Crystal structure and optimized microwave dielectric properties of (1 − x) LiZn0.5Ti1.5O4–xTiO2 ceramics for application in dielectric resonator
Crystal structure and optimized microwave dielectric properties of (1 − x) LiZn0.5Ti1.5O4–xTiO2 ceramics for application in dielectric resonator
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DOI：
10.1007/s10854-013-1150-1
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
Wei Wang;Huanfu Zhou;Xiuli Chen;Xiaobin Liu;L. Fang;Cheng Wang;F. He
中科院分区：
文献类型：
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作者：
Wei Wang;Huanfu Zhou;Xiuli Chen;Xiaobin Liu;L. Fang;Cheng Wang;F. He
采用固相反应法制备了（1−x）LiZn0.5Ti1.5O4（LZT）-xTiO 2（0.05 ≤x≤ 0.4）微波介质陶瓷。XRD分析表明，样品由LiZn 0. 5 Ti 1. 5 O 4和金红石型TiO 2组成，且金红石型TiO 2的含量随着x值的增加而增加。微波测试结果表明，陶瓷的介电性能随x值的增加而提高。当x = 0.1时，0.9LZT-0.1TiO2陶瓷的谐振频率温度系数（τf）可调至接近零的值−1 ppm/°C，介电常数（εr）和Q × f值分别为26和45,000 GHz。这些结果表明，0.9LZT-0.1TiO2陶瓷可以作为微波介质谐振器的候选材料。
Microwave dielectric ceramics with the composition of (1−x) LiZn0.5Ti1.5O4(LZT)–xTiO2(0.05 ≤x≤ 0.4) were prepared by a solid-state reaction route. XRD patterns revealed that the samples consist of LiZn0.5Ti1.5O4and rutile TiO2, and the amount of rutile TiO2phase increased with increasing thexvalues. The microwave measurements show that the dielectric properties of ceramics can be improved with increasingxvalues. Whenx= 0.1, the temperature coefficient of resonant frequency (τf) of 0.9LZT–0.1TiO2ceramic can be adjusted to a near-zero value of −1 ppm/°C, and permittivity (εr) andQ×fvalue are 26 and 45,000 GHz, respectively. These results indicate that 0.9LZT–0.1TiO2ceramic can be a candidate in microwave dielectric resonators.