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采用溶液浸泡法制备地开石—醋酸钾插层复合物,利用热重-差热仪(TG-DSC)分析复合物的热稳定性,X射线衍射(XRD)、傅里叶红外光谱仪(FTIR)和场发射扫描电镜(FESEM)研究热处理温度对样品稳定性的影响。结果表明,热处理过程中的变化包括:300℃以下的低温反应阶段,吸附水脱去并伴随醋酸根离子烧失,d(002)由1.41 nm变成0.908 nm,再缩小至膨胀前的0.717 nm;400~900℃的中温反应,此阶段主要发生脱羟基作用,变成无定型偏地开石;900℃以上的高温反应,即固态相变阶段,生成莫来石和方石英。研究发现,地开石—醋酸钾热处理后,偏地开石的转变温度降低200℃左右,莫来石的相变转变温度升高30℃。
The diterpenoid-potassium acetate intercalation complex was prepared by solution immersion method. The thermal stability, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) ) And field emission scanning electron microscopy (FESEM) to study the effect of heat treatment temperature on sample stability. The results show that the changes in the heat treatment process include: low temperature reaction stage below 300 ℃, adsorption water desorption and acetate ion loss, d (002) changes from 1.41 nm to 0.908 nm and then decreases to 0.717 nm ; 400 ~ 900 ℃ in the temperature reaction, this stage the main role of dehydroxylation, into amorphous partial open stone; 900 ℃ above the high temperature reaction, the solid phase transition phase, generating mullite and cristobalite. The results show that after the dickite-potassium acetate heat treatment, the transition temperature of partial tokite decreases by about 200 ℃, and the transformation temperature of mullite increases by 30 ℃.