Effect of (Tb+Y)/Al ratio on Microstructure Evolution and Densification Process of (Tb0.6Y0.4)₃Al₅O12 Transparent Ceramics

Zhong Wan; Yinzhen Wang; Jian Zhang; Shiwei Wang; Dan Han; Junping Wang; Dewen Wang

doi:10.3390/ma12020300

Effect of (Tb+Y)/Al ratio on Microstructure Evolution and Densification Process of (Tb_0.6Y_0.4)₃Al₅O₁₂ Transparent Ceramics

Materials (Basel). 2019 Jan 18;12(2):300. doi: 10.3390/ma12020300.

Authors

Zhong Wan^{1

2

3}, Yinzhen Wang⁴, Jian Zhang^{5

6

7}, Shiwei Wang^{8

9

10}, Dan Han^{11

12}, Junping Wang^{13

14}, Dewen Wang^{15

16}

Affiliations

¹ Guangdong Engineering Technology Research Center of Efficient Green Energy and Environmental Protection Materials, Guangdong Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics & Telecommunication Engineering, South China Normal University, Guangzhou 510006, China. 2016021673@m.scnu.edu.cn.
² State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. 2016021673@m.scnu.edu.cn.
³ Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China. 2016021673@m.scnu.edu.cn.
⁴ Guangdong Engineering Technology Research Center of Efficient Green Energy and Environmental Protection Materials, Guangdong Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics & Telecommunication Engineering, South China Normal University, Guangzhou 510006, China. agwyz@aliyun.com.
⁵ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. jianzhang@mail.sic.ac.cn.
⁶ Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China. jianzhang@mail.sic.ac.cn.
⁷ Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China. jianzhang@mail.sic.ac.cn.
⁸ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. swwang51@mail.sic.ac.cn.
⁹ Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China. swwang51@mail.sic.ac.cn.
¹⁰ Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China. swwang51@mail.sic.ac.cn.
¹¹ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. handan@mail.sic.ac.cn.
¹² Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China. handan@mail.sic.ac.cn.
¹³ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. wangjunping@mail.sic.ac.cn.
¹⁴ Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China. wangjunping@mail.sic.ac.cn.
¹⁵ State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. wangdewen@mail.sic.ac.cn.
¹⁶ Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China. wangdewen@mail.sic.ac.cn.

Abstract

(Tb_0.6Y_0.4)₃Al₅O₁₂ transparent ceramics were successfully fabricated by solid-state reactive sintering using Tb₄O₇, Y₂O₃, and α-Al₂O₃ powders as raw materials. The effect of (Tb+Y)/Al ratio on microstructure evolution and densification process was investigated in detailed. The results showed that the grain growth kinetics were significantly affected by (Tb+Y)/Al ratio. Al-rich and Tb-rich phases appeared in part of the samples of different ratios. Particularly, excess aluminum increased the diffusing process, leading to a higher densification rate, while samples with excess terbium ratios displayed a smaller grain size and lower relative density. The optical quality was highly related to the amount of the secondary phase produced by different (Tb+Y)/Al ratios. Finally, (Tb_0.6Y_0.4)₃Al₅O₁₂ transparent ceramics have been fabricated through pre-sintering in vacuum, followed by hot isostatic sintering (HIP), and the best transmittance of sample with a 4 mm thickness was approximately 78% at 1064 nm.

Keywords: (Tb0.6Y0.4)3Al5O12; HIP treatment; densification process; grain growth.

Grants and funding

2017YFB0310500/National Key R&D Program of China