(1. 河北科技大学 材料科学与工程学院，石家庄 050018；
2. 河北科技大学 河北省材料近净成形重点实验室，石家庄 050018)
摘 要: 采用分析纯试剂在1500 ℃下保温2 h合成γ-2CaO？SiO2熟料，并通过溶出实验和XRD等手段研究降温速度对其分解性能和晶体结构的影响。结果表明：随着降温速度的加快，制得的γ-2CaO？SiO2的分解性能升高；随着分解时间的延长，降温速度对分解性能的影响更加明显；晶胞体积随降温速度的加快而增大，不同降温速度下制得γ-2CaO？SiO2均具有(130)晶面的择优取向；随着降温速度的加快，(130)晶面的择优取向没有变化；晶胞体积的增大促进γ-2CaO？SiO2的分解。
关键字: γ-2CaO？SiO2；降温速度；分解性能；晶体结构
（1. School of Material Science and Engineering, Hebei University of Science and Technology,
Shijiazhuang 050018, China;
2. Hebei Key Laboratory of Material Near-net Forming Technology, Hebei University of Science and Technology, Shijiazhuang 050018, China）
Abstract:γ-2CaO？SiO2 clinkers were synthesized by analytically pure reactants at 1500 ℃ for 2 h. The effect of cooling rate on decomposition property and crystal structure of γ-2CaO？SiO2 was investigated by leaching experiment and XRD method. The results show that the decomposition property of γ-2CaO？SiO2 increases with the cooling rate speeding up. The influence of cooling rate on decomposition property of γ-2CaO？SiO2 prefers more obviously with the leaching time prolonging. The crystal cell volume increases with the cooling rate speeding up. The clinkers under different cooling rate has preferred orientation on crystal face (130). With the increase of the cooling rate, the preferred orientation on crystal face (130) is constant. The increase of crystal cell volume promotes the decomposition of γ-2CaO？SiO2.
Key words: γ-2CaO？SiO2; cooling rate; decomposition property; crystal structure
