MgO对YAG透明陶瓷烧结性能的影响  

Effect of MgO on Sintering Properties of YAG Transparent Ceramics

作　　者：覃显鹏[1] 胡松[1,2] 周国红[1] 张海龙[1] 章健[1] 王士维[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050 [2]南京工业大学,江苏南京210009

出　　处：《稀有金属材料与工程》2016年第1期240-243,共4页Rare Metal Materials and Engineering

基　　金：上海市自然科学基金项目(13ZR1445900)

摘　　要：采用真空固相反应烧结技术制备了YAG透明陶瓷,测试了陶瓷素坯的热膨胀曲线、陶瓷样品的透过光谱及表面微结构。深入研究了Mg O作为烧结助剂,其添加量对YAG透明陶瓷显微结构、光学透过率等性能的影响。结果表明,在1780℃下保温6 h,制备得到具有高透明度的YAG透明陶瓷。0.1%以上(质量分数,下同)的Mg O添加量有利于陶瓷的致密化,但由于第二相的产生及气孔不能排除,严重降低了陶瓷的光学质量;添加0.03%的Mg O最有利于透明陶瓷的烧结,制备得到的陶瓷晶粒尺寸均一,几乎无晶内及晶间气孔,其在波长1200 nm处的透过率约为82%。YAG transparent ceramic has been fabricated by the vacuum sintering technique with Mg O as sintering aids. Thermal expansion curves of the green samples, optical transmittance spectrum, and surface microstructure of the prepared YAG ceramics were measured. The effect of Mg O content on the microstructure and in-line transmittance of the samples was studied. Results show that transparent ceramics with high optical quality are obtained after vacuum sintering at 1780 °C for 6 h. Ceramics with Mg O at the level above 0.1 wt% are easy to densify; however, the second phase and pores appear then, which do harm for the optical quality of the samples. 0.03 wt% of Mg O content benefits the sintering process most. Uniform grains are gained, with neither inner nor intergranular pores. The in-line transmittance of the ceramic at 1200 nm reaches 82%.

关 键 词：YAG 透明陶瓷 烧结助剂 MGO 

分 类 号：TQ174.7[化学工程—陶瓷工业]