| Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences | Host |
| Citation: |
XIAO Yu, PENG Zhongze, FENG Jinpeng. Effects of Calcium and Silicon on the Hydrothermal Synthesis of Xonotlite Fibers[J]. Conservation and Utilization of Mineral Resources, 2018, (6): 94-97, 102. doi: 10.13779/j.cnki.issn1001-0076.2018.06.031
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Effects of Calcium and Silicon on the Hydrothermal Synthesis of Xonotlite Fibers
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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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Keywords:
- xonotlite /
- hydrothermal synthesis /
- lime /
- silica /
- fibers
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References
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XIAO Yu, PENG Zhongze, FENG Jinpeng. Effects of Calcium and Silicon on the Hydrothermal Synthesis of Xonotlite Fibers[J]. Conservation and Utilization of Mineral Resources, 2018, (6): 94-97, 102. doi: 10.13779/j.cnki.issn1001-0076.2018.06.031
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Figure 1.
Activity diagram of the calcined lime at different temperatures
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Figure 2.
FESEM images of calcined lime at different temperatures
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Figure 3.
The effect of the calcination temperature of the calcium carbonate on bulk density of xonotlite fibers
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Figure 4.
XRD images of the xonotlite fibers synthesized from calcined lime at different temperatures
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Figure 5.
The FESEM images of the xonotlite fibers synthesized from calcined lime at different temperatures
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Figure 6.
The effect of the silica powder particle size on bulk density of xonotlite fibers
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Figure 7.
XRD images of the xonotlite fibers synthesized from silica powder of different particle size
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Figure 8.
The FESEM images of the xonotlite fibers synthesized from silica powder of different particle size