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Super low temperature sintered ceramic medium materials, manufacturing method thereof and capacitor made therefrom

A technology of ceramic capacitors and ceramic dielectrics, applied in the direction of laminated capacitors, fixed capacitor dielectrics, fixed capacitor parts, etc., can solve problems such as environmental pollution, unfavorable development and needs, and achieve reduced production costs, excellent thermal stability, Effect of low temperature coefficient of dielectric constant

Inactive Publication Date: 2005-07-06
广东风华高新科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Medium-high temperature sintered high-frequency thermally stable ceramic dielectric material, the glass contains harmful elements such as lead (Pb), arsenic (As), cadmium (Cd), which pollutes the environment and is not conducive to the development and needs of modern society

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Raw materials with a purity of 99.5 or more were mixed with 1 mole of BaCO 3 , 1.0025 moles of Nd 2 o 3 , 5.0 moles of TiO 2 Ratio, ball milling and mixing evenly, pre-calcine the mixture at 1100°C for 2.5 hours to obtain BaNd 2+X Ti 5 o 14+1.5X (X=0.005) Main briquette material.

[0033] Mix raw materials with a purity of 99.5 or more in a predetermined ratio with H 3 BO 3 、Al 2 o 3 , SiO 2 , CaCO 3 Raw materials, ball-milled uniformly, and then melted at 1150°C, thus obtaining uniform auxiliary component B 2 o 3 、Al 2 o 3 , SiO 2 , CaO glass powder.

[0034] Then, add auxiliary components to the main component according to a predetermined ratio, as shown in Table 1, make ceramic materials according to the material production process, and then add organic binders and ethanol and other solvents according to the production process of chip MLCC to form a slurry , cast the slurry into a membrane with a thickness of 20 microns, print full silver (Ag) or sil...

Embodiment 2

[0040] Raw materials with a purity of 99.5 or more were mixed with 1 mole of BaCO 3 , 1.01 mol Nd 2 o 3 , 5.0 moles of TiO 2 Ratio, ball milling and mixing evenly, pre-calcine the mixture at 1150°C for 2.5 hours to obtain BaNd 2+X Ti 5 o 14+1.5X (X=0.02) Main component material.

[0041] Mix raw materials with a purity of 99.5 or more in a predetermined ratio with H 3 BO 3 、Al 2 o 3 , SiO 2 , CaCO 3 Raw materials, ball-milled uniformly, and then melted at 1200°C, thus obtaining uniform auxiliary component B 2 o 3 、Al 2 o 3 , SiO 2 , CaO glass powder.

[0042] Then add auxiliary components in the main component according to a predetermined ratio, as shown in Table 3, and manufacture and test the multilayer chip ceramic capacitor according to the method of Example 1. The test results are shown in Table 4.

[0043]

[0044] invention material

[0045] It can be seen from Table 4 that the multilayer chip ceramic capacitor according to the prese...

Embodiment 3

[0047] Raw materials with a purity of 99.5 or more were mixed with 1 mole of BaCO 3 , 1.05 mol Nd 2 o 3 , 5.0 mol TiO 2 Ratio, ball milling and mixing evenly, pre-calcine the mixture at 1150°C for 2.5 hours to obtain BaNd 2+X Ti 5 o 14+1.5X (X=0.1) Main component material.

[0048] Mix raw materials with a purity of 99.5 or more in a predetermined ratio with H 3 BO 3 、Al 2 o 3 , SiO 2 , CaCO 3 Raw materials, ball-milled uniformly, and then melted at 1250°C, thus obtaining uniform auxiliary component B 2 o 3 、Al 2 o 3 , SiO 2 , CaO glass powder.

[0049] Then add auxiliary components in the main component according to a predetermined ratio, as shown in Table 5, and manufacture and test the multilayer chip ceramic capacitor according to the method of Example 1. The test results are shown in Table 6.

[0050]

[0051] material name

[0052] It can be seen from Table 6 that the multilayer chip ceramic capacitor according to the present inventio...

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Abstract

The present invention discloses a super low temperature sintered ceramic medium material, manufacturing method thereof and multi-layer sheet type ceramic capacitor made therefrom. The ceramic medium material of the invention is a lead-free environment protective material, comprising major component of BaNd2+XTi5O14+1.5X, wherein the value of X is between 0.001 and 0.2, and secondary component of B2O3, Al2O3, SiO2, CaO and ZnO, furthermore, it can also comprises SnO and one or more compounds selected from K2O, ZrO2, Fe2O3 and MgO. The chip of the ceramic capacitor can be sintered under lower temperature of 860 to 900 degrees centigrade, and can match with complete-Ag or low Pd contained Ag-Pd alloy interior electrode, thereby greatly reducing the production cost of MLCC. The dielectric constant of the ceramic capacitor is between 15 and 25, the dielectric property complies with EIA standard and meets COG characteristics.

Description

technical field [0001] The invention relates to a high-frequency thermally stable ceramic dielectric material sintered at ultra-low temperature, its preparation method and a chip multilayer ceramic capacitor, more specifically, the invention relates to a lead (Pb), arsenic (As ), cadmium (Cd) and other harmful elements such as environmentally friendly ultra-low temperature sintered high-frequency thermally stable ceramic dielectric material, its preparation method and the fabricated chip multilayer ceramic capacitor. Background technique [0002] Palladium (Pd) or silver (Ag)-palladium (Pd) alloy with high palladium (Pd) content has been used as the internal electrode matching co-firing for medium-high temperature sintered high-frequency multilayer ceramic capacitor (MLCC) ceramics, which cannot be matched with All silver (Ag) internal electrodes are matched and co-fired, and the high sintering temperature is the main contradiction. In recent years, due to the fierce competi...

Claims

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Application Information

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IPC IPC(8): C04B35/462C04B35/64H01G4/12H01G4/30
Inventor 魏汉光王作华郭精华付振晓李文君周志珍
Owner 广东风华高新科技集团有限公司
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