摘要
本文用微波法煅烧高岭土并合成４Ａ沸石。与传统高温热处理法相比，微波法煅烧的高岭土其活化深度好，增白程度高，粒度细，能耗大为降低，显示了明显的优越性。 本文还采用煅烧后的活性高岭土为原料，在微波辐射下进行４Ａ沸石的合成，并用ＸＲＤ、ＤＴＡ、ＳＥＭ、白度计、钙离子交换度等进行表征。与传统水热处理法相比，微波法所得样品在结晶度、白度和钙离子交换能力方面均显优势，且大大地加快了沸石晶化反应速率。经动力学处理，发现微波法合成４Ａ沸石的晶核形成及晶体成长的表观活化能均有所下降，说明微波辐射能促进新相的形成，加快整个晶化反应速率。
The calcination of Kaolinite and synthesis of 4A Zeolite with microwave method have been in vestigated. Compared with the traditional method of treatment at high temperature, the method of calcination Kaolinite with microwave has several merits such as: increasing whiteness, decreasing size of particles and saving energy and time. Compared with the traditional hydrotherml crystallization method, the method of synthesis with microwave has advantages as fellows: crystallinity, the particle size distribution and Ca2+ exchange capacity of 4A zeolite are all improved, The apparent activation energies for nucleation and crystal growth are reduced. Microwave radiation promote producing of new phase, and increase the rate of crystallization.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2000年第5期769-774,共6页
Chinese Journal of Inorganic Chemistry
基金
国家863项目。
