Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing silicon carbide refractory material by taking polycarbosilane as binding agent

A technology of polycarbosilane and refractory materials, which is applied in the field of preparing silicon carbide refractory materials, and can solve problems such as low operating temperature, low grade of silicon carbide refractory materials, and difficulty in preparing thick-sized products.

Active Publication Date: 2014-03-26
LUOYANG SHENJIA KILN
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems that the silicon carbide refractory materials prepared by the current existing methods are of low grade, or the use temperature is not high, and the thick-sized products are difficult to prepare, the purpose of the present invention is to provide a new preparation method using polycarbosilane as a binder. Silicon carbide refractory method to overcome the above defects

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
  • Method for preparing silicon carbide refractory material by taking polycarbosilane as binding agent
  • Method for preparing silicon carbide refractory material by taking polycarbosilane as binding agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Polycarbosilane is used as a binder, and silicon carbide particles (particle sizes are 1.43-2.5mm, 0.5-1.43mm, 240 mesh, 2000 mesh) are used to form raw materials, and the mass percentages are 3% and 67% respectively. , 10%, 15%, 5% of the proportion of weighing. The above raw materials were kneaded on a planetary forced mixer for 10 minutes, and the uniformly mixed materials were machine-pressed into a green body, and then the green body was dried in an oven at 100°C for 6 hours. The dried samples were placed in a vacuum furnace and sintered at 1300 °C for 5 h. see figure 1 , the phase composition of the product detected by XRD is mainly silicon carbide phase, a small amount of Si 2 N 2 O is due to slight oxidation of the sample during sintering; see figure 2 , after the precursor is sintered, a large number of fibrous nano-whiskers are formed inside the product; the product body density is 2.55g cm -3 , The flexural strength is 30.6MPa.

Embodiment 2

[0034] Polycarbosilane is used as a binder, and silicon carbide particles (particle sizes are 1.43-2.5mm, 0.5-1.43mm, 240 mesh, 2000 mesh) are used to form raw materials, and the mass percentages are 7% and 60% respectively. , 8%, 16%, 9% weighing. The above raw materials were kneaded on a planetary forced mixer for 20 minutes, and the uniformly mixed materials were pounded to form a green body, and then the green body was dried in an oven at 110°C for 4 hours. The dried samples were placed in an argon atmosphere furnace and sintered at 1500 °C for 1 h. The phase composition of the product detected by XRD is mainly silicon carbide phase, and the volume density of the product is 2.58g cm -3 , The flexural strength is 31.1MPa.

Embodiment 3

[0036] Polycarbosilane is used as a binder, and silicon carbide particles (particle sizes are 1.43-2.5mm, 0.5-1.43mm, 240 mesh, 2000 mesh) are used to form raw materials, and the mass percentages are 10% and 55% respectively. , 5%, 20%, 10% of the proportion of weighing. The above raw materials were kneaded on a planetary forced mixer for 5 minutes, and the uniformly mixed materials were machine-pressed to form a green body, and then the green body was dried in an oven at 80°C for 12 hours. The dried samples were placed in a vacuum furnace and sintered at 1400 °C for 3 h. The phase composition of the product detected by XRD is mainly silicon carbide phase, and the volume density of the product is 2.6g cm-3 , The flexural strength is 35.4MPa.

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
Body denseaaaaaaaaaa
Flexural strengthaaaaaaaaaa
Body denseaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a silicon carbide refractory material by taking polycarbosilane as a binding agent. According to the method, a raw material is made up of a silicon carbide precursor, namely, polycarbosilane, as a binding agent, and silicon carbide in grain composition, and the silicon carbide formed through in-situ reaction in the sintering process of polycarbosilane is used as binding phase to ultimately prepare a pure silicon carbide product. The added polycarbosilane plays the role of the binding agent in the pressing process, so that a blank has certain strength, the operability is improved, and meanwhile the polycarbosilane can be converted into silicon carbide in situ in the sintering process, so that the function of binding silicon carbide grains is achieved, and the property of a silicon carbide refractory material product is improved.

Description

technical field [0001] The invention relates to a method for preparing a silicon carbide refractory material, in particular to a method for preparing a silicon carbide refractory material by using polycarbosilane as a binder. Background technique [0002] Silicon carbide refractories are widely used in various smelting furnace linings, high-temperature kiln components, supports, crucibles and non-ferrous metal smelting due to their excellent properties such as high temperature strength, high thermal conductivity, high temperature resistance, corrosion resistance and impact resistance. Industrial high-temperature indirect heating materials and other fields. [0003] At present, the preparation of silicon carbide refractories can be divided into those that are bonded with silicon dioxide, those that are bonded with clay, those that are bonded with alumina, and those that are bonded with silicon nitride. The biggest feature of silicon carbide refractories is their high strengt...

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): C04B35/66C04B35/567C04B35/634C04B35/622
Inventor 蔡泽
Owner LUOYANG SHENJIA KILN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com