TY - JOUR
T1 - Influence of Mg substitutions for Zn on the phase relation and microwave dielectric properties of (Zn1-xMgx)3Nb 2O8 (x = 0.02-1.0) system
AU - Yang, Wen Ruei
AU - Pan, Chin Cheng
AU - Huang, Cheng Liang
PY - 2013
Y1 - 2013
N2 - The effects of substituting Zn with Mg on the phase relation and microwave dielectric properties of Zn3Nb2O8 ceramics were investigated in this study. X-ray diffraction patterns illustrate that the (1-xMgx)3Nb2O8 solid solution could be formed in the composition range of x = 0-0.6, while the two phase regions with a mixture of MgNb2O6 and Mg 4Nb2O9 were identified for x = 0.8-1.0. A small level of Mg substitution (x = 0.05) substantially improved the Q × f value of the ceramics. Either decreasing the A-site bond valence or increasing the B-site bond valence leads to a decrease in the sf value. An extremely low-loss dielectric can be achieved for specimens using (Zn0.95Mg0.05) 3Nb2O8 ceramics (er ∼ 21.52, Q × f ∼ 130,000 GHz, sf ∼ -83.8 ppm/°C) after sintering at 1180 °C/4 h; consequently, it is proposed as a candidate material for high-frequency applications.
AB - The effects of substituting Zn with Mg on the phase relation and microwave dielectric properties of Zn3Nb2O8 ceramics were investigated in this study. X-ray diffraction patterns illustrate that the (1-xMgx)3Nb2O8 solid solution could be formed in the composition range of x = 0-0.6, while the two phase regions with a mixture of MgNb2O6 and Mg 4Nb2O9 were identified for x = 0.8-1.0. A small level of Mg substitution (x = 0.05) substantially improved the Q × f value of the ceramics. Either decreasing the A-site bond valence or increasing the B-site bond valence leads to a decrease in the sf value. An extremely low-loss dielectric can be achieved for specimens using (Zn0.95Mg0.05) 3Nb2O8 ceramics (er ∼ 21.52, Q × f ∼ 130,000 GHz, sf ∼ -83.8 ppm/°C) after sintering at 1180 °C/4 h; consequently, it is proposed as a candidate material for high-frequency applications.
UR - http://www.scopus.com/inward/record.url?scp=84880991891&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84880991891&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2013.07.032
DO - 10.1016/j.jallcom.2013.07.032
M3 - Article
AN - SCOPUS:84880991891
SN - 0925-8388
VL - 581
SP - 257
EP - 262
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -