Fe_2O_3－Al_2O_3钙矾石型固溶体系列

Fe 2O 3-Al 2O 3 Ettringite Solid Solution Series

钙矾石是水泥的一种重要水化产物。经过反复摸索，本研究找出了合成Ｆｅ２Ｏ３的克分子百分含量从０至１００的钙矾石型固溶体的条件。精确测定了含Ｆｅ２Ｏ３量不同的钙矾石的晶胞参数，并做了失重和差热分析。结果表明：①晶胞参数和热性能随钙矾石中的Ｆｅ２Ｏ３含量增加而连续变化；②随铁含量的增加，钙矾石晶胞变大；③钙矾石中溶入Ｆｅ２Ｏ３之后，热稳定性稍有下降，全铁端员差热曲线主吸热谷较全铝端员降低约６℃。

In this paper, Fe 2O 3-Al 2O 3 ettringite solid solution is proved to be a continuous one without a miscibility gap using XRD, DTA and TGA. The dissolution of Fe 3+ in ettringite makes its cells larger and its thermal stability a bit poor.