Sintering behavior and physical properties of Bi0.5(Na1–xKx)0.5SnO3 lead-free ceramics
Tập 130 Số 1B (2021), Nghiên cứu
Tập 130 Số 1B (2021)

Sintering behavior and physical properties of Bi0.5(Na1–xKx)0.5SnO3 lead-free ceramics

Nghiên cứu
https://doi.org/10.26459/hueunijns.v130i1B.6191
Đã xuất bản 2021-10-05
Nguyen Truong Tho
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Le Ngoc Minh
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Le Tran Uyen Tu
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Dung Thi Hoai Trang
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Le Phuoc Dinh
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Nguyen Ly Huu Huan
University of Sciences, Hue University, 77 Nguyen Hue St., Hue, Vietnam
Le Thi Phuong Thao
Danang University of Education, The University of Danang, 459 Ton Duc Thang St., Lien Chieu Dist., Danang, Vietnam
Nguyen Thi Hue
Nguyen Tat Thanh Junior-High School, 9 Nguyen Hue St., Kon Tum City, Kon Tum, Vietnam
Ngo Minh Hau
Nguyen Hue Junior-High School, 9 Hoang Dieu St., Tuy Hoa City, Tuy Hoa, Vietnam

Tóm tắt

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.

https://doi.org/10.26459/hueunijns.v130i1B.6191
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