Multilayer clip ceramic capacitor dielectric material and capacitor thereof

A multi-layer chip ceramic and capacitor dielectric technology, which is applied in the direction of fixed capacitor dielectric, laminated capacitor, fixed capacitor parts, etc., can solve the problem of high cost of silver-palladium inner electrode, and achieve good high-frequency high-Q electrical performance Effect

Inactive Publication Date: 2011-11-23
GUANGDONG FULLDE ELECTRONICS
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AI Technical Summary

Problems solved by technology

[0004] Existing high-frequency MLCC usually has two kinds of silver-palladium inner electrode and nickel electrode, but the cost of silver-palladium inner electrode is high, and the nickel electrode can only meet the frequency requirements below 300MHz

Method used

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  • Multilayer clip ceramic capacitor dielectric material and capacitor thereof

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Embodiment

[0022] A high-frequency dielectric ceramic material matched with copper electrodes, the raw materials with a purity of more than 99.5% are selected, with (Ca 0.75 Sr 0.25 ) 1.005 (Ti 0.05 Zr 0.95 )O 3 Proportioning method, choose 1.0 mole of CaCO 3 , 0.25 moles of SrCO 3 , 0.0663 moles of TiO 2 , 1.2603 moles of ZrO 2 The mixing ratio is uniformly dispersed and mixed by sand milling, and calcined at 1250°C for 2.5 hours to obtain (Ca 0.75 Sr 0.25 ) 1.005 (Ti 0.05 Zr 0.95 )O 3 main crystalline material.

[0023] Described glass additive is Li 2 O.B 2 o 3 、Al 2 o 3 , ZnO, SiO2 After measuring the weight of the powder in mol%, the required particle size was obtained by sand milling. especially B 2 o 3 Since it is in the form of glass with a size of 2mm, it is difficult to crush. Then after drying and mixing, put it into a platinum crucible and keep the temperature at 1200-1350°C for 2 hours, then put the melted liquid into cold water for rapid cooling. It i...

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Abstract

The invention discloses a multilayer clip ceramic capacitor dielectric material and a capacitor thereof. The multilayer clip ceramic capacitor dielectric material consists of a main crystalline phase, a modified aid and a glass aid, wherein the main crystalline phase is (CaxSr(1-x))m(TiyZr(1-y))O3, x is more than or equal to 0.6 and is less than or equal to 0.8, y is more than or equal to 0.01 and is less than or equal to 0.1, and m is more than or equal to 1.000 and is less than or equal to 1.008; the modified aid is one or two of Bi2O3 and MnCO3; and the glass aid is one or more of Li2O, B2O3, Al2O3, ZnO and SiO2. When the multilayer clip ceramic capacitor is made of the material, the material can be matched with a copper electrode, so the material has the high-frequency and high Q electrical performance.

Description

technical field [0001] The invention relates to a dielectric material of a multilayer ceramic capacitor matched with copper internal electrodes and a method for preparing the capacitor. Background technique [0002] With the rapid development of electronic technology, especially the development of the whole machine industry, such as the continuous emergence of new electronic products represented by mobile phones, communications, flat panel displays, automotive electronics, power lighting, etc., it has brought good development to the development of capacitors. opportunity. Multilayer chip ceramic capacitors, referred to as MLCC, cater to the needs of surface mount technology (SMD) and maintain a higher development speed. [0003] Multilayer chip ceramic capacitors continue to develop in the direction of miniaturization, large capacity, high voltage, high temperature, and high frequency. In terms of high frequency, the communication industry continues to develop towards 3G, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622H01G4/30H01G4/12
Inventor 陈勇刚李稳根
Owner GUANGDONG FULLDE ELECTRONICS
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