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Ultralow-expansion-coefficient eucryptite and preparation method thereof

A technology of expansion coefficient and eucryptite, applied in aluminum silicate, silicate and other directions, can solve the problems of many by-products, high reaction temperature, large energy consumption, etc., and achieve the effect of low thermal expansion coefficient and reduction of thermal expansion coefficient.

Active Publication Date: 2021-01-22
淄博辰东新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the grinding process is carried out in a purely closed space, there is no dust and organic solution in the whole process. It is a simple and green preparation method, and the preparation process is simple and the cycle is short. It can be prepared in batches, but , the β-eucryptite prepared by the solid state reaction method has poor chemical uniformity, many by-products, high reaction temperature and large energy consumption

Method used

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  • Ultralow-expansion-coefficient eucryptite and preparation method thereof
  • Ultralow-expansion-coefficient eucryptite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of preparation method of ultra-low expansion coefficient eucryptite, concrete steps are as follows:

[0035] (1) Using polystyrene as a template, tetraethyl orthosilicate is hydrolyzed to obtain hollow silica;

[0036] (2) Aluminum oxide and lithium oxide are then placed in polydiallyl dimethyl ammonium chloride solution for immersion treatment to obtain positively charged aluminum oxide and lithium oxide, and hollow silicon dioxide is placed in catalase Immersion treatment in the solution to obtain negatively charged hollow silica;

[0037] (3) Evenly mix positively charged alumina and lithium oxide, negatively charged hollow silica and pretreated β-eucryptite, and sinter to obtain the described ultra-low expansion coefficient eucryptite stone.

[0038] The molar ratio of hollow silica, alumina and lithium oxide is 1:1:1.

[0039] The concrete method of step (1) is:

[0040] (1-1) take styrene as raw material earlier, polystyrene microspheres are obtained th...

Embodiment 2

[0052] A kind of preparation method of ultra-low expansion coefficient eucryptite, concrete steps are as follows:

[0053] (1) Using polystyrene as a template, tetraethyl orthosilicate is hydrolyzed to obtain hollow silica;

[0054] (2) Aluminum oxide and lithium oxide are then placed in polydiallyl dimethyl ammonium chloride solution for immersion treatment to obtain positively charged aluminum oxide and lithium oxide, and hollow silicon dioxide is placed in catalase Immersion treatment in the solution to obtain negatively charged hollow silica;

[0055] (3) Evenly mix positively charged alumina and lithium oxide, negatively charged hollow silica and pretreated β-eucryptite, and sinter to obtain the described ultra-low expansion coefficient eucryptite stone.

[0056] The molar ratio of hollow silica, alumina and lithium oxide is 1:1:1.

[0057] The concrete method of step (1) is:

[0058] (1-1) take styrene as raw material earlier, polystyrene microspheres are obtained th...

Embodiment 3

[0070] A kind of preparation method of ultra-low expansion coefficient eucryptite, concrete steps are as follows:

[0071] (1) Using polystyrene as a template, tetraethyl orthosilicate is hydrolyzed to obtain hollow silica;

[0072] (2) Aluminum oxide and lithium oxide are then placed in polydiallyl dimethyl ammonium chloride solution for immersion treatment to obtain positively charged aluminum oxide and lithium oxide, and hollow silicon dioxide is placed in catalase Immersion treatment in the solution to obtain negatively charged hollow silica;

[0073] (3) Evenly mix positively charged alumina and lithium oxide, negatively charged hollow silica and pretreated β-eucryptite, and sinter to obtain the described ultra-low expansion coefficient eucryptite stone.

[0074] The molar ratio of hollow silica, alumina and lithium oxide is 1:1:1.

[0075] The concrete method of step (1) is:

[0076] (1-1) take styrene as raw material earlier, polystyrene microspheres are obtained th...

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Abstract

The preparation method comprises the following steps: by taking polystyrene as a template, carrying out hydrolysis reaction on tetraethoxysilane to obtain hollow silicon dioxide; then putting aluminumoxide and lithium oxide into a polydiallyldimethylammonium chloride solution for dipping treatment to obtain aluminum oxide and lithium oxide with positive charges, and putting hollow silicon dioxideinto a catalase solution for dipping treatment to obtain hollow silicon dioxide with negative charges; and uniformly mixing the aluminum oxide and lithium oxide with positive charges, the hollow silicon dioxide with negative charges and the pretreated beta eucryptite, and sintering.

Description

technical field [0001] The invention relates to a preparation method of eucryptite, in particular to an ultra-low expansion coefficient eucryptite and a preparation method thereof. Belongs to the technical field. Background technique [0002] Thermal expansion and contraction are a basic thermal property of objects in nature, but thermal expansion and contraction have a profound impact on today's integrated circuits. When the thermal expansion coefficients between the integrated circuit substrate and the chip material do not match, thermal stress will occur, thereby shortening the semiconductor Chip lifetime. For this reason, it is very important to compound circuit substrates by selecting materials with relevant low expansion coefficients or negative expansion coefficients. The volume of the material decreases with the increase of the ambient temperature, that is, the thermal expansion coefficient of the material is less than zero. Such materials are called negative therm...

Claims

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Application Information

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IPC IPC(8): C01B33/26
CPCC01B33/26C01P2006/32
Inventor 许俊苏来峰
Owner 淄博辰东新材料有限公司