Microwave dielectric properties of Ba-Nd-Ti-O system doped with metal oxides

被引：21

作者：

Choi, JH ^{[1
]}

Kim, JH ^{[1
]}

Lee, BT ^{[1
]}

Kim, YM ^{[1
]}

Moon, JH ^{[1
]}

机构：

[1] Chonnam Natl Univ, Dept Mat Sci & Engn, Kwangju 500757, South Korea

来源：

MATERIALS LETTERS | 2000年 / 44卷 / 01期

关键词：

relative dielectric constant (epsilon(r)); quality factor (Q center dot f(o)); temperature coefficient of resonant frequency (tau(f));

D O I：

10.1016/S0167-577X(99)00292-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bi2O3/Fe2O3 or Bi2O3/MnO were co-added to 0.15[Ba(1-x)Mx]O-0.25Nd(2)O(3)-0.6TiO(2) (M = Ca, Sr, and x = 0, 0.05, 0.1, and 0.15) to adjust its high temperature coefficient of resonant frequency to zero. The specimens were fabricated by solid state reaction, and their microwave dielectric properties were measured by Hakki-Coleman's method. When Ca and Sr of 0.15 were substituted for Ba, the tau(f) was 85 and 135 ppm/degrees C, respectively. However, as 10 wt.% Bi2O3 and 3 wt.% Fe2O3 were simultaneously added to the system in which Ca and Sr of 0.15 were substituted for Ba, the tau(f) was remarkably decreased to -5 and 6 ppm/degrees C, respectively. On the other hand, when 10 wt.% Bi2O3 and 2 wt.% MnO were simultaneously added to the same system, a tau(f) of 8 and 0 ppm/degrees C were obtained, respectively. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：29 / 34

页数：6

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