Low-temperature sintering and microwave dielectric properties of Ba5M4O15-BaNb2O6 mixtures for LTCC applications

被引：74

作者：

Kim, DW

Hong, KS

Yoon, CS

Kim, CK

机构：

[1] Seoul Natl Univ, Coll Engn, Sch Mat Sci & Engn, Kwanack Ku, Seoul 151742, South Korea

[2] Hanyang Univ, Dept Inorgan Mat Engn, Div Mat Sci & Engn, Seoul 133791, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2003年 / 23卷 / 14期

关键词：

capacitors; dielectric properties; electron microscopy; niobates; sintering; BaNb2O6;

D O I：

10.1016/S0955-2219(03)00154-7

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The addition of B2O3 to Ba5Nb4O15-BaNb2O6 significantly lowered the sintering temperature to similar to900 degreesC in comparison to similar to1250 degreesC for samples without B2O3. The presence of a B2O3-rich intergranular phase in the sample was observed, which was attributed to the presence of a liquid phase during sintering. The barium metaniobate, BaNb2O6 has two polymorphs, with orthorhombic and hexagonal forms. A major contributor to microwave dielectric properties of low-fired samples is the low temperature phase, hexagonal BaNb2O6. The small amount of hexagonal BaNb2O6 could tune tau(f) of Ba5Nb4O15. Therefore, Ba5Nb4O15-BaNb2O6 with B2O3 can be a suitable for low-temperature cofired ceramic (LTCC), due to its reduced sintering temperature and good microwave dielectric properties: Q x f = 28 000 GHZ, epsilon(r) and tau(f) are 42 and 0 ppm/degreesC, respectively. The chemical compatibility of silver electrodes and low-fired samples has also been investigated. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：2597 / 2601

页数：5

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