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A high-power-resistant lead-free environmentally friendly ceramic dielectric material

A ceramic dielectric and power type technology, applied in the direction of fixed capacitor dielectric, fixed capacitor components, etc., can solve problems such as thermal breakdown failure, and achieve the effects of small dielectric loss, good frequency characteristics, and high dielectric constant

Active Publication Date: 2015-11-18
鞍山信材科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the domestic power industry, the application of high-voltage transmission, distribution line transmission and communication, load closer, circuit breaker, electroscope, etc., as well as the power supply of medical equipment such as X-ray machines and various lasers and pulse circuits. It is still blank and can only rely on imports
The main reason is that the frequency-dielectric loss characteristics of the ceramic capacitor powder commonly used at present cannot meet the above requirements, and thermal breakdown failure is prone to occur during use.

Method used

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  • A high-power-resistant lead-free environmentally friendly ceramic dielectric material
  • A high-power-resistant lead-free environmentally friendly ceramic dielectric material
  • A high-power-resistant lead-free environmentally friendly ceramic dielectric material

Examples

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preparation example Construction

[0017] The preparation method of above-mentioned ceramic dielectric material:

[0018] Main ingredient BaTiO 3 Preparation: The raw material BaCO with a purity of more than 99.0% 3 and TiO 2 According to the molar ratio of 1: (1-1.05), the ball mill is mixed evenly, and calcined at 1200-1300°C for 2-4 hours.

[0019] Sub-material SrTiO 3 Preparation: The raw material SrCO with a purity of more than 99.0% 3 and TiO 2 After mixing uniformly by ball milling at a molar ratio of 1:1, calcining at 1150-1250°C for 2-4 hours.

[0020] Preparation of ceramic dielectric materials: The main material, auxiliary material, modified additives and sintering flux are mixed in molar ratios, mixed and ground by a sand mill to make the overall particle size below 5 μm, and 3% polyvinyl alcohol solution is added to it. Evenly, granulate to form a dry pressing molding powder with uniform particle size and good distribution.

[0021] Embodiment 1~No. 5 material formula is shown in Table 1

...

Embodiment 1

[0025] Main ingredient BaTiO 3 Preparation: The raw material BaCO with a purity of more than 99.0% 3 , with 0.99 mol BaCO 3 and 1.0 mol TiO 2 Proportion, ball milling and mixing evenly, pre-calcine the mixture at 1220°C for 3 hours, and then make the average particle size below 100 μm through ultra-fine grinding, that is, the main crystal phase is Ba 0.99 TiO 3 Material.

[0026] Sub-material SrTiO 3 Preparation: The raw materials with a purity of more than 99.0% were mixed with 1.0 mole of SrCO 3 and 1.0 mol TiO 2 Proportion, ball milling and mixing evenly, pre-calcine the mixture at 1180°C for 3.5 hours, and then make the average particle size below 100 μm through ultra-fine grinding, that is, the main crystal phase is SrTiO 3 Material.

[0027] Ceramic dielectric material preparation: 0.57 moles of the main material BaTiO 3 , 0.31 mol of sub-material SrTiO 3 , 0.05 mol 1Bi 2 o 3 , 0.053 mol TiO 2 , 0.001 mol MnCO 3 , 0.0005 mol Nd 2 o 3 , 0.0004 mol Nb 2 o ...

Embodiment 2

[0029] Main ingredient BaTiO 3 Preparation: The raw material BaCO with a purity of more than 99.0% 3 , with 0.99 mol BaCO 3 and 1.0 mol TiO 2 The proportion of ball milling is uniform, and the mixture is pre-calcined at 1250 ° C for 2.5 hours, and then the average particle size is below 100 μm through ultra-fine grinding, that is, the main crystal phase is Ba 0.99 TiO 3 Material.

[0030] Sub-material SrTiO 3Preparation: The raw materials with a purity of more than 99.0% were mixed with 1.0 mole of SrCO 3 and 1.0 mol TiO 2 Proportion, ball milling and mixing evenly, pre-calcine the mixture at 1220°C for 3 hours, and then make the average particle size below 100 μm through ultra-fine grinding, that is, the main crystal phase is SrTiO 3 Material.

[0031] Ceramic dielectric material preparation: 0.57 moles of the main material BaTiO 3 , 0.31 mol of sub-material SrTiO 3 , 0.05 mol 2Bi 2 o 3 , 0.053 mol TiO 2 , 0.001 mol MnCO 3 , 0.0006 mol Nd 2 o 3 , 0.0006 mol Nb...

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Abstract

The invention relates to a high-power-resistant type lead-free environment-friendly ceramic dielectric material which comprises a primary crystalline phase, an indirect material, a modified additive and a sintered fluxing agent, wherein a structural formula of the primary crystalline phase is BaTiO3; the indirect material is SrTiO3; the modified additive refers to one or more of MnCO3, TiO2, CaCO3, ZrO2, Nd2O3 and Nb2O5; the sintered fluxing agent refers to one or more of Bi2O3, ZnO, MgO and SiO2; and the ceramic dielectric material comprises the following components in parts by mole: 50-65mol% of primary crystalline phase, 30-45mol% of indirect material, 2-10mol% of modified additive and 2.5-20mol% of sintered fluxing agent. The ceramic dielectric material accords with the N4700 characteristic, has the advantages of high dielectric constant, good frequency-dielectric loss characteristics, high electric strength, uniform particle size distribution and good forming process and accords with the environment-friendly requirement.

Description

technical field [0001] The present invention relates to a ceramic dielectric material, in particular to a ceramic material conforming to N4700 characteristics, and the material has good frequency resistance, as the frequency of use increases, its dielectric loss increases less and its electric strength is high. Background technique [0002] In the field of material application, electronic ceramic materials have been widely used in multilayer chip ceramic capacitors (MLCC), resistors, inductors, microwaves, integrated circuit substrates, optoelectronic devices, LC, RC, L-C-R composite components, sensors, etc. in electronic components. However, in the domestic power industry, the application of high-voltage transmission, distribution line transmission and communication, load closer, circuit breaker, electroscope, etc., as well as the power supply of medical equipment such as X-ray machines and various lasers and pulse circuits. It is still blank and can only rely on imports....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/12C04B35/468C04B35/64
Inventor 于金龙范垂旭史宝林
Owner 鞍山信材科技有限公司