TY - JOUR
T1 - Effect of heating rate on the structure evolution of (K 0.5Na0.5)NbO3-LiNbO3 lead-free piezoelectric ceramics
AU - Liu, Daijun
AU - Du, Hongliang
AU - Tang, Fusheng
AU - Luo, Fa
AU - Zhu, Dongmei
AU - Zhou, Wancheng
PY - 2008/4
Y1 - 2008/4
N2 - Lead-free piezoelectric ceramics (1∈-∈x)(K0.5Na 0.5)NbO3-xLiNbO3 (abbreviated an KNLN) have been synthesized by traditional ceramics process. Effects of heating rate on the phase structure, microstructure evolution and piezoelectric properties of (1∈-∈x)(K0.5Na0.5)NbO3-xLiNbO 3 were investigated. Results show that the heating rate has no effects on the phase structures. However, the fracture surface of the 0.94(K0.5Na0.5)NbO3 -0.06 LiNbO3 ceramics transforms from intergranular fracture mode to a typical transgranular fracture mode with the increasing of the heating rate. This result is ascribed to the presence of agglomerates of grains which exhibit different sintering behavior at diverse heating rates. The 0.94(K0.5Na 0.5)NbO3-0.06LiNbO3 ceramic sintered at 1080°C with heating rate of 5°C/min shows the optimum piezoelectric properties(d 33∈=∈210 pC/N, k p∈=∈0. 403 and k t∈=∈0.498).
AB - Lead-free piezoelectric ceramics (1∈-∈x)(K0.5Na 0.5)NbO3-xLiNbO3 (abbreviated an KNLN) have been synthesized by traditional ceramics process. Effects of heating rate on the phase structure, microstructure evolution and piezoelectric properties of (1∈-∈x)(K0.5Na0.5)NbO3-xLiNbO 3 were investigated. Results show that the heating rate has no effects on the phase structures. However, the fracture surface of the 0.94(K0.5Na0.5)NbO3 -0.06 LiNbO3 ceramics transforms from intergranular fracture mode to a typical transgranular fracture mode with the increasing of the heating rate. This result is ascribed to the presence of agglomerates of grains which exhibit different sintering behavior at diverse heating rates. The 0.94(K0.5Na 0.5)NbO3-0.06LiNbO3 ceramic sintered at 1080°C with heating rate of 5°C/min shows the optimum piezoelectric properties(d 33∈=∈210 pC/N, k p∈=∈0. 403 and k t∈=∈0.498).
KW - (KNa)NbO -LiNbO
KW - Lead-free piezoelectric ceramics
KW - Microstructure evolution
KW - Piezoelectric properties
UR - http://www.scopus.com/inward/record.url?scp=39149104053&partnerID=8YFLogxK
U2 - 10.1007/s10832-007-9373-2
DO - 10.1007/s10832-007-9373-2
M3 - 文章
AN - SCOPUS:39149104053
SN - 1385-3449
VL - 20
SP - 107
EP - 111
JO - Journal of Electroceramics
JF - Journal of Electroceramics
IS - 2
ER -