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Ceramic dielectric material and monolithic capacitor

A technology of dielectric materials and ceramic dielectrics, applied in capacitors, fixed capacitors, fixed capacitor dielectrics, etc., can solve problems such as the inability to stably achieve large capacity, achieve excellent dielectric properties and reliability, small and uniform and dense grains, The effect of excellent dielectric constant temperature coefficient

Pending Publication Date: 2021-07-30
SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the ceramic material in the prior art cannot stably realize a large capacity in the process of being used as an MLCC medium, the present invention provides a stable and reliable ceramic dielectric material that can be used in MLCC

Method used

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  • Ceramic dielectric material and monolithic capacitor
  • Ceramic dielectric material and monolithic capacitor
  • Ceramic dielectric material and monolithic capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～28

[0027] This embodiment relates to a ceramic dielectric material, said dielectric material with (Ba 0.13 Ca 0.61 Sr 0.26 )(Zr 0.97 Ti 0.03 )O 3 As the main crystal phase, add the required modification additives and sintering aids according to the ratio in Table 1;

[0028] Table 1: Formulation composition of main crystal phase, modifying additives and sintering aids

[0029]

[0030]

[0031] The mixtures in Examples 1-28 were wet-mixed and dispersed, dried and sieved to obtain medium material powder.

[0032] The main crystal phase material in the above examples is prepared by the following method: select BaCO with a purity of 99.5% or more 3 , CaCO 3 , SrCO 3 , ZrO 2 、TiO 2 Raw materials, according to (Ba 0.13 Ca 0.61 Sr 0.26 )(Zr 0.97 Ti 0.03 )O 3 The method of composition is weighed, and then the weighed raw materials are wet-mixed and dispersed, dried, and then the dried mixture is calcined at 1050°C to obtain the main crystal phase raw material, and ...

Embodiment 29

[0034] This embodiment relates to a kind of ceramic dielectric material, and its main crystal phase is (Ba 0.1 Ca 0.6 Sr 0.3 )(Zr 0.95 Ti 0.05 )O 3 , its formula is 100mol as the main crystal phase, MnCO 3 3.5mol, MgTiO 3 0.4mol, CaTiO 3 2.5mol, Y 2 o 3 0.7mol, Nb 2 o 5 0.04mol, Al 2 o 3 0.8mol, H 3 BO 3 0.65mol, SiO 2 4mol.

Embodiment 30

[0036] This embodiment relates to a kind of ceramic dielectric material, and its main crystal phase is (Ba 0.15 Ca 0.65 Sr 0.2 )(Zr 0.98 Ti 0.02 )O 3 , its formula is 100mol as the main crystal phase, MnCO 3 3mol, MgTiO 3 0.3mol, CaTiO 3 2mol, Y 2 o 3 0.6mol, V 2 o 5 0.03mol, Al 2 o 3 0.4mol, H 3 BO 3 0.6mol, SiO 2 5mol.

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Abstract

The invention belongs to the technical field of ceramic materials, and particularly relates to a ceramic dielectric material which comprises the following functional components: a principal crystalline phase, a modified additive and a sintering aid, wherein the principal crystalline phase is (BaxCaySrz)m(Zr[alpha]Ti[beta])O3, wherein x is greater than 0.01 and less than 0.2, y is greater than 0.4 and less than 0.8, z is greater than 0.1 and less than 0.4, m is greater than 0.95 and less than 1.01, alpha is greater than 0.7 and less than 1.0, and beta is greater than 0 and less than 0.1. The dielectric material disclosed by the invention meets COG characteristics of EIA standards, and is uniform in material particles, uniform in particle size distribution, simple in preparation process and excellent in dielectric property; and the dielectric material is used for manufacturing an MLCC, is matched with a nickel inner electrode, is small, uniform and compact in sintering grain, and is suitable for manufacturing thin-medium, large-capacity and high-reliability MLCC products.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a ceramic dielectric material. Background technique [0002] MLCC is currently one of the chip components with the largest output and fastest development. MLCC is composed of three parts: internal electrode, ceramic layer and terminal electrode. The dielectric material of the ceramic layer and the internal electrode are stacked in a dislocation manner, and then fired at high temperature. Forming, and then sealing the metal layer at both ends of the chip, a monolithic structure is obtained, so MLCC is also often called a "monolithic capacitor". [0003] In recent years, with the expansion of the functions of electronic complete machine products, the requirements for electronic components; even if the thin medium and large capacity must ensure the reliability of MLCC; in order to achieve large capacity, on the one hand, the dielectric material has a high diele...

Claims

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Application Information

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IPC IPC(8): C04B35/49H01G4/12C04B35/64
CPCC04B35/49H01G4/1209C04B35/64C04B2235/442C04B2235/3224C04B2235/3225C04B2235/3258C04B2235/3256C04B2235/3239C04B2235/3251C04B2235/3217C04B2235/3418C04B2235/3409C04B2235/5445C04B2235/96
Inventor 陈世纯杨爱民张巧云张莹郑禹宋锡滨
Owner SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD