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Dielectric composition and electronic component

一种介电组合物、化合物的技术，应用在固定电容的零部件、电气元件、固定电容器电极等方向，能够解决介电组合物含铅等问题，达到温度特性良好、减小介电损失、提高相对介电常数和直流击穿电压的效果

Active Publication Date: 2019-10-11
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the dielectric composition contains lead, it is problematic from the viewpoint of environmental load

Method used

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  • Dielectric composition and electronic component
  • Dielectric composition and electronic component
  • Dielectric composition and electronic component

Examples

Experimental program
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Embodiment

[0083] Hereinafter, the present invention will be described based on more detailed examples, but the present invention is not limited to these examples.

[0084] (Example and Comparative Example)

[0085] As raw material powders, barium titanate powder, strontium titanate powder, bismuth calcium titanate powder, bismuth oxide powder, titanium oxide powder and calcium carbonate powder, and the above-mentioned first subcomponent and second subcomponent by firing are prepared. The powder was weighed so that the compositions of Examples and Comparative Examples described in Table 1 were finally obtained. In addition, BT in Table 1 means barium titanate (BaTiO 3 ), ST means strontium titanate (SrTiO 3 ), CBT means calcium bismuth titanate (CaBi 4 Ti 4 o 15 ). Nb / (Mn+Cr+Fe) represents the total weight of the second subcomponent relative to the first subcomponent (MnCO 3 +Fe 2 o 3 +Cr 2 o 3 ) weight ratio Nb 2 o 5 / (MnCO 3 +Fe 2 o 3 +Cr 2 o 3 ). In addition, in sam...

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Abstract

The invention provides a dielectric composition and an electronic component. The dielectric composition is made without lead in nature, temperature characteristics, relative dielectric constants, heating characteristics and alternating current breakdown voltage are good, and dielectric loss is low at normal temperature. The dielectric composition takes a mol% of barium titanate, b mol% of strontium titanate and c mol% of bismuth calcium titanate as main components (a+b+c=100) and comprises auxiliary components, a, b and c are selected from values in the range, 50<=a<=83, 12<=b<=49.5, 0.5<=c<=5, and a first auxiliary component comprises at least one of a manganese-containing compound, an iron-containing compound and a chromium-containing compound. Compared with the weight ratio of 100% of the main components, MnCO3, Fe2O3 and Cr2O3 serving as the first auxiliary component accounts for 0.2wt% or more and 3wt% or less of the weight of the main components, the second auxiliary component comprises a niobium-containing compound, and Nb2O5 serving as the second auxiliary component accounts for 0.1wt% or more and 3wt% or less of the weight of the main components.

Description

technical field [0001] The present invention relates to dielectric compositions and electronic components. Background technique [0002] In recent years, along with the rapidly advancing performance of electrical equipment, the miniaturization and complexity of circuits have also rapidly progressed. Therefore, further miniaturization and performance enhancement of electronic components are also required. That is, in order to maintain good temperature characteristics and maintain capacitance when miniaturized, a dielectric combination with high dielectric constant, low loss, low heat generation during operation, and high DC breakdown voltage that can be used at high voltages is sought. objects and electronic components. [0003] In order to meet the above requirements, PbTiO is described in Reference 1 3 -SrTiO 3 -Bi 2 Ti 3 o 9 system of dielectric compositions. However, since the dielectric composition contains lead, it is problematic from the viewpoint of environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622H01G4/12
CPCC04B35/468C04B35/622H01G4/1218H01G4/1227C04B2235/3234C04B2235/80C04B35/4682C04B2235/3236C04B2235/3213C04B2235/3208C04B2235/3298C04B2235/3272C04B2235/3262C04B2235/3241C04B2235/3251C04B2235/96C04B2235/5436C04B2235/5445C04B2235/6567C04B35/63416C04B35/6261C04B35/62695H01G4/008C04B35/64C04B2235/3232C04B2235/442C04B2235/602
Inventor 梁丽苹刘海龙大津大辅
Owner TDK CORPARATION