Crystal structure and microwave dielectric properties of (Zn1−xCox)TiNb2O8 ceramics
Crystal structure and microwave dielectric properties of (Zn1−xCox)TiNb2O8 ceramics
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DOI：
10.1016/j.jallcom.2012.11.072
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发表时间：
2013-02
影响因子：
6.2
通讯作者：
Zhengli Huan;Qingchi Sun;W. Ma;Lijing Wang;Fei Xiao;Tiankai Chen
中科院分区：
文献类型：
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作者：
Zhengli Huan;Qingchi Sun;W. Ma;Lijing Wang;Fei Xiao;Tiankai Chen
研究了（Zn 1 −xCox）TiNb 2 O 8陶瓷的晶体结构和微波介电性能。结果表明，（Zn 1-xCox）TiNb 2 O 8陶瓷含有两个主要相：（Zn，Co）TiNb 2 O 8相和（Zn，Co）0.17Nb0.33Ti0.5O2相。（Zn 1 −xCox）TiNb 2 O 8陶瓷的微波介电性能受各相晶体结构变化的强烈影响。（Zn 1 −xCox）TiNb 2 O 8（x=0.1，0.2，0.3，0.4）陶瓷在1025 ~ 1125°C烧结4 h。随着Co含量的增加，（Zn，Co）0. 17 Nb 0. 33 Ti 0. 5 O2相的数量增加，导致介电常数εr增大，Q×f值减小，谐振频率温度系数τf向正方向移动。在1075°C烧结4 h后，（Zn 1-xCox）TiNb 2 O 8陶瓷的介电性能达到了最佳值：εr=35.93，Q×f=35，125 GHz，τf= 0 ppm/°C。相对较低的烧结温度（<1080°C）和微波范围内的高介电性能使这些陶瓷在电子领域的应用前景广阔。
The crystal structure and microwave dielectric properties of (Zn1−xCox)TiNb2O8ceramics have been investigated. The results showed that the (Zn1−xCox)TiNb2O8ceramics contained two main phases: (Zn,Co)TiNb2O8phase and (Zn,Co)0.17Nb0.33Ti0.5O2phase. The microwave dielectric properties of the (Zn1−xCox)TiNb2O8ceramics were strongly affected by the change of crystal structure of each phase. The (Zn1−xCox)TiNb2O8(x=0.1, 0.2, 0.3, 0.4) ceramics were sintered at temperatures ranging from 1025 to 1125°C for 4h. With the increase of Co content, the amount of (Zn,Co)0.17Nb0.33Ti0.5O2phase increased, resulting in the increase of the dielectric constant (εr), decrease of the Q×f value and the temperature coefficient of resonant frequency (τf) moving to the positive direction. The excellent microwave dielectric properties of εr=35.93, Q×f=35,125GHz, τf=0ppm/°C were obtained for the (Zn1−xCox)TiNb2O8ceramics (x=0.3) sintered at 1075°C for 4h. The relatively low sintering temperature (<1080°C) and high dielectric properties in microwave range make these ceramics promising for application in electronics.