TY - JOUR
T1 - Influence of Zr/Ti Ratio on the Microwave Dielectric Behavior of xZrO2-0.4(Zn1/3Nb2/3)O2-yTiO2 Ceramics
AU - Cui, Zhiyuan
AU - Shen, Chunying
AU - Qiu, Tai
N1 - Publisher Copyright:
© 2014, The Minerals, Metals & Materials Society.
PY - 2015/1
Y1 - 2015/1
N2 - XZrO2-0.4(Zn1/3Nb2/3)O2-yTiO2 (x + y + 0.4 = 2, x/y = 7/9, 8/8, 9/7, and 10/6, denoted as Z7T9, Z8T8, Z9T7, and Z10T6, respectively) ceramics were prepared by the conventional solid-state ceramic route. The objective of the present work is to determine an excellent Zr/Ti ratio for the xZrO2-0.4(Zn1/3Nb2/3)O2-yTiO2 system. The microstructure and microwave dielectric properties have been investigated as functions of the Zr/Ti ratio and sintering temperature. The crystalline phases of the (Zn1/3Nb2/3)4+-doped ZrO2-TiO2 ceramics depended greatly on the Zr/Ti ratio. The samples with Zr/Ti ratio of 7/9 and 8/8 crystallized as columbite-type-structured ZrTi2O6 phase, while the samples with Zr/Ti ratio of 9/7 and 10/6 crystallized in orthorhombic α-PbO2 ZrTiO4 structure. Secondary phase of monoclinic ZrO2 appeared when the Zr/Ti ratio was high at 10/6. Scanning electron microscopy (SEM) analysis demonstrated that dense ceramics were obtained, with increasing average grain size as the Zr/Ti ratio was increased. The microwave dielectric properties, especially the quality factor (Q×f) and temperature coefficient of resonance frequency(τf) values, were sensitive to the Zr/Ti ratio. The 0.8ZrO2-0.4(Zn1/3Nb2/3)O2-0.8TiO2 ceramic sintered at 1320°C for 3 h exhibited an excellent combination of microwave dielectric properties with dielectric constant (εr) of 40.89, Q×f of 43,300 GHz, and τf of −3.8 ppm/°C.
AB - XZrO2-0.4(Zn1/3Nb2/3)O2-yTiO2 (x + y + 0.4 = 2, x/y = 7/9, 8/8, 9/7, and 10/6, denoted as Z7T9, Z8T8, Z9T7, and Z10T6, respectively) ceramics were prepared by the conventional solid-state ceramic route. The objective of the present work is to determine an excellent Zr/Ti ratio for the xZrO2-0.4(Zn1/3Nb2/3)O2-yTiO2 system. The microstructure and microwave dielectric properties have been investigated as functions of the Zr/Ti ratio and sintering temperature. The crystalline phases of the (Zn1/3Nb2/3)4+-doped ZrO2-TiO2 ceramics depended greatly on the Zr/Ti ratio. The samples with Zr/Ti ratio of 7/9 and 8/8 crystallized as columbite-type-structured ZrTi2O6 phase, while the samples with Zr/Ti ratio of 9/7 and 10/6 crystallized in orthorhombic α-PbO2 ZrTiO4 structure. Secondary phase of monoclinic ZrO2 appeared when the Zr/Ti ratio was high at 10/6. Scanning electron microscopy (SEM) analysis demonstrated that dense ceramics were obtained, with increasing average grain size as the Zr/Ti ratio was increased. The microwave dielectric properties, especially the quality factor (Q×f) and temperature coefficient of resonance frequency(τf) values, were sensitive to the Zr/Ti ratio. The 0.8ZrO2-0.4(Zn1/3Nb2/3)O2-0.8TiO2 ceramic sintered at 1320°C for 3 h exhibited an excellent combination of microwave dielectric properties with dielectric constant (εr) of 40.89, Q×f of 43,300 GHz, and τf of −3.8 ppm/°C.
KW - Dielectric properties
KW - Quality factor
KW - XZrO-0.4(ZnNb)O-yTiO ceramics
KW - Zr/Ti ratio
UR - http://www.scopus.com/inward/record.url?scp=84925484494&partnerID=8YFLogxK
U2 - 10.1007/s11664-014-3501-y
DO - 10.1007/s11664-014-3501-y
M3 - 文章
AN - SCOPUS:84925484494
SN - 0361-5235
VL - 44
SP - 320
EP - 325
JO - Journal of Electronic Materials
JF - Journal of Electronic Materials
IS - 1
ER -