Effects of Glass Addition on Microwave Dielectric Properties of Zn0.95Mg0.05TiO3 + 0.25TiO2 Ceramics
Effects of Glass Addition on Microwave Dielectric Properties of Zn0.95Mg0.05TiO3 + 0.25TiO2 Ceramics
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DOI：
10.1143/jjap.44.1838
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发表时间：
2005-04
影响因子：
1.5
通讯作者：
Ying-Chieh Lee;Wen-Hsi Lee
中科院分区：
文献类型：
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作者：
Ying-Chieh Lee;Wen-Hsi Lee
研究了Bi2O3添加量对传统固相法制备Zn0.95Mg0.05TiO3 + 0.25TiO2与1 wt% 3ZnO-B2O3 （ZnBO-ZMT’）陶瓷的微波介电性能和显微组织的影响。初步研究表明，在900℃的温度下，ZnBO-ZMT陶瓷可以烧结到95%以上的理论密度。在860 ~ 960℃的烧结温度范围内，研究了Bi2O3添加量高达10%对ZnBO-ZMT陶瓷烧结特性的影响。采用x射线衍射和扫描电镜对烧结陶瓷样品进行了表征。结果表明，随着Bi2O3含量的增加，烧结陶瓷的密度增大，添加5 wt% Bi2O3可将烧结温度降低至880℃。添加5 wt% Bi2O3的ZnBO-ZMT '陶瓷在880℃烧结时表现出最佳介电性能：Q×f=4000 GHz, εr=24.6, τf=-14 ppm/℃。与未添加Bi2O3的zno - zmt陶瓷在920℃以上烧结不同，添加Bi2O3的陶瓷在960℃烧结时不存在Zn2TiO4。结果表明，Bi2O3的加入可以抑制ZnBO-ZMT陶瓷中Zn2TiO4的形成。
The effects of Bi2O3 addition on the microwave dielectric properties and the microstructures of Zn0.95Mg0.05TiO3 + 0.25TiO2 with 1 wt% 3ZnO–B2O3 (ZnBO–ZMT') ceramics prepared by conventional solid-state routes have been investigated. In a preliminary study, it was shown that ZnBO–ZMT' ceramics can be sintered to a theoretical density higher than 95% at 900°C. In this study, the effects of Bi2O3 additions of up to 10 wt% on the sintering characteristics of the ZnBO–ZMT' ceramics was investigated at the sintering temperatures ranging from 860 to 960°C. Sintered ceramic samples were characterized by X-ray diffraction and scanning electron microscopy (SEM). It was found that as the content of Bi2O3 increases, the density of the sintered ceramics increases, and the sintering temperature can be lowered to 880°C by adding 5 wt% Bi2O3. The ZnBO–ZMT' ceramic with 5 wt% Bi2O3 addition sintered at 880°C exhibits the optimum dielectric properties: Q×f=4000 GHz, εr=24.6, and τf=-14 ppm/°C. Unlike the ZnBO–ZMT' ceramic without Bi2O3 addition sintered at above 920°C, the ceramics with Bi2O3 additions show no Zn2TiO4 existence at 960°C sintering. It is therefore demonstrated that the addition of Bi2O3 can suppress the formation of Zn2TiO4 in ZnBO–ZMT' ceramics.