【摘要】 以高纯Al2O3和Y2O3超微粉为原料,通过高能球磨和固相反应法制备了Y3Al5O12(YAG)微晶;采用X射线衍射法(XRD)研究了球磨时间、煅烧温度、保温时间等对合成YAG微晶相组成的影响。结果表明:原料粉体的粒度随研磨时间延长而降低;随煅烧温度的提高,产物的物相由Y4Al2O9和YAlO5逐渐向YAG相转变;延长保温时间有利于Y3+和Al3+的扩散以及Al2O3和Y2O3的固相反应。当Al2O3和Y2O3的摩尔比为5∶3,混合粉体经过15h的机械球磨并于1300℃煅烧40min即可得到单一物相的YAG微晶粉末。更多还原

【Abstract】 Y3Al5O12 (YAG) crystallite powders were prepared by solid-phase reaction method through high energy ball milling with high purity Al2O3 and Y2O3 powders as raw materials. The influences of grinding time,calcinations temperature and high temperature keeping time on the phase compositions of the as-prepared YAG powders were particularly investigated by XRD analysis. Results show that with the increase of ball milling time,the average size of the powders decreases. The phases of the products transform from Y4Al2O9 and YAlO5 to Y3Al5O12 with the increase of firing temperature. Prolonging the high temperature keeping time is beneficial for the diffusion of Y3+ and Al3+ as well as the solid-state reaction between Al2O3 and Y2O3. Pure YAG crystallites can be obtained when molar ratio of Al2O3 to Y2O3 arrives to 5∶3,milling time reaches 15 h for 40 min high temperature calcinations at 1300 ℃.更多还原