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Ceramic dielectric material as well as preparation method and application thereof

A technology of ceramic dielectric and doped materials, which is applied in the direction of fixed capacitor dielectric, fixed capacitor parts, fixed capacitors, etc., can solve the problems of large fluctuations in dielectric constant and limit the application range of barium titanate, and achieve a well-matched Effect

Pending Publication Date: 2022-05-31
SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The dielectric constant of barium titanate fluctuates greatly at -90°C, 0°C and 125°C, which also limits the application range of barium titanate

Method used

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  • Ceramic dielectric material as well as preparation method and application thereof
  • Ceramic dielectric material as well as preparation method and application thereof
  • Ceramic dielectric material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this embodiment, the host material BaTiO 3 The particle size of the powder is 180 nm, and Table 1 is the formula table of each component in Example 1.

[0054] The formula table of table 1 embodiment 1

[0055]

Embodiment 2

[0057] In this embodiment, the host material BaTiO 3 The particle size of the powder is 240 nm, and Table 2 is the formula table of each component in Example 2.

[0058] The formula table of table 2 embodiment 2

[0059]

Embodiment 3

[0061] In this embodiment, the host material BaTiO 3 The particle size of the powder is 240 nm, and Table 3 is the formula table of each component of Example 3.

[0062] The formula table of table 3 embodiment 3

[0063]

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Abstract

The invention provides a ceramic dielectric material as well as a preparation method and application thereof. A main body material of the material is BaTiO3, and doping materials comprise SiO2, CaO, V2O5, ZrO2 and oxides of rare earth elements; the oxides of the rare earth elements comprise at least two of Sc2O3, Sm2O3, Dy2O3 and Ho2O3; the addition amount of the BaTiO3 is 93.5 to 95 mol% in terms of molar percentage; the total addition amount of the doping material is 4.6-7 mol%. BaTiO3 is used as a main body material, a sintering aid, a metal oxide and a rare earth element are used as a composite doping agent, a barium titanate ceramic matrix is modified, the sintering aid and the doping material are added to refine particles, defects are controlled, and the grain size uniformity is improved, so that the high-reliability and high-performance barium titanate ceramic is prepared. The invention relates to a fine-grain ceramic and multilayer ceramic capacitor which has stable capacitance characteristics and is easier to stack.

Description

technical field [0001] The invention relates to a ceramic dielectric material, in particular to a ceramic dielectric material and a preparation method and application thereof. Background technique [0002] Multilayer Ceramic Capacitors (MLCC) use monolithic structure to achieve the effect of increasing the capacity of multiple capacitors in parallel. Because of their low cost, high capacity, and stability, they are widely used in communication equipment, automotive electronics, industrial machines, medical machines, etc. field of communication infrastructure circuits. For example, it can be used as a power supply bypass capacitor, such as liquid crystal modules (liquid crystal driving voltage lines), LSI / IC / OP amplifiers with high power supply voltage, or as smoothing capacitors, such as DC-DC converters (input and output), switching power supplies (Secondary side) etc. In recent years, the miniaturization of mobile electronic devices makes MLCCs gradually develop in the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/12H01G4/30
CPCH01G4/1218H01G4/12H01G4/30
Inventor 张蕾付振晓于淑会曹秀华蒋坤伦王朋飞刘伟峰孙蓉
Owner SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS
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