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Preparation method of nano silicon carbide particles based on ferric nitrate shape regulator

A nano-silicon carbide and ferric nitrate technology, applied in chemical instruments and methods, carbon compounds, nanotechnology and other directions, can solve the problems of complex preparation process, uneven morphology and particle size, low yield, etc., and achieves simple preparation process, The effect of easy reaction process and high product purity

Pending Publication Date: 2022-08-02
内蒙古海特华材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing nano-silicon carbide particles based on an iron nitrate shape regulator in order to solve the problems of complex preparation process, low yield, and uneven shape and particle size of the existing silicon carbide powder

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  • Preparation method of nano silicon carbide particles based on ferric nitrate shape regulator
  • Preparation method of nano silicon carbide particles based on ferric nitrate shape regulator

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specific Embodiment approach 1

[0022] Embodiment 1: The present embodiment is a preparation method of nano-silicon carbide particles based on ferric nitrate shape regulator, which is realized according to the following steps:

[0023] 1. Preparation of silicon and carbon precursor powder:

[0024] The polydimethylsiloxane is mixed with the curing agent and then cured, and then carbonized. The carbonized product is added to the high-speed mixer together with the phenolic resin powder and the iron nitrate powder for processing to obtain the silicon and carbon precursor powder;

[0025] 2. Sintering and impurity removal:

[0026] The above-mentioned silicon and carbon precursor powders are put into a graphite crucible, placed in a high-temperature sintering furnace under the protection of argon gas, heated to 1250 ℃ ~ 1600 ℃, and reacted for 5 to 10 hours to obtain the initial product, after the impurity removal treatment, the obtained base The nano-silicon carbide particles of the ferric nitrate shape regula...

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment is different from Embodiment 1 in that the mass ratio of the polydimethylsiloxane to the curing agent in step 1 is 9:1. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that the carbonization treatment in step 1: the temperature is raised to 800°C at a rate of 1-3.5°C / min, and the temperature is kept for 2-5h. Other steps and parameters are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of nano silicon carbide particles based on a ferric nitrate shape regulator, belongs to the technical field of preparation of silicon carbide powder, and aims to solve the problems of complex preparation process, low yield and non-uniform morphology and granularity of the existing silicon carbide powder. The method comprises the following steps: 1, preparing silicon and carbon precursor powder; and 2, sintering and removing impurities to obtain the nano silicon carbide particles based on the ferric nitrate shape regulator. According to the invention, ferric nitrate is adopted as the shape regulator, and the prepared nano silicon carbide particles based on the ferric nitrate shape regulator are uniform in particle size distribution. Solvent components such as water are not introduced in the whole preparation process, reactants are introduced in a solid form, the reaction process is easy to control, the product purity is high, the process is simple, the yield is improved, and the method is suitable for industrial production. The unique combination of the carbon source precursor, the silicon source precursor and the ferric nitrate provides a material basis for microtopography adjustment of silicon carbide. The method is suitable for preparing the nano silicon carbide particles based on the ferric nitrate shape regulator.

Description

technical field [0001] The invention belongs to the technical field of silicon carbide powder preparation, in particular to a preparation method of nano-silicon carbide particles based on a ferric nitrate shape regulator. Background technique [0002] Ceramic materials have become irreplaceable materials in many fields due to their excellent mechanical properties and high temperature stability. The innovation of ceramic powder preparation technology is of great significance for the development of ceramic materials. Silicon carbide has excellent properties such as light weight, high hardness, high strength, acid and alkali resistance and high temperature resistance. Particle reinforced ceramic refers to a reinforced or toughened ceramic matrix composite material obtained by introducing particles into the ceramic matrix as the second phase reinforcement phase, making it evenly dispersed and compounding with the matrix, which requires the use of silicon carbide particles with ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/977B82Y40/00
CPCC01B32/977B82Y40/00C01P2004/32C01P2002/72C01P2004/04
Inventor 王志江
Owner 内蒙古海特华材科技有限公司