Effect of Sintering Aid BaF2 Addition Amount on Microstructure and Luminescence Properties of Y2O3: Eu3+ Translucent Ceramics
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摘要: 以YOF∶Eu3+纳米粉体为原料、BaF2为烧结助剂，经干压成型后在空气气氛下烧结制备了Y2O3∶Eu3+透明陶瓷，研究了烧结助剂BaF2添加量（0～2.0%，质量分数）对陶瓷显微结构和发光性能的影响。结果表明：随着烧结助剂BaF2添加量的增加，所制备陶瓷的气孔率先降后增，透光率先增后降，当烧结助剂BaF2质量分数为1.0%时，陶瓷的气孔率最低、透光率最高；随着烧结助剂BaF2添加量的增加，陶瓷激发光谱中Eu-O电荷迁移态的峰值位置从波长252 nm处移到波长242 nm处，激发光谱中波长414 nm与397 nm对应的激发峰强度之比先增后降，当烧结助剂BaF2质量分数为1.0%时达到最大；陶瓷的发光强度先弱后强，当烧结助剂BaF2质量分数为1.0%时最弱。
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关键词:
- 烧结助剂 /
- Y2O3:Eu3+透明陶瓷 /
- 显微结构 /
- 发光性能
Abstract: Y2O3:Eu3+ translucent ceramics were prepared and sintered by dry pressing in air atmosphere with YOF:Eu3+ nano powder as raw material and BaF2 as sintering aid. The effect of sintering aid BaF2 addition amount (0-2.0wt%) on the microstructure and luminescence properties of the ceramics was investigated. The results show that the porosity of the prepared ceramics decreased first and then increased, and the transmittance increased first and then decreased with the increase of sintering aid BaF2 addition amount. The porosity was the smallest and the transmittance was the highest when the mass fraction of sintering aid BaF2 was 1.0%. With the increase of sintering aid BaF2 addition amount, the peak position of Eu-O charge transfer state in excitation spectrum shifted from the wavelength of 252 nm to wavelength of 242 nm; the ratio of excitation peak intensities at wavelength of 414 nm and 397 nm in excitation spectrum increased first and then decreased, and reached the maximum value when the mass fraction of sintering aid BaF2 was 1.0%; the luminescence intensity of ceramics decreased first and then increased, and was the smallest when the mass fraction of sintering aid BaF2 was 1.0%. -
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