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A kind of preparation method of silica gel modified wood-based silicon carbide ceramic material

A technology based on silicon carbide and ceramic materials, which is applied in the field of preparation of wood-based silicon carbide ceramic materials, can solve the problems of complex preparation methods and performance needs to be further improved, and achieve simple operation methods, small mass change rate, and good corrosion resistance. Effect

Active Publication Date: 2021-03-23
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the invention of this material, it has been widely concerned by the academic and wood academic circles. Many scholars have studied its electromagnetic, physical, mechanical and shielding properties. It has a broader application prospect, but the preparation method is complicated and the performance needs to be further improved.

Method used

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  • A kind of preparation method of silica gel modified wood-based silicon carbide ceramic material
  • A kind of preparation method of silica gel modified wood-based silicon carbide ceramic material
  • A kind of preparation method of silica gel modified wood-based silicon carbide ceramic material

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specific Embodiment approach 1

[0040] A preparation method of silica gel modified wood-based silicon carbide ceramic material, comprising the steps of:

[0041] Step 1. Weigh a certain amount of wood powder, silicon powder, and silicon gel respectively, calculate the total mass after weighing, and set aside;

[0042] Step 2. Weigh a certain amount of graphene oxide. The quality of graphene oxide is 1 to 5% of the total mass described in step 1. Mix the weighed graphene oxide with the silicon gel weighed in step 1 evenly Finally, add wood powder and silicon powder to mix, stir evenly, and dry in an oven to obtain the first mixture, which is ready for use;

[0043] Step 3. Preheat and press the first mixture obtained in step 1. Under the protection of nitrogen, the processed sample is subjected to sintering reaction under programmed temperature control. After the reaction, a silica gel modified wood-based silicon carbide ceramic material is obtained. .

[0044] In the preparation method of a silica gel-modi...

specific Embodiment approach 2

[0067] A preparation method of silica gel modified wood-based silicon carbide ceramic material, comprising the steps of:

[0068] Step 1. Weigh a certain amount of wood powder, silicon powder, and silicon gel respectively, calculate the total mass after weighing, and set aside;

[0069] Step 2. Weigh a certain amount of graphene oxide. The quality of graphene oxide is 1 to 5% of the total mass described in step 1. Mix the weighed graphene oxide with the silicon gel weighed in step 1 evenly Finally, add wood powder and silicon powder to mix, stir evenly, and dry in an oven to obtain the first mixture, which is ready for use;

[0070] Step 3. The first mixture obtained in step 1 is dried, and the processed sample is under the protection of nitrogen, and the temperature is controlled for sintering reaction. After the reaction, a silica gel modified wood-based silicon carbide ceramic material is obtained. .

[0071] In the method for preparing a silica gel-modified wood-based si...

specific Embodiment approach 3

[0094] A preparation method of silica gel modified wood-based silicon carbide ceramic material, comprising the steps of:

[0095] Step 1. Weigh a certain amount of wood powder, silicon powder, and silicon gel respectively, calculate the total mass after weighing, and set aside;

[0096] Step 2. Weigh a certain amount of graphene oxide. The quality of graphene oxide is 1 to 5% of the total mass described in step 1. Mix the weighed graphene oxide with the silicon gel weighed in step 1 evenly Finally, add wood powder and silicon powder to mix, stir evenly, and dry in an oven to obtain the first mixture, which is ready for use;

[0097] Step 3. The first mixture obtained in step 1 is subjected to preheating and pressing or drying treatment respectively. Under the protection of nitrogen, the sample obtained after the treatment is subjected to sintering reaction under program temperature control, and the silica gel modified wood is obtained after the reaction. Silicon carbide based...

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Abstract

The invention relates to a preparation method of a silica gel modified wood-base silicon carbide ceramic material and belongs to the field of preparation of wood-base silicon carbide ceramic materials. The preparation method comprises the steps of respectively weighing a certain mass of wood flour, silica powder and silica gel, calculating the total mass, weighing a certain mass of graphene oxide,uniformly mixing weighed graphene oxide and silica gel weighed in the step 1, adding wood flour and silicon powder, uniformly mixing, putting the mixture into a drying oven, drying so as to obtain afirst mixture, respectively pre-hot-pressing or drying, and carrying out sintering reaction on the obtained sample through program temperature control under the protection of nitrogen, so as to obtainthe silica gel modified wood-base silicon carbide ceramic material, wherein the mass of graphene oxide is 1-5% of the total mass of step 1. The preparation method is simple and convenient and is relatively low in quality change rate and relatively good in corrosion resistance; and by virtue of pre-pressure thermal treatment, the silica gel modified wood-base silicon carbide ceramic material has relatively good electric conductivity.

Description

technical field [0001] The invention belongs to the field of preparation of wood-based silicon carbide ceramic materials; in particular, it relates to a method for preparing wood-based silicon carbide ceramic materials modified by silica gel. Background technique [0002] In today's world, natural disasters occur frequently, the ecological environment is constantly challenged and destroyed, and human health is facing serious threats. Therefore, more and more people pay more attention to environmental protection issues. With the implementation of the country's "sustainable development" strategy, a large number of environmentally friendly materials continue to come out. While human beings pay attention to the use of green materials, they should also pay enough attention to the green preparation methods of materials. [0003] Due to the advantages of easy control of the sol-gel process, mild reaction conditions, safety, greenness and non-toxicity, etc., it has attracted more a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/565C04B35/622
CPCC04B35/573C04B35/622C04B2235/3418C04B2235/425C04B2235/6562C04B2235/6565C04B2235/96
Inventor 苗媛媛杨柳刘镇波李瑞李泓漪刘一星林斌
Owner NORTHEAST FORESTRY UNIVERSITY
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