Effect of La2O3 on the microstructure and optical performance of (Tb0.8Y0.2-xLax)2O3 ceramics. Issue 3 (1st February 2023)

• Record Type: Journal Article
• Authors: Zhou, Ding; Qi, Huabei; Wang, Tun; Li, Weiwei; Jing, Wei; Liu, Lili; Shi, Ying; Xu, Jiayue
• Is Part Of: Ceramics international. Volume 49:Issue 3(2023)
• Page Start: 4695
• Page End: 4700
• Publication Date: 2023-02-01
• Subjects: Microstructure -- La2O3 -- Tb2O3 -- Transparent ceramic -- Magneto-optic; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.09.358
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: (Tb0.8 Y0.2-x Lax )2 O3 transparent ceramics were prepared by using co-precipitation method combined with pressure-less sintering in flowing H2 atmosphere. Microstructure, optical transmittance, elements composition, and Verdet constant of the (Tb0.8 Y0.2-x Lax )2 O3 ceramics were studied. The amount of La2 O3 is crucial for the formation of expected transparent (Tb0.8 Y0.2 )2 O3 . With increasing content of La2 O3, the number of pores and the grain size of as-fabricated (Tb0.8 Y0.2-x Lax )2 O3 ceramics both decrease. When 4 at.% La2 O3 is doped, the (Tb0.8 Y0.16 )2 O3 transparent ceramics shows the highest transmittance of 73.3% at 1400 nm wavelength. With holding time increasing from 8 h to 15 h, the average grain size of (Tb0.8 Y0.16 La0.04 )2 O3 ceramics gradually increases from 5 μm to 13 μm. The Verdet constant measured at 633 nm is −352 rad/T·m, which is 2.63 times higher than that of TGG. In addition, large-size ceramics with Φ 20 mm × 3 mm and Φ 30 mm × 3 mm were also successfully obtained.