Control method of grain sizes of monodisperse silicon dioxide pellets

A technology of monodisperse silica microspheres and a control method, applied in the directions of silica and silicon oxide, can solve the problems of small particle size of silica microspheres and inability to realize continuous preparation, and achieve the effect of continuous preparation

Inactive Publication Date: 2013-09-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing monodisperse silica microsphere particle size control method cannot realize continuous preparation and the prepared silica microsphere particle size is small, and to provide a monodisperse silica microsphere particle size control method

Method used

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  • Control method of grain sizes of monodisperse silicon dioxide pellets
  • Control method of grain sizes of monodisperse silicon dioxide pellets
  • Control method of grain sizes of monodisperse silicon dioxide pellets

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specific Embodiment approach 1

[0017] Specific embodiment one: the method for controlling the particle size of monodisperse silica microspheres in this embodiment is implemented according to the following steps:

[0018] 1. Adjust the temperature of the reactor to 0-78.4°C, add 148-152ml of absolute ethanol and 40-44ml of ammonia solution into the reactor, stir evenly to obtain a mixture of absolute ethanol and ammonia;

[0019] 2. Dissolve 16-16.2g of TEOS (tetraethyl orthosilicate) in 19-21ml of absolute ethanol, and then add it to a constant pressure dropping funnel to obtain a mixed solution of TEOS and absolute ethanol;

[0020] 3. Open the constant pressure dropping funnel and add the mixed solution of TEOS and absolute ethanol dropwise to the mixed solution of absolute ethanol and ammonia water in step 1. After reacting for 3 hours, the seed solution is obtained. Take a drop of the seed solution and measure it with a dynamic laser analyzer The particle diameter of silicon dioxide microspheres in the ...

specific Embodiment approach 2

[0025] Embodiment 2: This embodiment is different from Embodiment 1 in that the temperature of the reactor is adjusted to 60°C. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the mass concentration of the ammonia solution in step 1 is 25%. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a control method of the grain sizes of monodisperse silicon dioxide pellets, relating to a method for controlling the grain sizes of the monodisperse silicon dioxide pellets and aiming at solving the problems that an existing control method of the grain sizes of the monodisperse silicon dioxide pellets cannot realize continuous preparation and the prepared silicon dioxide pellets have small grain sizes. The control method comprises the following steps: 1, preparing a mixed liquor of absolute ethyl alcohol and ammonium hydroxide; 2, preparing a mixed liquor of TEOS (tetraethoxysilane) and absolute ethyl alcohol; and 3, dropwise adding the mixed liquor of TEOS and absolute ethyl alcohol into the mixed liquor of the absolute ethyl alcohol and ammonium hydroxide, reacting for 3 hours, then measuring the gain sizes of the silicon dioxide pellets in the solution by using a laser analysis meter, and adding the TEOS and water in batch according to a formula until the gain sizes of the silicon dioxide pellets reach the targeted gain size. According to the control method disclosed by the invention, the silicon dioxide pellets do not need to take out from a reactor, so that the continuous preparation can be realized and the silicon dioxide pellets with large gain sizes can be prepared; and the gain size of each silicon dioxide pellet is less than or equal to 5%.

Description

technical field [0001] The invention relates to a method for controlling the particle size of monodisperse silicon dioxide microspheres. Background technique [0002] With the rapid development of the information industry, microelectronics technology based on semiconductor materials has physical and technical limitations. If photons are used as the carrier of semiconductors, it will have unique advantages, and the above-mentioned problems of electrons as carriers will not exist. , as a new type of photonic information functional material, photonic crystals have attracted great attention. SiO 2 It is a non-toxic, odorless, and non-polluting non-metallic material. Due to its many unique functional properties, such as special photoelectric properties, high magnetoresistance, and nonlinear resistance, it still has high strength, high toughness, and good stability at high temperatures. and other advantages, making the preparation of SiO with high monodispersity and controllable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18
Inventor 赵九蓬赵长杰豆书亮潘磊李垚
Owner HARBIN INST OF TECH
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