Method for preparing spherical silicon dioxide fine powder high in insulation property

A spherical silicon dioxide, high insulating technology, applied in the directions of silicon dioxide, silicon oxide, energy input, etc., can solve the problems of affecting the insulation of fillers, affecting the heat resistance and electrical properties of downstream products, and achieving low production costs , good insulation, low ion content and pH effect

Active Publication Date: 2017-04-26
JIANGSU NOVORAY NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These will seriously affect the insulation of fillers and affect the heat resistance and electrical properties of downstream products

Method used

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  • Method for preparing spherical silicon dioxide fine powder high in insulation property

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Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, a kind of preparation method of high insulation spherical silica powder, comprises combustion furnace and classifier, is connected with induced draft fan on the classifier, is provided with between the discharge port of combustion furnace and the feed port of classifier. Conveying pipeline, said conveying pipeline is provided with a humidifying device for increasing the humidity in the pipeline, and a diluent air inlet is provided on the conveying pipeline behind the humidifying device; the preparation steps are as follows:

[0025] (1) Raw materials: Silica micropowder with a purity of more than 99.8% is used as the raw material. The conductivity EC of the raw material is less than 0.5 μS / cm, and the Na + / K + Less than 0.5ppm;

[0026] (2) Combustion: Oxygen is used as the carrier gas, natural gas is used as the combustible gas, and oxygen is used as the combustion aid. Under the protection of the carrier gas, the raw materials are added to the combusti...

Embodiment 2

[0029] Embodiment 2, a kind of preparation method of high insulation spherical silica powder, comprises combustion furnace and classifier, is connected with induced draft fan on the classifier, is provided with between the discharge port of combustion furnace and the feed port of classifier. Conveying pipeline, through the induced draft fan, the powder is sucked out from the combustion furnace and enters the classifier through the conveying pipeline for collection. The conveying pipeline is provided with a humidifying device for increasing the humidity in the pipeline, and a diluent air inlet is provided on the conveying pipeline behind the humidifying device; the preparation steps are as follows:

[0030] (1) Raw material: Silica micropowder with a purity of 99.89% is used as the raw material, and the conductivity EC of the raw material is 0.2μS / cm, Na + 0.39ppm;

[0031] (2) Combustion: Oxygen is used as the carrier gas, natural gas is used as the combustible gas, and oxyge...

Embodiment 3

[0034]Embodiment 3, a kind of preparation method of high insulation spherical silica powder, comprises combustion furnace and classifier, is connected with induced draft fan on the classifier, is provided with between the discharge port of combustion furnace and the feed port of classifier. Conveying pipeline, through the induced draft fan, the powder is sucked out from the combustion furnace and enters the classifier through the conveying pipeline for collection. The conveying pipeline is provided with a humidifying device for increasing the humidity in the pipeline, and a diluent air inlet is provided on the conveying pipeline behind the humidifying device; the preparation steps are as follows:

[0035] (1) Raw material: Silica micropowder with a purity of 99.89% is used as the raw material, and the conductivity EC of the raw material is 0.2μS / cm, Na + 0.39ppm;

[0036] (2) Combustion: Oxygen is used as the carrier gas, natural gas is used as the combustible gas, and oxygen...

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Abstract

The invention provides a method for preparing spherical silicon dioxide fine powder high in insulation property. A combustion furnace and a classifier are included. The classifier is connected with a draught fan, a conveying pipeline is arranged between a discharging opening of the combustion furnace and a feed inlet of the classifier, and the conveying pipeline is provided with a humidifying device and a diluent air inlet. During preparation, silicon dioxide fine powder with the purity of 99.8% or above is selected as the raw material and is combusted by the combustion furnace to obtain spherical silicon dioxide fine powder, then the spherical silicon dioxide fine powder enters the conveying pipeline, air or inert gas serves as a diluent, combustion waste heat of the combustion furnace serves as impurity removal heat, the humidity of the diluent in the conveying pipeline is controlled through the humidifying device, the spherical silicon dioxide fine powder is subjected to impurity removal, and finally the spherical silicon dioxide fine powder without impurities is collected through the classifier. The prepared silicon dioxide fine powder has a low ion content and shows a better filler insulation property, and heat resistance and electric performance of downstream products produced through the method are more excellent.

Description

technical field [0001] The invention relates to a preparation method of silica micropowder, in particular to a preparation method of highly insulating spherical silica micropowder. Background technique [0002] Spherical silica powder has important uses in semiconductor materials, especially for mobile phones, large servers, and integrated circuits, which have higher and higher requirements for packaging materials, not only requiring reasonable particle size distribution, but also higher insulation requirements (that is, heat resistance High performance and electrical performance requirements). In order to meet the new requirements of the current electronics industry, it is necessary to control the particle size distribution of the product and prepare spherical silica powder with low ion content. [0003] current technology: [0004] CN 101746767 A "A Method for Preparing High-Purity Spherical Nano-Silicon Dioxide" discloses a method for preparing high-purity spherical sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18
CPCY02P20/129C01B33/18C01P2004/32C01P2004/61C01P2004/62C01P2006/40C01P2006/80
Inventor 张建平姜兵王红斌
Owner JIANGSU NOVORAY NEW MATERIAL CO LTD
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