Microstructure and dielectric properties of perovskite-structured high-entropy ceramics of Pb(Zr0.25Ti0.25Sn0.25Hf0.25)O3. Issue 12 (15th June 2023)

• Record Type: Journal Article
• Authors: Zhang, Han; Yang, Qingqing; Meng, Bin; Lin, Wu; Ping, Xinyu; Chen, Yingquan; Xia, Haijun
• Is Part Of: Ceramics international. Volume 49:Issue 12(2023)
• Page Start: 20398
• Page End: 20405
• Publication Date: 2023-06-15
• Subjects: High-entropy ceramics -- PbZrO3-based ceramics -- Dielectric and ferroelectric properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2023.03.168
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A dielectric high-entropy ceramic with a composition of Pb(Zr0.25 Ti0.25 Sn0.25 Hf0.25 )O3 was designed through B-site doping, and then prepared by solid phase reaction method combined with conventional sintering in air for 3 h at 1200 ° C, 1250 ° C and 1300 ° C, respectively. All the high-entropy ceramics of Pb(Zr0.25 Ti0.25 Sn0.25 Hf0.25 )O3 possess a perovskite structure with uniform elemental distribution and their average grain size falls within the range of 3.19–5.5 μm. For the sample sintered at 1250 ° C, the dielectric loss is less than 0.07 in the testing frequency of 1 kHz∼1 MHz in 30–350 ° C, and the dielectric constant reaches a peak of 14356 at about 270 ° C at 1 kHz. At room temperature, the remnant polarization P r reaches 28.8 μC/cm 2 . The results demonstrate that the high-entropy ceramic of Pb(Zr0.25 Ti0.25 Sn0.25 Hf0.25 )O3 has great potentials in the dielectric and ferroelectric field.