Ordering and microwave dielectric properties of Ba(Ni1/3Nb2/3)O-3 ceramics

被引：51

作者：

Kim, IT ^{[1
]}

Kim, YH ^{[1
]}

Chung, SJ ^{[1
]}

机构：

[1] SEOUL NATL UNIV,DEPT INORGAN MAT ENGN,SEOUL 151742,SOUTH KOREA

来源：

JOURNAL OF MATERIALS RESEARCH | 1997年 / 12卷 / 02期

关键词：

D O I：

10.1557/JMR.1997.0074

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ordering and microwave dielectric properties of Ba(Ni1/3Nb2/3)O-3 have been investigated using x-ray diffraction, transmission electron microscopy, energy-dispersive spectroscopy, and a network analyzer. Samples sintered at 1400 degrees C for 2 h were disordered and showed the presence of Nb-rich liquid phase at grain boundary junctions. Degree of ordering increased with following annealing at 1300 degrees C. Growth of the ordered region during the annealing process was discussed in terms of nucleation and growth. A long-range order parameter was calculated using structure factor. Measurements of microwave dielectric properties showed that permittivity and temperature coefficient of resonant frequency decreased with ordering, and quality factor increased with ordering. The correlation between microwave dielectric properties and ordering was discussed in terms of covalency of bonding, inhomogeneous charge distribution, and defects concentration.

引用

页码：518 / 525

页数：8

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