This paper investigated the influence of hydration temperature on the nanostructure of the AH₃ phase formed in calcium sulfoaluminate cements. Orthorhombic ye'elimite (st-ye'elimite) and cubic ye'elimite (ss-ye'elimite) were hydrated in an ultra-wide temperature range (5–220 °C). Results showed that the AH₃ phase formed by ss-ye'elimite was always microcrystalline in nature at various curing temperatures (5–130 °C), and transformed into the AlOOH phase at 150 °C and above. However, the AH₃ phase formed by st-ye'elimite grew from a microcrystal to a favorable crystal as the temperature increased, and transformed into the AlOOH phase at 170 °C and above. The nanostructure of hydration products was further investigated using TEM/SAED analysis together with FE-SEM images, directly evidencing that the formed AFm-12 phase was single-crystal in nature, and the formed AH₃ phase was microcrystalline at low temperatures and grew into single-crystal hexagonal prisms with the preferred growth direction along [001] direction at high temperatures.

本文研究了水化温度对硫铝酸钙水泥中形成的AH ₃相纳米结构的影响。正交 ye'elimite (st-ye'elimite) 和立方 ye'elimite (ss-ye'elimite) 在超宽温度范围 (5–220 °C) 内水合。结果表明，ss-ye'elimite形成的AH ₃相在各种固化温度（5-130°C）下本质上始终是微晶，并在150°C及以上转化为AlOOH相。然而，AH ₃st-ye'elimite 形成的相随着温度的升高从微晶生长为有利的晶体，并在 170°C 及以上转变为 AlOOH 相。使用 TEM/SAED 分析和 FE-SEM 图像进一步研究了水化产物的纳米结构，直接证明形成的 AFm-12 相本质上是单晶，形成的 AH ₃相在低温下为微晶并长成在高温下具有沿[001]方向的优选生长方向的单晶六棱柱。