碳热还原氮化硅藻土制备Si2N2O/SiC复合粉体

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (7): 2680-2684.

所属专题：耐火材料

碳热还原氮化硅藻土制备Si₂N₂O/SiC复合粉体

万赣¹, 匡猛^2,3, 黄思源⁴, 张琎珺³, 王平⁴, 张声洲¹

1.赣州职业技术学院材料工程学院,赣州 341000;
2.深圳市标准技术研究院,深圳 518033;
3.中国建筑材料科学研究总院有限公司,北京 100024;
4.江西理工大学材料科学与工程学院,赣州 341000

收稿日期:2023-12-07 修订日期:2024-01-30 出版日期:2024-07-15 发布日期:2024-07-24
通信作者: 张声洲,博士,讲师。E-mail:249928712@qq.com
作者简介:万赣(1983—),男,副教授。主要从事非金属矿物材料的高附加值利用的研究。E-mail:68869510@qq.com
基金资助:
江西省教育科学“十四五”规划2023年度课题(23GZYB097)

Preparation of Si₂N₂O/SiC Composite Powders Using Carbothermal Reduction Nitridation Method for Diatomite

WAN Gan¹, KUANG Meng^2,3, HUANG Siyuan⁴, ZHANG Jinjun³, WANG Ping⁴, ZHANG Shengzhou¹

1. College of Materials Engineering, Ganzhou Polytechnic, Ganzhou 341000, China;
2. Shenzhen Institute of Standards and Technology, Shenzhen 518033, China;
3. China Building Materials Academy Co., Ltd., Beijing 100024, China;
4. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

Received:2023-12-07 Revised:2024-01-30 Online:2024-07-15 Published:2024-07-24

摘要/Abstract

摘要： 氧氮化硅(Si₂N₂O)是性能优良的耐火材料和高温结构材料,具有优异的抗蠕变性、耐腐蚀性和抗氧化性等优点。本工作利用硅藻土作为硅源,乙炔炭黑作为还原剂,通过碳热还原氮化法在硅藻土表面原位合成Si₂N₂O/SiC复合粉体。采用X射线衍射(XRD)分析、扫描电子显微镜(SEM)和N₂吸附/脱附等温线对样品进行表征。结果表明,在原料配比m(硅藻土)∶m(乙炔炭黑)=1∶1条件下,1 450 ℃煅烧4 h后,SiO₂完全转变成Si₂N₂O和β-SiC物相,样品整体呈球状形貌,大颗粒周围分布大量片层状小颗粒,并存在介孔结构。Si₂N₂O/SiC复合粉体作为性能优良的高温结构材料,有望在结构复合材料中得到广泛的应用。

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

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 Si₂N₂O 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.

Key words: Si₂N₂O/SiC, diatomite, carbothermal reduction nitridation method, porous structure, high-temperature structural material, composite powder

中图分类号:

TQ424.22

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.

WAN Gan, KUANG Meng, HUANG Siyuan, ZHANG Jinjun, WANG Ping, ZHANG Shengzhou. Preparation of Si₂N₂O/SiC Composite Powders Using Carbothermal Reduction Nitridation Method for Diatomite[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(7): 2680-2684.

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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

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