CAJ | 학술논문

以粉煤灰和炭黑为原料,采用碳热还原氮化法成功制备出β-Sialon基复合材料.研究了加热温度和配料组成对合成过程的影响,分析了材料的生成过程.采用XRD和SEM手段表征了合成材料的相组成和显微结构.结果表明:升高加热温度,增大炭黑与粉煤灰的质量比均可以促进β-Sialon的生成；将炭黑与粉煤灰质量比为0.56的试样加热至1723K并保温6h,可以合成β-Sialon基复合材料;合成材料中β-Sialon多以粒状形式存在,平均粒径为2～3μm；β-Sialon基复合材料的生成过程包括O'-Sialon、X-Sialon和β-Sialon的生成及O'-Sialon和X-Sialon向β-Sialon的转化过程.
이분매회화탄흑위원료,채용탄열환원담화법성공제비출β-Sialon기복합재료.연구료가열온도화배료조성대합성과정적영향,분석료재료적생성과정.채용XRD화SEM수단표정료합성재료적상조성화현미결구.결과표명:승고가열온도,증대탄흑여분매회적질량비균가이촉진β-Sialon적생성；장탄흑여분매회질량비위0.56적시양가열지1723K병보온6h,가이합성β-Sialon기복합재료;합성재료중β-Sialon다이립상형식존재,평균립경위2～3μm；β-Sialon기복합재료적생성과정포괄O'-Sialon、X-Sialon화β-Sialon적생성급O'-Sialon화X-Sialon향β-Sialon적전화과정.
β-Sialon based composites were successfully prepared from tly ash and carbon black under nitrogen atmosphere by carbothermal reduction-nitridation process.Effects of heating temperature and raw materials composition on synthesis process were investigated,and the formation process of the composites was also discussed.The phase composition and microstructure of the composites were characterized by X-ray diffraction and scanning electronic microscopy.The results show that increasing heating temperature or mass ratio of carbon black to fly ash can promote the formation ofβ-Sialon.The β-Sialon based composites can be synthesized at 1723 K for 6 h while heating the sample with mass ratio of carbon black to fly ash of 0.56.The as-received β-Sialon in the composites exists as granular with an average particle size of 2-3 μm.The preparation process ofβ-Sialon based composites includes the formation of O'-Sialon,X-Sialon and β-Sialon as well as the conversion processes of O'-Sialon and X-Sialon to β-Sialon.