覃显鹏.MgO对YAG透明陶瓷烧结性能的影响[J].稀有金属材料与工程,2016,45(1):240~243.[Qin Xianpeng.The effect of MgO on the properties of YAG transparent ceramics[J].Rare Metal Materials and Engineering,2016,45(1):240~243.]
MgO对YAG透明陶瓷烧结性能的影响
投稿时间:2014-02-19  修订日期:2014-03-14
中文关键词:  YAG  透明陶瓷  烧结助剂  MgO
基金项目:上海市自然科学基金项目
中文摘要:
      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MgO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小时,制备得到具有高透明度的YAG透明陶瓷。0.1 wt.%以上的MgO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 wt.%的MgO最有利于透明陶瓷的烧结,制备得到的陶瓷晶粒尺寸均一,约为10 μm,几乎无晶内及晶间气孔,其在1200 nm处的透过率约为82 %。
The effect of MgO on the properties of YAG transparent ceramics
英文关键词:YAG  transparent ceramic  sintering aids  MgO
英文摘要:
      YAG transparent ceramic has been successfully fabricated by the vacuum sintering technique, with MgO 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 MgO content on the microstructure, in-line transmittance of the samples was systematically studied. Transparent ceramics with high optical quality were obtained after vacuum sintered at 1780 ℃ for 6 h. Ceramics with MgO at the level above 0.1 wt.% were easy to densify, however, the second phase and pores appeared then, which did harm for the optical quality of the samples. 0.03 wt.% of MgO content benefited the sintering process most. Uniform grains with about 10μm were gained, with neither inner nor intergranular pores. The in-line transmittace of the ceramic at 1100 nm reached 82%.
作者单位E-mail
覃显鹏 中国科学院上海硅酸盐研究所 qinxianpeng888@163.com 
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