Open AccessSintering behavior and physical properties of Bi0.5(Na1–xKx)0.5SnO3 lead-free ceramics
Author(s) -
Nguyen Truong Tho,
Le Ngoc Minh,
Le Tran Uyen Tu,
Dung Thi Hoai Trang,
Le Phuoc Dinh,
Nguyen Ly Huu Huan,
Lê Thị Phương Thảo,
Nguyễn Thị Huệ,
Ngo Minh Hau
Publication year - 2021
Publication title -
tạp chí khoa học đại học huế: khoa học tự nhiên/tạp chí khoa học đại học huế: khoa học tự nhiên (online)
Language(s) - English
Resource type - Journals
eISSN - 2615-9678
pISSN - 1859-1388
DOI - 10.26459/hueunijns.v130i1b.6191
Subject(s) - materials science , tetragonal crystal system , ceramic , dielectric , sintering , diffraction , polarization (electrochemistry) , ball mill , phase (matter) , mineralogy , trigonal crystal system , analytical chemistry (journal) , composite material , crystal structure , crystallography , optics , chemistry , optoelectronics , physics , organic chemistry , chromatography
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.