摘要
以高岭石-聚丙烯酰胺插层复合物为前驱体,采用原位碳热还原、氮化反应技术,在1 400℃合成了S ia lon粉体。并运用XRD,FT-IR,TEM等技术对合成产物的组成、结构及形貌特征进行研究发现:以插层复合物为前驱体的合成反应,β-′S ia lon,O-′S ia lon为主晶相,不含方石英;而以高岭石-碳混合物为原料的合成产物中,相组成复杂,β-′S ia lon含量较低,并有氧化物。高岭石插层复合物原位碳热还原、氮化反应是合成β-′S ia lon的一种新颖而有效的方法,插层复合物有序的纳米级层状结构特征是提高碳热还原、氮化反应效率的主要原因。
Sialon was synthesized from kaolinite - polyacrylamide intercalation compound by carbothermal reduction and nitridation（CRN） proressing at 1 400℃. Kaolinite-carbon mixture was treated at the same condilion as the intercalation compound for comparison. XRD,FT-IR.and TEM were used to study the phases,structure and morphology of products. In the CRN product from the intercalation compound.β＇-Sialon and O＇-Sialon are main phases. Oxides were reduced without cristohalite heing detected. In addition,in the product from the mixture,the phases are more complex with lower conleot of β＇- Sialon than in the intercalation compound CRN product. The in-situ carbothermal reduction and nitridation processing of kaolinite is a novel and effective method of Sialon synthesis. The layered nano-structure of the intercalation compound is the main factor of highly effective carhothermal reduction and nitridation processing.
出处
《矿物岩石》
CAS
CSCD
北大核心
2005年第3期79-82,共4页
Mineralogy and Petrology
基金
国家自然科学基金项目(批准号:40072014)
教育部科学技术研究重点项目(批准号:204113)
广西自然科学基金项目(批准号:桂科基0448078)
广西高校百名中青年学科带头人基金项目(2004(76))
