Journal of Synthetic Crystals, Volume. 54, Issue 5, 898(2025)
Controlled Preparation of High Aspect Ratio Calcium Carbonate Whiskers from Dolomite Refined Solution
Figures & Tables(19)
Fig. 2. SEM images of calcium carbonate samples prepared at different temperatures
Fig. 3. XRD patterns of calcium carbonate samples at different carbonization temperatures
Fig. 5. SEM images of calcium carbonate samples at different stirring rates
Fig. 6. XRD patterns of calcium carbonate samples carbonate at different stirring rates
Fig. 7. SEM images of calcium carbonate samples at different ventilation rates
Fig. 8. XRD patterns of calcium carbonate samples at different CO2 aeration rates
Fig. 9. Whisker content of calcium carbonate samples prepared at different CO2 aeration rates
Fig. 10. SEM images of calcium carbonate samples for different aging time
Fig. 11. XRD patterns of calcium carbonate samples for different aging time
Fig. 12. SEM images of calcium carbonate samples prepared from refined solutions A and B
Fig. 13. XRD patterns of calcium carbonate samples with different carbonization time for two sets of refined solutions
Table 1.
XRF composition analysis of dolomite View tableView in ArticleTable 1.
XRF composition analysis of dolomite Component CaO MgO SiO2 SO3 Fe2O3 ZnO MnO SrO Mass fraction/% 62.17 33.62 3.40 0.52 0.21 0.03 0.03 0.02
Table 2.
Composition of dolomite refined solution View tableView in ArticleTable 2.
Composition of dolomite refined solution Refined solution composition Ca2+ Mg2+ NH4+ NH3 NO3- Concentration/（mol·L-1） 0.70 0.05 1.60 1.95 3.40
Table 3.
Conversion rate of Ca<sup>2+</sup>， size and purity of calcium carbonate whiskers for different aging time View tableView in ArticleTable 3.
Conversion rate of Ca<sup>2+</sup>， size and purity of calcium carbonate whiskers for different aging time Parameter 0 h 1 h 2 h 3 h Conversion rate of Ca2+/% 93.15 95.22 95.41 94.19 Whisker length/μm 10~30 25~35 20~35 20~35 Whisker diameter/μm 1.5~2.5 0.5~1.0 0.5~1.0 0.5~1.0 Whisker aspect ratio 4~12 25~35 20~35 20~35 Purity/% 98.65 99.43 99.44 99.43
Table 4.
Composition of refined solution View tableView in ArticleTable 4.
Composition of refined solution Group Ion concentration/（mol·L-1） Ca2+ Mg2+ NH4+ NH3 NO3- A 0.70 0.05 1.60 1.95 3.40 B 0.70 0 1.60 1.45 3.40
Table 5.
SAED object matching calculation View tableView in ArticleTable 5.
SAED object matching calculation Crystal plane spacing d value of measurement/nm d value of the PDF card/nm （120） 0.314 0.310 （121） 0.275 0.273 （001） 0.546 0.574 （ 0.269 0.273 Angle of crystal plane Angle of measurement/（°） Angle calculated from PDF card/（°） （120）/（121） 28.20 28.41 （121）/（001） 61.11 61.59 （001）/（ 59.14 61.59
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Feng YU, Qiang ZHENG, Tingyu QI, Yubai ZHANG, Yali MA, Songyan JIA, Xue LI. Controlled Preparation of High Aspect Ratio Calcium Carbonate Whiskers from Dolomite Refined Solution[J]. Journal of Synthetic Crystals, 2025, 54(5): 898
Paper Information
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Received: Nov. 22, 2024
Accepted: --
Published Online: Jul. 2, 2025
The Author Email: Qiang ZHENG (zhengq_neu@163.com)
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