摘要
以稻壳粉为原料,硝酸钴、硝酸铁为催化剂,采用催化法合成SiC晶须,研究了热处理温度和催化剂种类对合成SiC晶须含量和形貌的影响。研究结果表明,在硝酸镍或硝酸铁的催化作用下,1200℃是稻壳合成SiC的温度转变点。热处理温度的升高,有利于促进稻壳中SiO_(2)和C反应,提高SiC晶须生成量和晶粒尺寸。相较于添加硝酸钴,硝酸铁的添加有利于提高SiC晶须生成量,并且SiC晶须长径比增大,SiC晶须主要遵循VS生长机制。
SiC whiskers were synthesized by the catalytic method using rice husk powder as the raw material and cobalt nitrate and iron nitrate as catalysts,investigating the effects of heat treatment temperature and catalyst type on the content and morphology of the synthesized SiC whiskers.The findings indicate that,under the catalysis of nickel nitrate or iron nitrate,1200℃is the temperature transition point for the synthesis of SiC from rice husk.The increase in heat treatment temperature facilitates the reaction between SiO_(2) and C in rice husk and increases the formation and grain size of SiC whiskers.Compared to the addition of cobalt nitrate,the addition of iron nitrate is favorable to increasing the amount of SiC whiskers while also resulting in a larger aspect ratio for the whiskers,which primarily adhere to a VS growth mechanism.
作者
谭浩博
李勇庆
谭嘉林
陈洋
邓承继
丁军
吴智
娄晓明
TAN Hao-bo;LI Yong-qing;TAN Jia-lin;CHEN Yang;DENG Cheng-ji;DING Jun;WU Zhi;LOU Xiao-ming(School of Materials Science and Engineering,Hunan Institute of Technology,Hengyang 421002,China;The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《中国陶瓷》
CAS
CSCD
北大核心
2024年第12期18-24,共7页
China Ceramics
基金
湖南省教育厅资助科研项目(22B0856,20B161)
衡阳市“小荷”科技人才专项项目(衡市科协字〔2023〕45号)
衡阳市指导性计划项目(衡科发〔2023〕40号)
武汉科技大学省部共建耐火材料与冶金国家重点实验室开放基金项目(G202504)
湖南省自然科学基金项目(2021JJ40165,2022JJ30221)
湖南省应用特色学科材料科学与工程学科(湘教通〔2022〕351号)
湖南工学院学科类创新实践项目(2022SE172,2022SE185)。
关键词
SIC晶须
稻壳粉
催化法
显微结构
SiC whiskers
Rice husk powders
Catalytic method
Microstructure
