Alkali metal salt based Sialon powder material and preparation method thereof

A technology of alkali metal salts and powder materials, applied in the field of Sialon powder materials based on alkali metal salts and its preparation, can solve problems such as difficulty in repetition, high reaction temperature, complex reaction process, etc., and achieve good toughness and oxidation resistance Good, simple method and effect

Inactive Publication Date: 2015-08-19
WUHAN UNIV OF SCI & TECH
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The β-Sialon material prepared by this method has high purity, but the reaction temperature required by this method is high, reaching 1500 ° C, and the reaction process is complicated and difficult to repeat

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A Sialon powder material based on an alkali metal salt and a preparation method thereof. The preparation method is as follows: first use 60~66wt% of sodium chloride, 2~4wt% of sodium fluoride, 12~15wt% of aluminum powder, 6~8wt% of silicon powder and 13~15wt% of silicon dioxide Micropowder is used as a raw material, and 15 to 20 wt% of sodium azide is added to the raw material, and the mixture is uniformly mixed to obtain a mixture. Put the mixture into a corundum crucible, place the corundum crucible in a tubular corundum furnace, react in a nitrogen atmosphere at 1200-1300°C for 2.5-3.5 hours, cool to room temperature, and take out the product. Then the product is washed with water for 3~5 times, and dried at 90~110°C for 4~8 hours to obtain the Sialon powder material based on the alkali metal salt.

[0029] The Sialon powder material based on the alkali metal salt prepared in this embodiment is used to prepare Sialon-Al 2 o 3 -SiC composite refractory material, me...

Embodiment 2

[0031] A Sialon powder material based on an alkali metal salt and a preparation method thereof. The preparation method is: firstly use 60~66wt% sodium chloride, 4~6wt% sodium fluoride, 12~15wt% aluminum powder, 6~8wt% silicon powder and 10~13wt% silicon dioxide Micropowder is used as a raw material, and 10 to 15 wt% of sodium azide is added to the raw material, and the mixture is uniformly mixed to obtain a mixture. Put the mixture into a corundum crucible, place the corundum crucible in a tubular corundum furnace, react in a nitrogen atmosphere at 1300-1400°C for 2.5-3.5 hours, cool to room temperature, and take out the product. Then the product is washed with water for 3~5 times, and dried at 90~110°C for 4~8 hours to obtain the Sialon powder material based on the alkali metal salt.

[0032] The Sialon powder material based on the alkali metal salt prepared in this embodiment is used to prepare Sialon-Al 2 o 3 -SiC composite refractory material, measured under atmospheric...

Embodiment 3

[0034]A Sialon powder material based on an alkali metal salt and a preparation method thereof. The preparation method is: first use 60~66wt% of magnesium chloride, 4~6wt% of sodium fluoride, 12~15wt% of aluminum powder, 5~6wt% of silicon powder and 13~15wt% of silicon dioxide micropowder as Raw materials, plus 15-20 wt% of sodium azide of the raw materials, mixed evenly to obtain a mixture. Put the mixture into a corundum crucible, place the corundum crucible in a tubular corundum furnace, and react in a nitrogen atmosphere at 1200-1300°C for 2.5-3.5 hours. Cool to room temperature and remove the product. Then the product is washed with water for 3~5 times, and dried at 90~110°C for 4~8 hours to obtain the Sialon powder material based on the alkali metal salt.

[0035] The Sialon powder material based on the alkali metal salt prepared in this embodiment is used to prepare Sialon-Al 2 o 3 -SiC composite refractory material, measured under atmospheric conditions: the normal ...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to an alkali metal salt based Sialon powder material and a preparation method thereof. The technical scheme includes: firstly taking 60-72wt% of sodium chloride or magnesium chloride, 2-6wt% of sodium fluoride, 9-15wt% of aluminum powder, 5-8wt% of silicon powder and 10-15wt% of silicon dioxide micropowder as raw materials, additionally adding sodium azide accounting for 10-20wt% of the raw materials, mixing the materials evenly to obtain a mixture, then loading the mixture into a corundum crucible, and placing the corundum crucible into a tubular corundum furnace, carrying out reaction at 1200-1400DEG C in nitrogen atmosphere for 2.5-3.5h, performing cooling to room temperature, and taking out the product, finally washing the product 3-5 times, and drying the product at 90-110DEG C for 4-8h, thus obtaining the alkali metal salt based Sialon powder material. The method provided by the invention has the characteristics of low cost and suitability for industrial production, and the prepared alkali metal salt based Sialon powder material has good oxidation resistance, high bending strength and excellent appearance characteristics.

Description

technical field [0001] The invention belongs to the technical field of Sialon powder materials. In particular, it relates to an alkali metal salt-based Sialon powder material and a preparation method thereof. Background technique [0002] Sialon material has good oxidation resistance, mechanical properties and thermal shock resistance under high temperature conditions, and also has the properties of small expansion coefficient, high chemical stability and corrosion resistance, so it has been widely used in engineering. As a binder for refractory materials, high-temperature components of some thermal energy equipment, metal cutting tools and grinding media, it can also be used to make bearings, valve bodies and sealing rings, showing excellent application prospects in high-temperature fields. [0003] Currently, Niu Jing and others synthesize Sialon materials with aluminum powder and silicon powder (Jing Niu, Kazuto Harada, Shota Suzuki, etc. Fabrication of mixed α / β-Sialon...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/599C04B35/626
Inventor 丁军刘建鹏祝洪喜邓承继李光强宋云飞
Owner WUHAN UNIV OF SCI & TECH
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