硅酸盐通报2024，Vol.43Issue(7)：2680-2684,5.
碳热还原氮化硅藻土制备Si2N2O/SiC复合粉体
Preparation of Si2N2O/SiC Composite Powders Using Carbothermal Reduction Nitridation Method for Diatomite
摘要
Abstract
Silicon oxynitride(Si2N2O)is a high-performance refractory and high-temperature structural material,which has advantages such as excellent creep resistance,corrosion resistance,and oxidation resistance.In this work,diatomite was used as silicon source,acetylene carbon black was used as reducing agent,and the Si2N2O/SiC composite powders were synthesized in situ on the surface of diatomite through carbothermal reduction nitridation method.The samples were characterized by X-ray diffraction(XRD)analysis,scanning electron microscopy(SEM),and N2 adsorption/desorption isotherms.The results indicate that under the condition of raw materials ratio m(diatomite)∶m(acetylene carbon black)=1∶1,the SiO2 completely transforms into Si2 N2O and β-SiC after calcination at 1 450 ℃ for 4 h,and the sample shows a spherical morphology with mesoporous structure,while a large number of layered small particles distribute around the large particles.As a high-performance high-temperature structural material,Si2N2O/SiC composite powders could be a promising candidate for application in the field of structural composite materials.关键词
Si2N2O/SiC/硅藻土/碳热还原氮化法/多孔结构/高温结构材料/复合粉体Key words
Si2N2O/SiC/diatomite/carbothermal reduction nitridation method/porous structure/high-temperature structural material/composite powder分类
化学化工引用本文复制引用
万赣,匡猛,黄思源,张琎珺,王平,张声洲..碳热还原氮化硅藻土制备Si2N2O/SiC复合粉体[J].硅酸盐通报,2024,43(7):2680-2684,5.基金项目
江西省教育科学"十四五"规划2023年度课题(23GZYB097) （23GZYB097）
