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High-quality ceramic dielectric material and preparation method thereof

A ceramic dielectric, high-quality technology, applied in the direction of fixed capacitor dielectric, fixed capacitor parts, electrical components, etc.

Inactive Publication Date: 2021-02-26
厦门三行电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • High-quality ceramic dielectric material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of ceramic dielectric materials, the steps are as follows:

[0034] A. According to the structural formula BaTiO 3 The stoichiometric ratio of weighed electronic grade BaCO 3 、TiO 2 As a raw material, put the weighed raw material into a ball mill tank, add an appropriate amount of deionized water and zirconia balls to grind for 12 hours, discharge the material, dry it, grind it, and then calcinate it at 1250°C for 3.5 hours to synthesize BaTiO 3 (abbreviated as BT) burning block;

[0035] B. According to the structural formula Ca 0.8 Sr 0.2 (Zr 0.5 Ti 0.5 )O 3 The stoichiometric ratio of weighed electronic grade CaCO 3 , SrCO 3 、ZrO 2 、TiO 2 As a raw material, put the weighed raw material into a ball mill tank, add an appropriate amount of deionized water and zirconia balls to grind for 12 hours, and then calcine at 1250°C for 2.5 hours to synthesize Ca 0.8 Sr 0.2 (Zr 0.5 Ti 0.5 )O 3 (referred to as CSZT) burning block;

[0036] C. According...

Embodiment 2-12

[0039] The materials were prepared with reference to the methods in the examples, the amounts of each substance are shown in Table 1, and the test results are shown in Table 2.

[0040] Table 1: Ceramic capacitor dielectric material composition table

[0041]

[0042] Table 2: Ceramic capacitor dielectric material performance table

[0043]

[0044] It can be seen from Table 2 that the dielectric constant of the high-quality ceramic dielectric material is adjustable from 7000 to 11000, the dielectric loss is ≦0.5%, and the dielectric strength is ≧7KV Ac / mm, the change rate of temperature characteristics conforms to the Y5U standard, and is suitable for making Y5U characteristic ceramic capacitors.

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Abstract

The invention relates to a high-quality ceramic dielectric material and a preparation method thereof, the high-quality ceramic dielectric material is composed of a main component and a modified dopingagent and the main component is BaTiO3; wherein the modified doping agent comprises Ca<x>Sr<1-x>(Zr<y>Ti<1-y>) O<3>, x is equal to 0.2 to 0.8, y is equal to 0.1 to 0.8, Bi<2> (ZrSn<1-p>) O<7> andp is equal to 0.2 to 0.8, and the modified doping agent further comprises three or more of the following components: MgO, CeO2, ZnO, Al2O3, Nb2O5, La2O3, Nd2O3, Dy2O3 or MnCO3. The firing temperatureof the high-quality ceramic dielectric material is 1250-1320 DEG C, the dielectric constant is adjustable in a range of 7000-11000, the dielectric loss is less than or equal to 0.5%, the dielectric strength is greater than or equal to 7KVAc / mm, the temperature characteristic change rate is less than +20-55% (-25 to 85 DEG C), and the high-quality ceramic dielectric material is suitable for manufacturing Y5U characteristic ceramic dielectric capacitors.

Description

technical field [0001] The invention relates to a ceramic capacitor preparation technology, in particular to a high-quality ceramic dielectric material and a preparation method thereof. Background technique [0002] Capacitors are an important class of passive electronic devices. They mainly play the roles of coupling, filtering, resonance, bypass, and compensation in circuits. They are indispensable devices in the electronics, communication, and information industries. According to the composition material, capacitors can be divided into ceramic capacitors, electrolytic capacitors, film capacitors and so on. Among them, ceramic capacitors have the characteristics of low dielectric loss, high insulation resistance, high dielectric strength, high stability and reliability, and wider application. Ceramic dielectric materials determine the performance of ceramic capacitors and are the core materials of ceramic capacitors. [0003] The high dielectric constant (>10000) Y5U c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622H01G4/12
CPCC04B35/468C04B35/622C04B2235/3232C04B2235/3244C04B2235/3284C04B2235/3298C04B2235/442H01G4/1209
Inventor 黄景林钟永全
Owner 厦门三行电子有限公司
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