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A kind of β-phase eucryptite ceramic powder, preparation method and application thereof

A technology of ceramic powder and eucryptite, which is applied to printed circuits, printed circuit components, printed circuits, etc., can solve the problems of insufficient powder purity and unsatisfactory negative expansion performance, and achieve no pollution in the preparation process and low production cost. Low, high-purity effect

Active Publication Date: 2021-11-30
SUZHOU GINET NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this preparation method can also obtain eucryptite powder with acceptable performance, there are some miscellaneous peaks that are not marked as β-eucryptite phases in its XRD spectrum (such as 2θ being 16 °, 24 °, 67 ° position ), so its eucryptite powder is a non-pure phase eucryptite. The disadvantage is that its powder purity is not enough, which leads to its unsatisfactory negative expansion performance.

Method used

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  • A kind of β-phase eucryptite ceramic powder, preparation method and application thereof
  • A kind of β-phase eucryptite ceramic powder, preparation method and application thereof
  • A kind of β-phase eucryptite ceramic powder, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Step 1: Put lithium hydroxide, silicon dioxide, and aluminum hydroxide into the stirring device according to the mass ratio of 1:1:1 to obtain mixed powder;

[0071] Step 2: Mix according to the ratio of pure water to mixed powder mass ratio of 2:3, and then stir at a high speed of 180-220rpm for 4 hours to obtain a uniformly mixed slurry;

[0072] Step 3: Dry the slurry in an oven at 100°C for 2 hours to obtain a dry powder;

[0073] Step 4: put the dry powder and zirconia ball milling medium into the grinding device according to the mass ratio of 1:3, and dry mix and grind for 1 hour to obtain the precursor powder;

[0074] Step 5: Calcining the precursor powder at a high temperature of 800°C for 3 hours to obtain β-phase eucryptite powder with a purity of 74.6%;

[0075] Step 6: further grinding and refining the powder obtained in step 5 to obtain a fine powder with D50=2 μm and D100<15 μm;

[0076] Step 7: Put the fine powder, pure water, polyvinyl alcohol binder,...

Embodiment 2

[0082] Step 1: Put lithium hydroxide, silicon dioxide, and aluminum hydroxide into the stirring device according to the mass ratio of 1:1:1 to obtain mixed powder;

[0083] Step 2: Mix according to the ratio of pure water to mixed powder mass ratio of 2:3, and then stir at a high speed of 180-220rpm for 4 hours to obtain a uniformly mixed slurry;

[0084] Step 3: Dry the slurry in an oven at 100°C for 2 hours to obtain a dry powder;

[0085] Step 4: put the dry powder and zirconia ball milling medium into the grinding device according to the mass ratio of 1:3, and dry mix and grind for 1 hour to obtain the precursor powder;

[0086] Step 5: Calcining the precursor powder at a high temperature of 1000°C for 3 hours to obtain β-phase eucryptite powder with a purity of 100%;

[0087] Step 6: further grinding and refining the powder obtained in step 5 to obtain a fine powder with D50=2 μm and D100<15 μm;

[0088] Step 7: Put the fine powder, pure water, polyvinyl alcohol binder,...

Embodiment 3

[0094] Step 1: Put lithium hydroxide, silicon dioxide, and aluminum hydroxide into the stirring device according to the mass ratio of 1:1:1 to obtain mixed powder;

[0095] Step 2: Mix according to the ratio of pure water to mixed powder mass ratio of 2:3, and then stir at a high speed of 180-220rpm for 4 hours to obtain a uniformly mixed slurry;

[0096] Step 3: Dry the slurry in an oven at 100°C for 2 hours to obtain a dry powder;

[0097] Step 4: put the dry powder and zirconia ball milling medium into the grinding device according to the mass ratio of 1:3, and dry mix and grind for 1 hour to obtain the precursor powder;

[0098] Step 5: Calcining the precursor powder at a high temperature of 1200°C for 3 hours to obtain β-phase eucryptite powder with a purity of 100%;

[0099] Step 6: further grinding and refining the powder obtained in step 5 to obtain a fine powder with D50=2 μm and D100<15 μm;

[0100] Step 7: Put the fine powder, pure water, polyvinyl alcohol binder,...

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Abstract

The invention provides a β-phase eucryptite ceramic powder, a preparation method and its application, wherein the β-phase eucryptite ceramic powder uses lithium source, silicon dioxide, and aluminum hydroxide as raw materials, which are first calcined and then ground into β-phase eucryptite powder, and then sintering and grinding the β-phase eucryptite powder into the β-phase eucryptite ceramic powder. The β-phase eucryptite ceramic powder of the present invention has a higher negative expansion coefficient, and at the same time, the β-phase eucryptite ceramic powder has high purity, and the content of the β-phase eucryptite ceramic powder can reach more than 99.5%.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a β-phase eucryptite ceramic powder with a high negative expansion coefficient and a method for preparing the copper-clad laminate made therefrom. Background technique [0002] With the development of 5G communication technology, the use of ceramic devices in electronic equipment is gradually increasing. However, the thermal expansion coefficient of commonly used copper clad laminates is about 50% higher than that of ceramic devices. The thermal expansion coefficients of the two do not match, and thermal stress is likely to cause device failure during actual use. Therefore, it is necessary to develop a CCL filler material with a high negative expansion coefficient to reduce the thermal expansion coefficient of the CCL. Eucryptite has a high negative expansion coefficient, high insulation and excellent alkali resistance, and is suitable as a filler to red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/19H05K1/03C04B35/626C04B35/634
CPCC04B35/19H05K1/0306C04B35/6261C04B35/63416C04B35/62695C04B35/62645C04B35/62655H05K2201/0209
Inventor 王德彬文明沈晓燕
Owner SUZHOU GINET NEW MATERIAL TECH CO LTD
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