Medium and low-dielectric constant low-temperature cofired ceramic material and preparation method thereof

A technology of low temperature co-fired ceramics and low dielectric constant is applied in the field of ceramic materials to achieve the effects of stable performance, low cost and no toxic and side effects

Active Publication Date: 2011-08-31
SHENZHEN SUNLORD ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem of the medium and low dielectric constant low temperature co-fired ceramic material of the present invention is solved by the following technical solutions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0066] Weigh each component according to the weight ratio of the following table to prepare the ceramic material main phase mixture:

[0067] ZnO

TiO 2

BaO

ZrO 2

La 2 o 3

SM 2 o 3

al 2 o 3

21.19％

11.33％

2.97％

4.65％

6.49％

3.91％

2.06％

[0068] Where BaO uses the same amount of BaCO 3 , accounting for 3.82% by weight of the mixture.

[0069] Put the above ceramic material mixture in a ball mill jar, add deionized water about 1.5 times the weight of the ceramic material mixture, dry it in an oven after ball milling for 15 hours, grind and sieve to obtain a ground mixed powder of the main phase of the ceramic material Calcinate the ground mixed powder of the primary ceramic material phase at 1300°C for 1.5 hours, grind to obtain the calcined material for the primary ceramic phase, and weigh the components according to the weight ratio in the table below to obtain the second ceramic materi...

specific Embodiment approach 2

[0074] Weigh each component according to the weight ratio of the following table to prepare the ceramic material main phase mixture:

[0075] ZnO

TiO 2

BaO

ZrO 2

La 2 o 3

SM 2 o 3

Al 2 o 3

21.32％

13.36％

6.84％

6.47％

5.25％

6.68％

2.69％

[0076] Where BaO uses the same amount of BaCO 3 , accounting for 8.80% by weight of the mixture.

[0077] Put the above ceramic material mixture in a ball mill jar, add deionized water about 1.75 times the weight of the ceramic material mixture, dry it in an oven after ball milling for 18 hours, grind and sieve to obtain a ground mixed powder of the main phase of the ceramic material Calcinate the ground and mixed powder of the main phase of the ceramic material at 1300°C for 2 hours, grind and obtain the calcined material of the main phase of ceramics, and weigh the components according to the weight ratio in the table below to obtain the second cerami...

specific Embodiment approach 3

[0082] Weigh each component according to the weight ratio of the following table to prepare the ceramic material main phase mixture:

[0083] ZnO

TiO 2

BaO

ZrO 2

La 2 o 3

SM 2 o 3

al 2 o 3

22.35％

21.04％

7.02％

8.54％

1.97％

1.33％

3.69％

[0084] Where BaO uses the same amount of BaCO 3 , accounting for 9.03% by weight of the mixture.

[0085] Put the above ceramic material mixture in a ball mill jar, add deionized water about twice the weight of the ceramic material mixture, dry it in an oven after ball milling for 24 hours, grind and sieve to obtain a ground mixed powder of the main phase of the ceramic material Calcinate the ground and mixed powder of the main phase of the ceramic material at 1300°C for 2.5 hours, grind to obtain the calcined material of the main phase of the ceramic, and weigh the components according to the weight ratio in the table below to obtain the second ceramic...

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Abstract

The invention provides a medium and low-dielectric constant low-temperature cofired ceramic material. A ceramic principal phase comprises 20%-40% of ZnO, 10%-27% of TiO2, 1%-15% of BaO, 1%-10% of ZrO2, 1%-8% of La2O3 and the balance of Sm2O3; and a fluxing agent comprises 10%-25% of SiO2, 1%-10% of B2O3 and 3%-15% of aluminoborosilicate glass powder. A preparation method of the material comprises the steps of: 1) preparing a ceramic material principal phase mixture ; 2) firstly grinding; 3) roasting; 4) preparing a mixture of the fluxing agent and the ceramic principal phase roasting material; 5) re-roasting; and 6) regrinding. The sintering temperature is as low as 830-900 DEG C, and the sintering contractibility rate can be controlled at 10%-20%; the adjusting range of dielectric constant is 5-25, and a dielectric constant attrition rate is less than 0.001; the temperature coefficient of resonance frequency is -10-10ppm; and the material can be compositely and jointly sintered with a ferrite powder magnetic film and silver entoplasm.

Description

technical field [0001] The invention relates to a ceramic material, in particular to a medium-low dielectric constant low-temperature co-fired ceramic material and a preparation method thereof. Background technique [0002] The electrical properties and process characteristics of existing low-temperature cofired ceramics (Low-temperature cofired ceramics, abbreviated as LTCC) materials need to be further improved, and the following problems generally exist: 1) The sintering temperature is too high to achieve Low-temperature sintering below 900°C; 2) The frequency temperature coefficient is large or the quality factor is low, which cannot meet the requirements of high-frequency components; 3) The co-firing performance with silver electrodes is not stable enough, and the co-firing performance is poor; 4) Casting slurry preparation Difficulties, the electromagnetic properties of tape-cast raw ceramic tapes decrease after co-firing, etc. Contents of the invention [0003] A t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/46C04B35/622
Inventor 庞新锋包承育石吉伟漆珂伍隽
Owner SHENZHEN SUNLORD ELECTRONICS
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