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摘要:
采用动态水热合成法制备了纳米硬硅钙石纤维，研究了石灰活性和石英粒度对硬硅钙石纤维合成过程的影响规律，同时，采用场发射扫描电镜（FESEM）、X射线衍射（XRD）等测试手段对硬硅钙石纤维微观形貌和物相进行分析和表征。结果表明：碳酸钙经1 000 ℃煅烧4 h后获得的石灰活性较高，与23 μm粒径晶质石英粉反应并添加氧氯化锆作为添加剂，可制备纳米级硬硅钙石纤维，纤维直径约为82 nm，体积密度仅为70.4 kg/m3。研究结果可为超轻硬硅钙石纤维的工业化生产提供理论指导。
Abstract:Nano xonotlite fibers were synthesized by hydrothermal method in this study. The effects of lime activity and silica powder particle size on the hydrothermal synthesis of xonotlite were studied, and the phase and microstructure of xonotlite fibers were characterized by x-ray diffractometer (XRD) and field emission scanning electron microscopy (FESEM). The results show that the activity of lime obtained by calcination for 4 hours at 1 000 ℃ is higher than other temperatures. The lime combined with 23 μm silica powder and ZrOCl2 as additive can synthesize nano-scale xonotlite fibers with diameter 82 nm and bulk density 70.4 kg/m3. The results can provide theoretical guidance for the industrial production of ultra-light xonotlite.
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Key words:
- xonotlite /
- hydrothermal synthesis /
- lime /
- silica /
- fibers
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