Measurement of dielectric properties of rare earth oxides by resonance cavity perturbation method. (January 2022)

• Record Type: Journal Article
• Authors: Lv, Peng; Zhang, Liangjing; Li, Shiwei; Chen, Kaihua; Peng, Jinhui; Yin, Shaohua; Zhang, Libo
• Is Part Of: Journal of physics and chemistry of solids. Volume 160(2022)
• Publication Date: 2022-01
• Subjects: Rare earth oxides -- Dielectric properties -- Thermostable characteristics -- Crystal transformation; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2021.110362
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: The dielectric properties and thermostable characteristics of 15 rare earth oxides are systematically investigated in microwave fields. Results indicate that the Pr6 O11 of the light and Tb4 O7 of the heavy rare earth oxides show excellent responsiveness to microwaves, both start to surge after 500 °C, with dielectric constant values of 10.814 and 10.157 (F/M) at 800 °C, respectively, meaning that it takes only 8.8 min for Pr6 O11 and Tb4 O7 to be heated from 150 to 800 °C. The dielectric properties of rare earth oxides are related to their thermostable characteristics, mainly affected by crystal transformation. Moreover, the Ln2 O3 -type rare earth oxides have no crystal transformation within the range of microwave heating to 800 °C, and the changes in dielectric properties and heating curve are attributed to lattice distortion of the particles. This work provides guidance for applications of microwave technology to the rare earth oxides. Highlights: High-temperature dielectric properties of rare earth oxides estimated in microwave fields. Thermostable characteristics of rare earth oxides estimated in microwave fields. Changes in dielectric properties of rare earth oxides correspond to crystal transformation. Leads to application of microwave heating to the rare earth metallurgy.