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Phase evolution, Raman spectroscopy and microwave dielectric behavior of (Li1/4Nb3/4) doped ZrO2-TiO2 system

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Abstract

The phase evolution, Raman spectroscopy and microwave dielectric properties of (Li1/4Nb3/4) doped ZrO2-TiO2 system were investigated. The effects of the Zr/Ti ratio and the (Li1/4Nb3/4) substitution were addressed. X-ray diffraction and electron diffraction analysis showed that the crystalline phases of the (Li1/4Nb3/4) doped ZrO2-TiO2 ceramics depended greatly on the Zr/Ti ratio. The sample with Zr/Ti ratio of 7/9 crystallized as Zr5Ti7O24 phase structure, a commensurate structure with a tripled a-axis superstructure and a ZTTZTT sequence. Secondary phase of monoclinic ZrO2 phase appeared when the Zr/Ti ratio was as high as 9/7. Raman analysis showed that the Raman peaks located at 651 and 624 cm−1 were assigned to the vibration modes of Zr-O octahedron and Ti-O octahedron, respectively. The dielectric constant and quality factor (Qf value) of the (Li1/4Nb3/4) doped ZrO2-TiO2 ceramics decreased slightly as the Zr/Ti ratio changed from 6/10 to 9/7. The temperature coefficient of resonate frequency (TCF value) was sensitive to the Zr/Ti ratio and it showed a negative value when the Zr/Ti ratio was close to 5:7. Meanwhile, the TCF value of ZrO2-TiO2 ceramics could also be tailored by the (Li1/4Nb3/4) substitution.

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Authors and Affiliations

  1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi’an Jiaotong University, Xi’an, 710049, China

    Li-Xia Pang, Hong Wang, Di Zhou, Yue-Hua Chen & Xi Yao

  2. Laboratory of Thin Film Techniques and Optical Test, Xi’an Technological University, Xi’an, 710032, China

    Li-Xia Pang

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  1. Li-Xia Pang
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  2. Hong Wang
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  3. Di Zhou
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  4. Yue-Hua Chen
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Correspondence to Li-Xia Pang.

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Pang, LX., Wang, H., Zhou, D. et al. Phase evolution, Raman spectroscopy and microwave dielectric behavior of (Li1/4Nb3/4) doped ZrO2-TiO2 system. Appl. Phys. A 100, 1205–1209 (2010). https://doi.org/10.1007/s00339-010-5838-2

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