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Microwave dielectric ceramic material with medium-high dielectric constant and preparation method thereof

A technology of microwave dielectric ceramics and high dielectric constant, applied in the field of dielectric ceramic materials, can solve problems such as inability to co-fire silver, high sintering temperature, and difficult production and processing, and achieve stable performance, simple preparation process, and low cost.

Inactive Publication Date: 2016-05-04
SHENZHEN SUNLORD ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing microwave dielectric ceramic materials generally have the following problems: 1. The sintering temperature is too high (greater than 900 degrees), and cannot be co-fired with silver
2. The dielectric constant is unstable, making it difficult to achieve mass production of miniaturized devices
3. It cannot be applied to the casting process, resulting in difficulties in production and processing

Method used

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  • Microwave dielectric ceramic material with medium-high dielectric constant and preparation method thereof
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Examples

Experimental program
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Effect test

example 1

[0073] Take each component according to the percentage by weight shown in example 1 in Table 1, and the preparation method follows the steps below:

[0074] 1) Preparation of ceramic main phase material mixture

[0075] The component Li of the ceramic main phase material 2 O, MgO, TiO 2 , ZrO 2 , La 2 o 3 Placed in a ball mill jar, mixed according to the weight percentage shown in Example 1 in Table 1, to obtain a ceramic main phase material mixture;

[0076] 2) Grinding ceramic main phase material for the first time

[0077] Add deionized water about 1.55 times the weight of the ceramic main phase material mixture to the ceramic main phase material mixture prepared in step 1), dry it in an oven after 300 rpm planetary ball milling for 15 hours, and pass through 200 meshes after regrinding Sieve the mixed powder of ceramic main phase material;

[0078] 3) Calcined ceramic main phase material grinding mixed powder

[0079] calcining the ground mixed powder of the main c...

example 2

[0089] Take each component according to the percentage by weight shown in example 2 in table 1, and preparation method is according to the following steps:

[0090] 1) Preparation of ceramic main phase material mixture

[0091] The component Li of the ceramic main phase material 2 O, MgO, TiO 2 , ZrO 2 , La 2 o 3 Placed in a ball mill jar, mixed according to the weight percentage shown in Example 2 in Table 1, to obtain a ceramic main phase material mixture;

[0092] 2) Grinding ceramic main phase material for the first time

[0093] Add deionized water about 1.5 times the weight of the ceramic main phase material mixture to the ceramic main phase material mixture prepared in step 1), dry it in an oven after 300 rpm planetary ball milling for 18 hours, and pass through 200 meshes after regrinding Sieve to obtain the ground mixed powder of ceramic main phase material;

[0094] 3) Calcined ceramic main phase material grinding mixed powder

[0095] calcining the ground mi...

example 3

[0105] Take each component according to weight percent shown in example 3 in table one, and preparation method is according to the following steps:

[0106] 1) Preparation of ceramic main phase material mixture

[0107] The component Li of the ceramic main phase material 2 O, MgO, TiO 2 , ZrO 2 , La 2 o 3 Placed in a ball mill jar, mixed according to the weight percentage shown in Example 3 in Table 1, to obtain a ceramic main phase material mixture;

[0108] 2) Grinding ceramic main phase material for the first time

[0109] Add deionized water about 1.65 times the weight of the ceramic main phase material mixture to the ceramic main phase material mixture prepared in step 1), dry it in an oven after 300 rpm planetary ball milling for 22 hours, and pass through 200 meshes after regrinding Sieve to obtain the ground mixed powder of ceramic main phase material;

[0110] 3) Calcined ceramic main phase material grinding mixed powder

[0111] calcining the ground mixed pow...

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Abstract

The invention discloses a microwave dielectric ceramic material with medium-high dielectric constant; the microwave dielectric ceramic material includes a ceramic main phase material and a fluxing material; the ceramic main phase material includes the following components by the weight percentage: 15%-25% of Li2O, 10%-25% of MgO, 20-70% of TiO2, 1-5% of ZrO2, and the balance La2O3; the fluxing material includes the following components by the weight percentage: 5-10% of BaO, 5-10% of CuO, and 1-5% of B2O3. The preparation method of the ceramic material comprises the processes of preparing a ground and mixed powder of the ceramic main phase material and the fluxing material and calcining and grinding to obtain the ceramic material. The microwave dielectric ceramic material with medium-high dielectric constant has the advantages of low sintering temperature, stable performance and simple preparation process.

Description

technical field [0001] The invention relates to a dielectric ceramic material, in particular to a medium-high dielectric constant microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] The existing microwave dielectric ceramic materials generally have the following problems: 1. The sintering temperature is too high (greater than 900 degrees), and cannot be co-fired with silver. 2. The dielectric constant is unstable, making it difficult to realize mass production of miniaturized devices. 3. It cannot be applied to the casting process, resulting in difficulties in production and processing. Above-mentioned defect needs to be improved. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a medium-high dielectric constant microwave dielectric ceramic material and a preparation method thereof. [0004] To achieve the above object, the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/46C04B35/626C04B35/63
CPCC04B35/46C04B35/62645C04B35/6303C04B2235/3203C04B2235/3206C04B2235/3227C04B2235/3244C04B2235/5436C04B2235/5445C04B2235/6583C04B2235/9607
Inventor 苏柯铭庞新锋伍隽李志龙武明阳
Owner SHENZHEN SUNLORD ELECTRONICS