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Dielectric ceramic composition and electronic device

A technology of ceramic composition and electronic components, applied in the direction of fixed capacitor dielectrics, ceramics, components of fixed capacitors, etc., can solve problems such as difficulty in maintaining high electrostatic capacity, low dielectric loss and high AC breakdown voltage, and achieve temperature characteristics and sintering. Good properties, high relative permittivity, and low dielectric loss

Active Publication Date: 2013-12-18
TDK CORPARATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, existing BaTiO 3 -BaZrO 3 -CaTiO 3 -SrTiO 3 Due to the ferroelectricity of this type of ceramic composition, it is difficult to maintain high capacitance and low dielectric loss and ensure high AC breakdown voltage

Method used

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  • Dielectric ceramic composition and electronic device
  • Dielectric ceramic composition and electronic device
  • Dielectric ceramic composition and electronic device

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Embodiment

[0071] The present invention will be further described below based on detailed examples, but the present invention is not limited to these examples.

[0072] Sample 1~58

[0073] As the main component raw material, barium carbonate (BaCO 3 ), calcium carbonate (CaCO 3 ), strontium carbonate (SrCO 3 ), titanium oxide (TiO 2 ), zirconia (ZrO 2 ) and tin oxide (SnO 2 ). The main component raw material, ZnO as the first subcomponent raw material, and ZnO as the second subcomponent raw material were respectively prepared so that the composition after firing became the composition shown in Samples 1 to 73 shown in Tables 1 to 4. Rare earth additives are weighed, and the raw material complex is wet-stirred and mixed with a ball mill for 3 hours. After dehydration and drying, it is pre-calcined at a temperature of 1170-1210° C. to cause a chemical reaction.

[0074] In addition, regarding the raw materials of the third subcomponent such as ZnO as the first subcomponent and ox...

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Abstract

The invention provides a dielectric ceramic composition having high relative dielectric constant and AC breakdown voltage, low dielectric loss, good temperature characteristic and good sintering characteristic. The dielectric ceramic composition is provided with a main ingredient expressed by a formula of (Ba1-x-y, Cax, Sry)m(Til-z-a, Zrz, Sna), a first auxiliary ingredient, a second auxiliary ingredient, and a third auxiliary ingredient. 0.03<=x<=0.30; 0.00<=y<=0.05; 0.02<z<=0.2; 0<=a<=0.2; 0.04<=z+a<0.3; 0.97<=m<=1.03. The first auxiliary ingredient is zinc oxide, the second auxiliary ingredient is at least one oxide of the La, Pr, Pm, Nd, Sm, Eu, Gd, and Y, and the third auxiliary ingredient is at least one oxide of A1, Ga, In, Mg, Cu, Ni, Co, Fe, and Si. Compared to the 100 wt% of the main ingredient, the first auxiliary ingredient is 0.45-10 wt%, the second auxiliary ingredient is more than 0.0 wt%, and is less than 0.3 wt% by taking the oxide for matrixing, and the third auxiliary ingredient is 0.02-1.5wt% by taking the oxide for matrixing.

Description

technical field [0001] The present invention relates to dielectric ceramic compositions and electronic components. Background technique [0002] In recent years, the miniaturization and complexity of circuits are rapidly progressing along with the rapid development of high performance electrical equipment. Therefore, further miniaturization and performance enhancement of electronic components are required. That is, while maintaining good temperature characteristics, it is necessary to increase the relative permittivity in order to maintain the electrostatic capacity even if it is miniaturized, and furthermore, in order to use it at a high voltage, a dielectric ceramic composition and an electronic component with a high AC breakdown voltage are required. . [0003] Hitherto, as a high-permittivity dielectric ceramic composition widely used as ceramic capacitors, multilayer capacitors, high-frequency capacitors, and high-voltage capacitors, it is known that BaTiO 3 -BaZrO ...

Claims

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Application Information

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IPC IPC(8): C04B35/49H01G4/12
CPCC04B35/457C04B35/465C04B35/48H01B3/12
Inventor 大津大辅阿部贤广瀬正和梅田裕二
Owner TDK CORPARATION
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