【摘要】 研究了10种不同杂质对硫酸钾水溶液亚稳区宽度的影响,计算了在杂质存在条件下体系成核特征值的变化。结果表明,三价离子Cr³⁺、Fe³⁺、Al³⁺使亚稳区明显加宽;二价离子Cu²⁺、Zn²⁺、Mn²⁺、Mg²⁺使亚稳区变窄;而一价离子Li⁺、NH₄⁺、Na⁺则分别使亚稳区变宽、变窄、不变。更多还原

【Abstract】 The effects of 10 different ions on the metastable zone width and the nucleation characteristic parameters of aqueous K2SO4 solution are investigated. It is observed that the metastable zone widths are increased in the presence of Li+,Cr3+,Al3+ ,Fe3+ and decreased in the presence of Cu2+, Zn2+ ,Mn2+, Mg2+ and do not greatly change in the presence of Na+ and NH4+. The influence of impurities on the metastable zone width may be the result of their effects on the specific surface energy σ12, the nucleation energy △G(r*) and the rate of crystal growth.更多还原