Sintering behavior and physical properties of Bi0.5(Na1–xKx)0.5SnO3 lead-free ceramics
In this study, Bi0.5(Na1–xKx)0.5SnO3 (BNKS) ceramics (x = 0, 0.1, 0.2, 0.3, and 0.4) were fabricated via ultrasound wave before milling. The time of ball milling decreased from 20 to 1 h. The X-ray diffraction patterns show that the BNKS has a single-phase structure. When the potassium content incr...
Main Authors: | , , , , , , , , |
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Format: | Article |
Language: | English |
Published: |
HUJOS
2021-06-01
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Series: | Tạp chí Khoa học Đại học Huế: Khoa học Tự nhiên |
Subjects: | |
Online Access: | http://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/6191 |
Summary: | In this study, Bi0.5(Na1–xKx)0.5SnO3 (BNKS) ceramics (x = 0, 0.1, 0.2, 0.3, and 0.4) were fabricated via ultrasound wave before milling. The time of ball milling decreased from 20 to 1 h. The X-ray diffraction patterns show that the BNKS has a single-phase structure. When the potassium content increases, the phase structure of the ceramics changes from rhombohedral to tetragonal. When sintered at 1100 °C and x = 0.2, the ceramics’ physical properties are the best with the mass density of 5.59 g/cm3, the electromechanical coupling constants kp of 0,31 and kt of 0.27, the remanent polarization of 11.9 µC/cm; the dielectric constant εr of 1131, and the highest dielectric constant emax of 4800.
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ISSN: | 1859-1388 2615-9678 |