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以白云石精制液和二氧化碳为实验原料,采用气液接触法制备碳酸钙晶须。研究了杂质离子Mg2+、NH+4和NO-3对碳酸钙晶须长径比和形貌的影响。采用扫描电镜(SEM)和X射线衍射仪(XRD)对样品的形貌和晶体结构进行表征。结果表明:NH+4浓度在0.3 mol/L,Mg2+浓度在0.05 mol/L,NO-3浓度在0.2 mol/L的情况下碳酸钙晶须的形貌和长径比最佳,其中长径比最高可以达到25以上;最后再结合晶体生长理论,阐明了碳酸钙晶须的结晶过程和生长机理。 相似文献
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Collision off-axis position dependence of relativistic nonlinear Thomson inverse scattering of an excited electron in a tightly focused circular polarized laser pulse 下载免费PDF全文
This paper presents a novel view of the impact of electron collision off-axis positions on the dynamic properties and relativistic nonlinear Thomson inverse scattering of excited electrons within tightly focused, circularly polarized laser pulses of varying intensities. We examine the effects of the transverse ponderomotive force, specifically how the deviation angle and speed of electron motion are affected by the initial off-axis position of the electron and the peak amplitude of the laser pul... 相似文献
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