灰分对煤基碳化硅形貌的影响  

Effect of Ash Content on Morphology of Coal Based Silicon Carbide

作　　者：张娜 詹海鹃 王康[1] 毕淑娴[1] 马保军 刘万毅[1] ZHANG Na;ZHAN Haijuan;WANG Kang;BI Shuxian;MA Baojun;LIU Wanyi(College of Chemistry and Chemical Engineering,Ningxia University,Ningchuan 750021,China;Key Laboratory and Energy,Sources ＆Engineering,Ningchuan 750021,China)

机构地区：[1]宁夏大学化学化工学院,宁夏银川750021 [2]宁夏大学能源化工重点实验室,宁夏银川750021

出　　处：《材料科学与工程学报》2018年第3期465-469,共5页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(21166021;51364038);宁夏高等学校一流学科建设资助项目(NXYLXK2017A04);宁夏自然科学基金资助项目(NZ16003);宁夏大学引进人才科研资助项目(BQD2015013)

摘　　要：以灰分含量不同的碳源和工业级白炭黑为反应原料,采用碳热还原法,制备出具有不同尺寸、不同形貌的β-SiC颗粒,并对其进行表征。结果表明:在1600℃氩气气氛中,当采用石墨碎(灰分≤0.02%)为碳源时,出现两相SiC,随着碳源灰分的增加,产品呈单相β-SiC,进一步增加碳源灰分,β-SiC的晶粒尺寸和颗粒尺寸也增加。不同灰分条件下,单相和两相SiC的出现表明:灰分的增加有利于相变的发生,且其含量对碳化硅的相变有很大的影响。β-SiC particles with different size and morphology were prepared via carbon thermal reduction route using raw materials from industrial grade white carbon black to carbon sources with different ash contents.The SiC particles were characterized in order to see its structure,morphology and particle size.The results show that two kinds of SiC appear when graphite scrap（ash content is less than or equal to 0.02%）is used and the reaction takes place at 1600℃ in argon atmosphere.With increasing ash content in the carbon source,single phaseβ-SiC becomes dominant.For further increase of the carbon ash content,grain size and particle size of theβ-SiC also increase.The appearance of single phase and biphase SiC indicates that the existence of ash is conducive to SiC phase transition and generation.

关 键 词：灰分 Β-SIC 碳热还原法 晶粒尺寸 

分 类 号：O611[理学—无机化学] TQ536[理学—化学]