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%.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
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)
