摘要
笔者对三个天然烧变高岭石样品进行了系统的化学分析、X射线衍射、红外吸收光谱、差热和热重分析及27Al、29Si魔角旋转核磁共振研究。阐明三个样品为高岭石在不同温度梯度下的产物，其中几样品为低温产物，受热温度大约为500℃．为典型的变高岭石结构；HY样品为高温产物，已有石英晶出，受热温度大约为1000℃左右；而P5样品则为P4和HY的过渡态，在其结构中，Si－O四面体片已发生了结构的崩塌和重组，而Al－O（OH）八面体片则仍保持变高岭石的结构，其受热温度大约为800℃。
Three samples of natural metakaolinite have been examined by chemical analysis , XRD,IR, DTA,TG and 27Al,29Si MAS NMR spectrometry. The results show that the three samples are the products of kaolinite heated at different temperatures of natural coal combustion. Samlpe P4 is the product at reIatively low temperature (~500), with a typical structure of metakaolinite.Sample HY is the pr0duct at high temperature (~1000℃) in the presence of quartz. The struc-ture of sample P5 lies between sample P4 and sample HY. Its Si-O sheet has been broken and rear-ranged, and the Al-O sheet still maintains the original structure. Its heating temperature is about 800℃ .
出处
《矿物学报》
CAS
CSCD
北大核心
1996年第2期165-169,共5页
Acta Mineralogica Sinica
基金
国家自然科学基金!49272085
