纳米硬硅钙石纤维的可控制备与表征

Controllable preparation and characterization of nano-xonotlite fibers

采用水热合成法制备硬硅钙石纤维,在水热合成过程中通过分阶段保温的方式实现纳米硬硅钙石纤维的可控制备,开发出水热合成纳米硬硅钙石纤维两段保温和三段保温新工艺。结果表明:传统的水热合成一段保温工艺合成的硬硅钙石纤维较粗,直径约为130 nm;两段保温工艺合成的硬硅钙石纤维较细长,直径约为80 nm;三段保温工艺合成的硬硅钙石纤维均为纳米级,长径比较大,直径约为50 nm;不同保温工艺对硬硅钙石二次粒子微观形貌的影响较大。

Xonotlite fibers were prepared by hydrothermal synthesis, and controllable preparation of nano-xonotlite fibers was realized by means of staged heat preservation during hydrothermal synthesis. A new process of two and three stages heat preservation of hydrothermal synthesis of nano-xonotlite fiber was developed. The results show that the xonotlite fibers synthesized by traditional hydrothermal synthesis of one-stage heat preservation process are coarser and the diameter of fibers was about 130 nm;the xonotlite fibers synthesized by two-stage heat preservation process are slender with a diameter of about 80 nm;the xonotlite fibers synthesized by three stages of heat preservation process are all nanoscale with the large ratio of length to diameter, and with a diameter of about 50 nm. Moreover, different heat preservation technology has a great influence on the microstructure of secondary particles.