【摘要】 采用分析纯试剂制备掺钠C₃A熟料，研究煅烧温度及Na⁺掺量对矿物结构的影响机制，结合傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）及Rietveld定量分析不同温度下钠掺杂对C₃A晶体结构变化的作用规律。结果表明：Na⁺的引入显著降低液相形成温度并影响晶格畸变，当Na⁺掺量小于1%时，Na⁺以固溶形式取代Ca²⁺存在于C₃A中，晶格产生畸变，主相不变，C₃A对Na⁺的固溶能力极限为1%；当Na⁺的掺量增至3%时，晶体结构发生变化；当Na⁺掺量大于5%后，C₃A主相变化，更易形成非晶态产物。本研究不仅验证了FT-IR在熟料矿物C₃A结构表征中的适用性，更为通过离子掺杂优化水泥熟料性能提供了理论依据与实验方法参考。更多还原

【Abstract】 Analytical reagents were used to prepare sodium-doped C₃A clinker. The influence mechanism of calcination temperature and Na⁺ content on the mineral structure was studied. Fourier transform infrared spectroscopy（FT-IR）, X-ray diffraction（XRD） and Rietveld quantitative analysis were employed to investigate the effect of sodium doping at different temperatures on the changes of C₃A crystal structure. The results show that the introduction of Na⁺ significantly reduces the liquid phase formation temperature and affects lattice distortion. When the Na⁺ doping content is less than 1%, Na⁺ replaces Ca²⁺ in the form of solid solution in C₃A, causing lattice distortion, while the main phase remains unchanged. The solid solubility limit of Na⁺ in C₃A is 1%. When the doping content of Na⁺ increases to 3%, the crystal structure changes. When the Na⁺ doping content exceeds 5%, the main phase of C₃A changes and an amorphous product is more easily formed. This study not only verified the applicability of FT-IR in characterizing the structure of C₃A in clinker minerals, but also provided theoretical basis and experimental method references for optimizing the performance of cement clinker through ion doping.更多还原