material prepared to obtain the main component raw material; a step of reacting the prepared pre-reaction raw material to obtain a post-reaction raw material; and in the obtained post-reaction raw material , the process of mixing the auxiliary component raw materials removed when preparing the raw materials before the reaction to obtain the dielectric ceramic composition raw materials.

Description

technical field [0001] The present invention relates to a dielectric ceramic composition used, for example, as a dielectric layer of a multilayer ceramic capacitor, a method for producing the same, and an electronic component using the dielectric ceramic composition as a dielectric layer. Background technique [0002] In recent years, as a dielectric ceramic composition constituting a dielectric layer of a multilayer ceramic capacitor as an example of an electronic component, various proposals have been made to use inexpensive base metals (such as nickel and copper, etc.) for internal electrode materials. (For example, refer to Patent Document 1: Japanese Unexamined Publication No. Hei 11-224827, Patent Document 2: Japanese Unexamined Publication No. 60-131708, Patent Document 3: Japanese Unexamined Publication No. 57-37081, Patent Document 4: Japanese Unexamined Clear 63- Bulletin No. 126117). [0003] However, with any dielectric ceramic composition, the dielectric charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/46C04B35/465C04B35/47C04B35/48H01B3/12H01G4/06H01G4/12H01G4/30
CPCB32B2311/22C04B35/465C04B35/47C04B35/49C04B35/62685C04B35/64C04B2235/3203C04B2235/3206C04B2235/3208C04B2235/3213C04B2235/3215C04B2235/3217C04B2235/3224C04B2235/3232C04B2235/3239C04B2235/3241C04B2235/3244C04B2235/3251C04B2235/3256C04B2235/3258C04B2235/3262C04B2235/3409C04B2235/3418C04B2235/3436C04B2235/3445C04B2235/3454C04B2235/5445C04B2235/6582C04B2235/6584C04B2235/662C04B2235/785C04B2235/786C04B2235/96C04B2237/346C04B2237/348C04B2237/405H01G4/1218H01G4/30C04B35/46C04B35/48H01B3/12
Inventor 渡边康夫远藤健太高原弥
Owner TDK CORPARATION
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