K₂O plays an important role as glass modifier in glass systems. In the present study,the effect of K₂O:Al₂O₃ ratio on crystallization and microstructural evolution in Li₂O-SiO₂- K₂O-MgO-Al₂O₃-ZnO-ZrO₂-P₂O₅ glass system has been reported. K₂O mol% has been varied from 1 to 3 mol% while keeping Al₂O₃ at 2 mol%. The glass structure was analyzed by MAS-NMR spectroscopy. Heat treated glass systems were studied by using XRD, SEM and DTA to analyse the sintering and crystallization behavior. Increased amount of K₂O modified the role of Al₂O₃, which acted as glass network former and formed [AlO_4/2] tetrahedron unit, which eventually polymerized the glass structure. Consequently, lithium disilicate (LS2) crystallization was suppressed and crystallization of lithium metasilicate (LS) was promoted. As a result, while in the sample with 1 mol% K₂O LS2 appeared as the main crystalline phase and LS as minor phase, 3 mol% K₂O samples did not show any lithium disilicate throughout the sintering temperature range. The K₂O:Al₂O₃ ratio did not have a significant impact on densification of these glass-ceramics.

K ₂ O 在玻璃体系中作为玻璃改性剂起着重要的作用。在本研究中，K ₂ O:Al ₂ O ₃比例对Li ₂ O-SiO ₂ - K ₂ O-MgO-Al ₂ O ₃ -ZnO-ZrO ₂ -P ₂ O ₅结晶和微观结构演变的影响玻璃系统已有报道。K ₂ O mol% 已从 1 到 3 mol% 变化，同时保持 Al ₂ O ₃2 摩尔％。通过MAS-NMR光谱分析玻璃结构。通过使用 XRD、SEM 和 DTA 来研究热处理玻璃系统，以分析其烧结和结晶行为。K ₂ O量的增加改变了Al ₂ O ₃的作用，Al ₂ O ₃充当玻璃网络形成剂并形成[AlO _4/2 ] 四面体单元，最终聚合玻璃结构。因此，抑制了二硅酸锂（LS2）的结晶，促进了偏硅酸锂（LS）的结晶。结果，虽然在 1 mol% K ₂ O LS2 作为主晶相和 LS 作为次要相的样品中，3 mol% K ₂O 样品在整个烧结温度范围内没有显示任何二硅酸锂。K ₂ O:Al ₂ O ₃比率对这些微晶玻璃的致密化没有显着影响。