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Sintering behavior and dielectric properties of Bi $^{3 +}$ -substituted Nd(Zn $_{0.5}$ Ti $_{0.5}$ )O₃ microwave ceramics

Mingzhe Hu

College of Big Data and Information Engineering, Guizhou University, Guiyang, Guizhou 550025, China

Department of Physics and Electronics, Liupanshui Normal University, Liupanshui, Guizhou 553004, China

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Zhao Ding

College of Big Data and Information Engineering, Guizhou University, Guiyang, Guizhou 550025, China

E-mail Address: zding@gzu.edu.cn

Corresponding author.

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Gang Xiong

Department of Electronic and Information Engineering, Hubei University of Science and Technology, Xianning, Hubei 437100, China

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Denghui Ji

Department of Physics and Electronics, Liupanshui Normal University, Liupanshui, Guizhou 553004, China

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, and

Kesheng Zhang

College of Information Engineering, Guizhou Institute of Technology, Guiyang, Guizhou 550003, China

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https://doi.org/10.1142/S0217984915502334Cited by:1 (Source: Crossref)

Abstract

The sintering behavior and dielectric properties of Bi $^{3 +}$ -substituted Nd(Zn $_{0.5}$ Ti $_{0.5})$ O₃ (abbreviated as NZT) microwave ceramics (Nd $_{1 - x}$ Bi $_{x}$ )(Zn $_{0.5}$ Ti $_{0.5}$ )O₃ $(0 \leq x \leq 0.15)$ (abbreviated as NBZT) are investigated. XRD results reveal the formation of single perovskite solid solutions for $x \leq 0.05$ samples. For $x > 0.05$ samples, pyrochlore phase begins to segregate from the perovskite phase and its volume fraction increases with $x$ . B-site Zn $^{2 +}$ /Ti $^{4 +}$ 1:1 long range order (LRO) is detected by Raman Spectroscopy. The degree of LRO varies as a function of sintering conditions and chemical composition. The microwave dielectric properties of the composition are measured. By substituting Bi $^{3 +}$ for Nd $^{3 +}$ , the temperature coefficient of resonant frequency $(τ_{f})$ tunes toward zero, however, the microwave quality factor, $(Q f)$ deteriorates. For $x = 0.03$ , $τ_{f}$ reaches a minimum value of $- 18.9 ppm /^{\circ} C$ with relative permittivity of $ε_{r} = 48.2$ and $Q f = 1430 GHz$ , respectively. The effect of Bi-doping on the $Q f$ value is discussed.

Keywords:

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