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Dielectric ceramic composition and dielectric element

A technology of dielectric ceramics and compositions, applied in electrical components, ceramics, components of fixed capacitors, etc., can solve the problems of good DC bias characteristics and large bias change rate.

Active Publication Date: 2018-03-02
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, in the BCT-type dielectric ceramic composition shown in Patent Document 2, since the relative permittivity is as large as 2500 or more, but the DC bias change rate of 5 V / μm is as large as within -70%, it cannot be said that Good DC bias characteristics

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  • Dielectric ceramic composition and dielectric element
  • Dielectric ceramic composition and dielectric element
  • Dielectric ceramic composition and dielectric element

Examples

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Embodiment 1～26、 comparative example 1～16

[0084] In order to make a dielectric ceramic composition, bismuth oxide (Bi 2 O 3 ), sodium carbonate (Na 2 CO 3 ), potassium carbonate (K 2 CO 3 ), barium carbonate (BaCO 3 ), titanium oxide (TiO 2 ) And niobium oxide (Nb 2 O 5 ) Of the powder. For Example 15 in addition to the above, lithium carbonate (Li 2 CO 3 ) Of the powder. For Examples 16, 17, in addition to the above, potassium carbonate (K 2 CO 3 ) Of the powder.

[0085] The above-mentioned powder raw materials were weighed so that the dielectric ceramic composition (sintered body) after the main firing satisfies the composition of Table 1. In addition, here, a, b, c, d, s+u, t, v, and x in Table 1 respectively represent a, b, c, d, s+u, t, in the following general formula (1) The value of v and x. For the examples and comparative examples other than Examples 15 to 17, the A component is Na, the A component of Example 15 is Li, the A component of Example 16 is K, and the A of Example 17 is Na and K.

[0086] {[(Bi s N...

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Abstract

The present invention relates to a dielectric ceramic composition which is complex oxides represented by the following formula (1), {[(Bi s Na t ) a (Bi u K v ) b Ba c ] 1-d A d } x Ti 1-d Nb d O 3 (1), wherein, in formula (1), A represents at least one element selected from the group consisting of Li, Na and K, and a, b, c, d, s, t, u, v and x are numbers respectively satisfying the following formulae, 0.10‰¤a<0.95, 0.00<b‰¤0.85, 0.05‰¤c‰¤0.70, a+b+c=1, 0.10‰¤d‰¤0.50, 0.90‰¤s+u‰¤1.00, 0.45‰¤t‰¤0.50, 0.45‰¤v‰¤0.50 and 0.95‰¤x‰¤1.05.

Description

Technical field [0001] The present invention relates to a dielectric ceramic composition and an electronic component using the dielectric ceramic composition, and more specifically relates to a dielectric ceramic composition and a dielectric component suitable for medium and high voltage applications with relatively high rated voltage. Background technique [0002] In recent years, with the increase in the density of electronic circuits, the demand for the miniaturization of electronic components has increased, and the miniaturization and large-capacity of multilayer ceramic capacitors have been rapidly developed. As a result, the applications have also expanded and the required characteristics have also been varied. . [0003] For example, it is used in ECM [engine electric computer module (engine electric computer module)], fuel injection device, electronic control throttle valve, frequency converter, converter, high intensity discharge headlamp unit (HID headlamp unit), hybrid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/12C04B35/468C04B35/475H01G4/12H01G4/30
CPCH01G4/1227C04B35/4682C04B35/475C04B35/495C04B2235/3201C04B2235/3203C04B2235/3215C04B2235/3232C04B2235/3251C04B2235/3298H01B3/12H01G4/1218H01G4/30
Inventor 井村友哉田内刚士古川正仁
Owner TDK CORPARATION