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Dielectric composition with improved uniformity and insulation resistance, its preparing method and multi-layer ceramic capacitor using same

A technology of dielectric composition and insulation resistance, which is applied in the direction of laminated capacitors, capacitors, fixed capacitors, etc., and can solve problems such as enlarged grain size, large grain size of dielectric composition, and electrode fracture

Inactive Publication Date: 2003-12-03
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this patent is that the grain size of the dielectric composition bonded by the sintering aid is large
[0013] In addition, because the conventional dielectric composition is fired at 1200°C or higher, even if a high dielectric constant is obtained, the high temperature causes the electrode to break
In addition, the grain size in the dielectric composition becomes larger, limiting the application of this compound in ultra-thin multilayer ceramic capacitors

Method used

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  • Dielectric composition with improved uniformity and insulation resistance, its preparing method and multi-layer ceramic capacitor using same
  • Dielectric composition with improved uniformity and insulation resistance, its preparing method and multi-layer ceramic capacitor using same
  • Dielectric composition with improved uniformity and insulation resistance, its preparing method and multi-layer ceramic capacitor using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Mix barium carbonate, calcium carbonate, zirconium, titanium oxide, yttrium, vanadium, manganese dioxide powder, after drying, heat treatment in an electric furnace at 1050°C for 4 hours, and sinter the main components and auxiliary components at the same time to obtain a dielectric Composition (Ba 1-x-y Ca x Y y ) m (Ti 1-a-b-c Zr a mn b V c )O 3+m (hereinafter referred to as "BCYTZMV").

[0086] In the dielectric composition BCYTZMV, x is the mole fraction of calcium, y is the mole fraction of yttrium, a is the mole fraction of zirconium, b is the mole fraction of manganese, and c is the mole fraction of vanadium, as shown in Table 1.

[0087] In Table 1, No. 5 dielectric component is obtained by first sintering the oxides of barium carbonate, calcium carbonate, zirconium and titanium as the main components, and then mixing them with auxiliary components.

[0088] The average particle size of the BCYTZMV powder sintered in this way is 0.6 micron (detected by ...

Embodiment 2

[0100] The preparation method of each dielectric composition shown in Table 2 is the same as that in Example 1, and their electrical properties are tested at room temperature, and the results are shown in Table 2.

[0101] sample

No

(Ba 1-x-y Ca x A y ) m

(Ti 1-z-b-c Zr a B' b B″ c )O m+3

Burning aid

(LS)

Dielectric

constant

DF

(%)

Resistivity

(×10 13 Ω)

A

B′

B″

x

y

a

B

c

z

state

6

0.05

0.0064

0.175

0.0054

0.003

0.5

synthetic phase

13846

0.498

22.26

Dy

mn

V

7

0.05

0.0066

0.175

0.0054

0.002

0.5

synthetic phase

13474

0.535

12.59

Er

mn

V

8

0.05

0.0060

0.175 ...

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PUM

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Abstract

Disclosed is a dielectric composition, which is advantageous in light of increased homogeneity and insulation resistance, a method of preparing the same and a multi-layer ceramic capacitor using the same. The dielectric composition consists of a dielectric component represented by (Ba1-x-yCaxAy)m(Ti1-a-b-cZraB'bB''c)O3+m, (wherein, 0.01<=x<=0.10, 0.003<=y<=0.015, 0.16<=a<=0.20, 0.003<=b<=0.015, 0<=c<=0.015, 1.000<=m<=1.010; the component A is selected from among Y oxides, La oxides, Ho oxides, Dy oxides, Er oxides, Hf oxides and combinations thereof; the component B' is selected from among Mn oxides, Co oxides, Ni oxides and combinations thereof; and the component B'' is selected from among V oxides, Nb oxides, Ta oxides and combinations thereof), and a sintering aid represented by zLi2O-2(1-z)SiO2(0<=Z<=0.9).

Description

field of invention [0001] In general, the present invention relates to a dielectric composition, especially a dielectric composition that improves uniformity and insulation resistance, the dielectric composition includes a sintered main component and an auxiliary component, and the particle size is controlled by adding a sintering aid separately; A method of preparing the dielectric composition and a multilayer ceramic capacitor using the dielectric composition. Background technique [0002] In general, BaCO 3 , CaCO 3 、TiO 2 and ZrO 2 as the main component, synthesized by solid-state reaction (Ba 1-x Ca x ) m (Ti 1-y Zr y )O 3+m The mixture is used as a high dielectric constant material with Y5V temperature characteristics; and various additives are used as auxiliary components to improve electrical properties. [0003] In this regard, barium titanate (BaTiO 3 ), barium zirconate (BaZrO 3 ), calcium titanate (CaTiO 3 ) and calcium zirconate (CaZrO 3 ) The main...

Claims

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Application Information

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IPC IPC(8): C04B35/49C04B35/468H01B3/12H01G4/12
CPCC04B2235/3239C04B2235/3267C04B2235/5445C04B35/6303C04B2235/36C04B2235/3215C04B2237/704C04B2235/79C04B35/468C04B2235/3279C04B2235/96C04B2237/346C04B2235/3203C04B2235/3224C04B2235/3418C04B2235/652B32B2311/22C04B2235/3208C04B35/4682C04B2235/3251C04B2237/405C04B2235/3227C04B2235/786C04B2235/656B32B2309/12H01G4/1227C04B2235/3225B32B18/00C04B2235/3236C04B2235/3244C04B2235/3275H01G4/12
Inventor 张东圭许康宪孙熙荣
Owner SAMSUNG ELECTRO MECHANICS CO LTD
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