【摘要】 以CaCO3、H2SiO3、TiO2、Nd2O3和Al2O3为原料,通过高温固相反应,制备固溶钕的榍石矿物。借助X射线衍射、扫描电子显微镜和能谱仪等分析手段,研究了钕在榍石矿物中的固溶情况,探讨了Nd3+和Al3+的引入对榍石晶格常数和晶体生长的影响。结果表明:引入Al3+进行电价补偿,Nd3+能较好地固溶到榍石晶格当中;掺入Nd3+和Al3+导致榍石晶胞a轴收缩,b轴和c轴伸展;掺入Nd3+和Al3+,榍石固溶体晶粒生长速度减慢,晶体易长成粒状体。更多还原

【Abstract】 The solid-state reaction synthesis of sphene solid solution were studied by using CaCO3,TiO2,H2SiO3,Nd2O3,and Al2O3 as raw materials and by the thermogravimetry-differential scanning calorimetry(TG-DSC),X-ray diffraction(XRD),energy disper-sive X-ray spectrometer(EDS),and scanning electron microscope(SEM) analysis.The influence of the introduction of Nd3+ and Al3+ to sphene on the lattice parameter and crystal growth,and the solidification mechanisms of sphene synroc were investigated.The results indicate that when Al3+ is introduced to sphene as electrovalence compensation,Nd3+ is solidified to the sphene crystal lattice,and the ionic radius difference causes the crystal parameters to change and influenced the crystal growth.更多还原