亚共晶铝硅合金的变质元素除钠以外，还有锶、碲、钡、锑、钾、稀土、硼、硫等。其中，应用较多的是含钠和锶的变质剂。
The modifying elements used in hypoeutectic Al Si alloys, besides Na, there are also Sr, Te, Ba, Sb, K, RE, B, S, etc.
与酚类抗氧剂一起作为复合稳定剂，效果更佳。较好的草酸亚锡体系与实用的三氧化二锑体系的比较，表明在实际生产中草酸亚锡作为缩聚催化剂是很有前途的。
A comparison has been made between systems of stannous oxalate and antimony trioxide, the result shows the former has a bright future as a polycondensation catalyst in practical production.
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