The microwave dielectric properties and the microstructures of La2O3-modified BiNbO4 ceramics

被引：26

作者：

Huang, CL ^{[1
]}

Weng, MH ^{[1
]}

Wu, CC ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 70101, Taiwan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2000年 / 39卷 / 6A期

关键词：

BiNbO4; low-temperature sintering; microwave dielectric material; microstructure; phase transition;

D O I：

10.1143/JJAP.39.3506

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The microwave dielectric properties and the microstructures of La2O3-modified BiNbO4 ceramics were investigated. (Bi1-xLax)NbO4 ceramics combined with orthorhombic and triclinic phases are identified at sintering temperatures of 920-980 degrees C. The density and grain size of (Bi1-xLax)NbO4 ceramics both increase with increasing sintering temperature while both decrease slightly with the increase of La2O3 content. The dielectric constant epsilon(r), the quality factor Q and the temperature coefficient of resonant frequency tf of the ceramics are affected by the La2O3 content and correlated with its microstructure. At a sintering temperature of 920 degrees C and x value of 0.01, (Bi1-xLax)NbO4 ceramics exhibit the microwave dielectric properties of epsilon(r) similar to 43.36, Q x f similar to 10600 (at 7 GHz), and tau(f) similar to 2 ppm/degrees C.

引用

页码：3506 / 3510

页数：5

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