Effect of anions from calcium sources on the synthesis of nano-sized xonotlite fibers  

作　　者：刘飞 陈莎 林倩 王晓丹 曹建新 

机构地区：[1]School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China [2]Key Laboratory of Green Chemical and Clean Energy Technology, Guiyang 550025, China [3]Key Laboratory of Efficient Utilization of Mineral and Green Chemical Technology, Guiyang 550025, China

出　　处：《Optoelectronics Letters》2017年第2期81-83,共3页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21666007);the Science Technology Foundation of Guizhou Province(No.2014-2007);the Program for “Hundred” High-Level Talents in Guizhou Province(No.2016-5655)

摘　　要：The xonotlite fibers were synthesized via the hydrothermal synthesis method with CaO and SiO_2 as the raw materials and the molar ratio of Si/Ca of 1.0. Effect of anions from various calcium sources on the microstructure of the xonotlite fibers is studied in this paper. These obtained products were characterized by X-ray diffraction(XRD), transmission electron microscope(TEM) and scanning electron microscope(SEM) techniques to investigate their crystalline phase, crystal structure and morphology. The results indicate that anion from various calcium sources has little influence on the crystalline phases of xonotlite fibers but poses a great impact on their morphologies. Xonotlite fibers with single crystal characteristics and large aspect ratio of 50—100 were successfully fabricated from CaCl_2 as calcium material at 225 °C for 15 h. The existence of Cl-anion in the CaO-SiO_2-H_2O system significantly contributes to the formation of xonotlite crystal.

关 键 词：crystalline sized hydrothermal molar anion fibrous silica mixing crystallized colloidal 

分 类 号：TQ340.1[化学工程—化纤工业]