CAJ | 학술논문

利用常规烧结方法制备出了多种A位离子掺杂的钛酸铋纳[(Bi1/2Na1/2)TiO3,BNT]无铅压电陶瓷.对BNT基陶瓷的电学性能和力学性能进行了研究.在(1-x)(Bi1/2Na1/2)0.900Ba0.088Sr0.012TiO3-x(Bi1/2K1/2)TiO3(x=0-0.14)陶瓷体系中,当x=0.10时,可获得最大压电常数(168pC/N).在1 kHz,这种陶瓷的介电常数、介电损耗和平面机电耦合系数分别为1 221,0.0361和0.2281.Curie温度随x的增加先增加,当x=0.12时,达到最高值(300℃),随后,当x值进一步增加,Curie温度降低.该种无铅压电陶瓷的Vickers硬度和断裂韧性分别为5.0GPa和2.0MP·m1/2,均高于Pb(Zr,Ti)O3陶瓷.
이용상규소결방법제비출료다충A위리자참잡적태산필납[(Bi1/2Na1/2)TiO3,BNT]무연압전도자.대BNT기도자적전학성능화역학성능진행료연구.재(1-x)(Bi1/2Na1/2)0.900Ba0.088Sr0.012TiO3-x(Bi1/2K1/2)TiO3(x=0-0.14)도자체계중,당x=0.10시,가획득최대압전상수(168pC/N).재1 kHz,저충도자적개전상수、개전손모화평면궤전우합계수분별위1 221,0.0361화0.2281.Curie온도수x적증가선증가,당x=0.12시,체도최고치(300℃),수후,당x치진일보증가,Curie온도강저.해충무연압전도자적Vickers경도화단렬인성분별위5.0GPa화2.0MP·m1/2,균고우Pb(Zr,Ti)O3도자.
Bismuth sodium titanate (Bi1/2Na1/2)TiO3 (BNT) lead-free ceramics containing multiple A-site dopants were synthesized byconventional ceramic processing, and their electrical properties and mechanical properties were investigated to reveal the effects of the multiple A-site dopants on the BNT-based ceramics. In the case of (1-x)(Bi1/2Na1/2)0.900Ba0.088Sr0.012TiO3-x(Bi1/2K1/2)TiO3(x=0-0.14) ceramics, the maximum of the piezoelectric constant d33 (168 pC/N) was obtained for the x=0.10 composition. The dielec-tric constant ε33T/ε0, loss tangent tan δ and planar electromechanical coupling factor kp at 1 kHz and room temperature are 1221, 0.0361and 0.2281, respectively. The Curie temperature first increases with increasing x value and reaches the maximum value of 300℃ at the x=0.12 composition, then decreases with further increasing of the x value. The Vickers hardness and fracture toughness of theceramics.