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Coarse ceramic powder and its manufacturing method, dielectric ceramics made of coarse ceramic powder and single chip ceramic electronic element using dielectric ceramics

A technology of dielectric ceramics and coarse ceramics, applied in the field of monolithic ceramic electronic components, which can solve the problems of changing the softening temperature of glass and not fully realizing sintering aids

Inactive Publication Date: 2005-09-21
MURATA MFG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Components that change electrical properties react preferentially with glass components, and thus it is impossible to obtain a satisfactory property modification effect, or can change the softening temperature of glass, so it does not fully realize its function as a sintering aid

Method used

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  • Coarse ceramic powder and its manufacturing method, dielectric ceramics made of coarse ceramic powder and single chip ceramic electronic element using dielectric ceramics
  • Coarse ceramic powder and its manufacturing method, dielectric ceramics made of coarse ceramic powder and single chip ceramic electronic element using dielectric ceramics
  • Coarse ceramic powder and its manufacturing method, dielectric ceramics made of coarse ceramic powder and single chip ceramic electronic element using dielectric ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] (Synthesis of the second organometallic compound which is soluble in an organic solvent and contains a metal element for improving sinterability)

[0048] First, lithium acetate, barium acetate, calcium acetate, and strontium acetate were prepared as starting materials and weighed to satisfy the molar ratio of each metal atom shown in Table 1 below. The initial raw material thus prepared was added to a beaker preliminarily filled with an organic solvent, trihydroxypropane (THP), and heated to 200° C. to dissolve it, thereby starting the reaction. After the reaction was completed, the solution was cooled to room temperature, and silica sol and titanium isopropoxide were added to satisfy the molar ratios of the respective metal atoms shown in Table 1. It is then heated to 200°C to produce a second organometallic compound solution.

[0049] Table 1

Si

Li

Ba

Ca

Sr

Ti

1.00

1.20

0.16

0.12

0.12

0.08

...

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Abstract

A method for making a raw ceramic powder includes the steps of mixing and pulverizing a basic powder, a first organic metal compound containing a metallic element for modifying the electrical characteristics of the basic powder, a second organic metal compound containing a metallic element for improving the sinterability of the basic powder, and an organic solvent, to form a slurry, the first organic metal compound and the second organic metal compound being soluble in the organic solvent; removing the organic solvent from the slurry to obtain the basic powder, the surfaces of the particles of the basic powder being coated with the first organic metal compound and the second organic metal compound; and heat-treating the basic powder at a temperature higher than the decomposition temperature of the first organic metal compound and lower than the decomposition temperature of the second organic metal compound.

Description

technical field [0001] The present invention relates to a method for producing coarse ceramic powder, coarse ceramic powder, dielectric ceramics manufactured using the coarse ceramic powder, and monolithic ceramic electronic components using the dielectric ceramic. Background technique [0002] With the miniaturization of monolithic ceramic capacitors, the thickness of the dielectric ceramic layer has been reduced to approximately about 3 μm. The use of base metals, such as Cu and Ni, as raw materials for internal conductors (ie, internal electrodes) has also been realized. Recently, further reductions in layer thickness have been achieved and dielectric ceramic layers with thicknesses approaching 1 μm have been developed. [0003] When manufacturing the dielectric material of this kind of monolithic ceramic capacitor, various metal elements are often added to the basic ceramic powder, such as barium titanate powder, the purpose of which is to change the electrical characte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/626C01G23/00C04B35/00C04B35/46C04B35/468H01B3/12H01G4/12
CPCC04B2235/3418C04B2235/5445C01G23/006C04B35/6261C01P2006/40C04B2235/3232C04B2235/3215H01G4/1209C04B35/62805C04B35/4682C04B2235/3208C04B2235/5454C04B35/62886C04B2235/6582C04B2235/6025C04B2235/3213C04B35/638C01P2002/88C04B2235/449C04B2235/6584C04B35/62807C04B2235/3203C04B2235/6588B82Y30/00Y10T428/24917Y10T428/2991Y10T428/2993C04B35/46C04B35/626H01B3/12H01G4/12
Inventor 服部康次冈部参省
Owner MURATA MFG CO LTD
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