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Abstract：
This paper presents an evaluation of the morphology of fertilizer-grade and prill-grade ammonium nitrate(V). All samples were analyzed using X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and tomography techniques. The XRD results revealed that despite various provenances, all samples exhibited similar Pmmm symmetry and diffraction patterns. SEM images indicated that prill ammonium nitrate(V) showed a more complex external and internal crystal structure than fertilizer-grade counterparts. Furthermore, tomography analysis revealed that each prill ammonium nitrate(V) sample demonstrated distinct porosity characteristics, including varying pore sizes and distribution patterns. Both methods confirmed that fertilizer-grade ammonium nitrate(V) in the cross-section had a pumice structure, and porous prill ammonium nitrate(V) had a rather complex structure, with a central cavity observed only in the case of Sample 4. The appearance of a central cavity can be explained by the different conditions or manufacturing processes of porous prill ammonium nitrate(V). Moreover, the fertilizer-type ammonium nitrate(V) exhibited the lowest surface-to-volume ratio of ca. 21% compared to the porous-type ammonium nitrate(V). This, together with the lowest surface area of ca. 116 mm2, confirmed the lowest absorption capacity of the fertilizer-grade ammonium nitrate(V) disclosed by the ammonium nitrate(V) producer.
摘要：
本文对肥料级和颗粒级硝酸铵（V）的形态进行了评估。使用X射线粉末衍射(XRD)分析所有样品,扫描电子显微镜（SEM）和层析成像技术。XRD结果表明，尽管种源不同，所有样品表现出相似的Pmmm对称性和衍射图案。SEM图像表明，与肥料级的对应物相比，颗粒硝酸铵（V）显示出更复杂的外部和内部晶体结构。此外，层析成像分析表明，每个颗粒硝酸铵（V）样品表现出不同的孔隙特征，包括不同的孔径和分布模式。两种方法均证实，横截面中的肥料级硝酸铵（V）具有浮石结构，多孔颗粒硝酸铵（V）具有相当复杂的结构，仅在样品4的情况下观察到中心腔。中心腔的外观可以通过多孔颗粒硝酸铵（V）的不同条件或制造工艺来解释。此外，肥料型硝酸铵（V）的表面积与体积比最低。与多孔型硝酸铵（V）相比，为21％。这个,连同约的最低表面积。116mm2，证实了硝酸铵（V）生产商披露的肥料级硝酸铵（V）的最低吸收能力。
