A larger liquid–gas interface area during the carbonation process for preparing high-purity aragonite CaCO₃ whiskers by using porous quartz stones was developed. The presence of plenty of open pores ranging from 0.02 to 0.20 mm inside the porous quartz stones could disperse CO₂ gas in Ca(OH)₂ suspension into tiny bubbles, with an average diameter ranging from 0.28 to 3.05 mm and a large liquid–gas interface area ranging from 3571.4 to 327.9 mm², respectively, which could enhance the diffusion effect of CO₂ molecules and the uniformity of carbonate ions in the system. Thus, a uniform and low supersaturation was obtained, improving the growth of CaCO₃ whiskers. The prepared CaCO₃ whiskers showed the highest purity of 99.7%. The formation mechanism of ultrahigh purity CaCO₃ whiskers was also studied in detail. Then, the prepared CaCO₃ whiskers were introduced into a PVC matrix to study their effect on the tensile strength of PVC, and the results showed that the tensile strength was enhanced by 46.4% with 5 wt% whiskers. This method provides an effective way to enhance the performance of inorganic crystals.

中文翻译：

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超高纯CaCO3晶须源自碳酸钙离子从较大的液-气界面通过多孔石英石的扩散增强

在碳化过程中使用多孔石英石制备高纯文石CaCO ₃晶须的过程中，存在较大的液-气界面面积。在多孔石英石内部存在从0.02到0.20 mm范围内的大量开孔可以将Ca（OH）₂悬浮液中的CO ₂气体分散成微小的气泡，平均直径范围为0.28到3.05 mm，并且存在较大的液化气界面面积分别为3571.4至327.9 mm ²，可以增强CO ₂分子的扩散效果和系统中碳酸根离子的均匀性。因此，获得了均匀且低的过饱和度，从而改善了CaCO ₃晶须的生长。准备好的碳酸钙_3个晶须的最高纯度为99.7％。还详细研究了超高纯CaCO ₃晶须的形成机理。然后，将制得的CaCO ₃晶须引入PVC基体中，研究其对PVC拉伸强度的影响，结果表明，添加5 wt％的晶须可使拉伸强度提高46.4％。该方法提供了增强无机晶体性能的有效方法。