Heating parameter optimization and optical properties of Nd:YAG transparent ceramics prepared by microwave sintering. Issue 13 (September 2020)

• Record Type: Journal Article
• Authors: Han, Yanxue; Feng, Jinyang; Zhou, Jian; Li, Feng; Huang, Xiaoguang; Wang, Lin; Liu, Guizhen; Cheng, Jiping
• Is Part Of: Ceramics international. Volume 46:Issue 13(2020)
• Page Start: 20847
• Page End: 20855
• Publication Date: 2020-09
• Subjects: Nd:YAG transparent Ceramics -- Microwave heating parameters -- Microstructure -- Optical properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.05.117
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Nd-doped YAG transparent ceramics were prepared by microwave sintering. In this paper, the green bodies from high-purity commercial powders were sintered from 900 °C to 1750 °C for different lengths of time (0.5–2 h) by microwave heating. By optimizing the microwave heating parameters (the heating rate at different stages of microwave sintering, sintering temperature and holding time), the microstructures and optical properties of transparent ceramics can be effectively improved. The phase transformation, densification process and optical properties of Nd:YAG transparent ceramics were discussed. The liquid phases strongly absorb microwave radiation and affect the sintering results of samples during microwave sintering. The highest in-line transmittances of Nd:YAG transparent ceramic fabricated at 1750 °C for 2 h were 76.5% at 400 nm and 80.6% at 1064 nm. The fluorescence emission spectra and lifetime depending on different heating conditions were also discussed.