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High-performance ceramic dielectric material and preparation method thereof

A ceramic dielectric, high-performance technology, applied in the field of high-performance ceramic dielectric materials and their preparation, can solve the problems of dielectric constant, electric strength and temperature characteristics that cannot meet the requirements of use at the same time

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

AI Technical Summary

Problems solved by technology

[0003] The high dielectric constant (>20000) Y5V ceramic capacitor dielectric materials used in ceramic capacitors still have the phenomenon that the dielectric constant, dielectric strength and temperature characteristics cannot meet the requirements of use at the same time

Method used

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  • High-performance ceramic dielectric material and preparation method thereof
  • High-performance ceramic dielectric material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] To prepare ceramic dielectric materials, the steps are as follows:

[0034] A. According to the structural formula BaTiO 3 The stoichiometric ratio of weighing electronic grade BaCO 3 , TiO 2 As raw materials, put the weighed raw materials into a ball mill tank, add an appropriate amount of deionized water and zirconia balls for grinding for 12 hours, and dry and pulverize the discharged materials, calcined at 1250 ° C for 3.5 hours to synthesize BaTiO 3 (abbreviated as BT) sintered block;

[0035] B. According to the structural formula Ba 0.9 Sr 0.1 (Zr 0.5 Sn 0.5 )O 3 The stoichiometric ratio of weighing electronic grade BaCO 3 , SrCO 3丶 ZrO 2 , SnO 2丶 TiO 2 As raw materials, put the weighed raw materials into a ball mill, add an appropriate amount of deionized water and zirconia balls for grinding for 12 hours, and dry and pulverize the discharged materials, calcined at 1300 ° C for 3.5 hours to synthesize Ba 0.9 Sr 0.1 (Zr 0.5 Sn 0.5 )O 3 (abbreviat...

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: Composition of ceramic capacitor dielectric materials

[0041]

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

[0043]

[0044]

[0045] It can be seen from Table 2 that the dielectric constant of the high-performance ceramic dielectric material is adjustable from 15000 to 21000, the dielectric loss is less than or equal to 0.75%, and the electrical strength is greater than or equal to 5KV Ac / mm, the temperature characteristic change rate conforms to the Y5V standard, and is suitable for making Y5V characteristic ceramic capacitors.

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Abstract

The invention relates to a high-performance ceramic dielectric material and a preparation method thereof, the high-performance ceramic dielectric material is composed of a main component and a modified doping agent, and the main component is BaTiO3; the modified doping agent comprises BaxSr1-x (ZrySn1-y) O3, x is equal to 0.2 to 0.9, y is equal to 0.1 to 0.8, and Bi2Zr2O7, and further comprises three or more of the following components: ZnO, Al2O3, WO3, Nb2O5, ZrO2, Li2CO3, Nd2O3, Sm2O3 or MnCO3. The sintering temperature of the high-performance ceramic dielectric material is 1250-1320 DEG C,the dielectric constant is adjustable within 15000-21000, the dielectric loss is less than or equal to 0.75%, the dielectric strength is greater than or equal to 5KVAc / mm, the temperature characteristic change rate is less than + 20-80% (-25-85 DEG C), and the material is suitable for manufacturing Y5V characteristic ceramic dielectric capacitors.

Description

technical field [0001] The invention relates to the preparation technology of ceramic capacitors, in particular to a high-performance ceramic dielectric material and a preparation method thereof. Background technique [0002] Capacitors are a kind of important passive electronic devices, which mainly play the roles of coupling, filtering, resonance, bypassing, compensation, etc. in the circuit, and are indispensable devices in the electronics, communication and information industries. According to the 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 electrical strength, high stability and reliability, and are widely used. Ceramic dielectric materials determine the performance of ceramic capacitors and are the core material of ceramic capacitors. [0003] The high dielectric constant (>20000) Y5V c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622C04B41/88
CPCC04B35/49C04B35/622C04B41/009C04B41/5116C04B41/88C04B2235/3232C04B2235/3215C04B2235/3213C04B2235/3293C04B2235/3298C04B2235/3284C04B2235/3217C04B2235/3258C04B2235/3251C04B2235/3244C04B2235/3203C04B2235/3224C04B2235/3262
Inventor 黄景林钟永全
Owner 厦门三行电子有限公司
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