Preparation method of amorphous SiOC ceramic powder

A ceramic powder and amorphous technology, which is applied in the field of preparation of amorphous SiOC ceramic powder, can solve the problems of high-purity amorphous SiOC ceramic powder, low purity of amorphous SiOC ceramic powder, and difficulty in industrial application. Achieve the effect of controllable powder particle size distribution, solve the problem of high cost of raw materials, and easy control of structure and performance

Active Publication Date: 2015-01-21
常州宇超钢管有限公司
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purity of the amorphous SiOC ceramic powder prepared by this method is low and contains a large amount of residual SiO 2 powder and undissolved C powder, and the yield is low
Therefore, it is not easy to realize industr

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of amorphous SiOC ceramic powder
  • Preparation method of amorphous SiOC ceramic powder
  • Preparation method of amorphous SiOC ceramic powder

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] A preparation method of amorphous SiOC ceramic powder, comprising the following steps:

[0032] 1) Using oxygen containing 10.08wt%, the main chain is Si-CH 2 -Si, and Si and CH in the main chain at the same time 3 The linear polycarbosilane (LPCS) with H groups linked together as a precursor polymer, the precursor in N 2 Under the atmosphere, from room temperature, the heating rate was raised to 190 °C at a rate of 10 °C / min, and the temperature was kept for 1 h to conduct cross-linking and curing, and then the cross-linked and cured product was crushed and passed through a 60-mesh sieve to obtain precursor particles;

[0033] 2) Place the precursor particles in a tube furnace, at N 2 Under the atmosphere, from room temperature, the temperature was raised to 900 °C at a heating rate of 2 °C / min, kept for 1 h, and then cooled to room temperature with the furnace after the insulation, to obtain pyrolytic ceramic particles with irregular particle mor...

Example Embodiment

[0037] Example 2

[0038] A preparation method of amorphous SiOC ceramic powder, comprising the following steps:

[0039] 1) Using oxygen containing 10.08wt%, the main chain is Si-CH 2 -Si, and Si and CH in the main chain at the same time 3 The linear polycarbosilane (LPCS) in which the group is connected to the H group and the main chain is Si-O-Si, and the Si in the main chain is simultaneously and CH 3 The linear polysiloxane (LPSO) with an average relative molecular weight of 1700-3200 is used as the precursor polymer, and the mass ratio of polycarbosilane and polysiloxane is 75:25. Mixing, magnetic stirring for 20min, the precursor in N 2 Under the atmosphere, from room temperature, the heating rate was raised to 190 °C at a rate of 10 °C / min, and the temperature was kept for 1 h for cross-linking and curing, and then the cross-linked and cured product was crushed and passed through a 60-mesh sieve to obtain precursor particles;

[0040] 2) Place the precursor particl...

Example Embodiment

[0044] Example 3

[0045] A preparation method of amorphous SiOC ceramic powder, comprising the following steps:

[0046] 1) Using oxygen containing 10.08wt%, the main chain is Si-CH 2 -Si, and Si and CH in the main chain at the same time 3 The linear polycarbosilane (LPCS) in which the group is connected to the H group and the main chain is Si-O-Si, and the Si in the main chain is simultaneously and CH 3 The linear polysiloxane (LPSO) with an average relative molecular weight of 1700-3200 is used as the precursor polymer, and the polycarbosilane and polysiloxane are mixed in a mass ratio of 60:40. , magnetic stirring for 20min, the precursor was 2 Under the atmosphere, from room temperature, the heating rate was raised to 190 °C at a rate of 10 °C / min, and the temperature was kept for 1 h to conduct cross-linking and curing, and then the cross-linked and cured product was crushed and passed through a 40-mesh sieve to obtain precursor particles;

[0047] 2) Place the precu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of amorphous SiOC ceramic powder, which comprises the following steps: 1) carrying out low-temperature crosslinking curing on a precursor polymer, crushing the crosslinking curing product, and screening to obtain precursor particles, wherein the precursor polymer is linear polycarbosilane or a mixture of linear polycarbosilane and linear polysiloxane; 2) carrying out pyrolysis reaction on the precursor particles to obtain pyrolysis ceramic particles with irregular particle morphology, of which the particle size is 60 mu m-2mm; and 3) carrying out ball milling on the pyrolysis ceramic particles to obtain the amorphous SiOC ceramic powder. The amorphous SiOC ceramic powder has the characteristics of controllable Si, O and C element contents, controllable powder particle size and controllable crystallization temperature. The method has the advantages of simple preparation technique, low cost and the like, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a preparation method of ceramic powder, in particular to a preparation method of amorphous SiOC ceramic powder. Background technique [0002] Due to the excellent mechanical properties, oxidation resistance and high temperature creep resistance of amorphous SiOC ceramics, it is an excellent lightweight and high temperature resistant structural material. Composite materials based on it have received extensive attention and in-depth research. Aviation, aerospace, automobile, machinery, petrochemical and electronic industries have a wide range of applications. [0003] At present, there are two common methods for preparing amorphous SiOC ceramic powder: one is laser aerosol spray pyrolysis. For example, France uses small molecule silicon ether and small molecule silane to prepare amorphous SiOC ceramic powder with high purity and ultrafine particles (20nm-30nm) by laser aerosol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B35/01C04B35/626
Inventor 王红洁马明波牛敏夏鸿雁史忠旗
Owner 常州宇超钢管有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap