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Preparation method of light spherical silica

A spherical silica, lightweight technology, applied in the direction of silica, silicon oxide, chemical instruments and methods, etc., can solve the problems of large specific surface area, high oil absorption value, insufficient strength, etc., and achieve simple process and high specific surface area Low, high sphericity effect

Active Publication Date: 2019-10-29
ANHUI ESTONE MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition of hollow glass microspheres is complex and the strength is not enough. When applied to copper clad laminates, it is easy to delaminate, and it is easy to leave semicircular defects after drilling, which affects the performance of the board.
Due to the large specific surface area and high oil absorption value of porous silica, it is difficult to add to the application system, which will greatly increase the processing viscosity and reduce the physical properties of the product

Method used

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  • Preparation method of light spherical silica
  • Preparation method of light spherical silica

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Fully investigate the formation history of quartz ore, screen out quartz ore powder containing rich fluid inclusions, use the weight liquid to classify, and screen out the specific gravity less than 1.8g / cm 3 Quartz powder; crush the raw material to particle size D 50 2 to 30 μm; the screened powder is passed into the flash furnace with argon as the carrier gas, the temperature in the high temperature area of ​​the flash furnace is controlled at 1700°C, and four nozzles are designed to blow each other in the high temperature area to make the powder form in the high temperature area Circulation, smoldering for 30 minutes; stop calcination, control the airflow pressure to 0.4MPa, collect dust, and obtain the product spherical closed-cell silica.

Embodiment 2

[0023] The operation of embodiment 2 and embodiment 3 is the same as embodiment 1.

[0024] The raw material and product specific gravity data of embodiment 1-3 are as shown in table 1.

[0025] Table 1

[0026]

[0027] Depend on figure 1 It can be seen that the specific gravity of the prepared product is small, the sphericity is high, and the shape is uniform.

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Abstract

The invention discloses a preparation method of light spherical silica, and relates to the technical field of inorganic materials. The preparation method comprises the steps that quartz mineral powdercontaining abundant fluid inclusions is screened, quartz powder with the specific gravity less than 1.8g / cm<3> is screened and used as a raw material, and the raw material is pulverized; and the pulverized raw material is introduced into a flash-burning furnace with inert gas carrier gas, airflow circulation is carried out in a spheroidized flame area, the airflow pressure intensity is adjusted,powder with the specific gravity less than 1.5g / cm<3> enters a dust collecting chamber for collecting, and the spherical closed-hole silica is obtained. The preparation method is simple in process, the prepared spherical silica has the characteristics of low specific gravity, high strength, low specific surface area, low oil absorption value, high sphericity degree and the like; and the sphericalsilica can be used as a material with low dielectric constant and low dielectric loss and is used for the field of high frequency and high speed copper clad laminates for 5G communication and the like.

Description

Technical field: [0001] The invention relates to the technical field of inorganic materials, in particular to a preparation method of light spherical silica. Background technique: [0002] The stable performance and rich content of silicon dioxide make it widely used in various fields, and the excellent structural performance of the hollow structure further expands the application field of silicon dioxide. Lightweight spherical material is a new type of inorganic material, which is widely used in copper clad laminates, potting glue, automotive plastics, coatings, paints, heat insulation and other materials. [0003] At present, there are two main forms of lightweight spherical silica products: hollow glass microspheres and porous silica. Hollow glass microspheres have complex components and insufficient strength. When applied to copper-clad laminates, they are easy to delaminate, and they are easy to leave semi-circular defects after drilling, which affects the performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18
CPCC01B33/181C01P2004/03C01P2004/32C01P2006/10
Inventor 蒋学鑫王亚娟郭敬新张轲轲
Owner ANHUI ESTONE MATERIAL TECH CO LTD
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